Replacing all the sensors on my 01xj as a preventive measure. I do this every 3-4 yrs on all my 4x4’s. This time I used all ngk sensors and the map sensor was bad out of the box.
Im curious if anyone else is having issues with ngk and if this is a company trend or did I just get a fluke.

 

Can't speak to an '01, but my '88 likes them. Most comments I see are positive. A bad one can slip through every now and then.

How did you determine it was bad?

 

When I replace the sensors I do them one at a time, then test drive, instead of all at once. That way if there is an issue I know right where to look.

After replacing the map sensor the jeep wouldnt go over 10mpg without sputtering, then the CEL came on indicating “map sensor low voltage”. After putting the old one back on it runs perfect again.

Been using ngk parts for a very long time and this is the first issue ever so hope its just a fluke. Got it on amazon so should be no issue with warranty…

 

Was it fulfilled by Amazon or a 3rd party?

I ordered a NTK O2 sensor to have one on hand and Amazon (3rd party) shipped the wrong one. It was in the right box (pretty beat up) but had the wrong connector. Most likely a return (and possible swap by the previous buyer). They did replace it with the right one.

 

3rd party. New one has been shipped already and they gave me a prepaid shipping label to ship the old one back. So far easy peasy.

One interesting thing about the new map sensor is it does not have a hard plastic back cover like all the ones im used to seeing. Just a gooie sticky gell substance where the cover should be. Read a post on here yesterday where someone mentions this too. Guess its normal now?

 

That seems like a waste of money, Used oem parts are often better than the chinese replacements, as demonstrated by getting a bad one out of the box. Ordering off Amazon, you also have the problem of counterfeit parts. Map and temp sensors don't go bad very often.

 

Who said they were Chinese parts? The crank sensor, cam sensor, tps, and battery sensor were made in usa. The map sensor was mexico. Temp sensor was made in Japan which I consider better quality than US made parts in most cases. Have not gotten the o2 sensors yet so not sure where they are made but I will find out soon.

Counterfeit parts? Thats a risk you run in any transaction these days and in any business. Just have to do your best to source from a reputable
seller and cross your fingers.
Not to mention too, that quality everywhere seems to have dropped off a cliff the last few years.

 

I just don't see the point in replacing sensors which aren't prone to wearing out and generally either work or they don't. Especially with the unknown quality of the replacements, even the "US made". The only sensors I've ever replaced on my 89 are the O2 sensor and the TPS. I only replaced TPS because I was swapping in an automatic and I just grabbed one at the junkyard. Literally every sensor on my Jeep is still oem.

 

Replacing O2 sensors every 3-4 years seems a little excessive if you ask me.
I did about 11 years ago on my '00 just assuming they were original and had about 150K on them.
Which seems to be the upper end of the life of them best I could tell.
Used NTK's from my Napa for all 4, CA Emissions, and still good to this day best I can tell.
I don't know if you can still get them but a few years ago bought a Mopar Map Sensor, even bought the little hose, for "stock".
Basically cause the bad out of the box for aftermarket parts and thinking sooner or later Mopar will end up being N/A.

 

When I 1st read this, my immediate thought was, "sounds like an expensive hobby"! In 10 years (or so) running 3 XJ's I've only replaced a CPS (with the one from my parts Jeep), although I'll exclude ABS sensors form that! In my book, sensors are not service items/consumables, but components you hope you'll never have to replace.

Outside XJ's, since 1998 I've only replaced one CPS - although my KJ has a voracious appetite for ABS sensors (&, unlike an XJ, they're a real pita to change).

I'm sure OP has his reasons, but there are other ways I'd prefer to spend my time, money & effort on my XJ's.

 

Yea it has to do with different philosophies on doing things.

From my perspective im surprised more people with old vehicles dont change sensors on a regular basis. In my experience they do fail on a semi regular basis and I would rather change them when I want to, rather than on the side of the road or along a trail when I have to do it.

Im pretty **** on my maintenance and maybe a little ocd on it, but it works good for me.
Other maint I do is every 5yrs I change all rubber hoses; coolant, heater, trans, power steering, fuel, and vacuum.
Brake fluid changes annualy, coolant and t-stat every other year, power steering every other year, ball joints and link ends every 5 yrs, all relays every 5 years, etc..

 

Well, we're agreed on the 1st statement - & I'd rather replace parts when it suits me so, up to a point, I'm all for preventative maintenance but I'm not going to routinely replace things which, in my experience, seldom fail. as I said before (ABS sensors aside) I have only ever replaced 2, probably 25 years apart. Mechanical components are also known to fail, but who routinely replaces engines or transmissions, or even their major components?

Many of the things you change, almost for the sake of it, I have never had to replace & doubt I ever will, so I guess we'll have to agree to differ but, mercifully, we're not all the same - as otherwise, there'd be no ideas th exchange. Long may that continue & we each keep happy doing things our own way.