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Intermittent "jerky" roof opening

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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jamesgarbett
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Location: South Manchester

Intermittent "jerky" roof opening

Post by jamesgarbett » Mon May 13, 2024 2:35 pm

From time to time when my roof opens some of the movements are rather jerky.
The cycle always completes but i have this fear that at some point it will get stuck halfway.
Closing is always smooth.
I would say this happens during maybe 1 in 10 roof openings.

Any clues as to what is going on?
Z4 ‘13 20i Mineral Grey
Z4 '07 2.5Si Montego Blue

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Chippie
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Intermittent "jerky" roof opening

Post by Chippie » Mon May 13, 2024 3:52 pm

Possibly a broken wire in the harness where it bends as the roof opens and closes.
E89 35is space grey Kansas coral red leather

flybobbie
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Intermittent "jerky" roof opening

Post by flybobbie » Tue May 14, 2024 10:01 am

Reach up behind your right ear towards roof, you can see wires exposed. Try pushing those see if you can get it to bong and red light near buttons flashing, if so broken wire.

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