Originally Posted by DavaiLave
... 2004 525i ... oil filter housing gasket has a "moderate" leak ... dealer wants over $550 (plus tax) for the labor ... my local non BMW mechanic and he quoted me around $200 - $220 for the work...
Has anyone here had an issue with a leaking oil filter housing gasket?
Your M54B25 is the same engine that's in my 325. I've done the job, replacing the $8 gasket. It's not particularly hard but $200 isn't a bad price. The alternator has to be removed; the power steering pump must be disconnected. Both of those are attached to the Oil Filter Housing assembly.
If you do-it-yourself you will need 4 aluminum washers to replace on the VANOS oil supply line, which are not expensive--around $5.
While a mechanic is in there you might want to replace these things:
1) CrankCase Ventilation (CCV) valve and the 5 related hoses. $175, or so, in parts.
2) VANOS supply line hose, which sometimes starts to ooze at the metal-rubber interface. about $30
3) Inspect the air tube that connects to your throttle body. It's a $15 part but sometimes splits and gives rough idle and codes and sucks in unfiltered air, a bad thing.