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      04-16-2014, 04:15 PM   #3
bruno787
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Drives: 23 735i
Join Date: Sep 2009
Location: Philippines

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This has been a known defect on early Mercedes 7G Tronic trannies, but as I had googled Bmw Mechatronics there are a lot of threads about this in the 3 and 5 series forums.

Bmw mechatronics in laymans term is "valve body" or the mechanical/electrical brain of the transmission. It usually takes 2 hours to remove/install as it does not require tranny removal, you just need to lift the car and work underneath.

Bad thing is this part costs $2500-3000, and realoem says its a "rebuilt component" at that so there must be a lot that's failing but never discussed on this forum. Bmw part does not list a brand new component at this point
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