Question about 1999 Subaru Legacy

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Location of knock sensor

I had a diagnostic done on my 99 legacy and it said the knock sensor is bad. If there is no knock sensor then why would it say it is bad and why does Auto Zone and Advanced Auto both sell them? And if your looking for the locatin it is under the throttel body to identifiy it look for the white end on the conector. They are also suposed to be very hard to get to. Good luck

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You can replace them, I assume they are very expensive, I did a toyota avalon once, since it was a V6 it sits in that V6 valley. It was hell trying to get to. The parts was very expensive for a pair of piezo crystals, which is what a knock sensor is. They are almost like those little piezo element for tweeters that you can buy for 5 bucks. LOL

Posted on Jun 30, 2009

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1998 subaru legacy ,replace knock sensor


if the engine has a knock sensor it is attached to the block between cylinders on the outside.

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the computer receive signals if engine knocking and adjust the timing till stop.Before replace the sensors make sure the engine have no other misfire ,bad gas or vacuum leak.plug scan tool and read the code.Only circuit problem will be a true knock problem. Inspect all wire connectors before start taking a part.

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Knock sensor has gone bad most likely. I had the same problem with the same car and replaced the knock sensor. Fixed the problem. Very common with Subarus. It's an inexpensive part but it requires patience and small surgeon's hands to get to it and replace it. Lots of how-to articles on line.

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Location knock sensor1997 subaru legacy outback


The knock sensor is located on the top of the engine block almost hidden from view by the intake manifold. It is almost directly below the spot where your throttle cable connects. It will have a bolt running right through the middle of it and a single wire coming out of it.

Apr 23, 2010 | 1997 Subaru Legacy

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1997 subaru legacy outback knock sensor location


Hiya,

Here you go:

2.5L Engine To Remove:
  1. Disconnect the battery ground cable.
  2. Remove the air cleaner housing.
  3. Vehicles with 5-spd transmission: Remove the clutch slave cylinder and set aside.
  4. Disconnect the knock sensor wire harness retainer from the coolant hose.
  5. Disconnect the knock sensor (KS) wire connector.
  6. Remove the mounting bolt and knock sensor from the engine block.
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Hope this helps...

Cheers,

Nov 12, 2009 | 1997 Subaru Outback

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Knock sensor 1999 Legacy 2.2


As far as there being no knock sensor on a 99 2.2 I beg to differ. I have a 99 legacy and just had a diagnostic done and mine is bad. If there is no knock sensor why would it say it was bad and why does Auto Zone, Advanced Auto and my local Subaru dealer sell them. Mine is located under the throttel body and they are rather hard to get to. No offence to who ever said ther is no knock sensor but maby you should recheck your information becuse I know there is a knock sensor since I just changed mine.

Jun 14, 2009 | 1999 Subaru Legacy

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Check engine light for misfire cylinder 2 and 4


If the engine seems like it's OK but you are just seeing a solid Check Engine Light, and if the light has ever mysteriously gone out on its own, check the Knock Sensor. Over time they rust. I have had the repair done on my 2 subies (a 97 and a 99).

The CEL will go out on its own if you have 4 starts with no misfires. If the knock sensor is out, rapid accelleration or steep hill climbing will make the light come back on as the timing advances and the sensor does not ****** the timing for you, so the knocking becomes a misfire.

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