I am considering purchasing new Oxygen Sensors for my 2006 XJ8 (4.2 litre non supercharged) and I am wondering what brand to buy. Does anyone know what the OEM brand is.
My Oxygen Sensors have Blue and Green sheathing of the wires. Different color for the front and rear sensors.
Thanks

 

Hi Dave,

Denso is the OEM of the AFR and O2 sensors. The wire colors of new ones may or may not match your old ones, though.

You can find the Denso part numbers for your sensors at the link below, then use those part numbers to shop for the best prices online or from your local auto parts stores:

Find My Part | DENSO Auto Parts


Cheers,

Don

 

I doubt there is much difference life or quality wise. Both are good brands. The only thing I've found is that you should replace kind with kind. IE don't mix a new bosch rear with the old denso front etc. Go all bosch or all denso. I've seen them throw CEL's on other makes as the output speed of each 02 sensor varies slightly by manufacturer.

If replacing all of them, find the best price you can, and if you want to save $$ and are handy, you can buy the generics that fit and wire them in yourself.

 

I just went with the Denso's Oxygen Sensors | DENSO Auto Parts they are what the factory uses
got them from here Discount O2 Sensor - Top engine performance at bottom dollar prices

 

Last night, four oxygen sensors were delivered. Maybe these photos will settle the difference between Bosch and Denso.




In short, the only difference is price: the Bosch cardboard box costs more than the Denso cardboard box.

 

Hi Zazzy,

Is it only the little tube of anti-seize that is marked DENSO, or are the sensors also marked?

In this age of globalization, most or all of the parts suppliers are purchasing from one another in order to offer parts for the widest array of vehicles possible. I recently couldn't find an OE Walbro fuel pump for an XJ40, so I ordered an Airtex/Wells (a top tier Ford supplier). The pump in the Airtex/Wells box was clearly stamped Walbro!

Cheers,

Don

 

I only opened one box, looked, took a photo and put the boxes in the garage. I'll check later.

If Denso is in the business of packaging anti-seize, it's a bit odd that Bosch would buy anti-seize from Denso so they could package their O2 sensors with Denso labeled anti-seize.

 

Got home and opened the box. The bag that the sensors are packaged in are a zip lock bag with a stick on white label with part numbers. The O2 sensors have no marks.

I have a tin foil hat theory. I own a 2005 F350 with a V10. The OEM O2 sensors for the truck are Bosch. Ford owned Jaguar back in 2004 and the OEM O2 sensors for Jaguar are Denso. I bet the parts are one in the same. The only thing that's different is the packaging and possibly the warranty.

 

Hi Zazzy,

Your theory could certainly be true. In my experience automakers seem to use sensors made or sourced by the same company that made the engine management system. Our '93 XJ40 with Lucas EMS made by Bosch had an OE O2S by Bosch. On our '04 X350 with Denso EMS the original O2Ss are Denso. I've never had a problem using replacement O2Ss of the original brand for the vehicle, but others who have tried different brands (e.g. Bosch swapped for Denso) have reported problems.

Cheers,

Don

 

There is a difference between the Denso and Bosch wideband. It's has to do with it's lambda voltage. If you see any type of problems with A/F trims or MPG, you need to find some Denso replacements.

 

I returned all four O2 sensors for the XJR. The one in the picture above was correctly packaged. The other three had the correct boxes but all three had different O2 sensors in the box. One was not bagged in plastic and was about twice the size of the "matching" sensor (obviously not a matching sensor). The other pair was about the same size but visibly different. The bag it was in also had a different part number and the connector was different. The box it came in also was taped up on one section and "fu##" was written in pen on that side of the box.

The good news is that the two for my truck are packaged correctly.

 

I bought a front Denso O2 sensor off Ebay for my daughter's Subaru. I installed it and had no joy. Replaced the rear O2 sensor - No joy. Replaced the Cat - no joy. Brought it to the dealer - they said ECM is bad. Replaced the ECM no joy. The OBDII was throwing codes - but they were only sort of right.

Pulled up the factory manual and fault traced. Metered all the relevant wires. Conclusion was front O2 front sensor was bad. Bought one locally, Denso and installed it. CEL was gone.

I looked carefully at the Ebay O2 sensor and it had two incompatible part numbers stamped on it. One number was for an earlier model and the other for a later model. The two models take different O2 sensors. Had the Denso stamp on it - looked real. My conclusion was the O2 sensor was a fake and it worked enough to provide some data - but not correctly for the car's computer, the OBDII reader or the dealer's computer.

Lesson learned - buy parts from well known and reputable sources, which can be on Ebay, but be smart. The place you mentioned is now on my NO-NO list. Appears like there are many fake parts being sold out there. I learned my lesson at the tune of $700.

 

I bought two rear Denso O2 sensors on Ebay and two front Denso O2 sensors on Amazon.

One of the front failed so I replaced both with the original 106K mile sensors and returned the "new" that I bought from Amazon for which I did get a full refund.

One of the Amazon sensors had "spidery" letters etched on the bolt part and although it looked clean it was clearly used.