This manual for the 1985 Audi 4000 is built around the S trim's own specifications, so the torque values, fluid capacities, and repair sequences inside match what Audi published for this exact car rather than a generic 4000-series approximation.
Engines covered
- 1.8L inline-four — SOHC, naturally aspirated, gasoline
- 2.2L inline-five — naturally aspirated, gasoline
Body styles covered
- 2-door sedan
- 4-door sedan
Trims covered
- S
Known issues on the 1985 Audi 4000. Two recalls are on federal record for this model year. The first covers the axle assembly: differential oil is lost over time through evaporation, and low oil levels lead to premature bearing and gear wear, which in extreme cases can lock the front wheels and cause rapid deceleration and loss of vehicle control. The second covers vehicle speed control: excessive wear of the idle stabilizer can cause idle fluctuations and unsatisfactory driveability. Owners have filed 1 complaint for the year, and no technical service bulletins are logged. The factory diagnostic and repair procedures behind both systems are here.
From a differential oil check to sorting out an erratic idle, it keeps you on the OEM procedure and the correct specification for your specific 1985 4000.
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.
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 ACC
DRAIN AND REPLACE THE DIFFERENTIAL GEAR OIL WITH OIL HAVING HIGHER PERFORMANCE CHARACTERISTICS.
EXCESSIVE WEAR OF IDLE STABILIZER COULD CAUSE IDLE FLUCTUATIONS.
IDLE FLUCTUATIONS COULD RESULT IN UNSATISFACTORYDRIVEABILITY.
REPLACE IDLE STABILIZER.
FUEL PUMP BROKE, CAUSING VEHICLE TO CATCH ON FIRE WHILE GOING 60MPH ON HIGHWAY. VEHICLE WOULDN'T DOWNSHIFT, AND ACCELERATOR PEDAL FAILED. ALSO, BATTERY LIGHT ILLUMINATED JUST BEFORE VEHICLE STAL
