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  #1  
Old 03-04-2016, 11:05 AM
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Injuhneer Injuhneer is offline
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Since O2 sensor info is scattered all over the place maybe it would be good to get most of the info in one place. I'll kick it off.

1) The 25044 NTK sensor listed in most parts sources has the wrong plug for my '97 D1.

Question:
I made a monitor panel for my O2 sensors in Torque. They are number 1x1, 1x2, 2x1,2x2. I assume 1 is the odd cylinder side and 2 is the even? Which is front vs rear?
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Old 03-04-2016, 03:23 PM
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Quote:
Originally Posted by Injuhneer View Post
Since O2 sensor info is scattered all over the place maybe it would be good to get most of the info in one place. I'll kick it off.

1) The 25044 NTK sensor listed in most parts sources has the wrong plug for my '97 D1.

Question:
I made a monitor panel for my O2 sensors in Torque. They are number 1x1, 1x2, 2x1,2x2. I assume 1 is the odd cylinder side and 2 is the even? Which is front vs rear?

You can solder on the correct plug, the sensor is the same. No butt splice connectors, has to be a good solder joint.

As you're sitting in the truck I'm pretty darn sure these are the positions of the sensors.
1x1 1x2


2x1 2x2
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Old 03-05-2016, 09:17 AM
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1x1 is the drivers side pre-cat. 2x1 is the passenger side pre-cat.
1x2 is the drivers side post-cat. 2x2 is the passenger side post-cat.
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Old 03-05-2016, 10:09 AM
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Quote:
Originally Posted by mbrummal View Post
1x1 is the drivers side pre-cat. 2x1 is the passenger side pre-cat.
1x2 is the drivers side post-cat. 2x2 is the passenger side post-cat.
This is how I remember it also.

As Brett mentioned you can definitely solder on the connectors to the O-2 sensors. I've had pretty good results with this.

One other thing to note is that the '96 DI's actually have a different connector from the '97 and later DI's. I'm pretty sure the sensors are the same but the connects are different. At least I've been able to swap the connectors and have them work. For the GEMS engines I'm not sure the connector swap is really worth it anymore. The last few O2 sensors I got were around $80 at Advance Auto parts for the correct ones.

Another thing to note is that the 14CUX trucks use different O2 sensors from the GEMS trucks. They use a 3 wire titania type O-2 sensor. While the GEMS use a 4 wire sensor (I'm not sure if the GEMS uses a zirconia or titania sensor however). So these are not interchangeable. There is a pretty cheap alternative for these sensors though. You can use the Bosch 13021 sensor. Which I believe is used in a mid to late '80 Sentra. Again this will require swapping connectors. I'm currently running two of these in my '95. I got them for around $40-$45 each, and they seem to be working well according to the Rover Gauge.
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  #5  
Old 03-16-2016, 10:57 AM
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I did connect the '97 plug to the 25044 sensor. Unfortunately I can't tell if it works because the ECM shows no change but that is a different issue.
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  #6  
Old 03-16-2016, 10:58 AM
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So this 25044 sensor can be adapted to any of the 4 positions?
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Old 03-16-2016, 12:33 PM
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Mike, is your '97 PRE-AEL or does it have the AEL system? That makes a difference. The 25044's are for AEL trucks. They made the change somewhere in the middle of 1997.
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  #8  
Old 03-25-2016, 11:05 AM
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What are the defining differences in the components to determine which I have? Is there a VIN start number for AEL?
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Old 04-19-2017, 11:30 AM
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My '97 is pre-AEL I believe. Round evap canister in the engine bay? Some other telltale?
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Old 04-20-2017, 09:19 AM
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Round canister is pre-AEL. Square is AEL.

https://landroverforums.com/forum/di...02/#post567770
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RAVE in pdf:
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Discovery I exploded parts diagrams....
http://www.allbrit.de/NAV.cfm?SPRACHE=EN&PAGE=491338
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  #11  
Old 04-21-2017, 12:45 AM
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Quote:
Originally Posted by WaltNYC View Post
Round canister is pre-AEL. Square is AEL.

https://landroverforums.com/forum/di...02/#post567770
Pre-AEL it is then. Is there a definitive cross reference to a sensor for the Pre-AEL? Earlier it was mentioned that they may be the same except for connector.
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  #12  
Old 04-21-2017, 12:49 AM
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Quote:
Originally Posted by WaltNYC View Post
Mike, is your '97 PRE-AEL or does it have the AEL system? That makes a difference. The 25044's are for AEL trucks. They made the change somewhere in the middle of 1997.
Mine are all 4-wire but it is pre-AEL. Any idea what the part number should be? Is it the same Lucas sensor used on Jaguars of the same era?
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Last edited by Injuhneer; 05-15-2017 at 08:48 AM.
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  #13  
Old 01-05-2018, 01:34 PM
eXtraDutyDisco eXtraDutyDisco is offline
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I need to replace 2 of my sensors, and I'm considering replacing all 4 while I'm at it. Is there any preference or experience with some of the cheaper options? I could buy from AB or RN, but there's also a few options sub-$30, but I don't want to use them if they are junk.

http://www.carparts.com/details/Land...B&gclsrc=aw.ds

https://www.autopartswarehouse.com/s...B&gclsrc=aw.ds

Any opinions?
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  #14  
Old 01-05-2018, 02:11 PM
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I've used NTK/NGK sensors on my D1. They were about $60 each, I forget whether I bought them on ebay or Amazon, but 2 years later they are working fine.
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  #15  
Old 01-08-2018, 01:38 PM
eXtraDutyDisco eXtraDutyDisco is offline
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Quote:
Originally Posted by Tugela View Post
I've used NTK/NGK sensors on my D1. They were about $60 each, I forget whether I bought them on ebay or Amazon, but 2 years later they are working fine.
Thanks!
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  #16  
Old 01-08-2018, 01:45 PM
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I'll need to look at my notes but I bought some sensors that are either D2 or Jag. I only had to move the pins from the included plug to the originals from the old sensors.

Plug-n-play baby.
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  #17  
Old 01-08-2018, 01:55 PM
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I put these in my 98 Disco
https://www.amazon.com/NGK-25044-Oxy...or+-+NGK%2FNTK
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