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Old 05-16-2013, 12:19 PM   #1
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Question O2 Sensors

That darn orange "Check engine" light came on again the other day so I ran the codes and I need new O2 sensors front and back. I have a 1998 TJ, does anyone know where I can order them cheap? Looked on rock auto and they are running $32 each.

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Old 05-16-2013, 12:36 PM   #2
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Rockauto has about the cheapest prices. Google is you friend if you want to search. Just tpe in the part number

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Old 05-16-2013, 12:52 PM   #3
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advance should be about the same, and you can usually get 15% off on-line orders (even picking up in store) and sometime a $25 coupon toward future orders when you spend over a certain amount.
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Old 05-16-2013, 01:00 PM   #4
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Rockauto has about the cheapest prices. Google is you friend if you want to search. Just tpe in the part number
X2 I picked up all 4 needed for my jeep on rockauto.com. NTK's are what I went with. Just a maintenance matter for me.
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Old 06-11-2013, 05:28 PM   #5
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Who can recommend the best O2 sensor for a 2000 2.5l TJ. Ive bought a bosch Bank One Sensor One due to the Life time replacement and I've gone through three of em within the past couple of months...
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Old 06-11-2013, 06:11 PM   #6
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Who can recommend the best O2 sensor for a 2000 2.5l TJ. Ive bought a bosch Bank One Sensor One due to the Life time replacement and I've gone through three of em within the past couple of months...
NTK or NGK IMHO are worth it. Goto rockauto.com and punch in your engine/make/ect and you won't find a better price for them. And if memory serves me right, you only need a front and back since being a 2.5L If it was me, I get both instead of just the one you need and keep things even for brand.
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Old 06-11-2013, 06:14 PM   #7
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NTK or NGK IMHO are worth it. Goto rockauto.com and punch in your engine/make/ect and you won't find a better price for them. And if memory serves me right, you only need a front and back since being a 2.5L If it was me, I get both instead of just the one you need and keep things even for brand.
Okay cool deal. Thanks.
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Old 06-11-2013, 06:22 PM   #8
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Okay cool deal. Thanks.
Here's the discount code of 5% and where to put it:

1509819412371497

Using Your Discount Code

Enter the code above in the "How did you hear about us" line of the shopping cart. If you are using our traditional HTML catalog, please click the "Apply" button to the right of the field. And its good till July 21st 2013.
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Old 06-11-2013, 07:50 PM   #9
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Who can recommend the best O2 sensor for a 2000 2.5l TJ. Ive bought a bosch Bank One Sensor One due to the Life time replacement and I've gone through three of em within the past couple of months...
Going through 3 sensors in a couple months seems strange to me. I'm not saying your wrong, but I wouldn't believe I could receive 3 bad (defective) anything in a row from the parts house. Something making them fail? I'm guessing your testing them?
Let us know if changing brands cures your problem.
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Old 06-11-2013, 07:56 PM   #10
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Going through 3 sensors in a couple months seems strange to me. I'm not saying your wrong, but I wouldn't believe I could receive 3 bad (defective) anything in a row from the parts house. Something making them fail? I'm guessing your testing them?
Let us know if changing brands cures your problem.
Yeah Ive received three bad Bosch O2 sensors.
Thinking Bosch does not mix well with TJs.
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Old 06-11-2013, 09:23 PM   #11
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I've heard similar stories on bad Bosch o2 sensors, there garbage.
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Old 06-28-2013, 11:05 AM   #12
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I just ordered some O2 sensors from Rockauto, thanks RevCo666 for the discount code, I saved a few dollars!!
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Old 06-28-2013, 11:25 AM   #13
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Yeah Ive received three bad Bosch O2 sensors.
Thinking Bosch does not mix well with TJs.
The sensors were probably not "bad" they just dont perform well in our TJ's
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Old 06-28-2013, 11:53 AM   #14
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The sensors were probably not "bad" they just dont perform well in our TJ's
I had the same problems and running into the same issues with my 1998 TJ. My friend has been a technician with Jeep for over 12 years and he told me that the aftermarket sensors aren't bad they're just too sensitive or you need to rewire them to work with Mopar motors...

After getting one Mopar up stream o2 sensor and Clearing the codes everything just started working again, never had another issue .
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Old 06-28-2013, 11:55 AM   #15
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There is something mysterious about Bosch's 02 sensors and their Plus+2 and Plus+4 plugs that causes hard-to-diagnose problems when installed into a Jeep engine. For 02 sensors, I'd run either Mopar OE or NTK you can get from RockAuto Parts Catalog

Be wary that some 02 sensors are "generic" and either come with just wires you have to wire yourself into a connector, or they come with a connector that doesn't match the connector used in the TJ.
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Old 06-28-2013, 11:59 AM   #16
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There is something mysterious about Bosch's 02 sensors and their Plus+2 and Plus+4 plugs that causes hard-to-diagnose problems when installed into a Jeep engine. For 02 sensors, I'd run either Mopar OE or NTK you can get from RockAuto Parts Catalog

Be wary that some 02 sensors are "generic" and either come with just wires you have to wire yourself into a connector, or they come with a connector that doesn't match the connector used in the TJ.
Yeah I always make sure it's the bank 1 sensor 1 with the plug-n-play setup.
That's the sensor that I replaced with the Bosch one. This will be my 4th replacement, lifetime warranty. However, I'll get some NTK sensors shortly.
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Old 06-28-2013, 12:03 PM   #17
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I pay no attention to a part's "lifetime" warranty. Some of the shoddiest/cheapest parts I have ever seen from Autozone came with that lifetime warranty is definitely no indicator of quality, expected longevity, or reliability. It only means they'll give you a replacement when you bring it back after it failed. Mopar OE parts only have a one year warranty, no one of sound mind would doubt their quality is much better than any of Autozone's lifetime warranty parts.
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Old 06-28-2013, 12:31 PM   #18
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I just ordered some O2 sensors from Rockauto, thanks RevCo666 for the discount code, I saved a few dollars!!
Your welcome
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Old 06-28-2013, 12:38 PM   #19
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I pay no attention to a part's "lifetime" warranty. Some of the shoddiest/cheapest parts I have ever seen from Autozone came with that lifetime warranty is definitely no indicator of quality, expected longevity, or reliability. It only means they'll give you a replacement when you bring it back after it failed. Mopar OE parts only have a one year warranty, no one of sound mind would doubt their quality is much better than any of Autozone's lifetime warranty parts.
Agreed. The lifetime thing just sounded good at the time because I was being a cheap bastard. Glad that Rev directed me, earlier, to Rock Auto because chain stores here in NC charge 80 bucks for an NTK sensor.
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Old 06-28-2013, 12:42 PM   #20
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Agreed. The lifetime thing just sounded good at the time because I was being a cheap bastard. Glad that Rev directed me, earlier, to Rock Auto because chain stores here in NC charge 80 bucks for an NTK sensor.
Its even worse for prices (locally) for o2 sensors. Almost 100$ a pop and I needed 4 for my jeep :/ I think I saved about 150-200$ over all doing my shopping at rockauto for my o2's
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Old 06-28-2013, 01:34 PM   #21
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Its even worse for prices (locally) for o2 sensors. Almost 100$ a pop and I needed 4 for my jeep :/ I think I saved about 150-200$ over all doing my shopping at rockauto for my o2's
I have a 2.5. So i only have an up stream and a down stream.
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Old 06-28-2013, 01:36 PM   #22
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I have a 2.5. So i only have an up stream and a down stream.
Lucky then... There are some benefits to 2.5 I guess J/K
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Old 08-04-2013, 12:39 PM   #23
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Are the up stream and down stream the same o2 sensor?...I have a check engine light on to and threw both codes ....
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Old 08-04-2013, 12:41 PM   #24
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Are the up stream and down stream the same o2 sensor?...I have a check engine light on to and threw both codes ....
This is the TJ section, you won't get proper answers here unfortunately... Personally, I could only guess, and guessing doesn't give right answers for a JK.
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Old 08-04-2013, 01:10 PM   #25
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I have a tj 1999 4cly now too
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Old 08-04-2013, 01:17 PM   #26
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I have a tj 1999 4cly now too
Jeeze, according to your profile you have a JKU... Might want add that TJ to your list because when people don't give much info, rule of thumb is look at the profile. If you look at mine, its littered with info in the event I don't mention something specific.

For a 1999 2.5L, according to rockauto.com, you have 2 different part numbers for both (2) o2 sensors. So they aren't the same. Go NTK and not botch...

NTK Part # 23506 {#23103} NTK OE Type (upstream)


NTK Part # 23099 NTK OE Type (downstream)
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Old 08-04-2013, 03:59 PM   #27
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I just replaced the upstream and down on my 99 TJ. Bought Bosch from amazon, they were repackaged, $25 each 2 day prime shipping.

They were brand new w some tape on the box. So far so good. CEL light is gone, it's only been on for 6 months.
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Old 08-04-2013, 04:52 PM   #28
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I just replaced the upstream and down on my 99 TJ. Bought Bosch from amazon, they were repackaged, $25 each 2 day prime shipping.

They were brand new w some tape on the box. So far so good. CEL light is gone, it's only been on for 6 months.
Well, you might be part of that 1% crowd lol Try reading up on other o2 sensor threads on this site and you'll see what I mean. I stand by my word on that one! Everytime I hear someone put in bosch's in there jeeps, there always an issue. NTK is actually OE for jeep TJ's
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Old 08-04-2013, 05:44 PM   #29
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Jeeze, according to your profile you have a JKU... Might want add that TJ to your list because when people don't give much info, rule of thumb is look at the profile. If you look at mine, its littered with info in the event I don't mention something specific.

For a 1999 2.5L, according to rockauto.com, you have 2 different part numbers for both (2) o2 sensors. So they aren't the same. Go NTK and not botch...

NTK Part # 23506 {#23103} NTK OE Type (upstream)


NTK Part # 23099 NTK OE Type (downstream)

cool thanks for the info will order them tonight
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Old 08-04-2013, 05:53 PM   #30
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cool thanks for the info will order them tonight
Hold on, there is a post somewhere with a discount code. Mine expired mid july(as per one of my earlier posts above). I'll see if I can find it and PM it to ya unless you don't like saving money of course lol

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