[Kgolf31]

Posting this on behalf of my dad.

Received low coolant warning on his 2015 M235i. Got some coolant and proceeded to fill.

Bottle reservoir was basically dry, ton of air in the system.

Followed bleed procedures to get the air out of the system, ended up throwing in 2.5 Liters of 50/50 mix.

Car has 5,000 miles on it.

Not seeing anything underneath the car while parked, can't identify any source of leaks. Where in the world is this coolant going?


Going to call SA tomorrow and get the car in service, didn't know if anyone else experienced this type of issue. Going to closely monitor tomorrow and see if I see any change in level.

[Kgolf31]

Well, no surprise, coolant this morning everywhere.

[overcoil]

Be sure to post where the leak came from.

[Kgolf31]

Originally Posted by ScottSinger

Be sure to post where the leak came from.

Yep. I'll keep you all updated.

Source of leak is near the air dam driver side.

[overcoil]

Source is probably overflow tank or electric water pump maybe clamp and the coolant drains off underbelly at lowest point

[matthibodeau]

ahh reminds me of my old E46, most likely your expansion tank on the right side of your radiator

[Kgolf31]

Appears a piece of material (rock, ice, something) was able to somehow make it through the opening of the air guides puncture the heat exchanger.



I guess this is a PSA to put screens or something over those air guides.



This isn't covered by BMW either.

[alz0rz]

Wow! That is disappointing. Depending on how much the repair cost is vs. your insurance deductible, could you involve insurance?

[Kgolf31]

Originally Posted by alz0rz

Wow! That is disappointing. Depending on how much the repair cost is vs. your insurance deductible, could you involve insurance?

Sorry, I have an updated diagnosis.

A rock or something hit the oil cooler and caused a leak. It hit the metal fin, dented it, and sprung the leak.

Didn't damage the air dam front grill or anything, so it was something very small, which is kind of concerning if something like that can cause damage.

Cost is $791 to repair, involving insurance to reduce price w/our deductible.

[overcoil]

I wouldn't go through insurance, thinking insurance is going to recoup their payout / rather have a no claim discount.

[horsepower_and_hounds]

Can you shoot a couple of pic's showing where the damage accured and how/where the debris got thru?

[dharo1]

Originally Posted by ehagerty

Can you shoot a couple of pic's showing where the damage accured and how/where the debris got thru?

+1

[n_ac]

The same issue just happened to our car. What was the outcome of your situation?

[Kgolf31]

Originally Posted by n_ac

The same issue just happened to our car. What was the outcome of your situation?

Local BMW dealership was willing to help work with us on the labor cost to replace the unit.

BMW Warranty denied the claim because it was caused by road debris.