Built from official NHTSA complaint and recall data · data through 07/14/2026
Elevated complaint levelIts most-reported problem — Engine And Engine Cooling:engine — runs 1.5× the fleet median for that category across the 2583 model-years tracked on this site.
131Complaints
3Recalls
5Crashes
9Fires
1Injured
0Deaths
Source: U.S. NHTSA complaint & recall data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
Is this problem acknowledged?
The most-reported problem — Engine And Engine Cooling:engine (10.7% of complaints) — is covered by 1 NHTSA recall campaign.
Engine And Engine Cooling:engine complaints here are 1.5× the median for that category across the 2583 model-years tracked on this site.
2 of the 6 most-reported categories on this page are backed by a recall or open investigation; the other 4 rest on owner reports alone.
Complaint category
Reports
Official status
Reference
Engine And Engine Cooling:engine
14 · 10.7%
Recalled
Recall 14E007000
Electrical System:ignition
12 · 9.2%
No official action
—
Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip
9 · 6.9%
Investigation closed
PE02008
Service Brakes, Hydraulic
9 · 6.9%
Investigation closed
PE02008
Electrical System
8 · 6.1%
No official action
—
Air Bags
8 · 6.1%
Recalled
Recall 21V470000
Recalled = an NHTSA safety recall covers this category, so a free repair exists. Under investigation = NHTSA has an open probe but no recall yet. Investigation closed = NHTSA examined it and closed the probe — this is not a defect finding; where a closed probe led to a recall we name the campaign. Not available = recall or investigation data could not be confirmed for this vehicle — it is not a “no”. Categories are matched by NHTSA's top-level component. Check your VIN at nhtsa.gov/recalls.
Complaints by component
ENGINE AND ENGINE COOLING:ENGINE14 · 10.7%
ELECTRICAL SYSTEM:IGNITION12 · 9.2%
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP9 · 6.9%
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:PADS5 · 3.8%
ENGINE AND ENGINE COOLING:ENGINE:GASOLINE4 · 3.1%
Percentages are the share of the 131 complaints citing each component; one complaint can cite several components. “Unspecified / other” is NHTSA’s own catch-all category — we show it rather than hide it.
In the event of a crash necessitating air bag deployment, the air bag may not properly protect the occupant, increasing the risk of serious injury or death. Recall repairs are free at authorized dealers.
PARK-IT: NO · PARK-OUTSIDE: NO · OVER-THE-AIR FIX: NO
A failure of the timing belt may cause the engine to shut down, potentially increasing the risk of a vehicle crash. Recall repairs are free at authorized dealers.
PARK-IT: NO · PARK-OUTSIDE: NO · OVER-THE-AIR FIX: NO
WITHOUT THE AMBER REFLECTORS, THE VEHICLE WILL BE POORLY ILLUMINATED, POSSIBLY RESULTING IN A VEHICLE CRASH WITHOUT WARNING. Recall repairs are free at authorized dealers.
PARK-IT: NO · PARK-OUTSIDE: NO · OVER-THE-AIR FIX: NO
Park itPark outside Specimen badges — shown on a recall card only when NHTSA sets the flag. None of the campaigns above carries either flag. Always check your own vehicle by VIN at nhtsa.gov/recalls.
What owners report
“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…”NHTSA complaint 10420283 — filed 08/17/2011 · ENGINE AND ENGINE COOLING:ENGINE
“I HAVE HAD TO REPLACED ALL FOUR COILS TWO (2) TIMES ON MY AUDI A.4 1.8T AND AUDI USA SAYS THIS IS NORMAL.”NHTSA complaint 10269053 — filed 05/18/2009 · ENGINE AND ENGINE COOLING:ENGINE
“THE CONTACT OWNS A 2001 AUDI A4. WHILE DRIVING APPROXIMATELY 35 MPH UPHILL, THE VEHICLE STALLED. THERE WERE NO WARNING LIGHTS ILLUMINATED ON THE INSTRUMENT…”NHTSA complaint 10235302 — filed 07/22/2008 · ENGINE AND ENGINE COOLING:ENGINE
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Complaint trend by year filed
Frequently asked questions
What are the most common problems with the 2001 Audi A4?
Engine and engine cooling:engine issues are the most-reported category, cited in 14 of 131 NHTSA complaints (10.7%), followed by electrical system:ignition (12), service brakes, hydraulic:antilock/traction control/electronic limited slip (9), service brakes, hydraulic (9). Complaints are unverified owner reports.
How many complaints does the 2001 Audi A4 have?
131 complaints were on file with NHTSA as of 07/14/2026. Of those, 5 involved a crash, 9 involved a fire, and 1 reported injuries. No deaths were reported.
Does the 2001 Audi A4 have any recalls?
Yes — 3 NHTSA safety recall campaigns, including campaign 21V470000. Recall repairs are free at authorized dealers. Check your specific vehicle by VIN at nhtsa.gov/recalls.
Has NHTSA acted on the 2001 Audi A4's reported problems?
2 of the 6 most-reported complaint categories on this page are backed by an NHTSA safety recall or open investigation; the rest are unverified owner reports. A recall means a free repair is available at authorized dealers.
Is a complaint proof of a defect?
No. Complaints are reports submitted by consumers to NHTSA. NHTSA does not verify individual complaints, and a complaint is not proof that a defect exists.
About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/14/2026.
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