Just curious if anyone else has experienced an issue like this...
My recently purchased car (2020 740d xDrive) has Bridgestone Potenza * S001 RFT's fitted all round on the 20" wheels. I can hear a constant high pitched humming sort of noise in the background, at roughly 20mph and above. It's fairly consistent regardless of speed but always noticeable. Changes a bit with road surface. Initial thoughts are wheel bearing or similar, but the noise remains if you steer left and right.
Brief chronology of events -
Looking online, I have been able to find similar experiences and comments about the S001's. I've not had them on a car before, it's usually P Zero's. So my ear seems to be picking up this very specific frequency, and it's very annoying.
They aren't particularly old tyres and have plenty of tread, so I'm currently planning on getting a new set of P Zero's or something fitted and selling them on, but can it definitely be the tyres?! Just seems so strange.
My recently purchased car (2020 740d xDrive) has Bridgestone Potenza * S001 RFT's fitted all round on the 20" wheels. I can hear a constant high pitched humming sort of noise in the background, at roughly 20mph and above. It's fairly consistent regardless of speed but always noticeable. Changes a bit with road surface. Initial thoughts are wheel bearing or similar, but the noise remains if you steer left and right.
Brief chronology of events -
- Took it to my local BMW dealer who have always been excellent, Master Technician came out with me, can hear the noise and agreed it's not right, booked it in for investigation.
- Replaced the front nearside wheel bearing under warranty, noise still present.
- They then replaced the front differential (!) under warranty and said it was sorted, but the noise was still present when I collected it. They've had it running when on the ramps and can't hear any unusual noises from the wheel bearings/transfer box/gearbox/etc.
- Following this, they swapped the wheels for another set on Pirelli tyres (not sure exactly what wheels they used) and said it was much improved - but I wasn't able to check this myself.
- Ultimately they've diagnosed it as tyre noise and said there's nothing more they can do.
- I consulted a local BMW specialist I know well who came out with me and had a listen, he could hear it and agreed it could well be the tyres, but it's unusual.
- Another local BMW dealer had a same age 730d (non-xDrive) on exactly the same wheels and tyres, went out in that, and I can hear what appears to be the same noise!
Looking online, I have been able to find similar experiences and comments about the S001's. I've not had them on a car before, it's usually P Zero's. So my ear seems to be picking up this very specific frequency, and it's very annoying.
They aren't particularly old tyres and have plenty of tread, so I'm currently planning on getting a new set of P Zero's or something fitted and selling them on, but can it definitely be the tyres?! Just seems so strange.
