BMW 740i xDrive Timing Chain Tensioner Replacement Cost

The average cost for a BMW 740i xDrive Timing Chain Tensioner Replacement is between $332 and $398.

Labor costs are estimated between $141 and $207 while parts are typically priced around $191.

This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.

For a more accurate estimate based on your location, use our Fair Price Estimator below.

Timing Chain Tensioner Replacement

Common symptoms

A worn tensioner will give the timing chain too much slack, and this may lead to a slapping noise, especially when first starting the engine. A worn tensioner may also cause the check engine light to come on, and the engine may run rough, hesitate or stall.

Common misdiagnoses

The sound of timing chain slap is similar to a tapping lifter at startup, so many times they are not replaced because the sound goes away after a few moments.

Best practices

When the timing chain tensioner has failed, there may be damage to the timing chain guide rails or engine front cover, so the technician may recommend further inspection or changing the oil to check for debris. For engines with more than one timing chain tensioner, they should be replaced as a set.