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My 535i was running fine than it took a while to start but it did, then the next day it would not start. i have replaced the fuel pump relay because when I by pass the relay the fuel pump works, with the relay in it still does not pump when i turn the engine. With the new relay in it still will not start.
I need help to get this fix any suggestion?
TBH I provisionally think it is electrical, but you could try this in the mean time -
I believe the fuel pump is under the car behind a panel... Remove this panel and purge any air by pressing the tiny valve (identical to a tyre valve)...
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2011 BMW E38 728i
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