Will either one of these void my warranty -

Replacing the BMW "lifetime" transmission oil with Redline MTL

Replacing the coolant with non-BMW/MINI coolant

 

Thers nothing special about Mini coolant.See my gallery for pics on how to.As long as you use green type its not detectable.If you want to use other oil between factory changes its not detectable either just dont do reset or tell them you did.

 

Lifetime transmission oil (LOL)... If you belive that one, I've got some ocean front property in arizona. (I love that song)

You only viod a waranty if you screw something up. Replacing a fluid on your vehicle will not viod a waranty. Fluids are meant to be replaced. As long as you put the appropriate type of fluid in the appropriate place... Its all good.

 

As long as it meets the spec outlined in the Owner's Manual
you should be fine. The only sure way to know, though, is to
ask your specific dealer. Sad, but true.