Main timing chain tensioner for BMW E46

Chain tensioner between the crankshaft and the exhaust camshaft,

For Saloon & Touring:
- 320 i M52 (Saloon only)
- 323 i M52
- 325 i/xi M54
- 328 i M52
- 330 i/xi M54

For Coupé & Convertible:
- 320 Ci M54
- 323 Ci M52
- 325 Ci M54
- 328 Ci M52 (Coupé only)
- 330 Ci M54

For Compact:
- 325 ti 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