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Damage to vacuum pumps through Incorrect Assignment

Incorrect vacuum pump assignment often occurs due to a change of cylinder heads in the VW T4 engine with the code letter AAB. If an incorrect pump is installed, claims cases will not be recognised.

ATTENTION If an incorrect pump has been mounted, this will lead to breakage of the pump housing (see Fig. 1) during the initial engine start following installation, or even to breakage of the camshaft – and therefore to severe and expensive engine damage.