Verdict · NHTSA data
Limited data — recalls on file
NHTSA has just 3 complaints on file for the 1991 Audi 90 — too few to judge reliability from owner reports alone — but 2 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work.
3
NHTSA complaints
2
Recalls
2
Investigations
0
Crash-involved
1
Fires reported
0
Injuries
0
Deaths
—
NCAP overall
| Component | Complaints | Share | vs prior year |
|---|---|---|---|
| Electrical System | 1 | 33% | ▼ down |
| Engine | 1 | 33% | new |
| Seat Belts | 1 | 33% | new |
2 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.
Defect
VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME AIR BAG SENSORS DO NOT COMPLY WITH AUDI'S DURABILITY STANDARDS OVER THE LIFETIME OF THE VEHICLE.
Consequence
IN THE EVENT THE SENSOR SHOULD MALFUNCTION, THE AIR BAG RESTRAINT SYSTEM CAN INADVERTENTLY DEPLOY. DEPLOYMENT OF THE AIR BAG RESTRAINT SYSTEM WITHOUT WARNING COULD CAUSE A DRIVER TO LOSE VEHICLE CONTROL.
Remedy
DEALERS WILL REPLACE THE AIR BAG SENSOR CONTROL MODULE.
Defect
THE DIFFERENTIAL OIL OF THE TRANSAXLE IS LOST OVER TIME DUE TO EVAPORATION. LOW OIL LEVELS CAUSE PREMATURE BEARING AND GEAR WEAR AND EVENTUAL FAILURE OF THE DIFFERENTIAL.
Consequence
IN THE EVENT OF FAILURE, THE VEHICLE'S DRIVE WHEELS COULDLOSE POWER. IN EXTREME CIRCUMSTANCES, THE FRONT WHEELS LOCK, CAUSING RAPIDDECELERATION RESULTING IN POSSIBLE LOSS OF VEHICLE CONTROL AND AN ACCIDENT.
Remedy
DRAIN AND REPLACE THE DIFFERENTIAL GEAR OIL WITH OIL HAVING HIGHER PERFORMANCE CHARACTERISTICS.
Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.
“THIS FUEL LINE LEAK WAS DISCOVERED BY MY MECHANIC DURING AN INSPECTION OF THE EXHAUST. THE LINE IS LOCATED BETWEEN A HEAT SHIELD AND THE BODY OF THE CAR. MECHANIC MENTIONED THAT THERE IS THE POSSIBILITY OF FUTURE LEAKS IN THE SAME AREA. I PAID $100 FOR A REPAIR OF THE LINE. THERE IS AN AUDI 20V…”
“WHILE DRIVING, ELECTRICAL SYS. WIRE HARNESS FRONT SHORTED, CAUSED FAN TO BURN OUT, VEHICLE OVERHEATED AND CAUGHT FIRE. TT”
The record is thin — 3 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 2 recalls should be verified as completed.
Yes — NHTSA lists 2 recall campaigns affecting the 1991 Audi 90. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.
NHTSA opened 2 investigations into this model year; all are now closed.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.