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Old 01-16-2017, 07:59 PM
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e53 Fuel Supply Detailed (fuel pump / siphon pump diagnostic help)

BMW does recommend against actually running out, but you clearly have 11-13L of gas to consume once the light comes on before you are low enough to be a problem.

It is important to run down close to empty occasionally if for no other reason to test the siphon pump. My wife insisted on never getting below 1/4 tank and that masked the defective siphon pump leaving me stranded at 6F for 3 hours waiting for a tow. I recommend having a gas can with and running down to single digits DTE at least annually.

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E53 / M54 2001 3.0i gas LHD (pair of them: his & her)

Last edited by andrewwynn; 03-01-2017 at 10:42 AM.
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