Bought a new Kia Cerato sedan (Australia. In US Kia Forte). As part of the deal I got aftermarket wheels.
Initially I felt a lot of vibrations all over the car, so I took it to a tyre shop. They said dealership did a poor job fitting the tyres and balancing them.
They balanced the tyres and most of the vibrations went away, except a knock/vibration I can feel on the steering wheel at high speeds (100-110 Km/h) or sometimes when the road surface has small imperfections.
The knock/vibrations feels very strong at highway speeds when I turn the wheels slightly. Also at lower speed it is felt when turning.
Knock/vibration is subtle, but I drive 100km every day and it gets terribly annoying.
Took the car back to the tyre shop and they said tyres were bad (nexen). I replaced the tyres with bridgestone turanza tr001 ones.
Problem still there!
Tyre shop says to bring it back to Kia under warranty, it could be a defective part, engine mount, rod, etc. They refuse to do any other work in the car as they have balanced the tyres many times.
I wonder what to do?
Is it the aftermarket wheels? Or they don't know how to fit them properly? Should I take the car somewhere else? Make a warranty claim with KIA (car is not factory spec as I fitted aftermarket wheels).
p.s. My wife has another Kia Cerato Hatch, factory specs, steel wheels, and drives flawlessly which is why I bought myself one.