Yeah I'd be surprised normal wear and tear would be impacting it at 9k. But worth checking in case something has failed.
Agreed, my Stinger was pulling to the left due to a warped rotor catching the callipers. It was more noticeable under breaking so easy to diagnose but the car had only done 4.5K miles.. To the OP: As per usual there's a list to follow when trying to figure out issues like this in order of most likely.
- Tyre pressures
- Wheel Alignment / Tyre's, problem is if your car has been misaligned and run for a while it can damage the tyre's which causes.. You guessed it pulling to one side. Same goes for tyre pressures due to uneven wear and some tyre's just aren't that great..
- Brake issues (like a stuck calliper / seized pins, the latter will definitely cause issues)
- Suspension components (rods, joints, bushes etc.), happens more than you'd think due to our lovely roads / pot holes..
- Faulty wheel bearing (usually you'd hear a grinding noise first, happened on two of my old Mondeo's)
- Steering rack / linkage / sensors (rare but I have a rack replaced after 3K miles)
Note: Bigger tyre's with stiffer suspension do have a habit of tram-lining, whilst what you've described seems a bit more severe than normal it's a cumulative effect hence if there's something wrong it does make it feel worse. That being said my Cupra MK4 300 on 19's wasn't all that bad..