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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: 25,236
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 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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