'03 TLS 167k miles. My TL vibrates between 50-60 only. slower is fine and faster is fine but at that speed it vibrates non stop. It started after i got new tires, and ive had them balanced 3 times by 3 different places and it still does it. Rims are fine and tires aren't out of round. What else could it be? Note: engine mounts need to be replaced but would that make it vibrate at that speed only?

 

Usually, if it only happens at speed, it's a balance problem. Since it started with the tires, I'd try to get a different set. Different brand, different model, something different. I recently had one just like this on an accord. Road force, match mounting, nothing would help. Different tires...... problem solved!

 

Yeah sometimes the tire itself can cause different balance issues when heated.. If balancing didn't solve the problem I would try different tires altogether!

 

Did ya get a better brand tire.....if so take them back and the manufacturer will usually make an adjustment towards replacing them.

Have ya tried rotating them ? Maybe the shop guy overtorqued the lugs !!!