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View Full Version : MK4 knock sensor same as MK3?

tubbie
01-31-2008, 09:33 PM
Are they interchangeable?
Kruso
02-19-2008, 01:12 AM
No they're not, physically the 7M and the 2J KS have completely different and the harness for them is not interchangeable.

Kruso
annoyingrob
02-24-2008, 06:15 AM
1JZ and 2JZ sensors however ARE the same.
Whasian
03-05-2008, 08:11 AM
The jz knock sensor and the 7m knock sensor are interchangable. But you need to wire in the jz plug in order to use them. I just finished wiring them into my harness and everything. I will post you a picture to you can see it better.

Whasian
supramanocnsd
03-17-2008, 08:30 PM
^^ BAM he got it.. but why would U do it.. the MKIII is less expensive....
Whasian
03-19-2008, 12:49 AM
Because the plug on the mk4 sensor is a tighter fit. I always broke my 7m sensors, but never broke the mk4 sensor. and I think the jz sensor wire is bigger.

Whasian
supramanocnsd
03-22-2008, 11:33 PM
^ hmm did not know that.. I have not spent much time on the mkiii I have always lowned MKIV TT's... I did a few na to TT swaps for buddies and did a head for a 7m but never new that .. thanks for the info bra
Whasian
03-23-2008, 12:58 PM
another note, I used usb wire for the sensor wire. I wired directly from the ecu to the knock sensor. It works really well.

Whasian
supramanocnsd
03-24-2008, 11:25 PM
^^^ No way... lol did you do this right.. soder and shrink wrap... a usb wire.. lol thats cool man...
Whasian
03-25-2008, 10:06 AM
^^^ No way... lol did you do this right.. soder and shrink wrap... a usb wire.. lol thats cool man...
Yea, of course I did it right. I bought a new knock sensor repait kit from champion (I still have the part numbers if you want them) and soldered the repair kit to the wires inside the usb, then grounded the shielding. I heard awhile back that guys were doing this with co-axle cable (the stuff used for cable tv) But the actual wire used for transfer is smaller than the usb. I can take some pictures of the setup so that you can see what it looks like. The hardest part was soldering the shielding to a wire, but you can just crimp it if you don't want to go that far.

Whasian
supramanocnsd
03-26-2008, 04:57 AM
^ cool I dont need the part numbers but you can post them for others that want to do this.. I run MKIV so I do not need to do this... I just thought it was interesting...