How do you replace oil control valve on Lexus rx300?

To replace the oil control valve on a Lexus RX300, first, ensure the engine is cool and disconnect the negative battery terminal. Remove the engine cover, if applicable, and locate the oil control valve, typically found near the top of the engine near the camshaft. Disconnect the electrical connector and the oil line connected to the valve, then unbolt it from the engine. Install the new valve in reverse order, ensuring all connections are secure and checking for leaks after reassembly.