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Old 01-21-2013, 01:01 PM   #1 (permalink)
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Default O2 Sensor Questions

I have a 2000 Land Rover Discovery 2. Im replacing my O2 sensors, and I have a couple questions:

What kind of O2 sensor should I buy?

Also, can you clean the sensor yourself?

How do you remove the sensor from the exhaust?

Please answer, thanks!
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Old 01-22-2013, 06:00 AM   #2 (permalink)
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1. Bosch came as OEM equipment. It is recommended and it is what I used when replacing mine. Do not skimp on the sensors and do not use generic wire-them-yourself models. Make sure you get 4 (2 upstream, 2 downstream)

2. O2 sensors begin failing after burning oil and gasoline harden into carbon deposits on the sensing unit. Unfortunately, no solvent can remove carbon deposits as they are insoluble. The only way to clean them would be mechanical action (i.e. scrubbing), but the sensing unit is unreachable due to the steel cage surrounding it. Short story - no you cannot clean your O2 sensors.

3. You use a wrench to remove them from the exhaust. The down stream ones are very easy while the upstream ones are a bit more involved. Shouldn't take you more than 1.5 hours for all 4.
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Old 01-22-2013, 06:06 AM   #3 (permalink)
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1. The cheapest one you can find. Most are all made by 1 or 2 manufactures and reboxed. The last Bosch sensors I bought were reboxed NTK which are the largest mfg of them. When I removed my original ones they were stamped NTK.
Cheapest usually means NTK from Amazon.
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Old 01-22-2013, 03:43 PM   #4 (permalink)
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Thanks for the replys! It does help!
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Old 01-22-2013, 05:25 PM   #5 (permalink)
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Quote:
Originally Posted by antichrist View Post
1. The cheapest one you can find. Most are all made by 1 or 2 manufactures and reboxed. The last Bosch sensors I bought were reboxed NTK which are the largest mfg of them. When I removed my original ones they were stamped NTK.
Cheapest usually means NTK from Amazon.
There may be ones that are "too cheap" out there and I may have found them. . . When I did the Y-pipe on my 2000 Disco I bought 4 pre-wired O2 sensors on eBay for something like $90 shipped. Installed them and they all failed. Gave these codes: P0135, P0155, P0141, P0161, P0150, P0130. Took the old ones out of the old Y-pipe and put them in and the codes went away and everything has been good the last 1500 miles . Because the new sensors had been installed I couldn't get a refund, but they did exchange them with new ones, which are still in the box and I do not have plans on trying again unless I run into O2 sensor problems down the road. Just FYI.
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Old 01-22-2013, 05:49 PM   #6 (permalink)
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When you purchase the sensors, be sure to give them your VIN. They need it to make sure they are selling you the right ones. Ask me how I know. The sensors are actually pretty easy to remove if you buy the special wrench - think I paid less than $10 for it - actually I think it was just a socket. The hardest part for me was getting the doggone plastic male/female connectors apart.
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Old 01-22-2013, 06:17 PM   #7 (permalink)
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When you purchase the sensors, be sure to give them your VIN. They need it to make sure they are selling you the right ones. Ask me how I know. The sensors are actually pretty easy to remove if you buy the special wrench - think I paid less than $10 for it - actually I think it was just a socket. The hardest part for me was getting the doggone plastic male/female connectors apart.
HATE those damn connectors
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Old 01-22-2013, 06:22 PM   #8 (permalink)
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Yes, really bad design and then they make the wires so short that you cannot get to the connectors with both hands. If you could just pull them down and get two hands on them it would be a different matter. And who exactly designed the way they lock and unlock --terrible.
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Old 01-23-2013, 06:12 AM   #9 (permalink)
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Quote:
Originally Posted by stinkbutt View Post
There may be ones that are "too cheap" out there and I may have found them. . . When I did the Y-pipe on my 2000 Disco I bought 4 pre-wired O2 sensors on eBay for something like $90 shipped.
Yeah, I should have said, cheapest known brand you can find.
Like I use the cheapest copper core plugs I can find, but wouldn't buy a set of "Stan's Plugs".
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Old 01-23-2013, 02:59 PM   #10 (permalink)
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Default Re: O2 Sensor Questions

Thanks again! Id make sure I get the right ones. And yeah those plugs are a pain!

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Old 01-24-2013, 12:16 AM   #11 (permalink)
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Does anyone know if there is a YouTube Vid on changing these?

Would be useful
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