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Hi, Have you tried to uninstall the ground strap completely, and then go for a short ride to confirm that the ground strap is the issue? If you remove the ground strap from the chassis, the sound should disappear. If the ground strap is indeed the issue, then modify the setup as enclosed...

Hi, I had a high pitch sound while driving 40 - 70 km/h. I suspected that it had to do with the ground strap. For confirming my hypothesis, I took off the ground strap from the chassis and went for a short drive. No high pitch sound whatsoever when the ground strap was removed. I then changed...

Hi, I managed to figure out the issue. After reading quite a lot, I suspected that it was coming from the rear ground strap. I tried to tighten the bolt, which made the sound level to go down by 50% or so, so that confirmed my suspicion. I then changed the setup of the screw, which was screwed...

Hi, I own a 2021 M3 LR. Recently is has started to make a whistling sound when for instance driving 50 km/h and applying a slight acceleration. The sound stops as soon as I stop the acceleration and keep a constant speed. Any suggestions on what this issue would be about? Kind regards from...

Hi RomeDiggy, Did you take the car to SC? If so, what was the outcome of it? I have the exact same issue. Regards from Denmark.