Question about 1994 Lexus Es 300

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Where is the Knock Sensor located on a 1994 Lexus ES300

I would like to know the exact location of the Knock Sensor on a 1994 Lexus ES300.

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  • jefferies03 Jan 07, 2009

    Do you have to remove the Intake Manifold to access the knock sensor or is it visible and easy to replace.

  • jefferies03 Jan 09, 2009

    I am still wondering if the Knock Sensors are bad since the car is idling around 500 rpms and the Code Reader (Check Engine Light is ON) states a P0325 and P0330 error. The car is loping and I was thinking if the Head Gasket is blown, I should get White Smoke or the Oil Dipstick would look milky looking. The car does not smoke at all, no leaks and it might burn 1/8 quart of oil between 3K - 5K mile oil change (214,000 miles on vehicle). Now I have to replace a busted radiator since it was overheating. By the way the loping occurred first followed by the Check Engine Light then finally the radiator busted. No the car is not mine anymore I gave it to my daughter (LOL) 1 1/2 years ago (yes we all know proper maintenance was not performed).

  • yadayada
    yadayada May 11, 2010

    check the engine block water jacket down low.

  • Anonymous Mar 16, 2014

    Where is the fuel pump located on the lexus es300

  • Anonymous Mar 18, 2014

    I just bought a 95 es300 lexus and the overdrive off light is on and I need to put the overdrive back on. O have no idea where the o/d switch is located can you tell me hoe to engage the o/d again?

  • Anonymous Mar 18, 2014

    I bought a 95 es300 lexus and the O/D off lite is on and the overdrive will not kick in How do I O fix this as I dont know if it has a overdrive button or what? How do i get the o/d to come back on?

  • Anonymous Mar 19, 2014

    I have a 1995 Lexus es300,sometime accelerating the gear slip.



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  1. located on top of engine below intake manifoldWhere is the Knock Sensor located on a 1994 Lexus  - graphic.aspx?mod=reptiff&module_id=1&session_id=%7ba7aa889f-b7e3-42e1-9ece-3476a2533f69%7d&image_guid=95d24086&print_bw=0&

Posted on Jan 07, 2009

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I do not recommend to do the knock sensor on V6 engines yourself , if you don't have mechanical skills. You will end up towing car to mechanic shop , it's not that easy as the guy saying here.
He might be right about wiring , yes maybe knock sensor is not bad , but once you there it's worth to repl. both knock sensor and wire harness which is $50.00 from dealer.I know knock sensors are expensive ~ $170.00 a piece , but sometimes testing sensor manually when it's exposed can mislead you if problem intermittent.
Good luck to all of you.

Posted on Apr 16, 2010

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1 That's SK's way of telling you should search first. Knock sensors are covered on every Toyota/Lexus v6 forum to death.

2) 1mz-fe's (ENGINE TYPES) are notorious for having over sensitive knock sensors. You should run your tank of gas low (18.5 gallon tank), refill with high octane fuel & reset the ECU (Pull the EFI fuse a second & replace)

3) 90% of the time the wiring is damaged - the knock sensor is fine. A knock sensor is nothing more than a piezo in a metal housing. Nothing to break less a mechanic does it during repairs, or the sensor shorts out (that falls under bad wiring).

4) It's a two piece intake manifold, some wires, some hoses, some cables, a fuel rail. Not engineering a new insulation foam for the space shuttle that the EPA says is "environmentally friendly".

You need a normal set of tools:
Normal & deep well metric sockets. Specifically 10, 12, 14 mm with extensions
Lexus provides cheap chrome coated wrenches 8/10, 14/16 mm in your tool pouch

If you're smart; you'll get a brush & some type of strong cleaning agent, and clean the entire upper intake air chamber (the actual name for the upper intake), including everything connected to it. (Throttlebody, ISC & EGR valves)
Have some RTV silicon on hand incase you break a paper gasket.

Posted on Jan 07, 2009

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Can u advance the timing on a 1994 lexus es300, im using 94 octane woundering how to advance timing

Why would you want to? No you can not. The ECM will keep the timing as advanced as need be until the knock sensor picks up ignition knock, then start to ****** timing until the knocking condition is gone. The ECM continually monitors and adjusts timing as needed to eliminate knock. Leave it alone.

Oct 14, 2012 | 1994 Lexus Es 300

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Where is the knock sensor located in 1999 lexus es300

the knock sensors are located underneith the intake manifold on either side of the engine block. you have 2 of them

Aug 31, 2012 | 1999 Lexus ES 300

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How to replace knock sensor on 1994 Lexus ES300


This is a big job, you will need to remove the intake manifold and various other intake components to get to the knock sensor, which is sitting in the V gulley of the engine.

But basically you need to remove all inlet tract components, and the top cooling system components, then remove inlet manifold and there you will see the knock sensor.

Good Luck



Aug 18, 2010 | Lexus ES 300 Cars & Trucks

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I was needing to know where the knock sensor is on a 94 Lexus es300

this is located underneath the Intake plenum and manifold.

Aug 04, 2010 | Lexus ES 300 Cars & Trucks

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LEXUS es300 oil light stays on oil level full

Check oil level sensor, replace if necessary. also, does your engine knock or make a tapping sound?

Mar 28, 2010 | 1994 Lexus Es 300

2 Answers

92 lexus es300 knock sensor

Need to remove the upper and lower air intake manifold.  There are two knock sensors for the front and rear pistons banks.  If you plan to do this yourself it is about 1 to 2 hours.  While you are at it, there is a short coolant bypass hose sitting in the same spot, replace it.  Another problem with the knock sensor is the wire harness used to connect the two knock sensors into one connection sometimes wears out and contacts the metal on the engine causing false signals to the ECM, so replace this cable also.
Just did this last summer on my 99 ES300.  Pretty easy.

Mar 01, 2009 | 1999 Lexus ES 300

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