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Engine Code

Engines are identified by a 3-letter code stamped on engine. On vehicles equipped with engine code APB or ATQ, engine code is on machined surface on cylinder block, at front right cylinder bank. The engine code is also indicated on the vehicle data sticker. See Fig 1 or Fig 2 . On vehicles equipped with engine code ART, letters are located on left side of cylinder block. The engine code is also included on vehicle data label. See Fig 3.

Fig 1: Identifying Engine Code Location (2.7L - APB)
G00329565Courtesy of AUDI OF AMERICA, INC.
Fig 2: Identifying Engine Code Location (2.8L - ATQ)
G00329563Courtesy of AUDI OF AMERICA, INC.
Fig 3: Identifying Engine Code Location (4.2L - ART)
G00329564Courtesy of AUDI OF AMERICA, INC.