post #1 of Old 03-23-2011, 08:10 PM Thread Starter
neon22
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2004 TJ Sport Oxygen Sensor?

Does anyone know what the oxygen sensor numbers are to replace all four? I know their is two up stream and two down stream. I recently went to O'Reilly and was given a paper of the following: Bosch 15504 $24.99, Bosch 15505 $39.99, Bosch 13687 $72.99, Bosch 15506 $29.99. Do I need one of each or are some better than others. Money is tight and would like to purchasing the least expensive product(s).

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post #2 of Old 03-23-2011, 08:10 PM Thread Starter
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engine is 4.0l
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post #3 of Old 03-23-2011, 08:48 PM
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How many miles on your 04?Is it running poorly?Why do you want to replace all 4?Are you getting any DTCs?
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post #4 of Old 03-23-2011, 10:20 PM
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I agree what is causing you to want to replace all 4? Are you getting any codes, the 2nd set of O2 sensors will usually through a code, the first set of O2 sensors sometimes won't, but if you aren't getting a code and think you need to change them I would just do one at time replacing the ones in front of the cats first. But give us your symptoms that make you think they are the O2 sensors.

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post #5 of Old 03-23-2011, 10:50 PM Thread Starter
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Currently I have approximately 129,000 miles, and my gas mileage has decreased to around 10mpg even thou I shift at 1250rpm. I dont know the reason but mpg dramatically increased when I cleaned the throttle body and is now around 15mpg. Occuasionly the check engine light will come on, and I receive the codes P0159 P0153. I dont know if it is normal or not but, it at rpms above 2500 the engine sounds rough. For whatever reason, when it rains the engine smooths out. A buddy has a 97 TJ Sport and he says his does the same. Is this normal? If not I was thinking it might be the belt.
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post #6 of Old 03-23-2011, 11:03 PM
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Originally Posted by neon22 View Post
Currently I have approximately 129,000 miles, and my gas mileage has decreased to around 10mpg even thou I shift at 1250rpm. I dont know the reason but mpg dramatically increased when I cleaned the throttle body and is now around 15mpg. Occuasionly the check engine light will come on, and I receive the codes P0159 P0153. I dont know if it is normal or not but, it at rpms above 2500 the engine sounds rough. For whatever reason, when it rains the engine smooths out. A buddy has a 97 TJ Sport and he says his does the same. Is this normal? If not I was thinking it might be the belt.
Still doesn't explain why you want to replace all your sensors...

If you have an intermittent CEL, then you might just have a wire or connection that's faulty. If you do replace your sensors, then use Mopar units...no Bosch!

If it's worth doing, then it's worth overdoing.

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post #7 of Old 03-23-2011, 11:25 PM
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You're getting **** mileage because you're shifting at 1250 rpm.

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post #8 of Old 03-23-2011, 11:27 PM Thread Starter
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Quote:
Originally Posted by neon22 View Post
I dont know if it is normal or not but, it at rpms above 2500 the engine sounds rough. For whatever reason, when it rains the engine smooths out. A buddy has a 97 TJ Sport and he says his does the same. Is this normal? If not I was thinking it might be the belt.
Sorry I got a little off topic here.
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post #9 of Old 03-24-2011, 02:59 AM
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Originally Posted by Sundowner View Post
Still doesn't explain why you want to replace all your sensors...

If you have an intermittent CEL, then you might just have a wire or connection that's faulty. If you do replace your sensors, then use Mopar units...no Bosch!
Pretty sure the Mopar ones are NGK.

www.rockauto.com is where I buy mine.
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post #10 of Old 03-24-2011, 04:19 AM
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Don't do the Bosch. Bosch have worked fine for me on other vehicles but on the Jeep, I replaced all of mine and the up stream ones both triggered heater codes in the winter (they are fine in warmer weather). Reading other posts, other people have had the same with Bosch and the Jeep.
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post #11 of Old 03-24-2011, 09:53 PM Thread Starter
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Alright, but my main question is what fuel injectors do I need. eg number(s) ?
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post #12 of Old 03-25-2011, 12:57 AM
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Quote:
Originally Posted by neon22
Alright, but my main question is what fuel injectors do I need. eg number(s) ?
Fuel injectors?

I buy my Mopars o2 sensors at www.moparpartsamerica.com. The descriptions will tell you upstream or downstream. If not, it will say sensor 1 or 2. Sensor 1 in each bank is before the cat.

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post #13 of Old 03-25-2011, 11:06 AM
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Fuel injectors? Where'd that come from?

Oh, and I'm seconding the comment about lousy mileage because of your low shift point. You need to shift about 2,000 HIGHER than that. Otherwise, you're just throwing retarded amounts of fuel into an engine that's being driven in too high of a gear.

Notice that I said "higher"...as in, try shifting around 3,000 or 3,200.

Your stumble at 2,500 is another matter, and no...the Jeep suddenly running fine when it rains is NOT normal.

If it's worth doing, then it's worth overdoing.

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post #14 of Old 03-25-2011, 11:14 AM
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Quote:
Originally Posted by Neil F. View Post
Don't do the Bosch. Bosch have worked fine for me on other vehicles but on the Jeep, I replaced all of mine and the up stream ones both triggered heater codes in the winter (they are fine in warmer weather). Reading other posts, other people have had the same with Bosch and the Jeep.
x2 against Bosch. A friend of mine is a dealer service manager and has seen Bosch O2 sensors go out within months of replacement on Jeeps. I just had him pick me up 2 OEM O2 sensors for my 02 TJ. He said the same as someone else here did: Replace the upper (before the cat) sensors first and it should definitely help.

Edit: Call the dealership and give them your VIN and they can tell you exactly which part numbers to order (whether you get it through them or somewhere else).

Last edited by bthompson; 03-25-2011 at 11:16 AM. Reason: gave more info.
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post #15 of Old 03-28-2011, 10:37 PM Thread Starter
neon22
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Sorry oxygen sensors
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