How to replace knock sensor in 1995 NISSAN ALTIMA?

Have you ever run out of oil? Do you change the oil and filter regularly? That sounds like big end bearings knocking.

Knock Sensor location in the link.

https://www.google.com/search?q=2005+nissan+altima+3.5+knock+sensor+location

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Melvia, Knock sensor located under the intake manifold between cylinder #2-3 I believe, hard to change with out removing intake manifold, but can be done. Check the attached links,instruction and guides, Good luck
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Knock sensor is located very close to oil filter, in fact, to make it easier to reach, oil filter may need to be removed. Held in by one 10mm bolt.

PO345 is the cam shaft positioning sensor and PO325 is the knock sensor. Check your starter and your battery.

Just spaners

could be the coil if you have no spark. follow the HT leads they will go int a small box, that is what turns 12v into the high voltage to make the spark.

It is located on the back side of the engine toward the firewall in the middle of the engine block:)

change ur Airflow sensor buddy. thats the only problem. And if yet it doesnt work then check ur crank sensor....

It is where the dashed circle is at the end of the line...


Email me at [email protected] for a larger pic....we can't post them that large here.

This car does not have a timing chain, it has a belt. The reason your knock sensor and O2 sensor is coming on is likely because your timing belt has stretched which caused it to jump time. Since the engine is not properly timed the fuel mixture is off and the engine is pinging/knocking and that is why the knock sensor is coming up. The sensors are doing their job and keeping the engine from blowing. You should put a timing belt on the car ASAP. I recommend changing the tensionors while you are at it.