The PCV valve on a 2002 Lexus RX300 is located on the passenger side of the car underneath the hood. The valve will be on the rear valve cover.
Passenger side of engine on the rear valve cover.
Passenger Side, top of rear valve cover
pry it off with a rusty butter knife
One or more of the brake lights or tail lights are burnt out.
don't get a Lexus
Check out this diagram, should be all you need! http://img125.imageshack.us/img125/7711/bodywt1.jpg
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On a 2002 Lexus RX300, the PCV (Positive Crankcase Ventilation) valve is located on the engine's valve cover. Specifically, it can be found on the driver's side, near the rear of the engine. You may need to remove the engine cover to access it easily. Be sure to check the valve and its hose for any signs of wear or blockages.
You can change the rear brake pads on a lexus GS3000 by loosening the lug nuts slightly for the wheels, raise and support the vehicle safely, remove the wheels.
The PCV valve is located on the passenger side rear valve cover. Simply pull it out then pinch the clamp to release the valve. I would recommend replacing the PCV valve grommet while you're in there, they get hard and brittle and can break into pieces that fall inside the engine.
that he must remove to get to spark plug rear of the cylinders