Knock Sensor Location:**
The knock sensor (KS) on the 1999 Lexus RX300 3.0L V6 engine is located on the front of the engine.
Here is a detailed procedure on how to locate the knock sensor:
1. Open the hood of your 1999 Lexus RX300.
2. Locate the engine. It is the large metal component in the front of the car.
3. Look at the front of the engine. You will see a number of sensors and components attached to it.
4. The knock sensor will be located near the bottom of the engine, on the front side. It is a small, cylindrical sensor with a single wire connecting to it.
5. The knock sensor will be held in place with a single bolt.
NOTE: The knock sensor may be difficult to see if there are a lot of other components and hoses in the way. If you are having trouble finding it, you may want to consult a repair manual or diagram for your vehicle.
