At approximately 44k miles my water pump failed on my 2012 K1600GTL.
At the cost of approx. $300 I purchased a new pump (BMW part number 11518544999). The new pump came with new o-rings.
Markings on the rear of the pumps (see photos), indicate a newer design:
New:16163/02, built in 2015
Old:15548/02, built in 2010
The casting on the rear of the new pump is also different, denoting a new and improved design.
I purchased the BMW coolant from Autozone in a NON-mixed concentrate (Pentofrost NF Coolant/Antifreeze (1.5 Liters) - Pentosin). Azone is phasing the non-mixed fluid out and going to only carry the pre-mixed coolant in the future.
At the cost of approx. $300 I purchased a new pump (BMW part number 11518544999). The new pump came with new o-rings.
Markings on the rear of the pumps (see photos), indicate a newer design:
New:16163/02, built in 2015
Old:15548/02, built in 2010
The casting on the rear of the new pump is also different, denoting a new and improved design.
I purchased the BMW coolant from Autozone in a NON-mixed concentrate (Pentofrost NF Coolant/Antifreeze (1.5 Liters) - Pentosin). Azone is phasing the non-mixed fluid out and going to only carry the pre-mixed coolant in the future.