Removing the coolant line between the coolant pump and heat exchanger partially

Preliminary work 

• Refer to REMOVING THE TOP LEFT COVER IN THE ENGINE COMPARTMENT and REMOVING THE TOP RIGHT COVER IN THE ENGINE COMPARTMENT .
• Refer to REMOVING THE ACOUSTIC COVER .
• Refer to REMOVING UPPER CROSS CONNECTION .
• Refer to REMOVING THE FRONT-END STRUT .
• Refer to REMOVING THE REAR TOP CROSS CONNECTION .
• Refer to REMOVING THE INTAKE FILTER HOUSING ON THE LEFT .
• Refer to REMOVING THE LEFT UNFILTERED-AIR DUCT .
• Refer to REMOVING THE FAN COWL .
• Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
• Refer to REMOVING THE WHEEL ARCH COVER AT THE BOTTOM FRONT LEFT AND BOTTOM RIGHT .
• Refer to DRAINING THE COOLANT FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
• Refer to DRAINING THE HIGH-TEMPERATURE COOLANT CIRCUIT .
• Refer to REMOVING LEFT CHARGE AIR COOLER .
• Refer to REMOVING LEFT THROTTLE VALVE ASSEMBLY .

• Loosen screw (1).
• Release the wiring harness mounting (2).
• Remove the heater return (3) to the side in arrow direction from the coolant pump.

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Remove left throttle valve assembly 

• Loosen screws (1).

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• Remove the throttle body (1).

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• Unlock plug connection (1) and disconnect.
• Remove the sealing ring (2).

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• Unlock the coolant line on the retaining clip (1) and disconnect it.
• Guide out the coolant line.

Courtesy of BMW OF NORTH AMERICA, INC.