Where is the air-filter in 1991 Lexus ls400?

Answer 1

For the 1990-1994 Lexus LS 400. The air filter is on the passenger side right behind the passenger head under the hood. To access it you must use have a socket wrench and a 10 mm socket.

1. Go to the driver side under the hood near the battery. In front of the battery there a then cover that you must lift up. Once you have lifted this cover, there is a silver screw that is holding the air cover directly over the radiator. Remove the cover and then loosen the screw to take the center air cover off from over the radiator.

2. While working your way to the right, you will notice there is another cover on the passenger side. Remove this cover and you will then see the air filter. The air filter is big round and has a latch. The only way that you can access the air filter is by removing the 3 screws that hold stable to the air induction which is connected to the throttle plate.

3. Remove these screws with the same 10 mm socket and also loosen the lowest clamp on the air induction so you can take just the air filter housing out. You may have to move back and forth to wiggle out.

4. Once you have wiggled out the air filter housing, you can unlatch the air filter and then replace.

5. Then reverse the instructions to reinstall.