What is the factory recommendation to have the timing belt replaced? Lexus timing belts have been very reliable. However, the timing belt is subjected to severe stress if the vehicle is operated under extensive idling or low speed driving for long distances, such as in heavy commercial use such as delivery, taxi or patrol car. If the timing belt breaks, the engine will stop running and will not restart until it is repaired. While it is possible that the original timing belt may last the life of the above engines, for peace-of-mind, the timing belt may be replaced every 90,000 miles. Also, if major engine work is performed, such as a valve job or engine rebuild, the timing belt should be replaced.
It is recommended that when you're ready to get your timing belt replaced, ask a service consultant about water pump and related parts associated with the timing belt job. Normally, it's timing belt, water pump, drive belts, thermostat/gaskets, cam seal, cranks seals, and a PCV valve are parts of the Timing Belt Job. Average cost for this whole timing belt job $1000, prices may vary.