When replacing your water pump, what happens in your cooling system is that the burden of wear transfers to a different part, one that will then need to be replaced itself at a later point.
By attending to the water pump and thermostat at the same time, the cooling system remains a self-contained, high-functioning unit.
ECS assembled and genuine BMW Water Pump and Thermostat Kits are now available for your E70 X5. Both include a replacement water pump, thermostat, a gallon of coolant, and all required replacement hardware.
Click HERE for your E70 X5 Water Pump & Thermostat Kit