Lexus RX350 owners have reported 3 problems related to engine grinding noise (under the engine and engine cooling category). The most recently reported issues are listed below.
The contact owns a 2008 Lexus Rx350. While starting the vehicle, the contact heard a grinding noise under the hood. The noise was only present for a few seconds, especially in cold weather. The manufacturer was notified of the failure and informed the contact that the camshaft sensors were failing. The vehicle was not repaired. The failure mileage was unknown.
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I own a 2007 Lexus Rx350. When starting my car, a grinding sound is heard coming from the engine every 1 out of 7 or 8 times. The performed a diagnostic test, and the dealer advised that the camshaft tower would need replacing. Apparently this is a common problem with the year, make, and model. The failure mileage was 89,000. Lexus said they woulc cover parts but not labor, labor is 2/3 of the cost (total estimate $3800). Apparently the car is unsafe to drive as is.
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The contact owns a 2008 Lexus Rx350. The contact stated while stopped at a traffic light, an abnormal grinding sound was heard coming from the engine and the vehicle attempted to stall. The contact took the vehicle to dealer and after performing a diagnostic test, the dealer advised that the camshaft tower caused the engine to stall and would need replacing. The vehicle was not repaired. The contact stated that the failure was a common problem with the year, make, and model. The failure mileage was 88,000. Updated 10/17/11.