I was experiencing an occasional "service engine soon" light on my dash. The dash light would come on and stay on for a few hundred miles to sometimes over 2000 miles. It eventually would go out only to return once more. The computer was registering a P0420 code which means that something is not right with the emissions system. After a lot of internet reading I decided to replace both the front and rear oxygen sensors. The front sensor - this one - was difficult to change out on my particular car - a 2000 Subaru Outback. Removal of the old part and installation of the new oxygen sensor was a bit difficult because of the various other components around the exhaust system. Being a contortionist would have helped. I have not seen the "service engine soon" light since both oxygen sensors were replaced. The Bosch replacement parts looked exactly the same as the original equipment that I removed from the exhaust system.
A word of caution. A P0420 code can also mean that the catalytic converter needs to be replaced. I took a chance and replaced both oxygen sensors since the car had over 125,000 miles on it at that point and the service interval for oxygen sensors is around 100,000 miles. A good catalytic converter would have cost over $500 for the part alone and the oxygen sensors would have needed to be replaced anyway. So for the $120 I did the oxygen sensors only. It turned out that was all I needed.
My Subaru 2002 Outback went from high altitude to sea level and the engine started stalling in traffic, began running rough with intermittent racing. It had done this years ago. Back then I paid hundreds of dollars just to have the O2 sensors replaced. This time I figured I could replace the sensors myself. I looked at several web site vendors and then turned to Amazon. I was surprised that I found the part for my 2002 Subaru Outback. Amazon even verified that the part was correct for my make and model ("This fits your: 2002 Subaru Outback, 2.5L H4....). I went to Y__T____ and found a video that showed exactly how to replace the part. I also went to the free manuals on Autoz***.*om to determine the exact location on my model car. I did not need to remove the exhaust pipes from the exhaust manifolds so I bought the Powerbuilt 648691 Oxygen Sensor Offset Puller. I had to put a pipe extension on the rachet, and carefully applied pressure to get the sensor removed, but it worked like a charm. I bought both the front and rear sensors, and replaced both at the same time. The plugins were an exact match. The whole job took about 2 hours, not bad for a novice.
I saved a considerable amount of money buying sensors off amazon and installing them myself versus going into any shop. There is also a feature that pops up when buying auto parts to insure that the part will fit your car, use it! I used this part for my 2002 subaru legacy gt wagon with 130k miles. It took a little longer than I anticiapted to replace because I was trying to change while the system was still hot but worked perfectly once in. If your car is throwing a CAT code try changing upper/lower sensors first before replacing the whole system since you will be changing sensors regardless! Code is gone, better gas mileage, fairly cheap to do myself.
the oxygen sensor is important to make it run it's best and get good mileage
My cherokee has 345,000 miles and ran pretty good but not perfect
I replaced the old oxy sensor & now it runs much better and getts better mileage.
Bosche is a quality part with a good reputation. There are cheaper ones and even "universal fit" sensors that you have to do some wiring to use them.
\ Ths fit perfectly and worked great.
My 02 Subaru outback started hesitating, lurching, idling rough - almost undrivable. I was pulling the P0172 code, but after some research decided it was most likely the front 02 sensor and not the airflow sensor. I had recently taken a road trip from mile high to sea level and back and I had read that this is a common cause for fowling these sensors.
Anyways dealership would have charged ~$400.00 for the replacing it, Autozone wanted ~$100.00 for the part. After reading reviews I decided to order here on Amazon and install myself.
It was a challenge to take the old one off and I end up having to drop the exhaust to get access. Also had to buy a crowfoot extension. Took about 1 hour to do myself - once I realized that I just needed to drop the exhaust down.
Car back to running great, check engine light went off for first time in about 50k miles, and I saved a few hundred bucks. Thank you!
Feature Product
- Offset oxygen sensor socket provides extra leverage for easier removal even in hard to reach spots
- Slotted design allows removing oxygen sensor with wiring harness attached
Description
Bosch ceramic technology affords best-in-class performance. Driven by the need to meet U.S. EPA requirements for lower exhaust emissions, Bosch developed the revolutionary planar sensor. The planar sensor "lights off," or reaches operating temperature, in approximately 10 to 12 seconds. That's over two times faster than a conventional thimble type sensor. This quicker light-off time reduces emissions by over 50% during the cold start phase, when harmful emissions are highs. To date, Bosch has produced 1 billion Oxygen Sensors. It took 32 years – from 1976 to 2008 – to reach the production record of 500 million pieces, but only eight years – from 2008 to 2016 – to double the production figures to 1 billion sensors. Bosch Oxygen Sensors continue to lead the market with their high-quality reputation; an attribute that has defined Bosch since its inception.
My wife's OBW 2002 2.5L - developed the jitters, stalls, jerkings and all the annoyances. After replacing fuel pump, fuel filter, sparks, air filter (this was needed anyway), IAVC ($35 off of ebay) and still had problems, it was time for the next candidate and here it is - the car is purring again after I replaced the upstream/front O2 (lambda) sensor.
No special wrench is needed for this car year, but it really helps to remove the front right wheel - yes, you can use a boxed wrench.
We are happy again.
I installed this Bosch Front Oxygen sensor in my Subaru Forester 2001 4 cyl. It fits fine with no issues, it's a direct replacement, if you look at my photos you can see it looks exactly like the one I removed form the car. The car now runs great. This is a very reasonably priced replacement. Shipping was quick too which was a plus.
I have a 2001 Subaru Forester. The "check engine" light came on at 98,000 miles. So I connected an Actron AutoScanner CP9575 diagnostics instrument to the OBD port. It said that the front oxygen sensor was bad. I verified the part number that was required and shopped around for the best price and ordered from Amazon. While waiting for the part to arrive, I sprayed WD-40 oil on the bad part to make it easier to remove. When the new part arrived (Bosch 17018) I drove the front wheels on a ramp which raised the car 6 inches, then disconnected the battery for safety. I connected the "Powerbuilt 648691 Oxygen Sensor Offset Puller" to my ratchet and tried to remove the old part. It would not budge, so I slid a 15-inch length of steel pipe over the ratchet tool to assist. It worked this time. The new part was exactly the same as the old part, connector and everything. If you are comfortable changing your own spark plugs then this job won't be too difficult. The "check engine" light is now off. Success.
Using prime it takes maybe a day longer to get this than it would from Advance or Napa, but the price is low enough to make an extra day worth the wait.
Changing this on an '02 impreza was not an easy job, and I wouldn't have been able to do it without an oxygen sensor specific socket (has a slit in it to go over the wires and then the location where it attaches to the ratchet is offset from the center). Obviously the job difficulty doesn't have anything to do with the product itself, but I just thought I'd mention it.
Fit perfectly when I installed it and has the correct clip that connects quickly and easily to the factory clip.
Performs exactly as expected on my 2001 Forester, fixed the check engine light I had for lagging oxygen sensor response. Fit perfectly with the existing wiring harness and in the old sensor socket. A couple of unexpected nice extras - it came with anti-seize already coating the threads, and a small protective plastic cap for the delicate sensor head.
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