Thermostat OEM BMW or Motorcraft

The Motorcraft thermostat sounds promising though, never have an issue with genuine ford parts.

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.

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.

Soon as i bought Motorcraft all was normal again

03’ E46 318ci with 130k miles and no issues with the whole cooling system. Neither the thermostat.

Make sure you use the motorcraft thermostat.

I replaced the thermostat from a non-OEM to Motorcraft about a month ago, and the only difference has been the speed at which the dial moves from higher temps to its normal positon.

I bought a Motorcraft thermostat from the Ford dealer for my Crown Vic and it ran about 20 degrees cold.

I’ve had a Motorcraft thermostat fail after 100mi on my Ford

I replaced the t-stat with a genuine part and again no luck.