Problems · NHTSA complaints
2001 Audi A4 problems
Owners filed 130 complaints about the 2001 Audi A4 with NHTSA between Dec 2000 and Mar 2022. The most-cited component is electrical system (35).
Complaints
130
Filed with NHTSA
Crashes
5
Reported by owners
Fires
9
Reported by owners
Injuries
1
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Electrical system35
- Engine and engine cooling30
- Service brakes, hydraulic27
- Air bags10
- Power train5
- Exterior lighting3
- Suspension3
- Steering3
- Visibility3
- Engine2
- Seats2
- Service brakes, electric2
- Fuel system, other2
- Service brakes, air2
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Oct 27, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
1
9
12
26
12
15
4
11
9
8
10
4
3
1
2
0
1
0
0
1
0
0
1
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2000 | 1 |
| 2001 | 9 |
| 2002 | 12 |
| 2003 | 26 |
| 2004 | 12 |
| 2005 | 15 |
| 2006 | 4 |
| 2007 | 11 |
| 2008 | 9 |
| 2009 | 8 |
| 2010 | 10 |
| 2011 | 4 |
| 2012 | 3 |
| 2013 | 1 |
| 2014 | 2 |
| 2015 | 0 |
| 2016 | 1 |
| 2017 | 0 |
| 2018 | 0 |
| 2019 | 1 |
| 2020 | 0 |
| 2021 | 0 |
| 2022 | 1 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Electrical system
35 reports4 fires
“THE INSTRUMENT CLUSTER 99% CANNOT BE READ DUE TO THE LCD DISPLAY FADING. HAVE DONE MULTIPLE SEARCHES AND 9 OUT OF 10 PEOPLE HAVE THIS SAME EXACT ISSUE. AUDI NEEDS TO STEP UP AND TAKE RESPONSIBILITY FOR THIS ISSUE. THIS HAS BEEN AN ONGOING ISSUE AND NEEDS TO BE FIXED. THIS HAS BEEN A HUGE PAIN FOR ME BECAUSE SOMETIMES MY CAR WILL BEEP AND DISPLAY SOMETHING ON THE LCD SCREEN BUT BECAUSE IT'S FADING I HAVE NO CLUE WHAT IT'S TELLING ME. I DON'T WANT TO BE DRIVING AND SOMETHING LIFE THREATENING HAPPEN BECAUSE OF A MISSED MESSAGE BECAUSE THE LCD SCREEN IS BROKEN. FIX THIS BEFORE PEOPLE GET HURT AND START FILING LAWSUITS. *TR”
Engine and engine cooling
30 reports3 fires1 related recall
“2001 AUDI A4 WITH TIMING BELT FAILURE AND REPAIR. CONSUMER STATES THAT THE TIMING BELT REPAIR DID NOT LAST AND HIS VEHICLE COMPLETELY FAILED ON THE HIGHWAY. CONSUMER WAS THEN INFORMED OF AN OIL SLUDGE ISSUE. *KB UPDATED 10/19/11.”
Service brakes, hydraulic
27 reports1 crash
“TL* THE CONTACT OWNS A 2001 AUDI A4. THE CONTACT STATED THAT THE ABS WARNING LIGHT WAS ILLUMINATED ON THE INSTRUMENT PANEL AND THE BRAKE WARNING LIGHT WAS FLASHING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSTICS WHERE THE MECHANIC ADVISED THE CONTACT THAT THE ECU MODULE WOULD HAVE TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 112,000.”
Air bags
10 reports2 crashes1 related recall
“The contact owns a 2001 Audi A4. The contact stated that upon closing the driver's side door, her husband heard a loud gun-like sound and he noticed that the passenger-side curtain air bags had deployed. There were no warning lights illuminated. The contact's husband cut the curtain air bags and drove the vehicle to his residence. The dealer was not notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 180,000. The VIN was not available.”
Power train
5 reports1 fire
“1. WE WERE STUCK IN TRAFFIC ON AN INCLINE FOR A PERIOD OF APPROXIMATELY 5 TO 10 MINUTES SLOWLY APPROACHING THE CALDECOTT TUNNEL (CAL. HIGHWAY 24-EAST BOUND) WHICH WAS BACKED UP. I WAS REQUIRED TO PUSH OUR MANUAL CLUTCH IN AN OUT REPEATEDLY DURING THE BACKUP, BUT WAS VERY CAREFUL NOT TO "RIDE" THE CLUTCH. 2. TWICE IN A PERIOD OF 12 MONTHS, THE SPECIAL "DUAL CLUTCH" FLYWHEEL AND CLUTCH ASSEMBLY BEGAN TO CATCH FIRE. IN THE FIRST INSTANCE, THE CAR BECAME INOPERATIVE AND HAD TO BE TOWED. IN THE SECOND INSTANCE I WAS ABLE TO GET OFF THE FREEWAY TO PREVENT FURTHER DAMAGE AND DANGER, BUT THE CAR WAS AGAIN INOPERATIVE. IT IS UNDOUBTEDLY THE DEFECTIVE FLYWHEEL DESIGN WHICH IS CATCHING FIRE SINCE THE CLUTCH IN THE FIRST INSTANCE HAD JUST BEEN REPLACED. 3. IN BOTH INSTANCES WITHIN THE 12-MONTH PERIOD, THE ENTIRE FLYWHEEL AND CLUTCH SYSTEM HAD TO BE REPLACED EVEN THOUGH THE CLUTCH WAS STILL OPERATIVE. THE EXPENSE WAS APPROXIMATELY $3000 FOR EACH REPAIR SINCE AUDI CLAIMED THIS WAS "DRIVER ERROR." (THE REPAIR PARTS ARE AVAILABLE.) THIS IS A PREPOSTEROUS CLAIM SINCE I HAVE BEEN DRIVING MANUAL TRANSMISSION VEHICLES SUCCESSFULLY FOR 40+ YEARS WITHOUT HAVING SIMILAR PROBLEMS AS…”
Exterior lighting
3 reports1 related recall
“IN 2007 XENON HEADLIGHTS DROPPED/DIPPED HEADLIGHT LEVEL SENSOR REPLACED AND LIGHTS APPEARED TO WORK CORRECTLY. IN 2011 THE SAME PROBLEM OCCURRED AGAIN. HEADLIGHT LEVELING SENSOR AND WIRING HARNESS REPLACED. APPEARS TO BE WORKING OK. DRIVING WITH THE HEADLIGHTS AIMED INCORRECTLY IS A DANGEROUS DRIVING CONDITION. IT APPEARS THAT THERE IS A COMMON DESIGN FLAW WITH THE XENON HEADLIGHTS. *TR”
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 27, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.