vs
Thermostat OEM Volkswagen or Motorcraft
Reviews
I used a motorcraft RT-1139 thermostat. Comes with a jiggle valve to help bleed air already installed and cost me 8 bucks. You won’t find any place that says they fit other than some forum posts but they do indeed work, I installed one on my MJ with the only issue being me not refilling the radiator after dumping all the coolant.
Pros: works well, jiggle valve, good value
Vehicle:
Jeep
Part number: RT-1139
I requested they use only Motorcraft thermostat, because I knew there was a part # update. Threw the updated Motorcraft one in and it solved the issue.
Pros: solved issue, updated part
Vehicle:
Ford
Soon as i bought Motorcraft all was normal again
Pros: all was normal
Vehicle:
Ford
I did the timing belt water pump thing on my MK4 last year, and shortly after the test drive with fresh genuine VW antifreeze and while patting myself on the back for a job well done it occurred to me that I hadn't changed the thermostat. Sure enough a month or so ago when the first of the really cold whether started around here the temp gauge would only get to about halfway to normal during a trip to town and back. I tried the ol' cardboard in the grill routine for a couple of days until I got a chance to change the thermostat and that brought things back to normal.
Pros: brought things back normal
Cons: temp gauge halfway
Vehicle:
Volkswagen
Make sure you use the motorcraft thermostat.
Pros: highly recommended
Go with the Motorcraft thermostat as it has a rubber seal on the outside edge.
Pros: has rubber seal
Parts 03F-010-501-B Sensor 04E-121-113-G
Vehicle:
Volkswagen Jetta
Part number: 04E-121-113-G
I have owned my B6 since new and had the thermostat replaced under Warranty around 36,000 miles, at that point the slow warm up was causing the MIL to illuminate with a error that basically said warm up outside specification.
Cons: slow warm up
Vehicle:
Volkswagen Passat B6
Mileage: 57936 km
After getting mine back together, and filling it back up with coolant, i found the new thermostat from the dealership was stuck wide open and the car wouldn’t get over 110*F.
Cons: stuck wide open, car wouldn't heat
Vehicle:
Volkswagen Passat
I’ve had a Motorcraft thermostat fail after 100mi on my Ford
Cons: failed quickly
Vehicle:
Ford
Mileage: 161 km
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