I have an undiagnosed coolant leak. I've replaced the thermostat housing and crossover pipe, but there's still a small leak. The drips underneath the car are coming center-to-slightly driver's side of the car about where the firewall is. Based on location, I'm not suspecting the water pump or aux water pump, and since I just changed the thermostat housing and crossover pipe, I'm thinking it might be a coolant hose that's the culprit. As I was researching the hoses to the heater core, ECS Tuning has two heater core outlet hoses, but I'm not sure what the difference is between the two (other than maybe one is for a manual transmission and the other is for an automatic). I have an automatic. Any ideas:
https://www.ecstuning.com/b-genuine-...t/64217609823/
https://www.ecstuning.com/b-genuine-...t/64217609822/

Thanks for your help!

 

The difference between those hoses is that one is for an automatic and the other is for a manual. (they are identified right under the part title) If you have an automatic, you get the automatic one.

 

If you're talking about this:



a) I don't have a Coupe. There's no hatchback option
b) That looks like a thumbs down to me, not to mention the color. For other items, it will give you a green thumbs up saying, "Does Fit" ala:


So please forgive my confusion...

 

It says right there “For vehicles with Automatic Transmission” That’s what I was talking about.

If really in doubt, check your part numbers here:
https://www.realoem.com/bmw/enUS/select

 

Coupe is the hatch back, their was no coupe' in 2010 2012+ Have Cooper Coupe as the R58, you will see it pop up in those years it was produced. Its the AIAA standard that creates that weird coupe thing for MINI from part suppliers.