Knock sensor replacement

Thanks, that's expensive. Can I just buy the OEM version of it and have some mechnician replace it for me? I don't know whether there are some repair shops that can do this for customers using customers' own parts.

Bluelightnin6 and stevew84, thank you guys so much! I'll try it.

I need to replace the knock sensor but I do not know where it is located in the engine. I have the part ready and I took the engine apart but I still can not find the location of the knock sensor. Please help!

I have a NISSAN MAXIMA Automatic 2001. Under acceleration it hestitates and sputters once I reach 40mph. If I get off the gas and let the gears change and give it gas gently the car doesnt sputter or hestitate only under heavy acceleration. Now I have done the following
CHECKED
KNOCK SENSOR
MAF SENSOR
FUEL INJECTORS
GROUND
FUEL FILTER
TIMING
BASICALLY ALL SENSORS
SPARK
tune up
Now the funny thing If I turn it off and turn it back on and rev it pass 4thousand RPM 4times. The car drives fine. But if I turn it off and turn it back on its sputtering when I reach 40mph. I'am thinking something is resetting once I turn it off. Please help

NO check engine light at all. It hestitates and sputters if I try to accelerate it. If I turn it off and back on and rev it 4 times pass 4k and start driving its fine. No alarms no cutoff switches. The car was a gift

It revs fine when in Park Or Neutral

I have a 99 Nissan Maxima GLE. It has about 80,000 miles on it. The problem is that while idle it feels as if the engine is dropping. It also sometimes does it while I'm driving (30 mph). As if its hesitating to go faster.
But basically the problem is when I'm just idle, still in drive, but waiting at a light. It just drops and sometimes it does is 5 times in a row.
The mechanic said it was the knock sensor, so I had that replaced. It was good for about a week, but now it does it again. I've read some things that a knock sensor is if you hear knocking sounds. My car does not make any knocking noises. It is silent, but the car just drops.
Any ideas?

Thank you.

Not too sure why a mechanic would up and blame a knock sensor right off. It usually only trips as a result of something else. Sounds like he may have been farming you for some additional repairs in the future. The knock sensor may be throwing code as a result of a heavy sputter in your idling condition. I would venture to guess that you are probably going to show some other codes if you have it diagnosed with a reader. Most likely you will see a lean condition code, or possibly some random misfire codes. Tough thing is to say specificly what is causing this. Your best starting place is to have all of the intake vacuum points checked. Once you determine it to be something else(unless that is the culprit) move through the rest of the combustion cycle.

This is one of those issues you can find yourself swimming in information for, but may also lead you to a last possible problem solution. I'm working on a similar problem right now with my 01 Altima, and only have a couple possible culprits left. PM mem if you interested in the specifics on that one.

Good luck with your repair

The car was check with a meter. The code came up to change the knock sensor. Mass air flow sensor. The parts are quite high knock sensor in peticular 220.000 is there a web site for these parts?
Should I put back original parts? The labor can be very high do to the dropping of the transmission?

I was having problems getting this car started. It turns over but will not start, most of the time draining the battery. I eventualy get it started, most of the time push starting it. I was told to replace the cam sensor and the knock sensor, wich I did. I also replaced the starter, battery, cables, plugs, intake gasket, fuel filter etc. Etc. Let me also mention, once the car is on it runs great! Lots of power, no problems at all once it's on. Whan can you enlight me with on this situation? Please help me, I love this car.