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Joined: Mar 31 2018
Posts: 22

I decided that my bank A O2 sensor was not " flip flopping" as quick as it used too using my Nanocom.
So purchased an AMR 6244 from Island as my chassis code is WA38.
Fitted the new sensor which is physically longer than the NGK that was installed, only to find that the car didn't seem to run well.
I've now refitted the old one and she back to running smoothly.
So on looking at the "new" sensor it has a marking on it of; FAE 77350 and on Googling this it turns out it's a generic sensor for 4.6 Range Rovers built between 1994 - 2002.
The Range Rover P38 parts catalogue shows three differing sensors depending on chassis numbers, surely this means that a single generic sensor is incorrect for my vehicle.
I'd be interested in others opinions and whether only fitting Ngk Sensors is the way to go.
Nick

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Joined: Dec 29 2016
Posts: 197

Interesting that it cross references as a generic sensor as there's 3 different types of plugs on the sensors so a generic one wouldn't fit all P38's.

If it's running like a bag of spuds with the new sensor it definitely sounds as if it's not working properly. I'd be returning it to Island 4x4 personally. When I did mine I bought genuine ones off eBay, have a look and see if you can get Bosch ones.

David.

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Joined: Mar 22 2016
Posts: 1056

I bought a generic sensor off eBay, right plug ect, when I plugged in nano, it was doing nada,, turns out it was a gems one, if yours is a Thor one it won’t work in a gems.

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Joined: Dec 30 2015
Posts: 3160

There's no such thing as a generic for all years, GEMS uses 5-0V Titania sensor while Thor uses a 0-1V Zirconia. Not sure what the difference is between an early GEMS and later GEMS other than the plug though but there must be a difference.

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Joined: Mar 31 2018
Posts: 22

Thanks guys, no I don't understand either.
Plug was the right colour and shape, only issue on first attempt to connect the plug and receiver was that the pins pushed out of the plug.
Pushing them back in with needle pliers seemed to work but it didn't bode well from the off.
Mine are now at least ten years old and have done 110K miles so I think I'm going to bite the bullet and get a pair of GKN sensors.
She is a 97 Gems so at least I've only got the two to get LOL !!

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Joined: Jul 12 2016
Posts: 746

rhyl46 wrote:

Thanks guys, no I don't understand either.
Plug was the right colour and shape, only issue on first attempt to connect the plug and receiver was that the pins pushed out of the plug.
Pushing them back in with needle pliers seemed to work but it didn't bode well from the off.
Mine are now at least ten years old and have done 110K miles so I think I'm going to bite the bullet and get a pair of GKN sensors.
She is a 97 Gems so at least I've only got the two to get LOL !!

Mine's a Thor and still only has two sensors

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Joined: Dec 30 2015
Posts: 3160

It's only the US spec ones that have 4, two pre-cat and two post-cat. Same as only US ones have the Secondary Air Injection junk on them too.

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Joined: Mar 31 2018
Posts: 22

Thanks Gilbertd, not having owned a later P38 I thought that they all had four.
We never stop learning but I suppose that's why why are on this forum as it's a great source of knowledge with helpful people.
Many thanks Nick