Removing and installing/replacing auxiliary water pump (B48 and B46 engine) (Cooper S and John Cooper Works)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2021 MINI Cooper, 2020 MINI Cooper, 2019 MINI Cooper, 2018 MINI Cooper, and 2017 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Preliminary work needed:

Drain COOLANT .

Removal:

Remove screw (1).

Pull the auxiliary coolant pump (2) slightly forwards.

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Unlock and disconnect the connector (1) of the auxiliary coolant pump.

G11645391

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock coolant hose (1) and detach auxiliary coolant pump.

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Courtesy of BMW OF NORTH AMERICA, INC.

Unlock coolant hose (1) and detach auxiliary coolant pump (2).

Remove auxiliary water pump (2).

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Installation:

Install auxiliary coolant pump (1).

Connect coolant hose (2) to auxiliary coolant pump (1).

NOTE: The coolant hose (2) must engage audibly.

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Connect coolant hose (1) to auxiliary coolant pump.

NOTE: The coolant hose (1) must audibly engage.

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Connect the connector (1).

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Fasten auxiliary coolant pump with screw (1).

Tightening torque 11 51 4AZ .

G11645390

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Top up COOLANT .
Check cooling system for tightness.