The Audi B3, produced from 1986 to 1991, represents a significant era for Audi, marking advancements in design and engineering. This compact executive car, available as a sedan, coupe, and Avant wagon, was recognized for its aerodynamic styling, galvanized body for corrosion resistance, and the introduction of Audi's robust Quattro all-wheel-drive system. Offering a range of inline-four and inline-five engines, from 1.6L to 2.3L, the B3 provided a blend of performance and sophistication, competing in a premium segment with models like the BMW 3 Series and Mercedes-Benz 190E. Its engineering quality and focus on driving dynamics contributed to Audi's growing reputation in the automotive market.

This workshop service repair manual provides comprehensive guidance for the Audi 80/90 (B3) models from 1986 through 1991. It covers all essential systems, including detailed engine diagnostics and repair, fuel and ignition systems, cooling, exhaust, manual and automatic transmissions, drivetrain, suspension, steering, and braking systems. Additionally, the manual offers in-depth information on the electrical system, HVAC, body, and interior components. Included are procedures for preventive and scheduled maintenance, troubleshooting guides with diagnostic charts, and specific technical data such as torque specifications and fluid requirements, ensuring owners and technicians can effectively maintain and repair their vehicles.