BOSCH 15703 Premium OE Fitment Oxygen Sensor - Compatible with Select 1993-03 Acura, Buick, Cadillac, Chevrolet, GMC, Honda, Isuzu, Oldsmobile, Pontiac

I purchased a Delphi FJ10565 CSEFI to MFI fuel injector conversion kit and a set of four Bosch 15703 Oxygen Sensors at Amazon for my 1996 S-10 Blazer. They had these products available and at very affordable prices. After replacing the fuel injectors and noticing a marked improvement, I then proceeded to replace the four oxygen sensors. I did not have any problems with the units near the catalytic converters as they were very accessible and they only required some penetrating oil and the special socket to remove and replace. Make sure you warm up your vehicle for a couple of minutes to facilitate the removal of the old O2 sensors. The units near the exhaust manifold are much more cramped to access, requiring 'crow-foot' removers to replace. The right bank sensor was difficult to remove but the left bank required me to take it to a muffler shop as it had nearly welded itself onto the exhaust tube. Thirty-five dollars later and a new tap/retread job, I had all new four O2 sensors on. The level of smoothness is highly noticeable. I thought that the fuel injector replacement had made a sizable difference, but when I added the replacement of the O2 sensors, the difference was remarkable. Without ignoring that my vehicle has now 178K miles, the level of smoothness and performance is outstanding. I will be checking the MPG as I was getting an average of 13 MPG; regardless, the Blazer is, once again, reliable to drive.

Excellent quality operates flawlessly, highly recommended.

If you own one of the many vehicles these 02 sensors were used on, this is the one to buy. Bosch invented the technology. There's a good chance the OEM sensor you're replacing is also a Bosch so save yourself the dealer markup and buy this one. Works great, fits like original.

I bought this sensor for a 95 Riviera 3800 Series II (Naturally Aspirated) that had a P0131 (low voltage) code. When I removed my original sensor and compared it to the Bosch I saw that the Bosch only has two small slits for the air to be measured compared to eight larger slots all around the tip of the original sensor. I figured since this was listed as an upstream oxygen sensor that it may still work, but instead it caused a P0134 (no activity code) while the PO131 code went away. This sensor does not show as being active because it is not reading the air correctly due to the lack of holes in tip. I put the original oxygen sensor back in and it returned to the P0131 code status and the PO134 disappeared. This is a downstream oxygen sensor, not upstream, at least for my vehicle.

They work .

Plug 'n Play ready on my 99 Isuzu Rodeo. I'm not certain if they work, but the Check Engine light on my car went off. Actually, I'm not really concerned about the environment, the ozone hole, global warming, polar bears, and every other worry of the leftist tree huggers. I just wanted the F(*&!#(*%G Check Engine light to go off. Anything that furthers that objective gets 5 stars from me. BTW, the old sensors are not easily removed from their comfortable sockets on the exhaust pipes. You're gonna need a big breaker bar, cause those suckers are in there. The new sensors come with anti-seize compound, so you're all set with that. Bottom line, these little gems will work their magic and get your car running great. They're half the price here compared to the local auto parts store.

How does one rate O2 sensors, I mean they either work or they don't right? Anywho these work they do all the magic chemistry stuff that California is so fond of. Literally plug and play, I don't know what else to say. I guess maybe have zipties on hand for excess cable length depending on what Chevy you're installing into.

Perfect fit..

Works on 97 c1500 5.0 No issues

installed in a 4.4ltr forklift worked great

Perfect fit

1/3 price from my local parts, Lordco in BC.

Better quality than the equivalent ac/Delco sensor offered on amazon because the ground tab can be easily broken off upon installation on the ac/delco version rendering it useless