IllustrationWHILE IN RAIN ALL WINDOWS FOGGING UP FROM INSIDE, UNABLE TO DEFOG, THE A/C WILL NOT TURN ON, CHECKED FOR LEAKS - NO LEAKS OBSERVED, SPORADICALLY THE A/C TURNS ON AND OFF, VERY COMMON PROBLEM IN CARS FROM THIS YEAR, MAY CAUSE DAMAGE AND INJURY. *TR
2004 Audi S4
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
Counts are not adjusted for sales, age, mileage exposure or reporting. A lower count does not establish that a car is problem-free.
About this comparison →29Owner complaints
Model-year median: 7
1Recall campaignsView recall details →
0InvestigationsView investigation details →
Check a VIN with NHTSA ↗ Model-level counts do not show whether a particular VIN is affected or repaired.
Inspection summary
2004 Audi S4
NHTSA snapshot: September 18, 2026. 29 owner complaints · 1 recall campaigns · 0 investigations.
Counts are not failure probabilities and are not adjusted for sales, age, mileage exposure or reporting. One report may name several categories. Comparison method and limitations.
Top reported categories (up to 5)
- Engine And Engine Cooling: 12 reports
- Power Train: 5 reports
- Engine: 3 reports
- Exterior Lighting: 3 reports
- Visibility: 3 reports
Full reported-category list and vehicle report
Recall links
Check a VIN with NHTSA. Model-level history does not establish whether a particular VIN is affected or repaired.
Print the top reported categories, recall links, snapshot date and comparison limits.
How this year compares
Owner complaints by model year
Compare all S4 years →Counts vary with age, sales, mileage exposure and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
40–25K
625–50K
1050–75K
375–100K
4100–150K
0150K+
27 reports with mileage · 2 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Engine And Engine Cooling. Review the 12 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
0 crash reports1 fire reports0 injury reports
Visibility complaints
3 reports2004 S4 WIPERS STOP WORKING (STOP IN THE MIDDLE OF WINDSHIELD) IN RAIN, MOTOR WORKS SEEMS AS SOMETHING SIZED, IN SOME SITUATIONS MAY CAUSE BIG DAMAGE AND INJURY. *TR
TL*THE CONTACT OWNS A 2004 AUDI S4. WHEN THE WEATHER WAS COLD AND THE CONTACT TOOK HIS FOOT OFF OF THE ACCELERATOR, THE VEHICLE WOULD NOT SLOW DOWN. THE DEALER COULD NOT DUPLICATE THE PROBLEM. THE CURRENT MILEAGE WAS ABOUT 75,000 MILES AND THE FAILURE MILEAGE WAS LESS THAN 5,000 MILES. UPDATED 01/24/08. *LJ THE BRAKE LIGHTS WO…
Read full complaint
TL*THE CONTACT OWNS A 2004 AUDI S4. WHEN THE WEATHER WAS COLD AND THE CONTACT TOOK HIS FOOT OFF OF THE ACCELERATOR, THE VEHICLE WOULD NOT SLOW DOWN. THE DEALER COULD NOT DUPLICATE THE PROBLEM. THE CURRENT MILEAGE WAS ABOUT 75,000 MILES AND THE FAILURE MILEAGE WAS LESS THAN 5,000 MILES. UPDATED 01/24/08. *LJ THE BRAKE LIGHTS WOULD COME ON AND GO OFF. THE REAR VIEW MIRROR FELL OFF. THE COOLING FAN WOULD STAY ON AT ALL TIMES. THE DEALER REPLACED A FAULTY FAN MODULE. UPDATED
Recall campaigns
105V096000 · Exterior Lighting:headlights
Mar 15, 2005
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.
Consequence & remedy
Consequence: THIS CONDITION COULD AFFECT A DRIVER'S FIELD OF VIEW, INCREASING THE RISK OF A CRASH.
Remedy: 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.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
Defect investigations
0No exact-year investigations in this snapshot.
An investigation is not a finding of a defect, and closure does not prove a vehicle is problem-free.