Reliability, what owners report, and what it costs to keep.
AVOIR's read: running costs are the problem rather than the car itself.
Owners have filed 29 complaints with NHTSA about the 2004 Audi S4, and it carries 1 recall. These are owner allegations rather than confirmed defects, but the pattern of what people complain about is the most useful signal a used buyer has.
| Area | Complaints | Share |
|---|---|---|
| Engine and engine cooling | 10 | 34% |
| Power train | 3 | 10% |
| Engine | 2 | 7% |
| Electrical system | 2 | 7% |
| Visibility | 2 | 7% |
| Tires | 1 | 3% |
| Power train | 1 | 3% |
| Steering | 1 | 3% |
| Structure | 1 | 3% |
| Unknown or other | 1 | 3% |
Verbatim from NHTSA complaint records, trimmed for length.
HANKOOK TIRES, VENTUS S1 NOBLE 2 SPLITTING OUTSIDE SIDEWALL, CAUSED TO DEPRESSURE TIRE, WHICH CAUSED TO CRACK TIRE ON THE INNER SIDEWALL SUBSEQUENTLY LED TO MANUFACTURER CLAIM BLAME ON MY VEHICLE. THE TIRE MODEL IS UNDER
NHTSA complaint: Tires
AFTER ENGINE COOLS DOWN, TIMING CHAIN RATTLE CAN BE HEARD UPON STARTING THE CAR. CHAIN RATTLE MEANS THAT PLASTIC GUIDES OR ADJUSTERS ARE WORN, AND MIGHT GO ANY SECOND. SPOKE WITH AUDI REP ONLINE, WHICH ADVISES ME THAT TH
NHTSA complaint: Engine
XENON HEADLAMPS WIRING ALL CORRODED AND BARE WITH NO INSULATION LEFT. CHECK WITH AUDI AND THEY SAID OUR VEHICLE AND VIN IS NOT PART OF ANY RECALL. YET RCORRD-05V096-4498 IN YOUR DATABASE SHOWS A MOFIFICATION LETTER FRO
NHTSA complaint: Electrical system
TL* THE CONTACT OWNS A 2004 AUDI S4. WHILE DRIVING AT NIGHT, THE LOW BEAM HEAD LAMPS FAILED TO ILLUMINATE WITHOUT WARNING. WHILE ATTEMPTING TO THE HEAD LAMP BULBS, THE CONTACT NOTICED THAT THE WIRING WAS BURNED AND DAMAG
NHTSA complaint: Electrical system
ON SATURDAY MORNING 12/15/2014 START MY CARD AND HEARD A RATTLE NOISE ON THE ENGINE, FIRST TIME IT MAKE THAT NOISE SINCE I BOUGHT IT. ON MY WAY TO WORK I STARTED HEARING THE RATTLE NOISE AGAIN BUT THIS TIME IT WAS LOUDE
NHTSA complaint: Engine
AUDI CLAIMS THAT THE TIMING CHAIN ON THOSE VEHICLES ARE LIFETIME AND DOES NOT NEED TO BE SERVICE. UNFORTUNATE THE TIMING CHANGE TENSIONERS ARE MADE OF PLASTIC WHICH THE WEAR OUT AT ABOUT 50K MILES, CAUSING A START UP RA
NHTSA complaint: Power train
TL* THE CONTACT OWNS A 2004 AUDI S4. THE CONTACT WAS DRIVING 25 MPH WHEN THE STEERING WHEEL FAILED AND BECAME STIFF AND HARD TO TURN. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSTIC TESTING WHO CONFIRMED THERE WAS A P
NHTSA complaint: Steering
2004 AUDI S4. CONSUMER STATES VEHICLE FAILED WHILE DRIVING, ENGINE, POWER BRAKES AND STEERING LOCKED UP *TGW THE DEALER INFORMED THE CONSUMER, THE VEHICLE HAD SUFFERED CATASTROPHIC ENGINE FAILURE, WHICH WAS MOST LIKELY
NHTSA complaint: Engine and engine cooling
NHTSA lists 1 recall campaign for the 2004 Audi S4. Recalls are free to have fixed at a franchised dealer regardless of who owns the car now, but only if they were never done, so check the VIN of the specific car rather than trusting the model.
ON CERTAIN PASSENGER VEHICLES, THERE IS A POSSIBILITY OF XENON HEADLAMP COATING DEGRADATION OVER TIME. THE LUMINOUS TRANSMITTANCE OF THE HEADLAMP MAY DECREASE OVER A PERIOD OF TIME.
Risk: THIS CONDITION COULD AFFECT A DRIVER'S FIELD OF VIEW, INCREASING THE RISK OF A CRASH.
Fix: DEALERS WILL REPLACE THE LEFT AND RIGHT XENON HEADLAMP REFLECTORS FREE OF CHARGE. THE RECALL BEGAN ON APRIL 11, 2005. OWNERS MAY CONTACT AUDI AT 1-800-822-2834.
| Reliability raw | 88 | excellent |
|---|---|---|
| Longevity est. | 79 | good |
| Maintenance | 41 | below average |
| Depreciation | 67 | good |
| Performance | 72 | good |
| Efficiency | 29 | below average |
Percentile ranks against other compact cars in the catalog.
What stands behind each score for this car:
Owners have filed 29 complaints with NHTSA for this model-year, and engine and engine cooling is the most reported area with 10 of them (34%). There is 1 recall on record. Check any specific car against its VIN before buying.
AVOIR scores its reliability 88/100 (excellent) from NHTSA recall campaigns and complaint density. That figure is a raw complaint count, not yet adjusted for sales volume, so a high-volume model scores worse than it deserves.
AVOIR scores its longevity 79/100, but that figure is an estimate built from the powertrain and the brand's record, not a measurement. A 2004 car has no 200,000-mile population to observe yet, so treat it as a prior rather than evidence.
AVOIR's read: skip unless cheap, because running costs are the problem rather than the car itself. Its overall ownership score is 66/100. Condition, mileage and service history still matter more than any score, so get a pre-purchase inspection on the specific car.
Sources: NHTSA recalls and complaints, EPA fuel economy, IIHS awards, and live market listings. A score describes a model-year, not the individual car in front of you. Get a pre-purchase inspection.