micalexs Posted March 12, 2016 Share Posted March 12, 2016 I am driving an 08 RX 400H. and this noise we are worrying about is making me worry if something falls off my car and becomes a road hazard to others... it sounds like the spare tire is loose, but we checked it and it is secure.. can anyone help me to figure out what that noise could be? thanks! Quote Link to comment Share on other sites More sharing options...
carlover_rx Posted March 12, 2016 Share Posted March 12, 2016 hi, you may check below : 1) Rear balance & stabilizer bars whether their is any play between joints , screws or broken rubber bus. - Inorder to check this you need to jack the vehicle from the chassis, leaving all 4 wheels free without any load. otherwise you wont be able to diagnose with the vehicle load on these joints. 2) Check rear suspension. You may check whether suspension bolts & screws are tightened enough. Inorder to check this you have to remove two plastic lids from the in-cabin boot compartment. Located on the rear mudguard. 2) Check Silencer bushes 3) Check whether you have placed your spare tire on correct side. Avoid any metal to metal contracts between tire RIM & tire rack. hope this helps. 1 Quote Link to comment Share on other sites More sharing options...
zieke Posted March 13, 2016 Share Posted March 13, 2016 Joan, U don't say how many miles on your vehicle, but it could also be a rear strut. As previously stated the car needs to be on a hoist to get checked correctly, but the cost is usually reasonable to have that done. Good luck 1 Quote Link to comment Share on other sites More sharing options...
micalexs Posted March 15, 2016 Author Share Posted March 15, 2016 I have a high mileage on it, 138K... the cover for the spare tire moves,is that normal? Quote Link to comment Share on other sites More sharing options...
jetfixer01 Posted March 18, 2016 Share Posted March 18, 2016 Yes, the inner circle of the cover moves, but should lock when turned clockwise. What has been said by other folks here is correct. My guess is that it is time for new rear struts. Mine is doing the same thing. One way to check is to jack the car from the side until the rear wheel is just off the ground. Then put a long pry bar under the tire and lever the tire up & down. There should be smooth resistance. Mine has a "dead" spot before I get resistance. That is the worn out strut and the noise of it not being able to take the bumps smoothly anymore. Quote Link to comment Share on other sites More sharing options...
gwgang Posted June 12, 2016 Share Posted June 12, 2016 It's the rear struts. Struts fail gradually, and there are different sized valves inside the strut. The small ones control small up and downs, and they fail first. Your tires are slapping the ground too hard, thus the thumping noise. Quote Link to comment Share on other sites More sharing options...
Robert S Posted Sunday at 06:42 PM Share Posted Sunday at 06:42 PM RX350 2007. I have the same problem. Loud thumping in rear when going over bumps or when turning. Suspension checks out ok. Spare tire ok. Any thoughts? Quote Link to comment Share on other sites More sharing options...
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