Best Coolant Temperature Sensors of 2026

"I replaced the faulty sensor on my 2004 Silverado 2500HD and was impressed by how quick and simple the installation was. The new sensor came with thread sealant and a washer pre-installed, and my truck's temperature readings are now back to normal. I only lost a little coolant during the swap, and I'm very happy with the high quality of the AC Delco Gold part."

"I used this sensor on my 2005 GMC Sierra because the gauge was reading higher than it should when cold. After installing this affordable OEM part, the readings are accurate again. It was a very easy swap, and I barely lost any coolant since I had the new one ready to go. Definitely recommend for a quick fix."

"I put this on some freshly machined 317 heads, and it fit perfectly with no issues. I like that the thread sealant is already applied, making the install process hassle-free. I'm hoping it lasts as long as my last one, which went 300,000 miles."

"After swapping out this sensor on my 2018 Camaro, the problem with the fan running nonstop—even in cold weather—disappeared completely. Installation was quick, required very little coolant loss, and my car is back to normal. I highly recommend this part if you’re experiencing the same issue."

"I’m not much of a mechanic, but with some YouTube help, I managed to install this starter on my 2016 Yukon. It wasn’t the prettiest job, but my car now starts perfectly and has been trouble-free for weeks. Definitely saved some money and learned a thing or two!"

"Replacing this sensor resolved the issue of my truck’s fans staying on after shutdown. The part matched the original perfectly, and the fix was quick and simple after watching a video. It’s an easy DIY project that saved me a trip to the shop."

"I recently replaced the coolant temperature sensor in my 1991 Chevy 1500 Silverado 350 after experiencing hard starting, fast idling, and engine flooding. After installing this new sensor, my truck is now running like new and I expect much better gas mileage. Swapping out the old sensor was straightforward, though you should be careful with the connector if it's old and brittle. I highly recommend this fix if you're facing similar issues."

"My Crusader 454XLi TBI was plagued by high idle and rich running, even fouling spark plugs. I thought it was the idle air control, but the real culprit was the coolant temp sensor, which had started leaking coolant into the connector. Replacing it with this sensor solved all the problems and saved me from buying a much pricier OEM part."

"When my GMC 5.7L Vortec started showing inconsistent temperature readings and issues, I swapped out this sensor located at the radiator hose inlet. The install was quick and easy with a deep socket, and now my scanner shows a stable temp of 190–195°F. This sensor supplies data to the ECM and works just as accurately as the old one."

"I've had this sensor installed on my '88 GMC 4.3L S15 for seven years, and it’s been consistently accurate and reliable. I don’t have much more to add—it just works."

"I was impressed that the sensor arrived undamaged in excellent packaging. After installation, everything worked perfectly."

"The all-brass construction really sets this sensor apart. My previous one had a plastic connector that broke, but this is much sturdier. It fit my 1994 Chevy 6.5L diesel flawlessly, so I highly recommend it."

"I installed this sensor in my 2019 Cadillac XT5 3.6L. It works perfectly and I had no issues at all, though removal and installation weren’t easy—a 15mm claw open end wrench helped a lot."

"This is an original GM part, so naturally it fit my vehicle perfectly. No need for computer reprogramming or anything complicated."

"The PO128 code was gone instantly after I replaced the sensor. While installation was tough—I had to remove the thermostat and use some patience with tight spaces—the sensor itself performed exactly as needed."

"Buying this through Amazon saved me nearly $20, and after installing it, my truck fans finally shut off properly and the temperature gauge started working again!"

"This was the quick fix I needed for my cooling fans staying on after I turned off the ignition in my 2016 Chevy Suburban."

"While it fit and functioned as expected for my 2015 Suburban, the part failed after just 6 months. I ended up switching to an AC Delco replacement and everything’s working now. I’m a bit wary about the authenticity given the low price and short life."

"I replaced my old sensor with this one, and it fit my truck perfectly. The temperature gauge is now reading accurately, and the installation was quick and simple. So far, it's working great and solved my previous issues."

"I was frustrated by all the conflicting advice online, but after installing this switch on my 2005 CRV, my fan started activating at a lower temperature, which I prefer. It's not 100% consistent, but it's still within the range I want. The price was reasonable compared to OEM."

"Got this for my GMC Sierra 1500 and it was a perfect fit. The part was $80 cheaper than OEM, making it an excellent value. No issues so far."

"I appreciated the perfect OEM fit—my old part was corroded and caused my fans to malfunction, which led to my 2012 Camry overheating. After replacing it, along with some other precautionary maintenance, my cooling system works great. Always check this part first."

"As a mechanic, I find these products are consistently close to OEM quality. I trust A1 products and recommend them for reliable repairs."

"It's been a few months since I installed it, and so far, it's been working well and definitely worth the price."

"I found it easy to install, and it’s exactly what I needed for my 2016 Dodge Challenger. The price is great and it does the job well."

"It worked on my 2006 Ram 5.7 Hemi with no issues. I’m still waiting to see how long it lasts, but so far, it’s working fine."

"I was impressed with the quick shipping and great value of this item. It worked exactly as described and solved my problem without any hassle."

"For just a few bucks, this part fixed my issue on a 2015 Suburban. I was initially concerned about the size, but it turned out to be just right."

"The connector fit my 1989 GMC S15, but the threads were noticeably smaller than the original. Keep in mind, not a perfect match for every vehicle."