1988 Audi 90 Quattro Service and Repair Manual

This factory service and repair manual for the 1988 Audi 90 Quattro is built around the exact year and trim of your car, so every torque value, clearance, and diagnostic step follows what Audi actually published for the 90 Quattro rather than a generic all-Audi reference.

Engines covered

• 2.3L inline-five — SOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base

Known issues on the 1988 90 Quattro. One recall is on federal record for this model year. It covers the transaxle differential: the differential oil is lost over time through evaporation, and the resulting low oil level causes premature bearing and gear wear that can lead to differential failure, which in extreme cases can lock the front wheels and cause rapid deceleration and loss of vehicle control. Owners have filed 4 complaints for the year. The factory diagnostic and repair procedures for the differential and transaxle are in this manual.

Whether you're checking differential oil level or working through a full transaxle service, it keeps you on the OEM procedure and correct specification for your specific 1988 90 Quattro.