If the oil filter o-ring was the leak it will be everywhere. Dealer already diagnosed OFH seal as leaking. Replace that clean the engine with some good degreaser and check if there are any other leaks. The engine gets oil everywhere from wind/fan and will be very difficult to find additional leaks.

You can probably confirm the OFH is the source by removing the fan and shroud.

The metal plate and sound foam on the bottom can spend literally months collecting a slow leak until it's a big enough puddle to start dripping in the garage. I left mine off for a week or so while I was finding and fixing my problem. I also replaced the entirely gross oil soaked sponge known as the sound insulation. $55 eBay.


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2011 E70 • N55 (me)
2012 E70 • N63 (wife)