Continuing my adventures with my 97 XJR... I'm pretty sure I need all 4 O2 sensors replaced. I have a Blue Driver I'm using for live data and I'm not seeing a whole lot of activity from any of them. Checked the plugs for voltage and I'm getting power, 12V for the heater and 5V for signal. The sensors are outputting 0.1~.9ish, unreliably.

My question is, where do I even find them anymore? I live in eastern America. I checked Rockauto, Autozone, Advanced Auto, Parts Geek, no luck. Amazon has some NGK which would be nice but I don't trust they're genuine.

I'm looking at this website right now, but they're in Britain! Seems odd that there's none left in America. https://www.autoreservejaguar.com/xj...m-quality.html

 

Forgot to mention, 3 of them are replacement NTKs and one is actually an original Lucas! (made by NTK) I thought that was kind of neat.

 

Just went through something similar. Multiple places out of stock. Even ordered from one place that claimed stock and got refunded a few days later because their inventory was wrong. Wound up finding a used one on eBay. I did order 2 Walker branded ones via Amazon, but they claim 4 weeks out. We’ll see if they show up some time next month or if I get refunded again.

 

look


here

 

Normally I would say Rockauto, but they are out of stock on everything. The NTK's are discontinued now.

 

There is 1 fuse that provides power to the electrical heaters in all 4 to read properly

looking ....................... # 14 / 10 amp right engine bay fuse box

Bocsh # 13789 for connector ready replacements of the original Denso's

The O2 sensors on the X300 are all 4 the same and are the different platinum version

 

You meant to say “Titania” type sensors.

 

i purchased mine here in Aus made by an Australian company GOSS.

 

Well, the ones I ordered from Auto Reserve Jaguar arrived, I installed them today. But they all read 0 volts. This is some weird Jaguar calibration thing right? I need to get them set at a shop.

 

They must be heated to a operating temp before they will read

Checked the O2 heater fuse ?

 

Ah ok, that's it then. I only ran them for a minute or so.

 

I think they work by changing resistance, not voltage. They are different from most O2 sensors.

 

True ,

They are given a very precise 5.0 reference voltage from the ECU and read a resulting resistive modified voltage

The other generate a voltage from a ground wire zero reference

See page X

 

An update - I am still waiting for a shipping notice on the Walker sensors ordered on Amazon. Nothing yet, so if you're in a hurry.... buyer beware.

 

I have a couple of spare used sensors you can barrow or keep to play with

They came off a salvage X300 of unknown working order

PM me if interested.

 

I appreciate the offer. It’s nothing pressing at the moment. Though I will say I just happened to snag a Walker branded one from RockAuto today.

 

I also just snagged a walker sensor from RockAuto, apparently the last one in stock. Will update on quality on new one, currently one of my downstream's showing 0v and 24.22% short term trim constantly.