those are for the AELS with the gray connector, I do not have AELS.

 

Sweet. I know which ones to get now. I do have AELS.

Thanks Tom

 

Ah, then you want NTK 25017..all 4 are the same.

 

Thanks TOM, this is the kind of information all of us need. Great price, you are awesome when it comes to Rover knowledge.

 

Can anyone confirm that the two are actually the same sensor with different connectors? Everywhere I look this seems to be the case. I don't know why a different connector = double price but I am looking for four of these and $250 vs. $500 is worth splicing the connector to me.

here are the links to autozone (for pics, not price):

http://shop.advanceautoparts.com/1/2...art-25044.html

http://shop.advanceautoparts.com/1/2...art-25017.html

and from the parts fair website:

Description: Oxygen Sensor
OEA, Front & Rear of Cat 4 Wire SensorFits: 1999 Rover Discovery 4.0 (Engine: 50D)
25017 NTK has a black 4 prong plug - Some OE sensors have a larger grey plug - 25017 NTK can be used but the plug must be cut & spliced
http://www.autopartsfair.com/rover-e...injection.html



Is this correct? Can anyone confirm who has actually used 25044 in place of 25017?

 

well that was part of what I was actually trying to figure out. I don't think they are the same. the reason is because the emissions system that each one works with is different and will cause a different reading (however this reading may not be enough to cause a CEL). What I can't tell you is how each one is physically different, like thread size or reading resistance, I can tell you they use different connectors and that no matter what brand you choose the black connector sensors will cost more than the gray (well some of the higher priced places charge the same for both) my biggest question was if I could use the cheap ones ($20 universal) and wire them up. The answer I got was the universals will work but I was also told they are a different thread size, so with my original question, I really am not sure.

 

They aren't double the price.
25044 are $60
25017 are $96 (based on a 3 second google search. Spend a bit more time and you might find them for less)

Land Rover and NTK both spec different ones depending on AEL or not.
I can't see any reason they would if they were the same sensor.

Some people have had good luck with universal sensors, others have ended up having them not work properly. Depends on how much of a gambler you are.

 

Roll the dice,spin the wheel, round and round the wheel goes, where it will stop, nobody knows.

Sounds like that applies to a lot of Disco's on here. The wheels also spin when you flip one over.

Do you feel lucky?

 

I have a 93 Disco1 (non us) and was told that i need a prc7062 sensor...I am still searching and maybe you can help me by giving me the best alternative substitute. I have a 3.5L V8i engine. This was a japanese import to the Philippines. Parts here are quite expensive so i am trying to source from North America...can you help me on this. Furthermore i was wondering if my service technician's diagnosis of my problem was correct. According to him my fuel mix becomes too rich at high temp levels causing my engine to choke and therefore die as some point. Whenever this occurs i just restart the truck and it runs normally again. is this issue caused by the sensor?

 

I believe your engine is controlled by the 14CU engine Control Module. Can you confirm this by somehow looking behind the glove box. WAIT, is your truck Right hand drive or Left?

either way, here is a quick addition to the previous info...

these Part numbers are from the manufacturer of the oxygen sensors, NTK and not from some supply warehouse:

NTK25044 is with AEL (four wire)

NTK25017 is without AEL (four wire)

NTK25016 is for everything else 1995 and prior. (3 wire Titania)

Please excuse my ignorance of the Asian market components but I am certain the 25016 NTK's are for the Lucas Hot-wire based 14CU and CUX ECM