Trev48

Dealership Service technicians confirmed the clunk was again caused by movement in the handbrake shoes. Action taken to fix under warranty was to remove & clean the handbrake shoes, apply white grease, re-assemble, carry out adjustments then road test. Problem appears to be resolved. Hopefully permanently this time.

14,000 km.

The rear end clunk with exactly the same symptoms in my new IS250 has begun to re-occur after what now appears was a temporary fix in February (refer posts late Jan & early Feb). I have the car booked in for it's 15K service next week when I will be requesting it to be fixed again. I will be disappointed if I don't get a PERMANENT fix for the problem this time. It will be the third time I have advised the Dealer of the problem, the 1st being late December, the 2nd late January.

Problem first noticed 2/3 months ago when the radio was turned off and windows opened. As such, when I then started specifically listening for it, I could hear it with the radio on and windows closed so I suspect the car may have had the problem from day one. As well as it occurring in instances similar to you, I could also hear it when either of the rear wheels went over the small reflective lane markers (for want of a better description) in multi-lane roads. Lexus dealership advised this was their first awareness of this problem in the current IS250 model and they were going to report it to Lexus Australia.

I was advised that the rear end clunk was coming from the park brake shoes. An adjustment of the shoes appears to have resolved the problem.

Thank you for your advice. Yes, it is still under warranty. I will take it to the dealer early next week and road test it with them to demonstrate the problem. I will post what the outcome is.

I am having exactly the same problem with my new (latest model) IS250. Any suggestions will be greatly appreciated.