Thread: fuel pump
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      01-01-2013, 11:06 AM   #5
roundel335
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Drives: 13 335i Sedan, 11 128i Cabrio
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Location: Leland, NC

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Most of the early 335 HPFP problems were due to higher ethanol content in our fuel causing deterioration and a software problem where the low-pressure pump wasn't priming the high-pressure pump sufficiently, causing it to "run dry" and damage itself. The newest pumps for the turbo engines are a different design, and after the software update, whenever you unlock or open a door, you'll hear the LPFP running for several seconds.
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2013 F30 335i M-Sport 8AT/MPE/MPPK, 2011 128i M-sport Cabrio 6MT/PE
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