Replace knock sensor on 2.5T

[Sheik Jabooti]

Hi guys,

Wondering how difficult it is to replace the knock sensor on a 2007 GT Liberty? Is it easy to do and whereabouts is it? I'm pretty low on the mechanic scale but I know how to use a torque wrench.

Was keen to do it myself to save the inconvenience (and cost) of leaving my car in the mechanics for a day.

Also any tips on the best place to source a new knock sensor?

(Also is there a Haynes manual for these cars?)

Cheers.

[Sheik Jabooti]

Seek and you shall find he said...

and I did.

Found an awesome set of shop manuals for the legacy here...

http://people.csail.mit.edu/ilh/vacation/

So the knock sensor replacement looks simple enough though any tips / opinions would be appreciated.

[AlpineRaven]

Ive done it a few times.. the hoses and wiring might be in the way so navigate your way around it... it would be an bogus if you have small hand!
Cheers
AP

[jp928]

On my 08 gtb, the EcuDatascan says there is NO knock sensor data .....ignition correction and total timing is available, but not Knock sensor????
The sensor on the 05 Outback I had before was bolted on top of the block, left of sensor, bit behind the middle.
jp 08 gtb 6mt wagon

[Sheik Jabooti]

On my 08 gtb, the EcuDatascan says there is NO knock sensor data .....ignition correction and total timing is available, but not Knock sensor????
The sensor on the 05 Outback I had before was bolted on top of the block, left of sensor, bit behind the middle.
jp 08 gtb 6mt wagon

I guess your ecudatascan is not reading the right data. If your knock sensor were dead you'd definitely be throwing a CEL fault code.

[jp928]

Maybe its not seeing 'knock sensor', but it does show 'ignition correction' amongst the list of available data, so maybe thats it? It has a boost item , so it knows that side. I have another version of the workshop manuals that covers the GT engine, and purports to be Gen IV, and it shows NOTHING about a knock sensor, but the manuals in the link above do show it.

jp 08 gtb 6mt wagon

[Sheik Jabooti]

Maybe its not seeing 'knock sensor', but it does show 'ignition correction' amongst the list of available data, so maybe thats it? It has a boost item , so it knows that side. I have another version of the workshop manuals that covers the GT engine, and purports to be Gen IV, and it shows NOTHING about a knock sensor, but the manuals in the link above do show it.

jp 08 gtb 6mt wagon

I've tried 3 different ODB connectors and only the Tactrix one has specifically shown the knock correction and knock sum.