Engine Number

WARNING: This page is about a different car, the 2010 Volkswagen Jetta and 2009 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Four digit engine codes were introduce in Model Year (MY) 2008.
The first three positions describes the type of engine. They are stamp onto the engine. The fourth digit describes the engine output and depends on the Engine Control Module (ECM).
The four digit engine code is on the vehicle data label, the type plate and on the ECM.
The vehicle data label is located in the customer maintenance booklet as well as at the back of the vehicle inside the spare tire wheel well or on the luggage compartment floor.

NOTE:

Vehicles for some countries do not have a data label.

The engine number ("engine code" and "serial number") are located near the engine/transmission joint -arrow-.

Fig 1: Identifying Engine Number Location
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
In addition, a sticker with the "engine code" and "serial number" is affixed to the toothed belt guard.
The engine number consists of up to nine characters (alphanumeric).
The first part (maximum 4 characters) represents the "engine code", the second part (six characters) is the "serial number".
If more than 999, 999 engines with the same engine code are produced, the first of the six characters is replaced with a letter.