Hi - hope someone can steer me in the right direction on this...

In the last month or so, I've noticed that when cornering with a hard G-load (long sweepers at speed, for example) I hear a grinding noise from the front end, the traction control engages. This is gradually getting worse, and occurs in both Right and Left turns. Brakes are new (rotors and pads), and this started occurring prior to the brake job.

I've been experimenting a little, and the last time I pushed it, the traction control light stayed on, and the info system warned that ABS, TCS, BLIS functions were impaired (or something like that). On restart, the light went out and all was normal.

The grinding noise is continuous when it occurs - like metal on metal.

Any ideas?

Many thanks for your help!

 

could be a wheel bearing - but normally they sound different going left vs right as the suspension loads up one side. I'd also check out the CV joints (see if the boots are torn, if the axles appear to be stable in place). also inspect the brake backer plates to see if they are bent and possibly rubbing.

 

Yeah, I was thinking the same (bearings), but the sound is identical when turning in either direction. I hadn't considered the CV joints, since (in my experience) that's usually a clicking kind of sound - but worth a check for sure.

Brake backer plates sounds promising - the sound is similar to what I'd expect from something rubbing against the rotor. With the new (unworn, therefore thicker) rotors, the rubbing may be more pronounced than before, and it seems to be the case. But would that be enough resistance to trigger the ABS/TC, do you think?

I was originally thinking that the ABS ring might need replacing, but on this model, there doesn't seem to be an ABS ring, I think it's magnetic.

And thank you for the reply!