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Old 10-30-2018, 11:06 AM
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DBU DBU is offline
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Location: Orange County, CA
Join Date: Dec 2005
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Mein Auto: Glacier Silver X4 M40i
Originally Posted by Rotorblade View Post
I have a 01/2012 sdrive model and I've heard about timing chain problems. They tried to fix it with the second batch but apparently these still have problems. The car is now 55k km and it doesn't make any unusual sounds yet. Shoud I preventively replace the timing chain now, wait to do more km or wait until it would start to make rattling sound ?
BMW has used at least three different Timing Chain Tensioner in their 4 cyl turbo engines. I am not intimately familiar with the engine in your 1.8d, but it should be a relatively simple job to change it. I changed mine (N20 motor) and posted a DIY.

Also, the warning sign/sound is not a "rattle" sound but rather a RPM dependent "whine" sound. There is a sound clip on the internet that BMW actually use to diagnose this issue.

Finally, have a look at this blog: and search there for "Timing Chain." Lots of useful info there, incl. the infamous sound clip.
His: 2017 X4 M40i - Glacier Silver with all the options (except cold weather stuff) - not needed in SoCal
Hers: 2015 X4 28i - Glacier Silver - loaded M-Sport

Last edited by DBU; 10-30-2018 at 11:09 AM.
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