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Adjusting the AC Compressor Belt Tensioner

Model: BMW Serie 7 E38, MK 3 - Years 1994-2001
Part: V-belt

Adjusting the tensioner for the AC compressor drive belt is very simple: the tensioner is a pneumatic jack mounted to the engine block via a plate that allows for adjustment. The plate has a mounting pin that acts as a pivot and a slot for adjustment. First, loosen the pin with a 10 mm wrench located in the slot. Then, use a 17 mm wrench to rotate the plate to tension the auxiliary belt. While keeping the belt tensioned, tighten the 10 mm pin to secure the tensioner.

Updated on 14 February 2026 by ScegliAuto

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