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Old 01-23-2013, 01:55 PM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 25,024
Mein Auto: 02 BMW 525i M54 auto 130K
For the record, this entire thread is on the M54 engine DISA o-ring, for folks coming here the first time.

The conclusion is to use a #139 Viton O-Ring.

The reason is shown below:
Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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