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Engine Number

The first three digits of the four digit engine code describes the mechanical engine structure. They are also stamped 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 type plate, the vehicle data label and the ECM.

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

Fig 1: Identifying Engine Number Location
GWWN00-10094Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

In addition, a sticker with "engine code" and "serial number" is affixed to the toothed belt guard.

The engine code is also included on the vehicle data plate.

The engine number consists of up to nine alphanumeric characters. The first part (maximum four letters) represents the "engine code", the second (six digit) 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.