Humming sound with door open/unlock doors [Archive] - Bimmerfest - BMW Forums

: Humming sound with door open/unlock doors

05-24-2010, 10:47 PM
I have two months old 2010 535i. I got replaced fuel pump due to slowed start up problem. (BMW Service updated s/w first, then two days later problem back so they replaced fuel pump.)
After replaced fuel pump, I has been hearing loud humming sound when I opened door/unlock door. It sounds like electrical motor sound like robot-cop is activating. When I heard first time, I thought my neighbor is doing some remodeling using drilling.
Actually there was very low frequency humming sound from the first day of this car with door opening but after replacing fuel pump it became very loud noise like I describe above.

Anybody has same issue and/or has solution?

I saw somebody said it could be fuel pump start up and charging sound with door opening, but I'm not sure.

05-25-2010, 05:35 AM
its the fuel pump building pressure for a good start.