[ttimbo]

So, where is the car now? With the BMW tech, or still at the top of the mountain? Are there any warning lights showing on the dash? Have you checked the battery? Have you tried a push or coast start (not recommended of the engine has actually seized -- see below, but sometimes, rough treatment can lead to a battery collapsing (best case scenario ?)

In describing the crankshaft as "stuck", are they saying the engine has seized? That is, a bearing has overheated and welded to the conrod, is moving within the block, or a piston has welded to the cylinder (the term covers many similar situations)

If so, I'd expect to see an oil leak somewhere, and the strong smell of burnt oil when opening the oil filler cap. I'd also expect a Christmas tree of lights on the dash, plus codes on the iDrive "vehicle status" screen.

I would think the BMW ECU includes an over rev protection mechanism, so I find it odd the tech is saying that's the cause...

Let us know what is happening.