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- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 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.1 Macan S / GTS 3.0L 2014-18
Porsche 95B.1 Macan Turbo 3.6L 2014-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95B121407
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne 3.2L V6 2003-06
- 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 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
Coolant Expansion Tank (Water Tank Reservoir)
Keep your Porsche Cayenne's cooling system operating
efficiently with this OE Match Coolant Expansion Tank (Water Tank Reservoir).
Manufactured to the original factory specification, this
direct replacement provides the
correct fit, capacity and connection points for a straightforward installation.
Fits:
- Porsche 955 Cayenne 3.2L V6 2003-06
(D9J
Engines)
- Porsche 955 Cayenne S 4.5L V8 2003-06 (T90 / T91 Engines)
- Porsche 955 Cayenne Turbo 4.5L 2003-06 (T90 / T91 Engines)
- Porsche 955 Cayenne Turbo S 4.5L 2006>> (T90 / T91 Engines)
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
Diagram ref no. 1
The expansion tank is a vital part of the engine cooling system, storing coolant as it expands during normal engine operation and returning it to the cooling system as temperatures decrease. Replacing a worn or leaking reservoir helps maintain the correct coolant level, prevents overheating and protects the engine from costly damage.
What Does the Coolant Expansion Tank Do?
The coolant expansion tank performs several essential functions within the engine cooling system.
Its primary roles include:
- Providing a reservoir for expanding engine coolant.
- Maintaining the correct coolant level throughout the cooling system.
- Allowing coolant to return to the radiator and engine as temperatures fall.
- Helping maintain the correct system pressure when used with the pressure cap.
- Assisting with bleeding trapped air from the cooling system.
- Providing a convenient point for checking and topping up coolant.
A correctly functioning expansion tank is essential for maintaining stable engine operating temperatures.
Why Does the Expansion Tank Fail?
Expansion tanks are subjected to constant temperature fluctuations and system pressure, which can eventually weaken the plastic housing.
Common causes of failure include:
- Age-related plastic fatigue.
- Hairline cracks caused by repeated heating and cooling cycles.
- Coolant leaks around hose connections.
- Damage caused by excessive cooling system pressure.
- Discolouration and brittleness from prolonged engine bay heat.
- Internal contamination reducing coolant quality.
A leaking or cracked expansion tank can lead to coolant loss, low system pressure and engine overheating if left unrepaired.
When Should It Be Replaced?
Replacement is recommended when:
- Coolant leaks are visible around the tank.
- The reservoir has become cracked or distorted.
- The plastic has become brittle or heavily discoloured.
- Coolant level warnings occur without any obvious hose leaks.
- The cooling system is being overhauled.
- Replacing other ageing cooling system components during preventative maintenance.
Replacing the expansion tank before it fails can help prevent overheating and reduce the risk of expensive engine repairs.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95510614723
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne 3.2L V6 2003-06
- 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 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
Fits:
Porsche 955 Cayenne MKI 2003-06
Porsche 957 Cayenne MKII 2007-10
Porsche 958 Cayenne MKIII 2011>>
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95552860701
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne 3.2L V6 2003-06
- 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 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 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.1 Panamera S V8 4.8L 2009-13
- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
- Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
- Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 970.2 Panamera Diesel V6 3.0L (250Hp) 2014-16
- Porsche 970.2 Panamera S E-Hybrid V6 3.0L (416Hp) 2014-16
Fits:
Porsche 955 Cayenne 3.2L / S 4.5L V8 2004-06
Porsche 955 Cayenne 4.5L V8 TURBO 2003-06
Porsche 957 Cayenne 3.6L / S 4.8L V8 2007-10
Porsche 957 Cayenne 4.8L TURBO 2007-10
Porsche 957 Cayenne 3.0L DIESEL 2007-10
Porsche 970 Panamera S 2010-16
Porsche 970 Panamera GTS / TURBO 2010-13
Porsche 970 Panamera HYBRID 2012-16
Porsche 970 Panamera DIESEL 2012-16
Click 'Zoom in' for large parts diagram.
Diagram ref no 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95510644720
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne 3.2L V6 2003-06
- 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 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
Fits:
Porsche 955 Cayenne 3.2L 2003-06 (D9J Engines)
Porsche 955 Cayenne 4.5L S / Turbo 2003-06 (T90 / T91 Engines)
Porsche 957 Cayenne 3.6L 2007-10
Porsche 957 Cayenne 3.0L DIESEL 2007-10
Click 'Zoom in' for large parts diagram.
Diagram ref no. 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95510614723
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
