Here's a link on replacing your knock sensor. RX300 knock sensor replacement DIY Club Lexus Forums
SOURCE: Where are knock sensors in my 99 Lexus RX 300 ?
Hello there..They are in the back of the engine block about in the middle of the motor..There might be one in the front of the engine in the middle of the block but most are in back.Hope this helps you and have a great day..
I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589
SOURCE: Locate the Knock Sensor in a 2001 Lexus RX 300
better get another mecanic as the motor is the same as a toyota 3.0 lv6....scary
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