maximaxi

Mine crapped out around 35k and 3 years. It was an OEM knock sensor, replaced with another OEM knock sensor. Car has 285k now.

Also, this helps a LOT with the removal and install. This particular one is a 6-point, and it worked ok, but a would've probably been easier to get on and off the bolt.

But anyway, I just wanted to know if 30k was a typical service life for the knock sensor.

Rit

iTrader: (3)

20 years, and 120K miles, and still going strong.

JvG

I had issues with this issue as well.

I replaced the fuse with a new one.

No more issues.

Seriously.

I had an oxidized fuse, and sanding it did not help.

Evedently the electrical resistance from the oxy sensor and the oxidation is high enough to set the cell.

So replace the fuse with a new one.

This could be a cheap fix. Worked for me!​​​​​

H_MAX

which fuse are you talking about exactly? Mine's a California Car with the EGR so the only way to get to the knock sensor is to remove the UIM. Trying to avoid that if I can...

JvG

I wasn't paying attention.

Somehow I read oxy sensor.

My bad.

Regarding the knock sensor.

I bought one for 17 dollars through e bay.

It is still good 35k miles later so far.

CS_AR

I think if a car passes through a dealership and the engine is washed down, the likelihood of the valley being partially filled with water will ruin a knock sensor. I just don't think they like to be submerged in water.

CS_AR

On my last KS failure, I relocated it to the point on the UIM by the throttle body. I wanted to give it try at different location. Actually KS relocation this is a fairly popular Z-32 trick. Can you tell me where its located?

JvG

Mmm..... CS-AR attached the knock sensor just behind the throttle body.

CS_AR

Its like one of those Nissan Frontier or 300zx insider tricks.. People sell kits to relocate the knock sensors.

http://gmaili.net/nissan-frontier-kn...ation-kit.html

BransAm

What does relocating this knock sensor do?

Violator

Make it easy to access if you ever have to replace it, easier than putting it back where it came from. The knock sensor is below the upper intake manifold and it's a PITA to get to, have to use special tools to reach it

BransAm

I replaced mine without using any special tools besides a ratchet and a extension. But i was wondering if relocating it gave some type of performance advantage over its original location. I remember the SpecV i used to have it was recommended to relocate the sensor for some kind of issue with those engines that was caused by a over active sensor or something like that. I forget its been so long ago.

JvG

I figure that the Nissan engineers put the sensor where they did for a goid reason.Relocating it most likely would result in a slight decress in performance, not an increase.

That said, if the new location is "good enough",
I would buy a new sensor and conector cable.
I would disconnect the existing cable, then abandon that cable and the existing sensor.

Much easier.
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H_MAX

I have to agree with JvG here... I think it's fair to say the knock sensor being stuck right on the block is so it can get the most accurate of readings.

That being said, moving the knock sensor would make sense if I didn't care for those ultra-precise readings and just needed to be able to easily replace it when it fails, which seems to be a bit more common than actually getting a knock in the engine. In that case however, I'll just leave it where it is until I have a reason to remove the UIM. It doesn't throw a CEL, and as far as I can tell doesn't change the engine's performance. Or does it?

CS_AR

Some interesting reading about Z32 knock sensors that are the same part used in our 4th gens at the link below.

https://www.z1motorsports.com/oxygen...or-p-1727.html

Note that I only use 93 octane fuel. The cars are not driven hard and don't think I've ever heard a knock.

The KS relocation idea started out as a test to determine if a new sensor would cure a CEL code. It resolved the code problem and the car ran better after the fix so I decided to leave it alone until I have some reason to get under the UIM. So its a temporary hack.

A buddy at work has a Z32 and needed a new sensor, so that's how I learned that a lot of other Nissan owners have performed the KS relocation trick.

Note in the video the factory location is the best..