Main timing chain tensioner spring for BMW E60 (BMW original part)

Chain tensioner spring between the crankshaft and the exhaust camshaft,

For E60:
- 520 i M54
- 525 i M54
- 530 i M54

For E61:
- 525 i M54 It is strongly recommended to replace this part, which wears with time and distance and thus slackens the main timing chain
Easy replacement, with no disassembly of the timing system required
Located inside the chain tensioner