I haven't messed with this pump but it only has an inlet, an outlet and an electrical connector. Replacing it will be a very straight forward task.

You will likely need to drain the coolant before removing the pump, then refill and bleed the coolant system when done.

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)