For Sale: 1990 Porsche 928 S4/GT Factory Original Service Information Manual

[jaydubau]

For Sale: 1990 Porsche 928 S4/GT Factory Original Service Information Manual.

This Porsche document (WKD 496 521) highlights the technical modifications for 1990 928 S4/GT models over the 1989 928 S4/GT.

The major additions are the new Airbag System, the new Porsche Limited Slip Differential (PSD) System and the new Tire Pressure Control System (RDK).

It also contains the trouble shooting/diagnosis procedures for the above 3 major systems and more!

It has VIN, engine and transmission serial number breakdown.

There’s even a section of Maintenance Schedules for the 1990 928 S4/GT

Over 80 PAGES of information!!

I bought it new back in the late 1990’s when I bought my 1990 928 S4.

I sold the car a few years later but kept this manual since most of the information covered my 1991 928 GT. I sold that car, too, but kept the manual.

It’s in very good condition. I kept it inside with the rest of the car’s documents and never used it out in the garage.

I’m asking $49.98 OBO.

Please PM for questions.

Thanks for looking!



The RED LINES in the pictures are NOT on the paper!