BMW N20 engine
This page is a draft. It has not been approved yet, so read it with care.
Watch out for
Reputation: what owners and the press report. Tap one to see what to check.
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Plastic timing chain guides that fail Every version One source so far
What to check: Listen for a whine or rattle from the timing chain, and ask whether the chain and guides were replaced.
Wikipedia says thousands of early N20s were built with faulty plastic timing chain guides, that the chain can then jump teeth and wreck the engine, and that owners filed a class action in 2017.
Sources 1