Rover Resources Center
Oxygen Sensor Replacement On A Defender 90, Range Rover Or Discovery I
Watch Doug, our Land Rover Master Technician, go over the steps involved in performing the oxygen sensor (or O2 sensor) service on a 1997 Defender 90. Using our
money-saving kit # AMR6244SKA, with all the parts you need to do this service, it is recommended that the O2 sensors be replaced every 90,000 miles. Kit #: AMR6244SKA Replacing Oxygen Sensors On Defender 90 1997, 8-Cylinder Gasoline, North American SpecificationsHi I'm Doug, your tech support representative for Atlantic British and in this video we are going to touch base on the O 2 Sensor Replacement as part of your service and maintenance program. Now it's recommended on the high mileage vehicles, as actually in Land Rover's programs, your usually recommended at 90,000 miles. So if you have a high mileage Land Rover, the Defender 90, Discovery 1 and the P38 Range Rover will use this kit. It will give you all 4 sensors. Your 2 upstream and your 2 downstream, which actually are the same O 2 sensors. And what we're going to do later in this vehicle is we're going to give you basics and tips on how to replace those O twos. Now we're going to show you the location and give you a couple tips on changing the O 2 sensors in a 1997 D90. Since the advent of OBD 2, most of your vehicles 96 and up are going to have 4 O 2 sensors. You're going to have 2 upstream ahead of the catalytic converters. And 2 downstream, behind the catalytic converters. Now on the case on this one, these are all the same size. These are going to be a seventeen millimeter wrench you're going to use to take these off. And you'll see the locations on all 4. Access is pretty reasonable on these. The only thing you might find a little bit is on the routing for the wiring to get to your connectors you should be able to get to all 4 quite easily. But always check the routing of the wiring before you take it apart. Before you take it off. So that when you install it, you're going to put your wiring in the same place. Most notably, when you look at the rears, where they run the wiring through the transmission mount so they don't get hung up down below. You really want them up in a protected area, but yet not high enough to any of the supports or any moving linkage under there. Now, essentially, and we're going to show you on this O 2 sensor right here which is the downstream on the number 2 bank or passenger side of the vehicle. They've been in there for a while. And you usually find a flare wrench is usually the best application to atleast crack it loose. It has a better fit on the O 2 sensor itself. It will cause less distortion. That's why they use these on brake lines as well. You're just going to slide that over. And it's angled, so it will actually give you some access to the other end. And you just take a medium sized ball peen hammer. And you can usually tap it loose. Some of these it will be. It is loose but not quite loose enough to turn with the fingers. So you can just grab a regular open end wrench. Spin it off rest of the way. Trace your wiring to the connector, which in this case is just up and over the transfer case but still relatively easy to get at. Just right up in here where my finger is. And the other side will be the same. When you do the fronts, probably your best bet is to remove the O 2 sensor and then lower the vehicle, or if you're on a creeper go back up top. Your connectors are actually fairly easy to get at. Behind each cylinder head up top. And we're going to tighten this back up. You don't need to tighten it with a hammer like you did to take it off. You'll feel it seat just like a spark plug. Give it a little push. Eighth of a turn. Now she's seated in. Again you don't want to over torque it and do any damage to the threads. That's pretty much your O 2 sensors. As we recommended early, it's recommended to change them every 90,000 miles. After a period of time they do get coated. They're not as efficient as they were when they were new. That affects your fuel mixture in your engine which again can affect performance and fuel economy. When you want to do your O 2 sensors and you're ready for the kit you can call any of our knowledgeable salesmen at 1-800-533-2210.
Applies To These Models:
Discovery I | '94-'99
Range Rover 4.0 (P38) | '95-'02
Range Rover 4.6 (P38) | '95-'02
Defender 90 | '94-'97
This video has been viewed: 1130 times
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