afaik, they are the same part(s) m50/m52 as long as they are not euro specn parts. i do not know what the difference would be, though i doubt we'd be coming across any euro spec vanos units without the rest of het euro-spec engine...
besides, if they were different, then we wouldn't be able to 'upgrade' cams from an //M motor to a non //M motor.
i could probably manage to snap a few pic of the m50 andd m52 vanos housings and solenoids as i have both (one is @ the farm, so it wouldn't be until tomorrow at the earliest) just to be sure.
Could that just be from an improved unit? I know that's usually the case with parts that have gone through major updates.
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