Original BMW Timing Chain Tensioner for BMW 2, 3, 4, 5, 6, and 7 Series, X1, X2, X3, X4, i8, and Mini Cooper (2014–2023)

On BMW's modular B-series engines, the timing chain is held under load by this Original BMW chain tensioner. Part number 11-31-7-617-475 fits a wide range of 2014–2023 BMW and Mini models, from the 230i and 340i through the 740i, X1 through X4, and i8. BMW calls it Chain tensioner and covers the three-cylinder B38, the four-cylinder B46 and B48, and the six-cylinder B58 with this one number. The unit weighs 118 g and is made in Germany. Production started in February 2014. A timing chain tensioner applies preload to the chain so slack cannot build up. Too much slack can let the chain jump or derail and cause engine damage.

Original BMW Parts carry a 24-month parts warranty.

This number replaces 11-31-8-622-486, and BMW rates the change as exchangeable retrospectively, so it is the correct tensioner for engines that originally had the older part. Tensioners of this kind are oil fed, so check oil level and oil pressure when diagnosing tensioner problems. Typical signs of a failing tensioner include chain rattle or slap at startup and fault codes for camshaft-to-crankshaft correlation.

Technical Details

• Manufacturer: BMW (Original BMW part)
• Part number: 11-31-7-617-475
• BMW part name: Chain tensioner
• Weight: 118 g (0.3 lb)
• Production start: February 2014
• Supersedes: 11-31-8-622-486, exchangeable retrospectively
• Engines in BMW data: B38, B46, B48, and B58
• Country of manufacture: Germany
• Sold as: one tensioner
• Warranty: 24 months

Common Questions

Will this replace 11-31-8-622-486?
Yes. BMW superseded that number with this tensioner and approves it for earlier engines.

What noise points to a bad tensioner?
Chain rattle, clanking, or slap at startup is the most common sign.

PMB Performance carries the factory BMW tensioner for these B-series engines.

Fitment & Compatibility

Confirm your model year and submodel against the table below before ordering. Send your VIN and PMB Performance will confirm the fit, drawing on more than 20 years in the trade.