Drive Belts
Drive Belts
Section titled “Drive Belts”The M54 uses a single serpentine belt driving the alternator, power steering pump, A/C compressor, and water pump.
Specifications
Section titled “Specifications”- Belt: 6PK1538 (11 28 7 838 200)
- Replace every 50,000 miles or if cracked/glazed
- See DIY section for replacement procedure
Tensioner and Idler Pulley
Section titled “Tensioner and Idler Pulley”Replace every 80,000 miles or with belt if noisy. A failing tensioner causes belt squeal and can lead to belt failure.