To replace the knock sensor on a 1999 Lexus RX300, first, disconnect the negative battery terminal to prevent electrical shorts. Then, remove the intake manifold for better access to the knock sensor located on the engine block. Disconnect the wiring harness from the sensor, unscrew it using the appropriate socket, and install the new sensor by reversing the process. Finally, reassemble the intake manifold, reconnect the battery, and check for any error codes.
~$400 on OEM parts + 8 hours of labor
Underneath the lower intake manifold, in the valley between the cylinder heads.
Lexus manufacturer recommend replace timing belt on Lexus rx300 every 105,000 miles.
In the Lexus RX300, the knock sensor is typically located on the engine block, often near the cylinder head. Specifically, it can usually be found on the driver's side of the engine, underneath the intake manifold. Accessing it may require removing some components for better visibility and ease of replacement. Always consult the vehicle's service manual for precise location and instructions.
Take the new antenna and your RX300 to Circuit City. They will install it for about $50.
These sensors are available on EBay for ~$70
It's attached to the throttle body.
at 90K or 8 years.
Front Bumper (Left Side)
It's attached to the throttle body.
A/F Sensor for Bank 2 Sensor 1. It is the O2 sensor on the front manifold.