Steering wobble, brakes pulsing and chaffing sound

[PistonAFC]

I have an old Toyota Auris 2007

My car has developed steering wobble, which seems worse if tyre pressure is low. The brakes also pulse at the same point (if that makes sense) and there is a rubbing/chaffing sound at the same point when driving (it speeds up and slows down with speed).

I think it started after I hit a kerb (OSF tyre and possibly OSR) and went over it at around 20 miles an hour on a roundabout but not 100% sure of this. Front pads and brake discs are new-ish, rear pads are also newish but discs are quite old but the car passed MoT with the steering wobble/pulsing brakes issues with no advisories.

Where should I start with a diagnosis of the issue? I was thinking of swapping the front wheels and back wheels to see if that makes any difference to start...

Any other ideas ?

[GreenV8S]

Given that history you've got to suspect a buckled wheel, so your first step should be to jack up the affected corner and spin the wheel to see whether it's still round and true.

[PistonAFC]

I jacked up the OSF (drivers side) tyre and tried to spin it. It stops at the same point and takes more effort to spin it past that point. I couldn't spin it enough to see if it's buckled as it would stop before doing a full spin.

I took the tyre off and tried to spin the OSF brake disc. It stops at the same point and is takes more effort to spin it past that point.

I replaced OSF (drivers side) tyre with the space saver tyre. NO MORE steering wheel wobble but brake still pulses at the same point each time (and speeds up with speed) and feels worse at lower speeds.

My conclusion from the above appears to be:

1) that the OSF (drivers side) alloy is probably buckled which would explain the steering wobble disappearing after using the space saver tyre.

2) brake disc is buckled which is why it stops spinning at the same point and brake pedal pulses.

Am I right?

Any other ideas/comments?

[Megaflow]

Sounds to me more like a buckled wheel hub than a wheel. The wheel being buckled won’t stop the wheel, but if the hub is buckled and the disc is no longer running true it will be tight in the brake caliper at some point.