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Old 01-26-2022, 01:30 PM   #1
Scooby Newbie
Member#: 528460
Join Date: Jan 2022
Default 01 RHD STI Clunking/Knocking/Popping Passenger Wheel Well - Left Turns Only

I drive a 2001 RHD STI. I've had the car for about 3 years and for nearly the last 1.5 years this has been an intermittent problem that I've been chasing. When the car is warm (about 20-30 mins of driving), during slow left turns I hear a knocking/clunking from the front left wheel well, and it can be lightly felt in the floor. This is a series of deep knocking sounds. The longer I drive, the worse it gets, where eventually after turning the sound will persist when driving straight. It is the most noticeable under the following conditions: slow left turns, reversing left, and after a while of driving when slowly creeping to a stop and starting from a stop. When the car is off the ground we can't replicate anything, seems to need to be under load. The car can be in gear or in neutral and it will still clunk.

This is driving me crazy. I've replaced the following:

- - Strut mounts
- - Endlinks
- - Inner tierods
- - Axles
- - Ball joints
- - Rotors/pads

On several occasions I've changed or played with some of these suspension pieces and the noise has seemingly randomly stopped for weeks. But it has always returned and is the exact same (and getting worse).

Inspected engine mounts and most bushings. I've read a lot of posts about it possibly being the center diff, but the noise is clearly coming from the left wheel well and exclusively on or after left turns, never on rights, and it sometimes continues to make the noise when the wheels are straight.

I've tried to make several recordings to give an idea of what it sounds like at different speeds:

Any ideas? Is this suspension? Is it the diff?
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Old 01-30-2022, 10:38 AM   #2
Scooby Guru
Member#: 107618
Join Date: Feb 2006
Chapter/Region: Tri-State
Location: NY
06 GG WRX / 09 FXT


anything going on with the control arm bushings? what about the wheel bearings?
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