Engine Number

WARNING: This page is about a different car, the 2011 Audi Q7, 2010 Audi Q7, and 2009 Audi Q7. 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: Locating Engine Number Plate (Engine Code And Serial 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 4th digit describes the engine output and torque and depends on the engine control module.

NOTE:

The engine number is covered by the ribbed belt idler roller. Remove the ribbed belt idler roller, refer to LEFT RIBBED BELT IDLER ROLLER, REMOVING AND INSTALLING .

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 Maintenance Booklet 406.