Bimmerfest - BMW Forums - View Single Post - What is this engine part? (Getting to know my M54 engine bay)
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Old 08-07-2012, 05:44 PM
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bluebee bluebee is offline
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Location: San Jose, California
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Originally Posted by timarnold View Post
The blue twist plug is a cover plug that is removed to insert the flywheel lock to lock the engine at TDC when setting the VANOS timing.
For the record, someone else asked the same question today:
-> E39 (1997 - 2003) > Help identify blue plug-like cap off Engine or Tranny?

Originally Posted by samdayo View Post
Something broke off or fell off my 2001 525i Wagon under the engine/transmission area. I found it on the floor under my car and it looks very brittle. It's blue and looks like a plug of some sort. I'm attaching an image.

Can anyone identify this for me and tell me where this broke off from? Is it important and will it be fine without it?
Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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