Original Engine Management 9377 Coolant Temperature Sensor

My 03 Ranger was running a bit rough, stalling and sputtering at times. OBDII reader identified the original sensor being faulty (-40 C) after the engine was warm. Pulled the sensor and replaced with this new one and all is good now. I would highly recommend purchasing new retainer clips as the old one will be junk.

I bought this part when my check engine light came on. I purchased an OBD II scanner for my car and learned that the problem was with my thermostat coolant temperature. Now there was a possibility that it was the thermostat sensor going bad but that seemed unlikely since my car showed the coolant level as always running extremely cold - a sure sign that the thermostat is stuck open and putting too much coolant into your engine. While replacing the thermostat, I decided to take advantage of the chance to replace Fords' magical disappearing thermostat housings (they are known for "melting away" with cracks, leaks, etc.) I was glad I bought the upper and lower housings to replace since when I pulled my old housing out, there was lots of calcification and leaked coolant around the bottom part of the lower housing. Even though my coolant levels were fine, something was clearly NOT fine with the housing. Replacing the sensor gave me the added peace of mind that I had a new, accurate sensor in place that would likely perform better than the existing one did. It wasn't a very expensive part so I decided to go for it. My car was idling funny and my mileage was getting poor - also symptoms of the thermostat and not just the sensor.Take my advice: if you are replacing any part of the thermostat apparatus, replace as much as you can. It will be cheap insurance down the road and trust me, you don't want to do this repair several times for a different part each time. I replaced the upper and lower housing, the thermostat, the thermostat O-ring (which was not included with the thermostat), the thermostat housing gasket, and the thermostat sensor. Since I was there I also replaced the upper and lower radiator hoses and replaced those nasty old spring hose clamps with screw hose clamps to make any future repairs easier. You will have to put more coolant in the car when you are done so buy some of that as well. If you buy the kind you need to mix with water, mix it with distilled water to prevent calcification/mineral build-up. I used this part to repair a 2005 Ford Explorer XLS with a V6 4.0 Liter SOHC engine.

I was able to install this in place of the original that came with my 2006 mustang however, the O-ring that comes with this, is not the same as the original. The original O-ring fits flat against the base of the metal- this one fits around the metal, as seen in the picture. It may be due to slight differences in shape from the OEM, but I was not able to force this in using the O-ring that came with it. I tried VERY hard to do this and I don't see it being possible (attempted on a 2006 v6 mustang). In order to use this part, I had to remove the Gaskets/seals from the original part and use those with the new part (lucky they weren't too old or cracked, lubed with motor oil to restore them) . Seems to be working perfectly and no leaks.

As countless others have said, the o-ring provided might not fit your application. This was for a 2007 Ford Explorer 4.0L. The included o-ring was too big to fit the housing, even using a little silicone lubricant didn't help. Fortunately, I was replacing the housing at the same time (Dorman 902-860 Thermostat Housing Kit) and the kit includes a proper fitting o-ring. I would think that by now, Amazon (or whoever lists these) would sell these according to fit or include a smaller o-ring to save others the frustration.The o-ring issue aside, the sensor works as it should.

Replaced old Coolant Temperature Switch and reset the Check Engine Light P0125 in 2002 Focus 2.0 SOHC. Noticed Temperature Gauge needle moves normal (the old switch barely moves the temperature gauge needle). Only time will tell if this switch last. As mentioned by other reviews, the included "O" ring seal is way too big! End up reusing the old one. Otherwise, it won't fit into the Thermostat Housing.The mfr. should include a smaller diameter "O" ring seal.

My stat body took a dump and i went to local auto repair to get a price. I just about fell over when hearing the price. I got both stat body and new sensor and installed them myself. Little tricky and some issues with space but got it in with no problems. Save a bunch of money. The install is not for first timers. Need some prior experience but doable.

Bought with the Dorman 902.860. As others have said, the o-ring that comes with it is too big to let it fit into the new thermostat housing or old housing. Good news the Dorman housing comes with a replacement one. I'm not really sure if this is worth replacing or not as I don't know the realistic fail rate of these things. But figured for the cost, might as well do it while I'm in there and have it apart, and I'd recommend the next person to do the same.

Item exactly as described. Works great.