Hi
I have a 1998 Nissan Maxima. My car dealer has estimated 4 hrs labor to replace the knock sensor and 1 hr labor to replace the O2 sensor. Is this reliable or is he ripping me off?
Your help would be appreciated.
Thank You BR.
He's quoting you book labor rate. In reality it's about 15 min to change each. The factory says to remove the intake to get to the KS, that's why the book rate labor is so high, but in reality you can get it out w/o taking it off.
Hi Jim,
THanks for the reply. Do you which popular auto store might do it fast. This guy says it takes them 4 hrs to replace it.
Thank You BR.
Find the one with the 98 pound weakling wielding the wrench. The knock sensor is under the intake manifold. You can see it but the space is really tight. you might be able to reach in and touch it if you have really thin hands. This is why the prescribed procedure includes removing the intake manifold. When I changed the KS on my '96, my wife (98 pounds) was able to reach in and thread the bolt into it. Others have had some success with wrenches with long extensions and u-joints.
Just out of curiosity, why do you want to change it? A good KS will occasionally throw a code anyway (probably why it doesn't light the check-engine light). Reset the codes and drive it for a while & see if the code comes back before you do anything to it.
You should go ahead with the O2 sensor though. That's a real fault and probably what lit your engine light.
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