Best Oxygen Sensors of 2025

"I needed to replace a b2s1 sensor on my 04 Ford Ranger 4.0, and it worked perfectly with no hassle. It fixed my code and driving issues."

"I had some doubts about these aftermarket O2 sensors due to the price, but they passed smog emissions here in CA. So far, no codes and my 2000 F150 5.4 is running smooth."

"I experienced problems with uneven long-term fuel trim. It turned out that most of my O2 sensors were burnt out. I recommend sticking with OEM parts to avoid headaches."

"I received three that were the right ones but ended up with one that was incorrect. I had to rush to the parts store to find the last one so I could replace all of them."

"I have a 2013 with the Hemi, but the plugs don't match up with the old ones. They look very close, but they just won't align for some reason. I wasted my entire evening putting the old ones back on."

"These do not fit my 2019 Ram Rebel even though it claimed to. The plugs are square while my Rebel has flat plugs."

"I fixed the O2 sensor fault on my 2014 Equinox. Just make sure to get the socket tool for the upper sensor!"

"I found these sensors and the price was appealing, even after hearing that some customers had issues. I figured if it fixes the problem, even for a little while, it would indicate that it was indeed the issue. After installing sensor 1, the car ran horribly. I received engine codes for a bad sensor right out of the box. I replaced sensor 2, but for now, it seems to be running better."

"The product arrived on time and was just as described. The packaging was sealed, and everything fit my vehicle perfectly. So far, everything is functioning very well—I would totally recommend it!"

"I recently installed this oxygen sensor and it drastically improved my MPG while also making the check engine light go away. I found it easy to work with and felt confident in the Bosch brand quality."

"After replacing my downstream sensor, I noticed solid construction and great performance on my '04 Escalade. I've already ordered a second one for the other bank, as I believe these sensors will last a long time."

"I haven't installed the sensor yet, but I trust Bosch for durability. Unfortunately, the vehicle it was meant for had an accident, so it'll be a while before I can test it out."

"I had a code 1166 and bought a $50 sensor to save money, but it was a mistake. After installing it, I had multiple codes. I switched back to my old sensor, and the only code that showed up was 1166. I finally purchased the Denso sensor, which was pricier but worked perfectly and cleared all codes. The car runs great now. I regret trying to save money."

"I installed this sensor while swapping my K20 engine from an Acura RSX Type S. Despite its higher cost, the quality is evident. It reads accurately and has caused me no issues at all. It's definitely a genuine Denso product."

"When my Check Engine Light lit up, I used an OBD2 reader and found a P0135 code. I considered the dealership's $500 quote for replacing the sensor, but instead, I bought the Denso 234-9005 for a fraction of that cost. After some research and watching YouTube videos for guidance, I replaced the sensor myself and saved a lot of money. The new sensor worked perfectly, and my engine light turned off after a short drive. I couldn't be happier!"

"I truly appreciate the quality of these O2 sensors. They fit my application perfectly, making the installation process so much easier. The anti-seize on the threads was a thoughtful touch that saved me time. They perform just like my original sensor—if not even better! After six months of use, I’m relieved to say the engine light hasn't come on since installation."

"After installation, I started getting codes for P0430 and P0420. The O2 sensor voltage reads high for both banks. Also, the clip doesn’t lock in place for one of the downstream sensors. They look identical to the sensors I replaced."

"While replacing both exhaust manifolds on my 2013 Ford Explorer, I found these O2 sensors to be of fairly low quality. They didn’t quite look right, but they do the trick."

"These sensors were a perfect fit for my vehicle and they have worked great. I found them to be the cheapest option and thankfully, there were no issues at all!"

"I have a 2006 Ford Ranger 3 L. The O2 sensors fit fine, but unfortunately, they show faulty readings in the live data. I was hoping they would help me pass emissions, but because of the faulty readings, I ended up failing."

"I received the package on the stated delivery date. After having my mechanic install the sensors, we discovered that two of them were not working properly. I won't be ordering this brand again or recommending it to anyone."

"I found the 2006 Toyota Matrix sensor to be a perfect fit. It was easy to install, and the performance is great. Plus, it's significantly cheaper than other options, so I would highly recommend it."

"I had to take off a star because of the plastic cap issue with the electrical design plug for the downstream sensor. I ended up cutting the old cap and using electrical tape, but the sensors work perfectly."

"The bank2 O2 sensor didn’t fit properly because it couldn’t thread through the passenger floorboard due to the rubber grommet. It was disappointing that I couldn't use it."

"I installed this sensor on my 2003 Tundra for the upstream passenger side. Got a P0051 error code indicating a heater failure. Removing the O2 sensor was easier than expected; I pre-treated the threads with oil penetrant a few days prior. After some effort, the old sensor came out, and the new one fit perfectly. I used a code reader to clear the error, and I've driven for four days with the check engine light off!"

"After receiving a shocking quote of $315.99 CDN from a dealer for my 2002 Sequoia, I decided to look for alternatives. I found that these Denso O2 sensors are the OEM for Toyota, making them an obvious choice. For $120, I got both sensors, and the check engine light went out. My fuel economy improved significantly on my recent trip."

"I have a 2003 Tundra 4.7 and had changed the sensors twice before with recurring issues. Finally, I discovered that Denso makes the original sensors. After replacing all four, the check engine light hasn’t come back for two weeks, and my gas mileage is nearly 30% better!"