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Noisy fuel pump E89 Z4 23i

Posted: Sun Mar 24, 2024 12:40 am
by Hello2010
Hello, I was wondering if anyone else has had a similar issue / characteristic on their Z4.

I’ve owned my E89 Z4 23i for several years and when the fuel tank is above 2/3rds of a tank, it makes a rather whining sound when sat on idle. Runs a dream and no noise when driving.

I was told it is nothing to worry about as apparently it’s fairly common, however I’m wondering if anyone else has had similar and whether there is a suitable solution to fix this.

Apparently BMW issued a statement to say there is no harm - however I cannot find.

Any advice appreciated.

Noisy fuel pump E89 Z4 23i

Posted: Sun Mar 24, 2024 9:46 am
by Rockhopper
Give it a few doses of Redex and see what happens.