Creaking when accelerating or backing up

Asked by May 25, 2017 at 11:53 AM about the 2009 Subaru Impreza 2.5i Hatchback

Question type: Maintenance & Repair

My car makes a creaking/knocking noise when I
accelerate from a stop, or when I slow down. It's
coming from what sounda like front passenger
side. I have an 09 subaru impreza hatch and had
my brakes done 2 months ago, and while I was in,
my mechanic said my suspension looked good.
Any thoughts as to what this could be? I've had a
bad cv join in an old car and this sound is
completely different.

1 Answer

6,090

Creaking is probably just incidental contact between brake rotor and its backing plate (which is often bent when replacing rotors), a small rock stuck temporarily in this gap, or creaking caliper-pad interface. All of the above will probably self-repair. Knocking may indicate loose caliper-bracket mounting bolts...or even a lost bolt that allows the caliper to swing loose and knock a wheel! But you checked that.... Rarely a spring seat will dry out and knock-squeak a bit when starting or braking. Spray a cloud of innocuous lube like WD40 around the lower spring seats and see if it abates.

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