Quote:
Originally Posted by Weiman
Much more than 3 years. The M550d was introduced in 2011 and the F20 M135i was introduced in 2012, for example.
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First time we saw it was in 1985 in the E28 M535i -
https://en.wikipedia.org/wiki/BMW_5_Series_(E28)
Edit: Correction. 1983 E24 M635CSI -
https://en.wikipedia.org/wiki/BMW_6_Series_(E24)