Engine Number

WARNING: This page is about a different car, the 2015 Audi A7 Quattro and 2014 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

The engine number ("engine code" and "serial number") is located on the left side in the front under the high pressure pump toothed belt -arrow-.

Fig 1: Identifying Engine Number
Courtesy of AUDI OF AMERICA, LLC
In addition, a sticker with "engine code" and "serial number" is affixed to the intake manifold.
Engine codes beginning with "C" are four-digit.
The first three digits of the engine code stand for displacement and the mechanical structure of the engine. They are stamped in the cylinder block, including the serial number.
The fourth digit describes the engine output and torque and depends on the Engine Control Module (ECM).

NOTE:

The four digit engine code is on the type plate, vehicle data label and engine control module.

For the location of the type plate and vehicle data label, refer to appropriate FLUID CAPACITY information .