Just purchased front O2 sensors for a 2000 DII with 110K on it. I have heard nightmares from some and "it's easy" from others. What are some of the ins and out of successfully removing and installing front O2 sensors.

Bill

 

hahaha.... make sure you push both of the "buttons" on the connector. I thought there was only one, but there is one on both ends of the connector. Should not be hard at all.

when i say buttons its like any electrical connection that has the safety connection that needs to be depressed before it will let go. best of luck,

Scott

 

At your mileage, if you want to benefit from new 02 sensors, you need to replace all 4.
Mike

 

There's actually O2 sensor sockets for easy removal. If you don't use one of tose, you'll need a wrench and torch. So, it's super easy if you torch it first and you have an O2 sensor socket, it's fairly easy if you torch it first and use a wrench, about the same with the socket and no torch, but try and take them out without a torch and only a wrench is basically impossible[:@]you might get lucky and get one out, but all four.....no way!

 

Lift the car high enough to be able to get to the connectors (front sensors), as they are the hardest to access. As Disco Mike says, only changing of all 4 sensors will provide you with the best results.

 

Thanks for all the tip guys...will give it a go on Friday.

Bill

 

bgalway
Changed all 4 of the O2 sensor on my 2000 LR. The hardest was the left precatalyst. Also make sure that the connections are good and you hear them "click". It took me about 45 min to an hour for all four.
Ed

 

If you're in a place that puts salt on the roads the torch might be the only thing that will work. But I've had good results with "PB blaster" on my exhaust system bolts on Texas cars, let it soak for an hour or two. I've not tried it on O2 sensors yet, I'll be doing mine in the next few months.

 

I've never had too much trouble with the sensor itself (I <3 Blaster), but the damn electrical connectors on these things are in the worst places.

 

I hate to admit this, but I just gave up on the connectors and snipped the wires and put the new ones in using crimp connectors. I couldn't figure out the trick with the connectors and with a couple of them it's impossible to get two hands back there much less actually see the buggers.