Genuine BMW saucer-head (cheese-head) bolt used to adjust alternator belt tension on the adjusting bar.

Specification

• Thread: M8
• Length: 100 mm
• Head style: Saucer / cheese head
• OEM part for classic BMW alternator mounting

Fitment

Correct for:

• M40 engines
• M42 engines

Common applications include:

• E30 316i / 318i (M40)
• E30 318is (M42)
• E36 318is (M42)
• Other models fitted with M40 or M42 engines

Note: These are not the shorter M8 x 80 mm bolts used on earlier M10 / M20 / M30 / S14 / S38 engines.