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- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
Fits:
Porsche 981 Boxster 2012>>
Porsche 981C Cayman 2012>>
Porsche 991 2012>>
Diagram ref no 1
Related reference numbers
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99157392201
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- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Fits:
Porsche 95B Macan LHD cars only (not for Diesel engines)
Porsche 958 Cayenne (not for 3.0L petrol engines in China market)
Click 'Zoom in' for large parts diagram.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95857281000
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Fits:
Porsche 958 Cayenne 2011 - 2018
Fits to nr 10 on diagram.
Related reference numbers
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7P0820521A
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Auxiliary Coolant Pump for Heating System
The auxiliary coolant pump for the Porsche 955, 957 and 958
Cayenne is a secondary electric water pump designed to support coolant
circulation through the vehicle’s heating system. This pump ensures consistent
coolant flow to the heater matrix, improving cabin heating performance and
maintaining balanced engine temperature control. This is a key component of the cooling and climate system, particularly in colder conditions and during idle operation.
Fits:
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Diagram ref no 24
What the Auxiliary Coolant Pump Does
Unlike the main engine-driven water pump, the auxiliary
coolant pump operates electrically and assists with circulating coolant when
required. It is responsible for:
- Supplying hot coolant to the cabin heater core
- Supporting even heat distribution inside the vehicle
- Maintaining coolant flow at idle or low engine speeds
- Assisting with temperature regulation in complex cooling systems
- Improving warm-up efficiency
In Porsche Cayenne models equipped with advanced climate control systems, the auxiliary pump plays an important role in ensuring reliable heating performance.
Why Auxiliary Coolant Pumps Fail
Over time, the auxiliary coolant pump can fail due to:
- Electrical motor wear
- Internal bearing degradation
- Coolant contamination
- Heat cycling within the engine bay
- Age-related plastic housing fatigue
- Corrosion from coolant exposure
Because the pump operates electrically, failure may occur suddenly or gradually.
Common symptoms of a failing auxiliary coolant pump include:
- Weak or inconsistent cabin heating
- Heater blowing cold air at idle
- Coolant circulation fault codes
- Check engine or cooling system warning lights
- Unusual noise from the cooling system
- Coolant leaks around the pump housing
When You Should Replace the Auxiliary Coolant Pump
You should consider replacing the auxiliary coolant pump if:
- Cabin heating performance becomes inconsistent
- The vehicle struggles to maintain warm air at idle
- Diagnostic fault codes indicate coolant circulation issues
- The pump becomes noisy or stops functioning
- You are servicing other cooling system components
- The vehicle has high mileage and original cooling parts
Replacing the pump proactively helps maintain reliable heating performance and prevents strain on other cooling system components.
At Design911, we supply high-quality auxiliary coolant pumps engineered to meet OEM specifications. Designed for durability and reliable performance, this pump restores proper coolant circulation and heating efficiency.
Maintaining your Cayenne’s cooling and heating system is essential for both comfort and long-term engine reliability.
Key Benefits at a Glance
- Direct replacement auxiliary coolant pump
- Restores cabin heating efficiency
- Maintains proper coolant circulation
- Reduces risk of overheating or heater malfunction
- Suitable for Porsche 955, 957 and 958 Cayenne
- Ideal for repair or preventative cooling system maintenance
Related reference numbers
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95857215010
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