| 1 | 0 | 3 | 4 | 3 | 4 |
2004 Audi A4 / S4 / RS4 repairs by problem area
Engine (49%)
Transmission and Drivetrain (7%)
Brakes and Traction Control (2%)
Suspension and Steering (13%)
Electrical and Air Conditioning (23%)
Paint, Rust, Leaks, Rattles, and Trim (3%)
Other (2%)
Select a problem area
- Engine
- Transmission and Drivetrain
- Brakes and Traction Control
- Suspension and Steering
- Electrical and Air Conditioning
- Paint, Rust, Leaks, Rattles, and Trim
- Other
Chart based on 552 repairs.
2004 Audi A4 / S4 / RS4 electrical repair cost distribution
$2500+ (9%)
$1000 - $2499 (10%)
$500 - $999 (15%)
$100 - $499 (35%)
< $100 (32%)
Chart based on 115 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2004 Audi S4 4dr Wagon
340-horsepower 4.2L V8 6-speed shiftable automatic AWD
| 44000 mi US $180 |
AC need recharge, not under warranty |
| 57000 mi US $2000 |
AC works intermitently, Repairs $2000, Audi would pay $1000 of the repair in assistance but delaying repair. |
| 73500 mi US $100 |
Replaced front left turn signal bulb and socket, replaced key fob batteries, reprogrammed keys. To change bulb have to remove and then reinstall and re-aim entire headlamp assembly. Replaced front left turn signal bulb and socket, replaced key fob batteries, reprogrammed kets |
| 71000 mi US $275 |
replace trunk latch actuator |
| 39000 mi | Air conditioner wasn't working. The air conditioning compressor needed replacement. The work was covered under the Audi CPO warranty. While there, they also changed oil, filters and fluids. |
| 40000 mi US $50 |
Driver window regulator failed - apparently a very common problem for Audi/VW. |
2004 Audi S4 4dr Wagon
340-horsepower 4.2L V8 6-speed manual AWD
| 21700 mi C $800 |
Airbag light on. Passenger side seat airbag module replaces. Sensor connector had been previously replaced. |
| 45880 mi C $400 |
Rear latch mechanism failed; unable to close hatch. Replaced latch. |
| 65720 mi C $400 |
Battery replaced after car failed to start; reset modules as required. |
| 144000 mi US $18715 |
Alternator retrofit to adapt later model (2004 mid year change) unit. Replace Master Window Switch |
| 147500 mi US $307 |
replace interior trunk dome light assemble, troubleshoot intermittent connection |
2004 Audi S4 4dr Sedan
340-horsepower 4.2L V8 6-speed manual AWD
| 99300 mi US $750 |
Fuel gauge gives incorrect reading. Replaced fuel floaters in gas tank. Fuel reading is still incorrect, in fact, it's worse. Still attempting to repair. |
| 103300 mi | Passenger side floater was reading twice the normal Ohm rating, replaced unit. |
| 117400 mi US $600 |
Replace a/c compressor |
| 108000 mi US $1000 |
High Pressure switch failed |
| 70000 mi US $650 |
Self-diagnosed. Starter motor failed. Replaced with OEM. Messy 5 hour job so ordered part and gave it to a good local shop. Noticed a few non-critical engine oil leaks and a weeping coolant hose (clamp replaced). |
| 84000 mi US $3000 |
Failed alternator. Shredded the belt. Required replacement including tensioner. Since alternator model was only used for one year, it is no longer available so modification kit required to adapt for newer model. |
| 70000 mi US $220 |
Original OEM starter began to fail in the fall season with colder temperatures in the winter the issue was increasingly frequent. Ordered part online and installed in garage. |
| 96000 mi US $2500 |
Alternator replacement |
| 70000 mi US $2200 |
AC was not working, compressor needed to replaced & because of metal bit of the failed compressor were in the dryer it needed to be replaced as well. |
| 91000 mi US $1800 |
Delphi alternator in these cars a known weakness. Replaced with an upgraded Hitachi unit that required a couple of updates to the existing water cooling for the alternator. |
| 37000 mi US $200 |
AC compressor failure |
| 62000 mi US $400 |
o ring in system failed battery cable corroded |
| 67500 mi US $540 |
Pass front window inoperable - replaced window regulator |
| 77000 mi US $120 |
Replaced right rear window regulator |
| 77600 mi US $150 |
replace drivers front window regulator |
| 82000 mi US $110 |
Fan Broke |
| 40000 mi US $290 |
changed both driver and passenger window regulators. |
| 54000 mi US $3500 |
Began hearing a ticking noise from engine compartment. Took to several locations and found that a/c compressor had failed. It was winter so no noticeable difference was noticed. Had compressor replaced with OEM parts and systems refilled. |
| 50000 mi US $50 |
The compressor went out on the AC. In order to replace the $600 part, the bumper and other front-end parts needed to be removed. |
| 57000 mi US $125 |
My front passenger side window regulator went bad (known VW/Audi problem). The regulator was successfully replaced by me. |
| 131000 mi US $51 |
Issue was related to the Electric trunk lock release solenoid aka the actuator that opens your boot lid when you hit the trunk release button on the fob or hit the switch above the license plate. The actuator was not opening the boot lid. |
| 83000 mi US $420 |
Front passenger window regulator replacement |
| 115000 mi US $3500 |
Replaced alternator. |
| 122000 mi US $1000 |
Replaced driver window regulator due to excessive noise and inconsistent window operation. |
| 58000 mi US $500 |
Very slight water damage in driver and passenger footwell, caused damage to telematics and comfort module. Also required reprogramming. |
| 68000 mi US $150 |
Front right window regulator replaced |
| 142000 mi US $1200 |
Driver's side front window regulator needed replacement. |
| 146300 mi US $138 |
Obviously a bad fuel guage sender, but Anchor Audi (never go there again) wasted time and only ran a VAG on the dashboard gauges. Even I know that the back seat needed to be removed and an ohmmeter run across the sender contacts. Sigh... |
| 153000 mi US $508 |
Recharged A/C myself thought not clearly needed. Afterwards A/C would shut off. It turns out I had overcharged the R34, and the shop had to evac and refill the system to proper specs. |
| 158500 mi US $520 |
Fuel level sender replaced |
| 172000 mi US $520 |
Front passenger side window regulator needed replacement. |
| 173800 mi US $35 |
Had to replace front turn signal bulb socket. |
| 206000 mi | I had starter replaced due to the common problem with B6 Audis. During cold weather, the starter will not turn over. I've dealt with the problem for years, just patiently waiting for the car to start, but i decided to end the suffering. |
| 78000 mi US $3800 |
Replaced A/C compressor and all related components Replaced A/C compressor and all related components |
2004 Audi S4 2dr Convertible
340-horsepower 4.2L V8 6-speed shiftable automatic AWD
| 78620 mi C $2522 |
Airbag light stayed on constantly. |
| 29000 mi | a/c went out. a/c repair 2nd try: still does not work correctly |
2004 Audi S4 2dr Convertible
340-horsepower 4.2L V8 6-speed manual AWD
| 67000 mi | Econ button would not go off. Hole in A/C compressor. As I'd only had the car for a week, dealer paid for repair. Passenger window motor & driver's seat motor non-working when I purchased the car. |
| 74400 mi | Wire into boot lid had degraded, needed to replace wire - its the wire to the antenna in boot lid. Symptom was music system sound dropping out as the boot lid was opened and closed. Currently have battery drain issues unsolved. |
| 40000 mi US $100 |
Radio stopped working-"no antenna" came up on radio receiver. Connection between radio and antenna had to be replaced. |
| 44900 mi US $800 |
rear brake light burned out |
| 50000 mi US $175 |
Brake sensor switch failed causing ABS light to come on. |
| 55300 mi US $300 |
Nav stopped working-had to replace computer. |
| 97000 mi US $350 |
Wipers seized in pivots - corroded from salt in the winter |
| 111000 mi US $500 |
Solenoid in the starter motor was corroded and the car would not start... replaced the starter motor - (the solenoid is integral to the starter). Also replaced the Battery - since the high temperature of the engine weakened it to 60%. |
2004 Audi A4 4dr Wagon
turbocharged 170hp 1.8L I4 6-speed manual AWD
| 92000 mi | Drivers window stopped working, replaced window regulator.Radiator seeping, replaced radiator. |
| 26235 mi | rear seat belt warning light, replaced seat sensor. |
| 44231 mi | left front speaker cutting in and out. Cleaned door electrical connectors to fix. |
| 91500 mi US $1600 |
AC compressor catastrophic failure, apparantly a common problem. Fortunately I was able to buy a new compressor, receiver/dryer and seal kit for about 500 and brought it to local shop for installation(Dealer wanted over 1400 just for parts) |
2004 Audi A4 4dr Wagon
220-horsepower 3.0L V6 6-speed manual AWD
| 95480 mi C $400 |
Passenger Window motor broken |
2004 Audi A4 4dr Wagon
220-horsepower 3.0L V6 5-speed shiftable automatic AWD
| 12000 mi | headlight leveling sensor in the rear view mirror |
| 47000 mi US $500 |
driver window regulator |
2004 Audi A4 4dr Sedan
turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD
| 91140 mi | Driver side electric window stuck open and was closed with manual intervention. Part quote received from dealer exorbitantly high - still looking for cheaper alternatives |
| 92840 mi R 4000 |
AC compressor pulley broken off completely. Told that entire AC system had to be replaced - estimated cost about half the current value of the vehicle |
| 101060 mi R 10500 |
AC compressor disintegrated, was replaced together with condenser and accumulator, and whole system flush and re-gas |
| 109400 mi R 450 |
Aircon didn't work, flushed and regassed, detected leak on valve, replaced valve |
| 125400 mi R 8000 |
AC not working and indicator clears when manual override attempted. Check at mechanic, who diagnosed faulty compressor. Replaced |
| 152520 mi R 40 |
Left dim headlight blew, replaced |
| 42000 mi | Replace toggle switch to control outside mirrors. Covered under warranty |
| 28500 mi | hid bulb replacement window switch replacement under warranty |
2004 Audi A4 4dr Sedan
turbocharged 170hp 1.8L I4 6-speed manual AWD
| 151 mi US $1000 |
Replaced AC compressor |
| 86000 mi US $835 |
Airbag TSB needed completed. |
| 96720 mi C $700 |
Evaporator got damaged by a road debris |
| 176000 mi US $6 |
Alternator quit working. Determined brushes needed to be replaced. Brushes $2.00, sandpaper $4.00. |
| 110300 mi US $250 |
Drivers side aigbar ignitor code - known issue with these cars. The harness has little slack, moving seat to limits sometimes stresses harness, it loosens up causing code. Connector cleaned and reassembled. |
| 118000 mi US $90 |
Side Airbag Ignitor code again. Driver's seat. Seat removed, contacts cleaned all reinstalled. Quicker and cheaper to do this than replace harness. |
| 45000 mi | Seatbelt in back was replaced caused airbag light when engaged, also had 45,000 maintenence done for free. |
| 132000 mi US $1020 |
replaced window regulator |
| 103000 mi US $154 |
Window regulator failure Drivers front door latch micro switch failed closed Passenger side rear door latch micro switch failed open |
2004 Audi A4 4dr Sedan
turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD
| 99000 mi US $1100 |
Replacement of fuel gauge system. |
| 46000 mi US $426 |
Motor regulator malfunctioned in front drivers-side door. |
| 94000 mi US $800 |
AC not blowing cold. |
| 97000 mi US $1100 |
Front passenger window regulator and motor. Hood alarm switch. |
| 72140 mi C $70 |
I changed the drivers door window regulator myself because the dealer wanted $495 |
| 99640 mi C $150 |
drivers front window regulator failed again |
| 107960 mi C $100 |
Oil level sensor light on dash. Oil Level Sensor replaced. |
| 111600 mi C $100 |
Replaced drivers side front window regulator (2nd replacement) |
| 128000 mi C $25 |
replace brake light switch |
| 130200 mi C $54 |
Replaced left fog light bulb |
| 133300 mi C $80 |
Dead cell in the battery resulting in vehicle failed to start |
| 133500 mi C $40 |
Drivers window switch on the armrest console stopped working. Replaced console switch. |
| 140000 mi C $100 |
Passenger front window regulator failed and had to be replaced. |
| 62000 mi | Passenger front Window regulator was bad. Dealer replaced under CPO warranty |
| 85000 mi US $1500 |
Passenger side window regulator broken. |
| 64000 mi US $50 |
window motor and sunroof motor replaced |
| 53000 mi US $100 |
Windshield Wiper linkage/motor failed |
| 100000 mi US $165 |
AC needed recharged and checked for leaks. |
| 94800 mi US $220 |
Dipped headlight bulb needed replacing my cost $5 + 1hour labor. Shop quote $120 |
| 100000 mi US $62 |
passenger headlight bulb change, and brake light... total cost $10 to change myself ... bulbs from ebay / amazon |
2004 Audi A4 4dr Sedan
220-horsepower 3.0L V6 6-speed shiftable CVT FWD
| 80000 mi US $350 |
some sensor related to the xenon headlight |
| 96000 mi | Sound system had unfixable intermittent crackling and poor AM reception. |
2004 Audi A4 4dr Sedan
220-horsepower 3.0L V6 6-speed manual AWD
| 53000 mi US $5 |
Blown brake light bulb. |
| 56000 mi US $50 |
-Ground wire faulty from ECM needed to be replaced. It caused CEL light as well as engine misfire. Car stalled and needed to be towed to Audi. Extended warranty covered the tow and repair for $50 (deductable) |
| 97000 mi US $125 |
Drivers side window regulator replaced |
| 68000 mi US $55 |
Window regulator broke, happens often with this model/type of vehicle. VW's are prone to it also. |
2004 Audi A4 4dr Sedan
220-horsepower 3.0L V6 5-speed shiftable automatic AWD
| 57000 mi US $20 |
Brake switch sensor |
| 66000 mi US $220 |
AC stopped working. |
2004 Audi A4 4dr Sedan
| 168020 mi $500 |
Faulty connection to headlights |
2004 Audi A4 2dr Convertible
turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD
| 68000 mi US $50 |
refrigerant recharged |
| 83900 mi US $250 |
alternator not charging needed new one |
| 91000 mi US $400 |
Hole in condensor |
| 38000 mi | Brake switch failed causing brake lights to stay on (most of the time); caused battery to discharge |
2004 Audi A4 2dr Convertible
220-horsepower 3.0L V6 5-speed shiftable automatic AWD
| 110000 mi US $300 |
SRS - Airbag System. Seat Belt Igniter failed Srs airbag light. Diagnosed to bad connection with odbc2 computer. Replaced connector. |
2004 Audi A4 / S4 / RS4 4-door
turbocharged 6-cylinder diesel CVT 2WD
| 77000 mi £250 |
electric window winder lifter mech failed, common fault, part replaced Air conditioning was ineffective had to be vac'd out and repressurised, no leaks found. |
| 85200 mi £80 |
A/C recharged and dye added to trace leak |
See TrueDelta's information for all Audi models.
