Hello I am trying to replace my downstream O2 sensor with Denso 234-4265 & 234-4266. Discovered they are not direct fit as OEM. Specifically the plugs are not direct fit / same size. My truck is 2007 MY manufactured in 2006. Has anyone ran into the same problem? What's will be the direct fit aftermarket sensors?

 

There are 4 different sensors for the LR3, MHK500840 for each of the front ones and MHK500910 Rear left hand and MHK500960 Rear right hand, all of these have different plugs so you can't fit the in the wrong position. They're also listed for 05 - 09

But there is one other, pt No. MHK501050 that is just listed as a rear O2 sensor for 07 - 09, but it has a different plug again.

Have a look at your plugs, if they are all different then you may have the first 3 above, but if the 2 rears are the same you may have the last one.

 

On my truck. I have Two pair set of 02 sensors. The upstream pair are the same. The downstream pair are same.

 

Yes, there is only one part No. listed for the front ones MHK500840 so should be no problems there. The rear or down stream ones have 2 options and visually, apart from the plugs, they all look the same.

Can you get a photo of the plugs on the car, might aid identification? This link, I found, shows all three sensors for the rear, with good photos of the 3 plugs and which is which part No.

Land Range Rover Sport LR3 Genuine OEM Oxygen Sensor MHK500840 MHK500960 MHK500910 MHK501050

 

Wonder what the correct Denso numbers are then... dang, sitting in the garage waiting to install... According to the Denso web site for a 05 LR3 4.4 these are the correct numbers; http://densoautoparts.com/find-my-pa...icle-selection

2 of Denso 234-9075 Oxygen Sensor (Air and Fuel Ratio Sensor) upstream
Denso 234-4265 Oxygen Sensor (Air and Fuel Ratio Sensor) Downstream right
Denso 234-4266 Oxygen Sensor (Air and Fuel Ratio Sensor) Downstream left

 

Have a look at this one MHK501050 | Sensor Assy - Lambda is the plug the one you need for yours? Unfortunately the Denso part No. is not given.

 

I thought you said yours was an 07 LR3, in which case you should be ordering MHK501050 for 07-09 LR3s.

Check out this link, MHK501050 | Sensor Assy - Lambda is this the one you need, look at the plug?