Coolant Pump Auxiliary Heating. Porsche 955 Cayenne 4.5L / 957 Cayenne 4.8L  ❭  95557215008

Coolant Pump Auxiliary Heating.

The BOSCH Coolant Pump Auxiliary Heating is a premium OEM-quality auxiliary coolant pump manufactured by Bosch, designed to circulate coolant through the vehicle’s auxiliary heating and thermal management systems. Unlike the primary engine water pump, this electric auxiliary pump continues to move coolant independently of engine speed, helping to maintain consistent cabin heating performance and efficient coolant circulation during specific operating conditions.

Fits:

• Porsche 955 Cayenne S 4.5L V8 2003-06
• Porsche 955 Cayenne Turbo 4.5L 2003-06
• Porsche 955 Cayenne Turbo S 4.5L 2006>>
• Porsche 957 Cayenne S / GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10

Diagram Ref No 19

This pump plays an important role in vehicles equipped with auxiliary heating, heater booster systems, or advanced thermal management systems. Manufactured to Bosch’s exacting OEM standards, it provides reliable coolant flow, efficient operation, and long-term durability in demanding automotive environments.

What This Product Does:

• Circulates coolant through the auxiliary heating system
• Supports efficient cabin heating performance
• Maintains coolant flow independently of engine speed
• Assists the vehicle’s thermal management system
• Improves heat distribution during cold weather operation
• Helps maintain consistent coolant circulation when required by the ECU

Symptoms Of Wear Or Failure:

• Reduced or inconsistent cabin heating performance
• Slow heater warm-up times Insufficient heat output at idle speeds
• Coolant circulation faults or warning messages
• Whining, buzzing, or abnormal pump noises
• Coolant leaks around the pump housing
• Auxiliary heating system malfunction
• Fault codes relating to coolant circulation or auxiliary pump operation

Why Replacement Matters:

• Restores proper coolant circulation through the heating system
• Improves cabin heating performance and comfort
• Supports efficient operation of the vehicle's thermal management system
• Helps maintain consistent coolant flow under varying operating conditions
• Reduces the risk of heating system faults and warning messages
• Prevents excessive strain on related cooling and heating components
• Ensures reliable operation during cold weather conditions
• Maintains OEM-level performance, reliability, and efficiency

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95557215008

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