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Engine coolant expansion tank kit. Porsche 986 Boxster / 987.1 Boxster 1997-06 - COOLTANKKIT986.1
COOLTANKKIT986.1
Vehicle Group
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
Information
Engine coolant expansion tank kit.
The kit combines a coolant expansion tank, a pressure cap, and long-life antifreeze concentrate to deliver a complete coolant system refresh.
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2.7L / 3.2L 2005 - 2006 (9625, 9626)
Diagram ref no 8, 11, 26, 27
This OE Match kit is engineered for Porsche vehicles that utilise 99610614708 style expansion tanks - most commonly fitting Porsche Boxster 986 (1997-2004) and 987 (2005-2006) models. Always verify fitment with your specific year, engine and chassis before ordering.
The engine coolant expansion tank kit includes:
• 99610614708/1 × 1 – OE Match Coolant Expansion Tank: Precisely manufactured replacement reservoir designed to match the original Porsche part used on Boxster models. It collects excess coolant as it expands under heat and releases it back into the system as it cools down.
• 99610644704/1 × 1 – OE Match Expansion Tank Cap: A direct-fit cap that seals the coolant reservoir and helps maintain proper pressure in the cooling system, aiding heat control and preventing coolant loss.
• 00004330194 × 5 – Comma Antifreeze Coolant (1 L Red, 5-Year Concentrate): Premium antifreeze concentrated coolant that, when mixed correctly with water, delivers long-lasting protection against freezing, boiling, and corrosion.
This kit brings together all the primary components you need when servicing or refreshing the coolant expansion side of your engine’s cooling system.
The expansion tank accepts expanding coolant from the radiator and engine as temperatures rise, storing it safely and helping maintain correct coolant levels. The cap seals the system and maintains the right amount of pressure, allowing the cooling system to function efficiently. The antifreeze provided offers long-term protection against corrosion, freezing and overheating - crucial to preserving engine health and reducing wear.
Over time, the original plastic tank can become brittle or crack due to heat cycling and age, which may lead to leaks, coolant loss, or air infiltration that disrupts coolant circulation. A failing pressure cap can no longer maintain correct system pressure, reducing cooling efficiency. Replacing these components with OE Match parts helps restore reliable coolant containment and pressure stability - helping prevent costly overheating and engine damage.
Replace these parts when you notice any of the following conditions:
• Cracks or visible leaks around the expansion tank
• Discolouration or brittleness of plastic components
• Coolant level fluctuations without visible leaks
• Overheating symptoms or reduced cooling performance
• Routine coolant system maintenance interval is due
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
COOLTANKKIT986.1
The product you are viewing cross references to these numbers
The kit combines a coolant expansion tank, a pressure cap, and long-life antifreeze concentrate to deliver a complete coolant system refresh.
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2.7L / 3.2L 2005 - 2006 (9625, 9626)
Diagram ref no 8, 11, 26, 27
This OE Match kit is engineered for Porsche vehicles that utilise 99610614708 style expansion tanks - most commonly fitting Porsche Boxster 986 (1997-2004) and 987 (2005-2006) models. Always verify fitment with your specific year, engine and chassis before ordering.
The engine coolant expansion tank kit includes:
• 99610614708/1 × 1 – OE Match Coolant Expansion Tank: Precisely manufactured replacement reservoir designed to match the original Porsche part used on Boxster models. It collects excess coolant as it expands under heat and releases it back into the system as it cools down.
• 99610644704/1 × 1 – OE Match Expansion Tank Cap: A direct-fit cap that seals the coolant reservoir and helps maintain proper pressure in the cooling system, aiding heat control and preventing coolant loss.
• 00004330194 × 5 – Comma Antifreeze Coolant (1 L Red, 5-Year Concentrate): Premium antifreeze concentrated coolant that, when mixed correctly with water, delivers long-lasting protection against freezing, boiling, and corrosion.
This kit brings together all the primary components you need when servicing or refreshing the coolant expansion side of your engine’s cooling system.
The expansion tank accepts expanding coolant from the radiator and engine as temperatures rise, storing it safely and helping maintain correct coolant levels. The cap seals the system and maintains the right amount of pressure, allowing the cooling system to function efficiently. The antifreeze provided offers long-term protection against corrosion, freezing and overheating - crucial to preserving engine health and reducing wear.
Over time, the original plastic tank can become brittle or crack due to heat cycling and age, which may lead to leaks, coolant loss, or air infiltration that disrupts coolant circulation. A failing pressure cap can no longer maintain correct system pressure, reducing cooling efficiency. Replacing these components with OE Match parts helps restore reliable coolant containment and pressure stability - helping prevent costly overheating and engine damage.
Replace these parts when you notice any of the following conditions:
• Cracks or visible leaks around the expansion tank
• Discolouration or brittleness of plastic components
• Coolant level fluctuations without visible leaks
• Overheating symptoms or reduced cooling performance
• Routine coolant system maintenance interval is due
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
COOLTANKKIT986.1
99610614708
99610614703
99610614704
99610614705
99610614706
99610614707
The product you are viewing cross references to these numbers
About kit
This kit is comprised of the following items:
1 x Coolant bottle. Porsche Boxster 986 / Boxster 987 1997-06 (99610614708/1
1 x Coolant reservoir / expansion tank cap. Porsche Boxster 986 / Boxster 987 / Cayman 987C / 996 / 997 (99610644704/1
5 x Antifreeze 1Ltr Concentrate Bottle 5 year Red (00004330194
Price: €211.18
In stock
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Information
Water reservoir bleeder valve.
Fits:
Porsche 95B.1 Macan S 3.0L / Turbo 3.6L 2014 - 2019
Porsche 970 Panamera / S / GTS / TURBO / HYBRID 2010 - 2016
Porsche 981 Boxster 2012 - 2016
Porsche 981C Cayman 2014 - 2016
Porsche 981C Cayman GT4 2016
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Porsche 991.2 2017 - 2019 All models
Porsche 992.1 2019 - 2024 All models
Porsche 958 Cayenne 3.6L V6 2011 - 2018
Porsche 958 Cayenne 4.8L V8 2011 - 2018
Diagram ref no 3
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7P5121671B
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Fits:
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Porsche 970 Panamera / S / GTS / TURBO / HYBRID 2010 - 2016
Porsche 981 Boxster 2012 - 2016
Porsche 981C Cayman 2014 - 2016
Porsche 981C Cayman GT4 2016
Porsche 991.1 2012 - 2016 All models
Porsche 991.2 2017 - 2019 All models
Porsche 992.1 2019 - 2024 All models
Porsche 958 Cayenne 3.6L V6 2011 - 2018
Porsche 958 Cayenne 4.8L V8 2011 - 2018
Diagram ref no 3
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Vehicle Group
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- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
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- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
Information
Water Tank Reservoir.
Fits:
Porsche 991 2011>>
This part number supersedes following numbers:
- 99110615703
- 99110615704
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
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This part number supersedes following numbers:
- 99110615703
- 99110615704
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
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- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
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- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
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Information
Coolant bottle level sensor.
Fits:
Porsche 981 Boxster 2012-16
Porsche 718 (982) Boxster 2017>>
Porsche 981 Cayman 2012-16
Porsche 718 (982) Cayman 2017>>
Porsche 991.1 2012-16
Porsche 991.2 2017>>
Porsche 970 Panamera 2010-16
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
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97060650300
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Fits:
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Porsche 991.2 2017>>
Porsche 970 Panamera 2010-16
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
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Price: €9.44
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