Nissan Repair: nissan terrano 1999, nissan terrano, fuel pump

Question
their is a buzzing sound coming from what seem to be the rear drivers side.can only hear it when the window is down.can you help?.

Answer
Peter,

If there is a buzzing noise coming from the back with the window down could mean that the fuel pump is getting ready to fail.  Start the vehicle and walk to the back and isolate the sound.  The fuel pump is the only thing that would vibrate back there.