This comprehensive Audi 90 Factory Service Workshop Manual is your ultimate guide to servicing and repairing your 1988-1992 Audi 90. Derived directly from the resources used by Audi dealer technicians, this manual provides detailed instructions for every conceivable repair and service procedure. From routine maintenance like oil changes to complex tasks like transmission rebuilds, this manual offers the detailed information you need to confidently work on your vehicle. This manual contains detailed diagrams, specifications, and step-by-step instructions designed to make every repair and service task accessible, empowering you to maintain and repair your Audi 90 with confidence.

The Audi 90, produced from 1984 to 1991, represented a significant shift in Audi's model lineup and offered a compelling blend of performance, luxury, and practicality. This mid-size executive car marked the brand's transition from the older, angular designs to a more modern, aerodynamic aesthetic. Built on the Audi 80 platform, the 90 featured a distinctively sloping front end with integrated headlamps, a spacious interior, and a range of powerful engine options. Designed to compete with the likes of the BMW 5 Series and Mercedes-Benz E-Class, the 90 showcased Audi's growing technological prowess, introducing features like quattro all-wheel drive, fuel-injected engines, and advanced suspension systems.

The 1988-1992 models, in particular, benefited from a mid-cycle refresh that introduced a revised front grille, larger taillights, and a more refined interior. The 90 was offered in various trim levels, ranging from the basic "90" to the sporty "90 quattro" and the luxurious "90 CS." Under the hood, options included a 2.0-liter four-cylinder engine, a 2.3-liter five-cylinder, and a powerful 2.6-liter five-cylinder for the "quattro" models. The 90's success was attributed to its well-rounded nature, offering a balanced mix of performance, comfort, and practicality. It cemented Audi's reputation for building high-quality, sophisticated automobiles and paved the way for future models like the A4 and A6, that would carry the Audi name to even greater heights in the luxury car market.