2005 Audi A4 / S4 Audi A4 / S4 2005

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2005 Audi A4 / S4 repairs by problem area

Engine (49%)

Transmission and Drivetrain (7%)

Brakes and Traction Control (2%)

Suspension and Steering (12%)

Electrical and Air Conditioning (20%)

Paint, Rust, Leaks, Rattles, and Trim (5%)

Other (5%)

Chart based on 482 repairs.
See TSBs and recalls for the 2005 Audi A4 / S4.

2005 Audi A4 / S4 repair cost distribution

$2500+ (8%)

$1000 - $2499 (13%)

$500 - $999 (17%)

$100 - $499 (30%)

< $100 (31%)

Worried about potential repair costs? An extended warranty can provide peace of mind.

Chart based on 337 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2005 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

Audi S4 in South Carolina, United States
Nov 2008 - Apr 2016
Oct 2008

40000 mi
Passenger Window Regulator New Window Lock Switch New Front Upper Control Arms New Glove Box Door 
Jun 2009

43000 mi

US $28
Hood strut failure. Ordered new hood strut and installed. Problem solved. 
Oct 2009

45000 mi

US $300
A/C Compressor malfunction. Was operating intermittantly, repaired under CPO Passenger Control arm replaced under CPO 
Apr 2010

47000 mi

US $800
Replaced serpentine belt, pulley and tensioner Replaced valve cover gaskets 
Apr 2016

64000 mi

US $135
Replaced valve cover gaskets, air filter and cabin filter 
Audi S4 in Denmark
Oct 2012 - Mar 2014
Jan 2013 Aux cooler pasenger side changed due to leaking. 
Audi S4 in Washington, United States
Apr 2011 - Aug 2013
Jun 2011

75000 mi

US $250
Intermittent starting problems due to faulty engine speed sensor. Repair pending approval by extended warranty provider. valve covers leaking oil. Also peeling and blistered paint. Extended warranty provider denied coverage because leakage "minimal," so not fixed. Upper radiator hose leaking coolant. repaired after approval for repair by extended warranty provider. 
Jul 2011

75700 mi
Crank position sensor replaced  Window washer fluid began leaking. Determined leak was from faulty pump. Pump replaced. 
Dec 2011

82000 mi

US $110
Replaced weak battery 
Aug 2013

106000 mi

US $700
check engine light, engine began misfiring. Diagnosed as failed plugs and replaced all 8 spark plugs. Replaced valve cover gaskets to address worsening oil weeping. 

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2005 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed manual AWD

Audi S4 in Texas, United States
Jul 2009 - Dec 2011
Nov 2009

88000 mi

US $100
the driver window regulator (window stopped rolling up) 
Mar 2010

95000 mi
seat heaters did not work 
Jan 2011

102500 mi

US $300
Replace valve cover gaskets (leaking bad), replace serpentine belt and related components as preventative maintenance. Replace starter (intermittent failing). 
Aug 2011

111000 mi

US $1200
Replace all 4 front upper control arms. Also required the bearing carrier on the driver side to be replaced due to a heavily corroded pinch bolt. replace all 4 front upper control arms 
Audi S4 in Minnesota, United States
Sep 2008 - May 2015
Mar 2010

54000 mi
Wiper linkage frozen at one of two pivot points. 
Aug 2010

58000 mi
Coil pack failure, all coil packs replaced under recall notice. Car was due to go in for the recall 7 days later, but one coil pack decided to fail prior to the repair appointment. 
Apr 2011

66000 mi
Wiper mechanism frozen at one of the two pivot points. Removed assembly from car, disassembled & lubricated, and reinstalled back into car. 
Jul 2011

67000 mi
A/C blows hot air all of a sudden. Shop checked system, plenty of R134 in system. Shop not sure what the problem is, need to bring car back for further diagnostic work. 
Aug 2011

68000 mi

US $200
A/C was still not working properly. Took to dealer as previous mechanic at non-Audi shop felt there was something wrong with the system (and not just low on R134a). Dealer could find no issues other than low R134a level. 
Sep 2012

81000 mi

US $250
Airbag light on, replaced one of the passenger side airbags. 
Dec 2012

84000 mi

US $3700
Flywheel defective, made engine vibrate. Dealer replaced flywheel, clutch, bearing and slave cylinder. 
Oct 2014

94200 mi

US $400
Power steering hose burst, hose was replaced. 
Audi S4 in California, United States
Sep 2010 - Sep 2021
Nov 2010

65000 mi

US $1600
Front passenger head light would fail after 1 to 2 hours. This is a failure mode of a bad Xenon headlight. 
Jun 2011

70000 mi

US $1100
Replaced Full set of control arms. Boots in bad shape, the Repair shop said. 
Mar 2012

74000 mi

US $400
Front passenger wheel bearing wore out Drivers side sun visor became lose. 
Jan 2013

83000 mi
Recharged the AC but still doesn't blow very cold. Probably needs more work. Slight smell of coolant when heat is on. 
Dec 2013

92000 mi

US $1100
Valve cover gaskets need replacing Hatch latch does not open when sun is shining on the hatch. replace servo, didn't fix second replacement replaces another switch 
Apr 2015

100200 mi

US $1000
Oil gasket in V of engine was leaking. Need to take off throttle body replace oil gasket 
May 2015

101000 mi

US $220
Every year I need to get my AC recharged. The shop has looked for the leak for the last 4 years and has never found, so I will go in to the shop in late spring and get a recharge. 
Jul 2016

106300 mi

US $1400
Both lower front radiators developed leaks and needed to be replaced. 
Sep 2016

108000 mi

US $3
Hose broke off from windshield washer fluid bottle 
Audi S4 in Netherlands
Jun 2013 - Jul 2015
Nov 2013

99200 mi

€450
part of wiring loom to ecu needed replaced water damage 
Jul 2015

110980 mi

€5000
cam timing out, replace a whole bunch of parts, engine removal required to complete 
Audi S4 in Virginia, United States
Jun 2014 - May 2015
Apr 2014

89000 mi

US $1000
Fuel Pump 
Jun 2014

95000 mi

US $65
Check Valve (Y-Valve) 
Jul 2014

93000 mi

US $2125
Timing Components/Adjuster Valve stem seals. Clutch/PP replaced Valve Stem Seals Timing Components 
Aug 2014

93000 mi

US $3500
When replacing valve stem seals, we noted that my exhaust valve couldn't hold pressure. Led us to do a compression and additional leak down test. Then confirmed bent exhaust valves, had to rebuild my cylinder heads. Cylinder Heads 
Sep 2014

94000 mi
Bad tensioner Bad Tensioner 
May 2015

96000 mi

US $150
Crank Position Sensor? 
Audi S4 in Ontario, Canada
Jul 2014 - Jul 2015
Sep 2014

73160 mi

C $240
Blown power steering return line. 
Mar 2015

80600 mi

C $2875
Clutch, flywheel, clutch release bearing replaced. Replaced with B7 parts, as they are considered an upgrade on a (B6) S4 with higher clamping load and a slightly lighter flywheel. 
Jun 2015

83080 mi

C $100
Power steering pump whining due to Wrong type of fluid used during line repair last fall. Flushed power steering system with proper fluid and filled with correctly specified fluid. 
Jul 2015

83080 mi

C $600
Replaced left and right front upper control arms. Rubber bushings were worn out. 

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2005 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

Audi S4 in Texas, United States
Sep 2010 - Jun 2011
Oct 2010

68000 mi
High pressure steering hose failed, had to be replaced. $120 in parts, $230 in labor. Pass cat replaced under emissions warranty. 
Apr 2011

76000 mi

US $45
Front passenger window regulator failed. Cabling found broken and frayed during replacement. 
Audi S4 in Montana, United States
May 2011 - Oct 2011
Sep 2011

95000 mi

US $360
Replacement of Crankshaft Position Sensor. Intermittent no-start condition and a P0322 ECU code. 
Audi S4 in Wisconsin, United States
Oct 2010 - May 2012
Feb 2011

76000 mi

US $400
Power steering hose cracked and lost all fluid instantly. $100 hose, and $300 labor 
Audi S4 in California, United States
Jul 2010 - Jul 2011
Aug 2010

76000 mi
Replace compressor. replace compressor 
Mar 2011

84000 mi
Driver seat heater failed. New heater grid replaced under warranty 
Audi S4 in Maryland, United States
Mar 2009 - Mar 2012
Jan 2009

57000 mi

US $500
Replace the front sway bar endlinks. 
Feb 2012

115000 mi

US $960
Power steering failed. It was the result of the return hose from the steering rack to the pump. Hose replaced. 
Audi S4 in Illinois, United States
May 2009 - May 2013
Jun 2009

44500 mi

US $220
Replaced a Coil Pack 
Jul 2009

45300 mi

US $1000
Air Bag Light on-Replaced Air Bag Sensor, Leaking Sealant/Coolant Gasket, Replaced Tailight bulb, Performed 45,000 maintenance sErvice with brake flush. 
Dec 2009

47000 mi
Dealer replaced seven coilpacks due to recall. 
Sep 2010

51000 mi

US $550
Replaced wiper linkage mechanism after wipers froze. 
Jun 2011

57000 mi

US $300
Passenger front window regulator not working 
Audi S4 in North Carolina, United States
Mar 2010 - Jul 2010
Jul 2010

62000 mi
Water pump replacement pending when sold. It was leaking a small amount of coolant, about a 3-4 oz. per week. 
Audi S4 in California, United States
Dec 2012 - Jun 2018
Jan 2013 Both CV boots were torn 
May 2015

67000 mi

US $400
Both front O2 sensors showed varied fuel trims 
Oct 2015

68200 mi

US $55
Coolant overflow tank developed a small crack at the top and was leaking coolant/steam after short drives, replaced coolant tank with Genuine Audi unit at a cost of $55 shipped. 
Sep 2016

70000 mi

US $6
Upper coolant flange failed, part replaced 
Audi S4 in New Jersey, United States
Sep 2012 - Apr 2013
Apr 2013

75000 mi

US $1000
Control arms 

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2005 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

Audi S4 in Wisconsin, United States
Apr 2009 - Oct 2009
Apr 2009

43000 mi
The windshield wiper transmission/motor went out and needed to be replaced. 
May 2009

44000 mi

US $50
Power steering hose broke. Lots of labor involved in fixing 
Audi S4 in Alberta, Canada
Apr 2009 - Feb 2011
May 2009

56420 mi
Exessive oil consumption, car needs a new short block according to Audi. Audi has denied warranty but dealer paying since problem documented and started at 41k. 
Jun 2009

56420 mi

C $2000
excessive oil use, engine replaced. 
Jul 2009

60140 mi

C $1000
AC failed, requires new compressor $1400 item, plus costs of a dryer. http://audiwarranty.blogspot.com CEL codes P2097 Description: Post catalyst fuel trim system too rich P2098 Description: Post catalyst fuel trim system too lean audiwarranty.blogspot.com Car brought to a private repair shop for service, replaced a part of the AC unit, but problem persists, car needs a new AC compressor 
Sep 2009

61380 mi
Dealer has not been able to diagnose the problem, car still throwing codes after 200 to 400kms of driving. See my blog at http://audiwarranty.blogspot.com 
Nov 2009

61380 mi
Problem still ongoing, now starter is failing, that will be next repair. http://audiwarranty.blogspot.com 
Dec 2009

63240 mi
New A/C compressor. 
Jan 2010

63080 mi
Car would not brake, shop had bled brakes but not topped up master and as a result brakes did not work well. Did job myself, took a couple hours to bleed all 4 corners. Starter failure, car would not start for a long time when cold, replaced clutch switch, checked battery, then replaced starter problem solved. Actuator was stuck open and car would not come up to temperature, shop replaced faulty actuator problem solved. possible cause because car was apart for a long time waiting for short block at dealer for oil consumption. 
Apr 2010

65300 mi

C $800
HVAC pressure switch failure and system leak 
Aug 2010

66640 mi

C $400
Failed crankcase regulator valve, caused oil leak from valve cover gaskets. Replace regulator will wait and see if valve cover gaskets need to be replaced. 
Audi S4 in New Jersey, United States
Apr 2010 - Jul 2010
Jul 2010

110000 mi

US $1800
AC clutch seized. Replaced bent control arms and various bushings. When sold the driver door handle would sometimes not work from the outside. 
Audi S4 in Iowa, United States
Aug 2010 - Dec 2016
Aug 2013

93000 mi

US $350
Driverside window glass would not rise up. 
Apr 2014

97000 mi
Door window switches, locks, sensors on driver's not working 
Audi S4 in Kentucky, United States
Mar 2010 - Sep 2011
Oct 2010

50500 mi

US $110
Drivers' side window regulator failed. New regulator installed 
Mar 2011

54000 mi
Headlights were wet inside. Sealed the adjustment screw with silicone. 
May 2011

56600 mi

US $540
High pressure hoses & seals of Power Steering were leaking a lot. After starting the (cold) motor, it rattled for about 2-3 seconds. Did an oil & oil filter change and changed from 5W30 to 5W40. After starting the (cold) motor, it rattled for about 2-3 seconds. Did an oil & oil filter change and changed from 5W30 to 5W40. Power steering system was leaking. Hoses and seals have been replaced. 
Audi S4 in Rhode Island, United States
Jan 2012 - Apr 2012
Feb 2012

90700 mi
dealer tried the cam-position sensors and the clutch sensor. turned out to be the starter 
Audi S4 in Texas, United States
Aug 2016 - May 2017
Sep 2016

136000 mi

US $180
Severe shaking from engine when accelerating, CEL. Was only a spark plug causing a misfire, throwing the CEL. Replaced all spark plugs. 
Audi S4 in Virginia, United States
Jul 2013 - Dec 2016
Aug 2013

98000 mi

US $1428
Slow loss of engine coolant, but no drips or puddling. Turned out to be passenger side auxiliary radiator was coming apart at the seems, so had it replaced. Check engine light coming on, then going off a few days later. Trouble codes were for misfire in cylinders 1 & 2. Ignition and Fuel systems both checked out fine, but exhaust check showed passenger side catalytic converter was very clogged. car in to dealer for 95K mile service check. They found worn out upper control arm bushings on passenger side. Estimate for replacing was $1383. They said would not pass VA state inspection, so recommended to replace. car into dealer for 95K mile service. They found DTC's for failing radiator fan control module. However the car has not been running hot or giving any indication of issues with cooling fan. Dealer estimate of $703 to replace. 
Sep 2013

98000 mi

US $275
power steering hose ruptured between cooler and steering rack. Obtained replacement hose myself and performed the work at a friends garage. Upper control arm bushings badly deteriorated. Flagged as an issue on annual safety inspection. Replaced all 4 upper control arms (both sides) for $300. Work done by owner at a friends garage. 
Oct 2013

98000 mi

US $2200
passenger side down pipe / catalytic converter severely clogged, causing DTC's and bad engine misfiring. Replaced entire exhaust system with stainless after market system for price of just the 1 factory down pipe. reverse lights not working, replaced reverse light switch at the 6MT transmission. 
Nov 2013

98000 mi

US $30
Plugs were badly fowled due to clogged down pipe on passenger side. The exhaust system had been replaced but afterwards the engine still did not run smoothly, so all spark plugs were replaced, which fully resolve the issue. 
Jun 2014

105000 mi

US $140
Front Driver side window regulator went out. I was able to get a replacement part online and performed the repair myself. 
Mar 2015

114000 mi

US $180
Badly worn lower control arm bushings, driver side. Replaced both lower control arms, drivers side. 
Apr 2015

114300 mi

US $1800
total clutch / pressure plate failure, which required replacement of both as well as flywheel. Driver's side 1/2 shaft / drive axle had worn CV joints and torn CV boot. Replaced entire 1/2 shaft. 
Nov 2016

131000 mi

US $575
CV boots on passenger side split wide open, slinging great all over the place... Axle as a whole was fine, but the cost of replacing just the boots compared to a new shaft was not much different, so opted for the new shaft assy. 
Audi S4 in California, United States
Aug 2014 - Nov 2014
Oct 2014

104000 mi

US $20
coolant expansion tank hairline fracture and leak 
Audi S4 in Maryland, United States
Mar 2009 - Mar 2010
Jun 2009

44000 mi

US $440
Headlight sensor was bad. Replaced rearview mirror. 
Audi S4 in Illinois, United States
Mar 2008 - Jul 2012
Jun 2008

29405 mi
anti-rattle clips were squeaking. replaced under warranty. 
Sep 2008

33214 mi
driver's switch for a rear window stopped working. switch replaced under warranty. 
Oct 2008

35159 mi
headlamp assemblies fogged up. replaced under warranty. 
Mar 2009

41315 mi
windshield wiper motor seized. replaced under warranty. 
Audi S4 in Delaware, United States
Mar 2010 - Apr 2018
Aug 2010

31500 mi
Car needs a new AC compressor A/C condenser replaced 
Sep 2010

34000 mi
Plastic part that surrounds fog light fell off. Took part to dealer and was reattached in minutes with a new fastener that had broke. 
Jan 2011

US $50
Burning oil odor - valve covers replaced under warranty. Driver seat heater not working. Seat heating element was replaced 
Nov 2011

39300 mi

US $100
Window regulator was broken. Covered under Audi Pure Protection Gold Warranty 
Sep 2012

46000 mi

US $400
Glove box door was broken and had to be replaced. 
Nov 2012

47100 mi

US $500
Mass Flow Sensor had to be replaced 
Dec 2013

57000 mi

US $800
Power steering cooling return line broke. 
Jul 2014

59200 mi

US $1000
Replaced upper control arms - all 4 Crank position sensor replaced 
Audi S4 in California, United States
Nov 2014 - Mar 2015
Dec 2014

104000 mi

US $600
brake master cylinder failure 
Audi S4 in Illinois, United States
Nov 2010 - Dec 2011
Jun 2011

81000 mi

US $19000
Engine and clutch replacement. Engine had a crack in cylinder wall 1. Clutch replaced while engine was replaced as preventitive. No previous clutch failure. 

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2005 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

Audi S4 in Illinois, United States
Apr 2010 - Oct 2013
Apr 2011

89500 mi

US $1900
power steering failed, lots of noise, hard to steer. Towed to shop. Told the steering rack was leaking. Worst case scenario. 
Dec 2011

99000 mi

US $180
windshield wiper drive mechanism broken, replaced shaft 
Nov 2012

105500 mi
driver front wheel bearing made noise, needed replacement 
Sep 2013

113000 mi

US $350
Serpentine belt failed due to oil leak on engine cam covers. Doing that fix leter. 
Audi S4 in Delaware, United States
Dec 2012 - Jan 2014
Jan 2014

75000 mi
Glass separating from convertible top. Was told it was a common issue 
Audi S4 in Washington, United States
Sep 2010 - Jul 2018
Sep 2010

26000 mi

US $300
Engine has whine/whirl sound. Dealer acknowledged but cannot fix. Does not downshift on incline in drive; RPM's will drop below 1,000. Have to manually downshift or engine lugs. Sport mode car will not up-shift until RPM's exceed 4K. 
Jun 2011

31000 mi
4.2 liter motor makes terrible grinding noise when starting. Audi Tech Bulletin advises this is normal and caused by a slow adjusting camshaft chain adjuster. Problem so bad no dealer will trade, and, no buyer will purchase car. 
Oct 2011

32000 mi
Loss of perfromance, would not shift out of 1st gear, stability control intermittent, no transmission safety switch (could shift into gear without pressing brake). Sensor replaced. 
Mar 2013

41000 mi

US $550
Replaced valve cover gaskets 
Feb 2017

51000 mi

US $2400
Upper Control Arm busings Right and left rear CO2 sensors 
Audi S4 in Illinois, United States
Sep 2010 - Sep 2021
Apr 2011

44000 mi
passenger window does not operate with all windows switch. 
Jun 2013

55000 mi

US $100
replaced ECM relay 
Apr 2015

51000 mi

US $1200
conv. top storage compartment. broken piece of plastic . had to order compleete trunk kit $560.00 ... oil leak 
Aug 2020

62000 mi

US $500
Re glue rear window 
Sep 2021

64000 mi

US $260
Replace 2 radiators. Main land left Motor mount 
Audi S4 in California, United States
Jun 2010 - Jun 2022
Jul 2010

70000 mi

US $300
various hoses were leaking oil 
Feb 2011

77000 mi
The front air dam under the engine came loose and was dragging. My mechanic fixed it at no charge. 
Dec 2011

90000 mi

US $500
Replace valve seals Fuel valve at gas tank failure 
Nov 2012

102300 mi

US $1521
Power steering hose broke and was replaced Driver side axle shaft failure 
Mar 2013

104000 mi

US $275
Replace hood strut Convertible top not operational. Diagnosed as locking system. did not repair. 
Oct 2015

104000 mi

US $300
Battery replace along with oil change. Other items needed fixed but the dealer was asking for my first born and she wasn't willing so I found a great independent shop. 
Nov 2015

104300 mi

US $5000
Had a coil over system installed along with new sway bars and control arms. Car needed an update and control arm bushings needed replacement. Locking mechanism of convertible top failed and had to be replaced 
Dec 2015

104000 mi

US $1750
Hood and trunk lid paint oxidized and needed repainted. Additional touch ups done and some custom work. 
Sep 2016

106000 mi

US $3900
Fan replaced Motor mounts Serpentine belt replaced 
Jan 2017

106000 mi

US $400
Car wouldn't start. After a while it would start and run for a while, then it would just shut down. Some type of small electrical part that malfunctioned. 
Apr 2017

106000 mi

US $1000
possible catalytic converter failure, has to go back in to further diagnose 
Jun 2017

107000 mi

US $2900
Catalytic converters were replaced. I went with CARB approved Magnaflow after market products Control arms and rubber bushings were replaced. 
Jul 2018

108000 mi

US $3000
Replaced valve covers Needed 3 liters of fluid. Can't find any leaks. First time we have put fluid in. Still don't see leaks after a couple of weeks. New OEM clamps and hoses put in along with a coolant temperature sensor because everything apart already. Unbeknownst to me, a previous mechanic had replaced the OEM clamps and hoses with non-OEM items. My current mechanic noticed some wear and suggested replacement, especially with OEM. 
Oct 2021

111000 mi

US $600
New radiator Seals connected to the engine. Still needs repaired. 
Feb 2022

111000 mi

US $500
Computer not communicating with engine and information is not available Seal from the transmission to the engine is leaking 
Audi S4 in Illinois, United States
Mar 2009 - Sep 2009
May 2009

45000 mi

US $85
Tension strings for soft top needed to be replaced on both sides. 
Aug 2009

49000 mi

US $85
Replaced coilpack 

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2005 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed manual AWD

Audi S4 in Pennsylvania, United States
May 2012 - Jul 2020
Sep 2015

61000 mi

US $2700
Replaced entire convertible top because original rear window fell out and cannot be glued back in place. Also happened to our previous Audi TT. Bought aftermarket top with stitched in window, not an Audi part! 
Jun 2017

69000 mi

US $6000
Corrected the known design flaw in the hydraulic cam chain tensioner and chain guides. Absent corrective action, complete engine failure ($12k) could otherwise result anytime between 55k and 130k miles. Also had a new clutch installed while the engine was out of the car. 
Nov 2017

71110 mi

US $748
The ignition coil went bad on cylinder #8. Would have cost $278 to do just that one or, $748 to do all eight. I figured this first one was a domino and that the others would follow so we opted to be preemptive and do them all. 
Audi S4 in Massachusetts, United States
Mar 2008 - Dec 2016
Apr 2010

54500 mi
replaced all ignition coils 
Apr 2011

63300 mi

US $700
alternator belt & tensioner alternator belt & tensioner 
May 2014

95100 mi

US $390
Low oil pressure warning light came on due to faulty switch. 
Jun 2015

102000 mi

US $5200
A/C compressor, HVAC hoses,  valve cover gaskets, thermostat, radiator hoses, misc gaskets, drive belt 
Audi S4 in California, United States
Jun 2012 - Jul 2012
Jul 2012

62000 mi

US $300
Replaced coil packs again after getting misfired (even though the car was already running the new 'revised' packs - version T.) The packs were about 18 months old. 
Audi S4 in Ohio, United States
Sep 2011 - Jan 2013
Jan 2013 Rear windshield coming unglued. 
Audi S4 in Alberta, Canada
Dec 2009 - Feb 2015
Jan 2010

48360 mi
Starter motor not working properly. Memory switch for recalling position of driver's seat had to be replaced. 
Dec 2010

52700 mi
Crankcase ventilation valve replaced to resolve excessive oil consumption and leak from one head gasket. 
Feb 2011

53940 mi
Mild oil leak from headgasket, not severe enough and problem may be resolved because of replacement of crankcase ventilation valve. 
Mar 2011

55180 mi

C $1100
Head gaskets in both banks of cylinders were replaced to correct oil leakage. 

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2005 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 6-speed manual AWD

Audi A4 in Oregon, United States
Sep 2009 - Apr 2018
Oct 2009

88000 mi
Ignition coil packs failed on me - fourth one in two years. 
Dec 2009

90000 mi
The pressurized cylinder which keeps the hatch open on the wagon ripped out of the steel mount on the D-pillar. 
Jul 2010

96300 mi

US $150
Car was pulling to the right. Alignment didn't help, so adjusting the steering rack on my own seemed to help a bit. 
Jun 2011

108000 mi
Drivers window switches popped down into the door. Had to take apart door to fix. 
Apr 2012

117300 mi
stuttering upon hard acceleration 
Sep 2012

123000 mi

US $12
Small coolant leak 
Dec 2012

127000 mi

US $760
Hoses were disintegrating and falling off. 
Jan 2013

114200 mi

US $20
Windshield washer pump was leaking 
Mar 2014

143000 mi

US $70
Valve cover rubber gasket seal replacement as oil was leaking into the spark plug holes. 
Dec 2015

162000 mi

US $450
Coolant leak at the front of the engine. Also changed timing belt at the same time as it was in the same area. 
May 2016

165000 mi

US $50
Radiator hose connector failed causing coolant to leak profusely 
Jun 2016

166000 mi

US $10
Coolant leak at the rear coolant flange and plastic coupler to the heater core. It was leaking about a cup a day, and I thought It was just loose, so I tightened the flange against the block as well as the plastic coupler. It still leaked. 
Jul 2016

167000 mi

US $10
After the second repair in June, in July I replaced the plastic coupler between the rear coolant flange and the heater core. That fixed the problem. I believe the new flange I initially bought was of the wrong size causing the leak. Success! 
Sep 2016

172000 mi

US $100
Replaced engine mounts. They were leaking fluid. 
Jul 2017

176000 mi
Check engine light came on for P0133 oxygen sensor. I reset it and it hasn't come back this month yet. 
Apr 2018

182000 mi
Leaking cooling system yet again from the back of the engine. The leak slowed, but not fully stopped. Will need to attempt again. 
Audi A4 in Alberta, Canada
Jun 2010 - Jul 2011
Aug 2010

74880 mi

C $100
glovebox hinge 

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2005 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

Audi A4 in Nevada, United States
Mar 2010 - Mar 2013
Apr 2010

28000 mi

US $312
repair fluid leak in windshield washer fluid reservoir 
Jun 2010

29000 mi

US $75
replace defective daylight running light bulb 
Sep 2012

35000 mi

US $300
hard downshift from 2 to 1. software reprogramming to fix problem 
Audi A4 in North Carolina, United States
Mar 2008 - May 2013
Oct 2008

50000 mi
Driveshaft seal replacement (at transaxle) 
Dec 2008

52000 mi
Replaced all ignition coils. 
Apr 2010

64000 mi

US $100
electronic stability control fault light--repaired by replacing brake line. 
Jun 2010

65000 mi
Side impact airbag fault tripped the dashboard "air bag" light 
Mar 2011

70000 mi

US $2000
Replaced defective seals and vacuum hoses 
Dec 2012

93000 mi

US $800
Temp sensor and cracked cooling control housing had resulted in lost coolant Significant ongoing oil loss. compression test passed. Crankcase ventilation/pressure system failure suspected. 
May 2013

98000 mi
Compressor failure; needed replacement Still losing oil when last had it. 

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2005 Audi A4 4dr Wagon

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

Audi A4 in North Carolina, United States
Nov 2009 - Jun 2011
Feb 2010

49000 mi

US $100
Transmission seal replaced 
Audi A4 in California, United States
May 2008 - Jun 2011
Sep 2008

41000 mi
Drivers window regulator failed. 
Mar 2009

47000 mi
Leaking headlamp cluster, rough cold start resulting in one time "Check Engine Light" which reset itself upon restarting. Replace randomly operating sunroof switch. Repair "lazy" retracting driver's side seat belt. 
Apr 2009

49000 mi
Engine Coolant began leaking all over garage floor. Car was immediately driven to local Audi dealer. Same problem of Trip 1: Engine coolant leak that was unsuccessfully diagnosed/repaired on the original trip to the dealer. 
Nov 2009

53800 mi

US $50
Leaking rear output transmission shaft and left front axle seal. Driver's window regulator failed..again. 
Dec 2009

55000 mi
Ignition coil failure. Replaced all six ignition coils. 

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2005 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

Audi A4 in California, United States
Mar 2008 - Jun 2010
Jun 2008

64000 mi

US $150
ignition coil packs 2 of 4 failed. 
Jun 2010

84000 mi
A/C not blowing cold when idling when sold. 
Audi A4 in Florida, United States
Dec 2011 - Jul 2017
Jan 2012

US $2095
Thermostat, both electrical fans and control unit replaced. 
Apr 2013

61000 mi

US $2640
CVT was beginning to fail. Replacing CVT transmission. 
Oct 2014

75000 mi

US $1935
Windshield wiper pump replaced. Coolant flange replaced. Valve gasket replaced. 
Dec 2016

98000 mi

US $1100
Both cooling fans failed AGAIN. Replaced.  Windshield washer pump failed. Replaced. Button on window master control unit. Replaced unit. Recharged AC. 
Jul 2017

103000 mi

US $360
Coolant flange replaced for second time. 
Audi A4 in California, United States
Sep 2009 - Nov 2014
Jul 2010

85000 mi

US $650
leaking engine mount left axle boot was ripped; replaced. interior overhead light rattled at speed. An anti rattle pad was inserted 
Apr 2011

89200 mi
valve cover and cam seals leaking; very minor oil leak so I won't repair now. upper control arm bushings are weak. 
Jun 2011

90000 mi
valve cover, cam seals, and broken hoses replaced to eliminate leaking oil and burning oil smell in interior. 
Oct 2011

96000 mi

US $150
Check engine light indicated that cooling system temperature sensor had failed. It was replaced. 
Nov 2012

106100 mi

US $650
Engine mounts replaced 
Jun 2013

110000 mi

US $975
leaky O rings; replaced O rings and added coolant A/C flap behind glove box opened intermittently; as a result A/C sometimes was fine, other times was only available on right side of car with outside temperature air blowing in on the left side. Flap replaced. left inside CV boot leaking. Boot replaced. 
Oct 2013

114500 mi

US $597
Flange on rear of cylinder head leaking coolant. Coolant flange replaced as well as temp. sensor and hose from flange to heater core. 
Oct 2014

125000 mi

US $70
Ignition coil died. I replaced three by myself (I had done another a few months ago). Took me 10 minutes. 
Nov 2014

125000 mi
upper control arm bushings weak, never replaced. 
Audi A4 in Florida, United States
Sep 2015 - Sep 2017
Nov 2015

115000 mi

US $150
trunk opener system leaks - oil. coolant low engine power 
Jan 2017

155000 mi

US $700
continuous coolant leaks, heated motor 
Audi A4 in California, United States
May 2009 - Oct 2010
Jun 2009

70000 mi

US $2000
Car had issues with the MAF and O2 sensor 
Mar 2010

80000 mi

US $1400
Transmission Control Module failed, caused a check engine light. Covered under california emissions until 70,000 miles I am at 78,000. 
Oct 2010

84000 mi
Glovebox actuator was stuck and broke the lid. Antenna booster stopped working and no radio signal. They replaced the booster. 

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2005 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed manual AWD

Audi A4 in Ontario, Canada
Apr 2011 - Jun 2013
Jan 2013

84940 mi

C $2200
throttle body, intake gasket, and exhaust gas hoses replaced. 
Audi A4 in New Hampshire, United States
Sep 2008 - Jun 2011
Oct 2008

48000 mi
Ignition coil on cylinder 1 was replaced. Cost $0.00 since it's under warranty. 
May 2009

65000 mi
Retractable Cup Holder issues. It wouldn’t open. DIY of 5 minutes with cotton swabs and WD40 to fix what was causing it to stick. The job fixed it, no issues since. 
Oct 2009

76000 mi

US $50
Leaking coolant flange, replaced by dealer under warranty, out of pocket cost $50. 
Nov 2009

78000 mi
HVAC issues, getting no heat from the car. Got it fixed at the dealer at no cost. Something regarding a locked vent not moving to control airflow; all fixed and have heat. 
Dec 2009

80000 mi
CEL Light went on for P0420 code. Replaced O2 sensor and had a vacuum leak and it fixed it. 
Feb 2010

85000 mi

US $50
Wiper linkage failed. EPC light came on causing failed attempts at starting the car and rough idle. 
Audi A4 in Virginia, United States
Nov 2010 - Jul 2012
Oct 2011

93500 mi

US $5000
Turbo blew 
Audi A4 in Colorado, United States
Aug 2009 - Mar 2010
Mar 2009

52000 mi

US $30
Replaced 1 Coil Pack 
Audi A4 in Washington, United States
Aug 2010 - Jan 2011
Sep 2010

70000 mi

US $200
drivers side power window stuck, mechanism replaced 
Audi A4 in New Hampshire, United States
May 2010 - Sep 2011
Jun 2010

63000 mi

US $10
replaced leaking coolant bleeder screw 
Nov 2010

68400 mi

US $170
Timing belt,water pump and tensioners 
Audi A4 in California, United States
Nov 2011 - Jan 2014
Dec 2011

72000 mi
Loud rattles from under the car, drivers side. I'd hear it at about 2500-3200 rpm's. Turned out to be a busted support rod connecting/supporting both mufflers. The rod was welded back together and the problem resolved. 
Feb 2012

75000 mi

US $250
Oil leaks found in driverway after vehicle purchase. Valve cover and tensioner gaskets replaced.  Passenger side motor mount replaced due to leak. 
Mar 2012

76000 mi

US $330
Worn coolant flange and o ring which was a result of a bad valve cover gasket that leaked oil down over the flange over time. Coolant temp sensor was also replaced. 
May 2013

92000 mi

US $442
Driver's side motor mount replaced due to leakage of all hydraulic fluid. I did not notice much driving, I saw oil spots in the driveway and took the car in since the timing belt was replace about 2 weeks prior. 
Audi A4 in Massachusetts, United States
May 2008 - Jun 2011
Nov 2008

105000 mi

US $200
Two worn out control arms. 
Audi A4 in Ontario, Canada
Feb 2012 - Mar 2012
Mar 2012

89900 mi

C $500
Had to replace clutch-exploded into pieces 
Audi A4 in Saskatchewan, Canada
May 2009 - Jan 2010
Jan 2010

C $386
regular maintenance plus replacement of two engine coils 

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2005 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

Audi A4 in Michigan, United States
Oct 2013 - Jan 2017
Jun 2015

145000 mi

US $3400
Cracked cylinder head 
May 2016

158000 mi

US $1900
Turbo went bad after wastegate stayed open, I hear this is a common problem for the 1.8t 
Jun 2016

159000 mi

US $449
Update: took my car to another shop and they found it was a clogged PCV valve and my breather hose was the problem not the turbo saved 1500 on the repair that the dealer quoted me for 
Jul 2016

160000 mi

US $750
Got me Cat replaced after CEL came back on still not sure if the problem is solved MPG has not gone back up, but only 1 day of city driving 
Nov 2016

166000 mi
My starter went out when I pulled into a Rest Area, car would not re-start had it towed to a local shop and they replaced it for 250 bucks, much cheaper than the Audi dealership, they do GREAT WORK for half the cost 
Audi A4 in Pennsylvania, United States
Dec 2014 - Sep 2016
Mar 2016

179000 mi

US $300
Car died on highway, got AAA to tow me, alternator was not charging the battery, battery. Changed alternator and battery. Car is back on road. 
Audi A4 in New Jersey, United States
Mar 2008 - Mar 2012
Aug 2008

42300 mi
Water Pump replaced under warranty. Pump was working but was making a noise. 
Nov 2008

46000 mi

US $400
A Coil Pack shorted and caused the check engine light to come on. Since the incremental cost was marginal I had all four coil packs replaced. 
Apr 2010

58000 mi

US $1200
Replaced Radiator due to pin hole leak.  
Audi A4 in Pennsylvania, United States
Jun 2014 - Jan 2019
Dec 2015

151000 mi

US $300
replaced battery a month prior and new battery was not charging properly. Thought could be alternator. 
Jun 2016

161000 mi

US $2000
a/c compressor failed. replaced entire a/c compressor and serpentine belt 
Sep 2017

180000 mi

US $125
drive sensor replacement 
Dec 2017

183000 mi

US $1200
engine mounts replaced exhaust repair 
Jan 2018

183000 mi

US $900
timing belt, water pump and hoses 
Audi A4 in California, United States
May 2013 - Mar 2016
Feb 2014

129700 mi

US $453
Coolant flange at rear of engine needed to be replaced due to cracking. 
Apr 2015

142000 mi
Bad temp sending unit for coolant. 
Jan 2016

134200 mi

US $1000
timing belt, coolant leak: flange at the back of the engine was replaced. 
Audi A4 in Illinois, United States
Mar 2013 - Mar 2018
Jun 2016

78000 mi

US $3380
Water pump froze up, causing timing belt to skip, which, in turn, resulted in damage to 2 valves. 
Audi A4 in New York, United States
Oct 2010 - Apr 2018
Nov 2010

61000 mi

US $20000
front tires had outside wear, steering loose . 4 upper control arms needed to be replaced on front left and right wheels. 
Jul 2014

103500 mi
Engine speed sensor 
May 2017

117000 mi

US $200
AC compressor bearing was making a lot of noise. Had to replace AC compressor and new belt Accessory belt pully Tie rod end and inner. Both loose Throttle body electrical connector kept getting water in it some how. This was shorting out. Car would not have any power and stall if floored. Had to cut off old connector and splice in a new one. 
Apr 2018

118500 mi
Driver side front axle boot ripped leaking grease. Replaced axle with aftermarket. Exhaust leak at flex joint Front passenger side lower rear control arm Wipers moving very slow 
Audi A4 in Georgia, United States
Jun 2007 - Jun 2011
Aug 2007

63000 mi

US $330
Drivers side window regulator failure and needed to be replaced. 
Sep 2007

64000 mi

US $50
Flemsy console arm broken and replaced. 
Oct 2007

65000 mi

US $300
Ignition coils and spark plugs replaced due to multiple check engine instances flagging cylinder misfires. (in the end valve cover seal) 
Jan 2008

71500 mi

US $300
Glove compartment door hinges break and have to replace whole door. 
Apr 2008

74000 mi

US $900
Seal on front axle, left side, bad and had to be replaced. 90% of total was labor costs. 
Jul 2008

76000 mi

US $330
Passenger side window regulator failure and needed to be replaced. 
Aug 2008

76500 mi

US $150
Gears in sunroof switch broken and needed to be replaced. 
Dec 2008

82000 mi

US $900
Seal on front axle, right side, bad and had to be replaced. Again, 90% of total was labor costs. 
Jan 2009

84000 mi

US $100
New spark plugs due to continued misfiring. (in the end valve cover seal) 
Apr 2009

88000 mi

US $700
Valve cover seal replaced because it was leaking to spark plugs causing previous failures. 
Sep 2010

117000 mi

US $400
Driver and Passenger Window regulators for the second time each. 
Dec 2010

121000 mi

US $500
Cooling fan and ac condenser fan replaced 
Mar 2011

126000 mi

US $2150
Thermostat and housing, $350 All vacuum lines under the intake manifold, $600 Crank Shaft Tensioner seal, $1200 
Jun 2011

126000 mi

US $60
PCV Valve 
Audi A4 in Ohio, United States
May 2008 - Jan 2012
Oct 2008

41000 mi
Coolant leaked below minimum level. Coolant warning light on. Added water to system and drove to dealer. Pressure test found coolant flange seal leaking. Coolant flange seal replaced. 
Dec 2008

42000 mi
Drivers window grinding and not functioning. Cable came out of regulator. Left front electric window regulator removed and reinstalled. 
Jun 2009

46000 mi

US $50
Airbag light was on. Drivers side igniter upper limit exceeded. Drivers seat wiring harness for airbag repaired. 
May 2010

53300 mi

US $53
Air bag light came on for second time in a year. First time was wiring under driver seat. This time was wiring under passenger seat. 
Apr 2011

60200 mi
Dealership installed leaky oil filter during previous maintenance. Subsequent trip failed to identify source of leak. They determined on this trip and replaced the filter. 
Oct 2011

65000 mi

US $675
PCV valve was replaced. Caused rough idle and check engine light to flash Passenger door window regulator broken 
Audi A4 in Colorado, United States
Nov 2009 - Jun 2012
Sep 2011

91000 mi

US $400
crank shaft sensor need to be replaced. was intermittently stopping the car from starting 
Jan 2012

82700 mi

US $800
rear brakes 
Audi A4 in Illinois, United States
Jul 2009 - Oct 2011
Oct 2009

53000 mi

US $3
Right rear tail light. 
Feb 2010

59000 mi

US $17
Head light repair 
Audi A4 in Colorado, United States
- Dec 2008
Apr 2007 Mileage unknown/Warranty Replace cup holder and front window motor 
Sep 2007 Mileage unknown warranty Coolant sensor replaced, ignition coils replaced 
Oct 2007 Mileage unknown/Warranty Thermostat replaced 
Jan 2008

39012 mi
Warranty Ignition coil replaced 
May 2008

40936 mi
Warranty Replace glove box door, replace cup holder, replace window regulator 
Jun 2008

42928 mi
Warranty Replaced coil TOWED 
Jul 2008

43276 mi
Replace air conditioner compressor , reinitialized window memory 
Oct 2008

51300 mi
Certified used car warranty Replace driver's door motor, replace sunroof potentiometer, replace fuel pump 
Dec 2008

51300 mi
Certified used car warranty Replace catalytic converter, replace fuel tank, replace coolant plug 

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2005 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual FWD

Audi A4 in Texas, United States
May 2008 - Mar 2010
Jul 2008

59000 mi

US $50
Original turbocharger was going bad, & was replaced under certified pre-owned warranty without any further issues. 
Dec 2008

69000 mi

US $50
Coolant hose adapter was cracked. Power steering hose leak.  

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2005 Audi A4 4dr Sedan

220-horsepower 3.0L V6 6-speed manual AWD

Audi A4 in Massachusetts, United States
Jul 2009 - Jun 2011
Apr 2010

109000 mi

US $900
Defective headlamp sensor detector failure lamp intermittently lights up on lateral acceleration 
Audi A4 in California, United States
Aug 2015 - Jun 2018
Sep 2015

124000 mi

US $550
Oil leak from valve cover gasket 
Feb 2016

131300 mi

US $150
Small leak on radiator, replaced it myself with aftermaket NISSIN radiator, direct fit and G12 Coolant 
Mar 2016

133000 mi
Leaking Driver side valve cover gasket. It was previously replaced by shop in Sept '15, and they replaced it at this visit free of charge under warranty. 
Jul 2016

138000 mi

US $600
Front Right wheel bearing making noise. Tried to replace but pinch bolt was sized to knuckle. So needed to buy a new Knuckle and did the upper and lower control arms, and tie rods while at it (bushings cracked). 
Aug 2016

139600 mi

US $45
Car would sometimes not start when hot. (Cranks over, but not start.) Replaced the crank position sensor. 
Sep 2017

143000 mi

US $225
Driver side valve cover replacement. Oil leak due to warped cover. 
Audi A4 in British Columbia, Canada
Nov 2008 - Apr 2021
Dec 2008

34720 mi
3 coil packs needed replacing. Power steering noisy. Fluid flush performed and replacement power sterring hose ordered for installation in January, 2009. 
Feb 2009

36580 mi
Replaced power steering hose and checked system for leaks; topped up power steering fluid 
Mar 2009

37820 mi
Front right wheel bearing noisy and replaced. 
Aug 2009

40920 mi

C $100
Scheduled maintenance visit; Reported noisy front end; diagnosed cause - leaking seal on steering rack; problem resolution - replace steering rack under CPO warranty 
Jul 2010

50840 mi

C $100
Water Pump replacement and 100000 KM maintenance Rear diff seals leaking Valve covers seeping oil Power steering return hose weeping; power steering fluid low; replaced hose 
Feb 2013

74280 mi

C $3000
Control arm replacement Valve cover gaskets replaced 
Sep 2013

79360 mi

C $836
Front subframe welding repair for clunking noise CEL - misfire on cylinders 2,3,6; replaced colipacks 
Nov 2013

79980 mi

C $850
Clunking over bumps; replaced front swaybar bussings and front struts 
May 2015

90520 mi

C $300
G62 Coolant Temperature Sensor replaced. MIL indicated low signal for sensor. 
Nov 2015

94240 mi

C $600
Very noisy power steering when turning; not resolved on 1st visit Readdress power steering noise from pervious repair trip Engine misfiring - MIL ON; 4 coilpacks diagnosed as faulty. replaced all 6 coilpacks on engine 
Feb 2016

96680 mi

C $200
Nylon coolant tank hose connectoin broke off. 
Nov 2016

102160 mi

C $1250
Wishbone failure 
Apr 2017

107880 mi

C $500
Serpentine Belt Tensioner Replacement Replaced front brake pads and rotors 
Aug 2017

112220 mi

C $839
Front Passenger Window Regulator replaced 
Feb 2018

115940 mi

C $387
Battery 5yrs old 

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2005 Audi A4 4dr Sedan

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

Audi A4 in California, United States
Aug 2009 - Sep 2012
Dec 2009

65000 mi

US $30
One of the ignition coils failed. I was close to the dealership and was able to drive there. A total of four coils were replaced under manufacturer's recall. the remaining two coils had already been replaced under warranty. 
Feb 2010

67300 mi

US $650
Front suspension bushings worn out and replaced. Car was also aligned as part of this repair. 
Jul 2010

73700 mi

US $400
Power steering slowly leaks fluid into the steering rack. Excess fluid drained form bellows sealing the rack and fluid topped up again. R/H glovebox hinge failed. No real reason and not worth the cost of repairing. Living with the problem 
Feb 2011

86000 mi

US $2150
Oil leaks from camshaft covers and sump. Gaskets replaced. Leaking coolant line, the subject of a TSB is leaking. Repair requires expensive intake manifold removal to get at source of leak so I've decided to live with the problem. We've had unusually heavy rain here since December and the Xenon headlights fog up very heavily when it rains. It's always been a problem but the dealer tells me it's normal even though the light output is badly reduced. Audi won't fix 
Apr 2011

88000 mi

US $850
Fuel pump failed while car was on freeway. 
May 2011

89300 mi
Significant coolant leak from cross pipe located under intake manifold. Will live with problem for time being. 
Jul 2011

92000 mi
Major coolant pipe had become brittle and degraded from heat and was leaking. Why Audi choose to use short life span parts baffles me. Pipe is under intake manifold so a heavy labor charge to replace it.  
Oct 2011

99000 mi
Hood strut has completely failed. Not worth the cost of replacement bur annoying nontheless. 
Sep 2012

116000 mi

US $400
Front struts should be replaced. Quoted cost is $800 - $1050. Car has developed a bad oil leak from a crack in the upper sump. No known cause. Since the proper repair is an engine out job I'm investigating alternatives. JB Weld didn't work. 
Audi A4 in Pennsylvania, United States
Sep 2013 - Jun 2018
Sep 2013

70000 mi

US $700
Rear coolant crossover pipe. 
Sep 2015

88000 mi

US $400
Crossover coolant pipe. Update, late October: already leaking again. "O"-ring going bad. It's about a 1-1/2 hour repair job for a $40 part and very tedious to get behind the engine block. 

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2005 Audi A4 2dr Convertible

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

Audi A4 in Texas, United States
Dec 2008 - Feb 2014
May 2009

53000 mi

US $250
Check engine light came on, code was for new transmission, warranty co. asked to clear code and see if check engine light returned before replacing transmission. Check engine light came back on at 25 miles, the problem was not a new transmission, but a sensor, dealer ordered the part and I drove my car home to wait for it. The part came in, the dealer repaired it, the extended warranty paid 100%, less the $250 deductable. 
Jan 2011

66000 mi

US $450
Leaking valve cover gasket, fouled the spark plugs. Replaced valve cover gasket and engine breather hoses to oil separater which had crumbled apart during the gasket repair.  
Feb 2013

83100 mi

US $400
Check engine light came on, essentially needed a tune-up, new plugs, etc. and a lecture on using premium gas, NOT regular unleaded. 
Mar 2013

84000 mi

US $95
Took the car in for check engine light, re-set the check engine light, and the warning has not returned. They found a rattling brace and fixed it. 
May 2013

85000 mi

US $345
The dreaded intermittent electrical problem. With no rhyme nor reason the dash display goes dark, the A/C ceases to work and the radio turns off. Radio can be turned on again, but not the A/C. Shop replaced ignition switch, problem not fixed 
Dec 2013

89000 mi
Continuation of intermittent electrical problem plaguing car since March. Ran fault codes, found ect sensor @ 48c degrees, replaced, Installed new sensor in water neck flange at radiator, problem in instrument cluster, no repair attempted. AC head control unit had internal short circuit, shorting out the comfort system. Instrument cluster was having catastrophic communication problems. Faulty AC control head unit and instrument cluster were replaced and re-coded. "Econ" button was stuck on...no heat, no air-cond. just outside air coming through the vent. system. New instrument cluster needed to be re-programmed. I am taking the car back to the original shop to take care of the ongoing check engine light and the abs system randomly coming on, I anticipate the repair being done this month (Dec.) 
Jan 2014

82000 mi
Trip was to work on check engine light, abs brake light and traction light from previous trip, ec sensor was changed for the third time, to no avail, as soon as warning lights are cleared, they reappear.  Also, crimped wires from the trunk lid wiring harness are giving false brake light out warning lights....The Audi wiring harness is roughly $4200 for the part alone, so it will either be spliced to fix, or I will learn to live with it if I keep the car. 
Feb 2014

89000 mi
Check engine light still on, went to dealer discussed my options with the service tech, chose not to go through another round of diagnostic tests, traded the car in on a 2012 VW Eos. Crimped wires from the trunk lid wiring harness. 
Audi A4 in Iowa, United States
Mar 2010 - Dec 2013
Dec 2013

44000 mi

US $475
Right motor mount leaking fluid. 
Audi A4 in South Carolina, United States
Mar 2010 - Apr 2010
Apr 2010

48000 mi

US $5600
Car overheated. Long block replaced by dealer at owner expense at 49,000 miles (post warranty). Transmission was slipping and displaying a major error indication on the cluster. Quote was $2,700 for repair of sensor and linkage belt. This is the worst car I have ever owned. 
Audi A4 in British Columbia, Canada
Sep 2009 - Jun 2018
Jun 2011

21700 mi

C $750
wheel bearings 
Sep 2016

39060 mi

C $900
defective fuel pump 
Oct 2016

39680 mi

C $3000
replaced transmission control module. The code for this appeared while it was already in the shop to have the crankshaft sensor replaced and actually made its presence known after the crank sensor had been done and was being test driven. 

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2005 Audi A4 2dr Convertible

220-horsepower 3.0L V6 6-speed shiftable CVT FWD

Audi A4 in California, United States
Aug 2007 - Dec 2015
Jan 2007

21405 mi
All ignition coils replaced. Warranty. 
Oct 2007

37740 mi
Brake light bulb and tail light bulb inoperable, removed and replaced. 
Apr 2008

47977 mi
Right side brake light open circuit, remained lit. Removed and replaced bulb. Driver side wiper not touching glass, spring broken, replaced. Actuator for locking gas door broken, replaced. Glove box popped open at high speeds, hinge fixed. 
May 2008

49160 mi
Ignition coil #5 replaced. Brake light switch defective, replaced, was causing burnt bulbs. 
Jun 2008

49973 mi
Transmission control module replaced. Engine felt sluggish. 
Jun 2009

67000 mi

US $2700
Water pump leak, replaced. At same time did timing belt (due at 65k anyway). Upper front and rear control arms bushings worn. Replaced. 
Aug 2009

73000 mi

US $600
Remove and replace control module for convertible top. 
Oct 2009

73000 mi

US $150
Remove and replace coolant tank due to leak. 
Dec 2009

77000 mi

US $387
CEL illuminated and flashing. R&R spark plugs and 6 ignition coils. 
Oct 2010

85000 mi

US $2250
Y-pipe behind engine cylinder block cracked and leaking coolant. Replaced. 
Feb 2011

88000 mi

US $3700
Cylinder 5 coolant weeping, engine rumbled on start to clear coolant. Cylinder head 456 warped (probably from factory) and heating and cooling exacerbated over time, making leak worse. Replaced head. 
Sep 2011

96000 mi

US $4000
Ecu was sending erratic signals to fan control unit, which burned out and caused car to over heat, also ruined secondary ac fan. Upper control arm bushings replaced. Ac compressor replaced 
Feb 2013

130000 mi

US $2750
Transmission Control Module, filter, fluid, and seals. 
Mar 2014

151000 mi

US $3600
Coolant sensor in rear of engine leaking. Power steering lines leaking for years. Finally replaced. 
Sep 2014

157000 mi
ABS and stability control lights intermittently on. Computer control module found faulty. Decided not to repair. 
Dec 2015

167000 mi
ABS module never repaired. The car had 160++k miles on it and worth a pittance at auction due to all the issues. Couldn't ethically sell the car private party, so we just dumped it at the dealer as a $500 trade in so I wouldn't have to deal with it. 

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2005 Audi A4 2dr Convertible

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

Audi A4 in Texas, United States
Jan 2015 - Jan 2016
Feb 2015

40500 mi

US $200
traction control wasn't working 
Jun 2015

48000 mi

US $100
noisy when turned 
Dec 2015

57000 mi

US $300
the transmission was completely shot and was a full replacement 

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2005 Audi A4 / S4

Engine not specified

Audi A4 in Pennsylvania, United States
Jul 2011 - Sep 2011
Aug 2011

68000 mi

US $1000
Crossover pipe behind engine losing coolant. Parts were degraded to the point that they were leaking about a pint of fluid a week. Leak was the worst as the engine cooled. 
Audi A4 in Washington, United States
Nov 2011 - Jan 2012
Jan 2012

US $550
Starter replacement. Symptom: turning key to start, but no start, no sounds, no nothing. 
Audi A4 in Colorado, United States
Sep 2011 - Nov 2011
Oct 2011

78000 mi

US $3700
dual flywheel mass failure. 
Nov 2011

78000 mi

US $500
window motor failed. 

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2005 Audi A4 / S4 4-door

turbocharged 4-cylinder manual AWD

Audi A4 in Sweden
May 2010 - Jul 2018
Jul 2015

99200 mi

$35
Problem with crankcase poison sensor.(G28) 

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2005 Audi A4 / S4 4-door

4-cylinder automatic 2WD

Audi S4 in Singapore
Feb 2011 - Jun 2012
Mar 2011

48360 mi

$50
Ignition coil unserviceable on cylinder 3. Coils on all cylinders replaced 
Sep 2011

53940 mi

$500
electrical window motor on front left side u/s 

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2004.5 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 6-speed manual AWD

Audi A4 in Arizona, United States
Mar 2007 - Apr 2009
Dec 2007

48500 mi
Right front inner CV Boot, Left rear outer CV Boot, Valve Cover Gasket. All covered under last days of warranty. (warranty expired 12/24/07) 
Jun 2008

51000 mi

US $85
Turbo inlet hose (aka TIP) torn and letting in un-metered air. Replaced with a spare. 
Sep 2008

54000 mi

US $64
Driver's front inner CV boot was torn. Shop replaced boot with new one. Engine speed sensor failed; new sensor ordered from dealership and self-relpaced. 
Mar 2009

57000 mi

US $725
3rd Gear synchronizer for manual transmission wore out. (Grinding in 3rd gear) Transmission removed, transmission rebuilt with new parts, transmission re-installed. All self-repair. Cost to repair includes cost of special tools purchased. 

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2004.5 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

Audi A4 in Arizona, United States
Apr 2013 - Jun 2018
Jun 2013

54000 mi

US $150
Replaced original battery! 
Nov 2014

57000 mi

US $1550
Transmission output speed sensor bad. Replaced Transmission Control Unit. Dealer covered all but $200 since it was just a month out of the 10 year extended warranty. Replaced timing belt. It was 10 years old and cracked from the Arizona heat. 
Sep 2017

67000 mi

US $600
Car was intermittently overheating. Replaced thermostat assembly. 
Jun 2018

71 mi

US $1200
Replaced rear cooling manifold which was leaking, along with necessary hoses. 

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2004.5 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual FWD

Audi A4 in California, United States
Mar 2009 - Jun 2018
Apr 2009

52000 mi
fuel pump was making a loud humming noise which was diagnosed to come from the rear passenger side. dealer replaced it no problem, was recalled on 03 models so not surprising to see it happen on 04.5's window regulator broke so a new assembly had to be ordered. can be found for roughly $120 online from genuineaudiparts.com, I believe is the site. easy DIY from www.audizine.com/forum. not a big deal 
Jan 2012

111200 mi

US $1200
Had to replace the steering rack due to loose steering symptoms. A clunk was heard when quickly turning the steering wheel counter clockwise meaning 1 side of the rack was damaged. 
Jan 2014

83800 mi

US $100
Coolant flange is leaking. Observed when coolant levels dipped low after refilling. Common problem and may even be a wear item due to seal failing. 
Dec 2014

117000 mi

US $118
vacuum system was malfunctioning causing high vacuum leading to low oil pressure at low RPM 
Oct 2015

128500 mi

US $80
Previous coolant flange repair was not successful and it was still leaking. Replaced yet another time, hopefully stops coolant leak. 
Apr 2016

135500 mi

US $600
Water pump was leaking so I replaced pump, tensioner, and timing belt. Replace A/C compressor, drier, and restrictor due to seized A/C compressor. 
Jul 2017

152000 mi

US $300
Broken outer CV joint 

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See TrueDelta's information for all Sedans, Wagons, and Convertibles.
See TrueDelta's information for all Audi models.

2005 Audi A4 / S4 Repair Histories

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2005 Audi A4 / S4 problems occur, check out our car reliability stats.