My alternator was dirtier. Oil filter cap seal failed and dumped a quart of oil out the top of engine.

I refurbished the brushes and slip rings and got a few more years out of it. It was fun to bring to parts store to get their reaction before load testing.

When you remove the stiffening plate, put the back four bolts in that hold the sway bar if you plan to drive at all with the plate off.

You can re-install the bolts to spec about 3x before they self destruct.

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