1991 Audi 100 Engine Code And Serial Number DIY Guide

The following schematic diagram shows you with a DIY guide for knowing your 1991 Audi 100 Engine Code and Serial Number. The Audi 100 are mid-sized automobiles made between 1968 and 1994. In year 1991, it was known to be the Audi C4 which has a heavily revised of the previous C3 for the introduction of a 2.8 L, 90-degree, SOHC 12v, V6 engine (source: wikipedia).

So if you need to locate the engine code and serial number of your Audi 100-C4 by yourself, they are stamped on right hand at rear of cylinder head as shown in the schematic above.