2004 Audi A6 Audi A6 2004

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2004 Audi A6 repairs by problem area

Engine (38%)

Transmission and Drivetrain (20%)

Brakes and Traction Control (0%)

Suspension and Steering (16%)

Electrical and Air Conditioning (16%)

Paint, Rust, Leaks, Rattles, and Trim (3%)

Other (7%)

Chart based on 128 repairs.
See TSBs and recalls for the 2004 Audi A6.

2004 Audi A6 repair cost distribution

$2500+ (6%)

$1000 - $2499 (12%)

$500 - $999 (27%)

$100 - $499 (29%)

< $100 (27%)

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

Chart based on 105 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2004 Audi A6

Engine not specified

Audi A6 in Ontario, Canada
Aug 2011 - Sep 2012
Sep 2011

155000 mi

C $2500
Suspension leaked and need recharge plus new shocks. Two Catalytic converters replaced plus rewriting for O2 sensors. 
Sep 2012

177320 mi

C $6000
First and second gear needed repaired. Had to rebuild the transmission. 
Audi A6 in New Jersey, United States
Feb 2013 - Mar 2013
Mar 2013

132000 mi

US $2300
Check engine light came on, needed a new torque converter. Extensive job. Took 3 days to fix the problem. 
Audi A6 in California, United States
Nov 2009 - Mar 2010
Dec 2009

56000 mi
Extensive replacement of gaskets on the engine, seal at the input shaft of the transmission replaced, repairs made to cure excessive oil burning noted by owner. 

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2004 Audi A6 4dr Wagon

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

Audi A6 in Connecticut, United States
Apr 2012 - Jun 2018
Feb 2013

90500 mi

US $200
Left CV boot (original) has a tear in it. The CV boot was replaced with an Audi/OEM part and serviced. 
Apr 2014

97000 mi

US $275
Replaced original CV joint boot due to a tear. 
Dec 2014

102000 mi

US $125
Check engine light. Computer reported engine running too lean. Problem caused by vacuum leak. Repair required new gasket. 
Mar 2017

117500 mi

US $256
Solder joint failure in amplifier in sub-woofer. Purchased OEM NOS part on Amazon for $50.00. Technician replaced the sub-woofer assembly. 
Jun 2017

122000 mi

US $250
Lower radiator (original, 13+ years old) hose looked a bit crusty Right-front woofer speaker needed to be repaired. New speaker purchased online for $32. 
Dec 2017

128000 mi

US $1644
Replace right front, inner & outer CV Boot Drive belt tensioner failed. (original part 13.5 years old) 
Feb 2018

128000 mi

US $900
One of two original (13.5 year old) flex-pipe failed. Replace both. 
Jun 2018

129750 mi

US $265
Battery was 6.75 years old 
Audi A6 in Connecticut, United States
Apr 2004 - Jun 2018
Sep 2004

500 mi
replace gas cap and evaporative purge canister after check engine light comes on, 2 separate incidents, both repaired correctly 
Aug 2006

16000 mi
replace driver's side visor after the insertion clasp cracked and the visor would not stay snapped into place 
Oct 2012

59200 mi

US $90
replaced brake switch 
Nov 2013

66000 mi

US $500
center differential leaking, needed repair 
Sep 2015

74000 mi

US $3000
Replaced catalytic converters, removed ones were fracturing. I was shown the fractures, car is 11 years old. 
Jun 2017

83000 mi
Replaced split CV Boot 4 wheel alignment and 4 tires balanced 
Audi A6 in Massachusetts, United States
Aug 2014 - Nov 2015
Nov 2014

98700 mi
Coolant leaking from water pump; replaced water pump seal. 
Feb 2015

102000 mi

US $330
Rear stub axle differential seals leaking. Left and right axle seals replaced. 
Aug 2015

106300 mi

US $65
Car had pronounced exhaust leak. Diagnosed both flex pipes as rusty and disintegrating. Replaced both flex pipes. Water leaking into front passenger footwell. Diagnosed deteriorated gasket on cabin air filter plastic surround/tray. Replaced with new surround/tray. 
Sep 2015

108000 mi

US $400
Car was leaking oil. Replaced 3 cam adjuster gears to remedy the leak. Car had broken engine mount. Car leaking fluid from washer fluid tank. 
Nov 2015

108000 mi
Washer fluid leak never fixed. 
Audi A6 in South Carolina, United States
Dec 2014 - Jan 2015
Jan 2015

US $600
Developed a almost impossible to find coolant leak 

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2004 Audi A6 4dr Sedan

300-horsepower 4.2L V8 5-speed shiftable automatic AWD

Audi A6 in California, United States
Nov 2009 - Jun 2011
Jul 2010

87000 mi

US $30
replaced the temperature control module - temperature gauge in dash not working, $30 part, 30 minute repair done by me in my garage 
Audi A6 in Pennsylvania, United States
Jul 2015 - Dec 2016
Jul 2015

86000 mi
secondary air pump and combination valve 
Oct 2016

96700 mi

US $250
Combi valve 
Audi A6 in Pennsylvania, United States
Apr 2009 - Mar 2010
Dec 2009

77000 mi

US $600
rear shocks went out. 

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2004 Audi A6 4dr Sedan

265-horsepower 2.7L V6 6-speed manual AWD

Audi A6 in Illinois, United States
Apr 2010 - Jun 2012
Apr 2011

49000 mi
Secondary Air Pump Cabin blower squeaky, replaced blower. 
May 2011

49000 mi

US $750
Replaced both front CV Boots. 
Jun 2011

50000 mi

US $620
Secondary Air Code Both Banks, P0491. Vacuum broken under intake manifold at plastic T. Disassemble back of intake to repair. 
Jan 2012

54000 mi

US $40
Coolant temperature sensor faulty. 
Mar 2012

54000 mi

US $13
Windshield fluid leaking from tank near pump. Replaced grommet part #443955465. Broke plastic connector to pump during reassembly, bought rubber tube and connector from Advance Auto Parts to reassemble. 
Jun 2012

54000 mi

US $1350
Replaced steering rack. 

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2004 Audi A6 4dr Sedan

265-horsepower 2.7L V6 5-speed shiftable automatic AWD

Audi A6 in Colorado, United States
Nov 2009 - Mar 2010
Jan 2010

US $270
Hard start 
Audi A6 in Washington, United States
Apr 2009 - Dec 2015
Jan 2011

59800 mi

US $520
Both front CV Joint Boots were found to have split. Both front Axle Assemblies were removed, inspected, and re-installed with new boots fitted. Center Console lid hinges failed. Dealer estimated $257 to replace. 
Nov 2012

84200 mi

US $250
Rear prop shaft seal was leaking and was replaced. 
Apr 2014

95200 mi

US $1500
Valve cover gaskets were leaking. Both were replaced along with the Chain Tensioner Gaskets, and Cam Caps. Since the top-end of the engine was opened, the Spider Crankcase Breather Hose Assembly was also replaced. During cooling system inspection, it was discovered the coolant overflow tank (plastic) was beginning to crack. Tank was replaced. 
Apr 2015

99300 mi

US $100
Coolant Temp Sensor in cylinder head replaced. Recommended by mechanic, don't know why. Trunk not locking. Trunk latches properly, and will trigger alarm when opened (if car is locked), but the trunk itself will not lock. 
May 2015

99000 mi

US $265
Trunk not locking. Trunk would latch and trigger the alarm when opened (when car was locked) but not lock. This had been a long-term problem that literally fixed itself the day we decided to have it diagnosed. Had latch replaced anyway. 
Audi A6 in Pennsylvania, United States
Apr 2009 - Jun 2014
Aug 2009

48000 mi

US $85
Check engine light on, noticed no difference in driving the car. Computer reported standard systems check as "OK". Scheduled an appointment with dealer, who claimed a problem with the engine exhaust valves. Valves replaced under CPO warranty. 
Apr 2010

50000 mi

US $50
Turn signal bulb burned out in instrument cluster. Dealer stated bulb could not be replaced, new instrument cluster required. Repair covered by certified warranty. 
Mar 2012

55000 mi

US $92
CEL from reported intermittent evap leak. Dealer unable to find any issue, cleared code. 
Apr 2013

60200 mi

US $180
Engine heat sensor failed causing CEL. Bad wiring harness led to starting problems and one stall immediately after starting. Dealer replaced sensor and harness. 
Audi A6 in Illinois, United States
Apr 2009 - Feb 2011
May 2009

100000 mi
Coil pack failed, threw CEL. Car driveable, but just barely - limped to dealership for repair 
Sep 2009

107000 mi

US $40
Coil pack failed. 
Audi A6 in California, United States
Feb 2015 - Sep 2018
Sep 2016

125000 mi

US $120
New coolant reservoir 
Oct 2016

129000 mi

US $1000
Transmission gasket replaced 
Mar 2017

133000 mi

US $1624
replaced entire front upper and lower control arms/bushings and assembly with Audi OEM parts 
Nov 2017

134837 mi

US $204
original cam position sensors failed causing CEL and fault code. replaced both banks with OEM sensors, original coolant temp sensor failed causing fault code and CEL. replaced with OEM part 
Sep 2018

138000 mi

US $2100
slight water coolant leak likely due to failed thermostat housing. T belt was less than 20k miles old. replaced all of the original hoses with OEM parts Power steeting pump hose replaced with OEM hose 
Audi A6 in California, United States
- Apr 2008
Apr 2008

45000 mi

US $250
tie rod end link 
Audi A6 in California, United States
- Jan 2007
Jan 2007

45000 mi
turbo cooling pump 
Audi A6 in New York, United States
Jun 2015 - Mar 2018
Jun 2015

170000 mi

US $530
Original fuel pump and fuel filter was replaced. Car would have problems starting after engine was warm. Actually in April. Voltage meter came on and brought it to a shop to test the alternator. Alternator was indeed failing and had it replaced. 
Mar 2016

179000 mi

US $300
Replaced original aux coolant pump that is located under manifold. 
Audi A6 in Illinois, United States
May 2011 - Jan 2012
Jan 2012

87000 mi

US $600
Alternator. 
Audi A6 in New York, United States
Oct 2011 - Jun 2016
Dec 2013

102000 mi

US $600
Fuel pump failed and had to be replacd 
Jan 2014

93300 mi

US $450
Had to get Radiator replaced 
Feb 2014

104000 mi

US $600
Oil Leaking, Gasket had to be replaced Strut Coil Spring broke, replaced 
Apr 2016

125000 mi

US $1500
Engine Oil leak 
Audi A6 in Texas, United States
Nov 2009 - Mar 2010
Dec 2009

135000 mi

US $5000
Replaced Turbos. 
Audi A6 in New York, United States
Oct 2010 - Jan 2017
Nov 2010

37000 mi

US $300
Took front wheels off for balancing. Inside of right hand wheel full of grease. Yet another blown CV Boot. Mechanic offered to replace the boot, but instead replaced the half axle with allegedly OEM parts. 
Mar 2011

38000 mi

US $700
Broken passenger side upper and lower control arm. Replace. 
Feb 2012

41200 mi

US $450
Replace 
Jul 2015

49000 mi

US $1450
Replace upper control arm bushings 
Aug 2015

49300 mi

US $725
Replace front struts with OEM 
Mar 2016

50000 mi

US $600
Replace lower control arms OEM parts  
Jan 2017

55000 mi

US $850
Warn rear shock absorbers. Rough ride. Pot holes upset direction when cornering at speed.rnrnReplace rear Shock absorbers with dealer supplied OEM parts CV Axle worn and noisy. Replace both CV Axles. 
Audi A6 in North Carolina, United States
Apr 2009 - Nov 2016
Sep 2016

140000 mi

US $3500
$1800 torque converter rebuilt $400 CV joint replacement Electrical system failure due to water damage from windshield leak 
Nov 2016

140000 mi
Electrical problems caused by water leak never fully sorted out. Mechanic now helping me sell the car. 
Audi A6 in Tennessee, United States
Sep 2009 - Jun 2011
May 2010

63000 mi

US $1400
Starter failed, car would not start. New starter installed. Recall items(coil packs)replaced by dealer at n/c. 
Audi A6 in New Jersey, United States
Sep 2009 - Jun 2011
Mar 2010

57495 mi

US $54
Cam adjustment and valve cover seals. CAM ADJ & VALVE COVER SEALS 

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2004 Audi A6 4dr Sedan

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

Audi A6 in California, United States
May 2009 - Sep 2014
Sep 2009

35000 mi

US $375
Left front drive boot torn. Replaced. 
Mar 2010

39000 mi
Emission control module in CVT transmission replaced under 7 year 70,000 mile Emission warranty. 
Oct 2010

42000 mi

US $713
Broken front motor mount. Completely separated. Replaced both front motor mounts. 
Jan 2012

54300 mi

US $1320
Power Steering Pump defective. Replaced power steering pump. 
Oct 2013

57200 mi

US $2300
Coolant sensor leak/coolant migration to ECM All replaced 

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2004 Audi A6 4dr Sedan

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

Audi A6 in Indiana, United States
Nov 2009 - Jun 2011
Dec 2009

61000 mi
2. Valve cover gasket needed to be replaced 
Audi A6 in Utah, United States
Oct 2009 - Aug 2013
May 2010

65000 mi
transmission fluid leak, replaced gasket transmission fluid leak, replaced gasket  
Feb 2013

87000 mi

US $800
Replace right boot 
Audi A6 in Ohio, United States
Jul 2013 - Jun 2015
May 2015

174400 mi

US $2500
the exhaust system had to be replaced 
Audi A6 in New York, United States
Nov 2009 - Mar 2010
Dec 2009

68000 mi

US $60
My engine was misfiring, so I had it towed and all it needed was a new coil. 
Audi A6 in Georgia, United States
Oct 2010 - Mar 2016
Dec 2010

56000 mi

US $200
Trunk did not lock due to a broken part in trunk locking mechanism. Had to replace the mechanism. Works fine now. 
Dec 2012

71000 mi

US $638
Removed and replaced: - Rear pads and rotor, and; - driver-side outer CV boot. Also cleaned up the areas 
Audi A6 in Missouri, United States
Nov 2010 - Oct 2011
Mar 2011

40000 mi

US $259
Washer fluid system was leaking washer fluid. Dealer replaced washer fluid pump.  Brought vehicle back two weeks later because it was still leaking. Dealer discovered a crack in the reservoir. I chose not to repair it as yet. Washer fluid pump was leaking washer fluid. 
Jun 2011

45000 mi

US $957
Washer fluid leak was determined to be faulty seals for headlight washers. I requested that they be disconnected as Service Desk felt this would be a recurring issue. 
Aug 2011

45000 mi
Replaced right front CV boot. 
Oct 2011

45000 mi
Engine light was flashing. Timing belt was found to be cracked.  Suspension bars had dried bushings. Costs for repairs were too much. I traded in vehicle. 
Audi A6 in Pennsylvania, United States
Aug 2009 - Aug 2009
Aug 2009

US $495
Left rear window regulator replaced, CPO warranty, $50 deductible. Alternator and battery replaced, CPO warranty. Also had tie rods replaced, PA state inspection, $445. 
Audi A6 in Illinois, United States
Nov 2011 - Feb 2013
Feb 2013

40000 mi

US $1642
Leak in rack and pinion gear. Replaced with new part. Got vibration through steering wheel along with noise. First thought that the power-steering pump was failing. 
Audi A6 in Arkansas, United States
Jul 2012 - Aug 2012
Aug 2012

125000 mi

US $800
Rear shaft seal replaced do to leakage 
Audi A6 in New South Wales, Australia
Feb 2012 - Mar 2016
Feb 2012

49600 mi

A $630
Inefficient cooling and leaking into rear passenger footwell. Regassed, resealed, changed filter 
May 2012

54560 mi
Front end CV covers were cracked, replaced by Euro specialist. Problem was identified previously during a service, retruned car when parts arrvived Indicator lights stay lit when turning, intermittent problem over a few weeks. Mechanic said to give the hazard light button a smack next time it happens. Hey presto - all good for now! 
Oct 2012

60320 mi

A $100
Car failed to start, thought alternator had failed as after jumped stalled in 5 mins. Turned out to be a coroded positive battery lead. 
Apr 2013

67880 mi

A $220
leaking water washer reservoir. had repaired whilst in for a service, charged 2 hours of labour in addition to service 
Oct 2013

72600 mi

A $110
inner reverse sensors going off with no object. Found to be picking up the towbar, unable to adjust the direction of sensors. Problem still occurs intermitently 
Jan 2015

79100 mi

A $1000
Shudder through body and steering wheel. Replaced all front control arms. Improved, but not entirely fixed. Control arm kit from Vaico a poor after market kit. Need to fit new lower control arms after 1,000km. Quote at $1700 
Jan 2016

87280 mi

A $1400
Alternator failed - expensive part in AU! 
Audi A6 in New York, United States
Apr 2009 - Jan 2013
Aug 2010

79000 mi

US $750
Left CV Joint replaced 
Oct 2011

92000 mi

US $600
Wheel bearing replaced 
Dec 2011

94000 mi

US $300
Flex pipes between Catalytic converter & exhaust needed replacement. Cruise Control lever had to be replaced 

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2004 Audi A6 Repair Histories

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