For the past few months my customers car (2002 Kia Rio 4 Door, 82,000 miles) has been vibrating when my customers go between 55-65mph. It is vibrating in the wheel and throughout my customers car (my customers passenger seatbelt even vibrates loudly). Thinking it was my front tires, my customers had my customers front tires replaced and balanced Autel MS906. That did not solve the issue - Now there is a loud noise coming from the back of my customers car. When my customers go 65mph my customers car vibrates badly and the noise overpowers the radio. When my customers look at my customers car from a distance it looks like it is leaning down on the left hand side. my customers took my customers car to have the rear tires balanced thinking that would solve the issue. my customers was told that my customers have an uneven treadwear on the driver rear tire.

Someone has already checked the wheel bearings in the rear and found them to be in good condition. My customers have replaced the front two tires and the passenger rear tire.

my customers is not sure what the problem could be. Any ideas?

well since the tyres and wheels are balanced, I'll advise you tell your customer to change the two front disc and again check the shock absorber pads are in good condition.

Do these and thank me later

https://www.autoscout.com.ng/listing/kia-rio-2002/
Kia rio