This 1990 Audi Coupe Quattro factory service and repair manual is built around the 20v two-door trim and its 2.3L inline-five (engine code 7A), so the torque values and diagnostic steps you're following are the ones Audi wrote for that exact drivetrain, not a generic five-cylinder substitute.
Engines covered
- 2.3L inline-five — DOHC, naturally aspirated, gasoline
Body styles covered
- 2-door coupe
Trims covered
- 20v
Known issues on the 1990 Coupe Quattro. One recall is on federal record for this model year, covering the airbag sensor/control module: some sensors do not meet Audi's durability standards over the vehicle's lifetime, and if a sensor malfunctions the airbag can deploy inadvertently, without warning, risking loss of vehicle control. Owners have filed 2 complaints for the year, and no technical service bulletins are logged. The factory diagnostic and repair procedures behind that system are here.
Whether you're inspecting the airbag sensor circuit or working through a routine service interval, it keeps you on the OEM procedure and correct specification for your specific 1990 Coupe Quattro.
VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME AIR BAG SENSORS DO NOT COMPLY WITH AUDI'S DURABILITY STANDARDS OVER THE LIFETIME OF THE VEHICLE.
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 CONT
DEALERS WILL REPLACE THE AIR BAG SENSOR CONTROL MODULE.
DRIVER'S SEAT BELT RANDOMLY LOOSES TENSION. THIS HAS HAPPENED OFTEN WHEN LEANING FORWARD IN AN ATTEMPT TO SEE BETTER AROUND A TURN OR AT NIGHT. SEATBELT REQUIRES MANY YANKS AND MUCH MOVEMENT TO REGAIN
FUEL INJECTORS ARE FAILING ON THE CAR, AS THEY HAVE FOR MANY OTHERS. THIS HAS CAUSED ROUGH RUNNING, VERY POOR PERFORMANCE, HIGH FUEL CONSUMPTION, ETC. I FOUND THAT AUDI NO LONGER MAKES THE INJECTORS,
