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Coolant bottle. Porsche 996 2001 >> / 997.1 / 997.2 - 99610615704
99610615704/2
Vehicle Group
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
Information
Coolant bottle. Cap included.
The engine coolant expansion reservoir - a pressure-compensating overflow reservoir that collects excess coolant as the engine warms up and coolant expands, then returns coolant to the system as it cools down. It acts as a buffer to maintain correct coolant volume, system pressure, and prevent overflow or air ingress.
Fits:
Porsche 996 3.6L C2 / C4 / C4S 2001 - 2005
Porsche 996 Turbo 2001 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKII / GT3 RS 2001 - 2005
Porsche 997.1 2005 - 2008 all models
Porsche 997.2 2009 - 2012 all models
This product supersedes Porsche's old part numbers:
- 99610615700, 99610615701, 99610615702, 99610615703, 99610615704
Over time, coolant expansion tanks are prone to degradation due to heat cycles, coolant chemical exposure, and pressure stress.
This can lead to:
• Cracks or stress fractures in the plastic tank body
• Leaks that cause coolant loss and risk of overheating or engine damage
• Loss of system pressure regulation, leading to air ingress, coolant boiling, or inefficient cooling
• Difficulty reading coolant level due to opaque or discolored plastic
Replacing the reservoir with a correctly-spec’ed tank ensures:
• Leak-free coolant containment under all operating conditions
• Proper coolant volume management through expansion and contraction cycles
• Stable cooling-system pressure and reliable thermal regulation
• Long-term reliability and prevention of coolant-related engine issues
You should replace the coolant expansion tank if you see cracks, coolant leaks, or coolant residue around or under the tank, especially after long periods of heat. If the plastic has become brittle, discoloured, or feels soft/warped, or if coolant level fluctuate without obvious cause — the tank may no longer maintain pressure or hold coolant reliably, and replacement is warranted.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610615704
The product you are viewing cross references to these numbers
The engine coolant expansion reservoir - a pressure-compensating overflow reservoir that collects excess coolant as the engine warms up and coolant expands, then returns coolant to the system as it cools down. It acts as a buffer to maintain correct coolant volume, system pressure, and prevent overflow or air ingress.
Fits:
Porsche 996 3.6L C2 / C4 / C4S 2001 - 2005
Porsche 996 Turbo 2001 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKII / GT3 RS 2001 - 2005
Porsche 997.1 2005 - 2008 all models
Porsche 997.2 2009 - 2012 all models
This product supersedes Porsche's old part numbers:
- 99610615700, 99610615701, 99610615702, 99610615703, 99610615704
Over time, coolant expansion tanks are prone to degradation due to heat cycles, coolant chemical exposure, and pressure stress.
This can lead to:
• Cracks or stress fractures in the plastic tank body
• Leaks that cause coolant loss and risk of overheating or engine damage
• Loss of system pressure regulation, leading to air ingress, coolant boiling, or inefficient cooling
• Difficulty reading coolant level due to opaque or discolored plastic
Replacing the reservoir with a correctly-spec’ed tank ensures:
• Leak-free coolant containment under all operating conditions
• Proper coolant volume management through expansion and contraction cycles
• Stable cooling-system pressure and reliable thermal regulation
• Long-term reliability and prevention of coolant-related engine issues
You should replace the coolant expansion tank if you see cracks, coolant leaks, or coolant residue around or under the tank, especially after long periods of heat. If the plastic has become brittle, discoloured, or feels soft/warped, or if coolant level fluctuate without obvious cause — the tank may no longer maintain pressure or hold coolant reliably, and replacement is warranted.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610615704
99610615703
99610615704
99610615700
99610615701
99610615702
The product you are viewing cross references to these numbers
Price: £72.50
Arriving soon
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Vehicle Group
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
- Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
- Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
Information
Engine coolant filler neck lid
This original Porsche coolant filler lid, also known as a sealing cap or coolant bottle lid, fits the coolant filler neck and helps seal the coolant access point correctly.
Fits:
Porsche 981 Boxster 2012 - 2016
Porsche 981SP Boxster Spyder 2016
Porsche 981C Cayman 2014 - 2016
Porsche 981 Cayman GT4 2016
Porsche 982 Boxster 2017 - 2024
Porsche 982C Cayman 2017 - 2024
Porsche 982 Spyder 2019 - 2024
Porsche 982 Cayman GT4 2019 - 2024
Diagram ref no 2
This part is used in the coolant filler / water supply tank area on selected Porsche 981 and 982 Boxster / Cayman models.
What This Part Does / Functions:
• Seals the engine coolant filler neck
• Helps prevent coolant splash, seepage or contamination at the filler opening
• Protects the coolant filler neck from dirt and debris
• Supports correct cooling system service access
• Replaces a cracked, damaged, missing or worn original lid
• Helps maintain a clean and properly sealed coolant filler area
• Provides correct OE Porsche fitment and finish
• Supports correct reassembly after coolant system service.
Why Replace This Part?
The coolant filler neck lid is exposed to heat, coolant residue, repeated removal and age-related plastic wear. Over time, the lid can crack, loosen, deform, become difficult to refit or go missing during cooling system service.
Replacing it with an OE Genuine Porsche engine coolant filler neck lid helps restore the correct factory seal and appearance around the coolant filler area.
Common Symptoms of a Worn or Missing Coolant Filler
• Lid Missing coolant filler neck lid
• Cracked or damaged plastic cap
• Lid no longer seats correctly
• Coolant residue around the filler neck
• Dirt or debris entering the coolant filler area.
• Loose or poor-fitting coolant bottle lid
• Damage found during coolant reservoir service
• Incorrect non-original cap fitted.
When to Replace This Part
• If the original lid is cracked, broken or missing
• If the lid no longer fits securely
• During coolant reservoir or filler neck service
• When replacing coolant system trim or access parts
• If the cap has become brittle from age or heat
• After coolant maintenance if the lid is damaged
• During engine bay / service area restoration.
Where It Fits on the Car
This lid fits on the engine coolant filler neck / coolant bottle access area. It is shown in Porsche coolant filler / water supply tank diagrams as diagram reference no. 2. Correct fitment helps keep the coolant filler area sealed, protected and finished to factory standard.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98110604406
The product you are viewing cross references to these numbers
This original Porsche coolant filler lid, also known as a sealing cap or coolant bottle lid, fits the coolant filler neck and helps seal the coolant access point correctly.
Fits:
Porsche 981 Boxster 2012 - 2016
Porsche 981SP Boxster Spyder 2016
Porsche 981C Cayman 2014 - 2016
Porsche 981 Cayman GT4 2016
Porsche 982 Boxster 2017 - 2024
Porsche 982C Cayman 2017 - 2024
Porsche 982 Spyder 2019 - 2024
Porsche 982 Cayman GT4 2019 - 2024
Diagram ref no 2
This part is used in the coolant filler / water supply tank area on selected Porsche 981 and 982 Boxster / Cayman models.
What This Part Does / Functions:
• Seals the engine coolant filler neck
• Helps prevent coolant splash, seepage or contamination at the filler opening
• Protects the coolant filler neck from dirt and debris
• Supports correct cooling system service access
• Replaces a cracked, damaged, missing or worn original lid
• Helps maintain a clean and properly sealed coolant filler area
• Provides correct OE Porsche fitment and finish
• Supports correct reassembly after coolant system service.
Why Replace This Part?
The coolant filler neck lid is exposed to heat, coolant residue, repeated removal and age-related plastic wear. Over time, the lid can crack, loosen, deform, become difficult to refit or go missing during cooling system service.
Replacing it with an OE Genuine Porsche engine coolant filler neck lid helps restore the correct factory seal and appearance around the coolant filler area.
Common Symptoms of a Worn or Missing Coolant Filler
• Lid Missing coolant filler neck lid
• Cracked or damaged plastic cap
• Lid no longer seats correctly
• Coolant residue around the filler neck
• Dirt or debris entering the coolant filler area.
• Loose or poor-fitting coolant bottle lid
• Damage found during coolant reservoir service
• Incorrect non-original cap fitted.
When to Replace This Part
• If the original lid is cracked, broken or missing
• If the lid no longer fits securely
• During coolant reservoir or filler neck service
• When replacing coolant system trim or access parts
• If the cap has become brittle from age or heat
• After coolant maintenance if the lid is damaged
• During engine bay / service area restoration.
Where It Fits on the Car
This lid fits on the engine coolant filler neck / coolant bottle access area. It is shown in Porsche coolant filler / water supply tank diagrams as diagram reference no. 2. Correct fitment helps keep the coolant filler area sealed, protected and finished to factory standard.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98110604406
98110604406
98110604405
98110604404
98110604403
The product you are viewing cross references to these numbers
Price: £22.09
In stock
Vehicle Group
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
- Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
- Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
Information
Water tank filler neck.
Fits:
Porsche 981 Boxster 2012-16
Porsche 981SP Boxster Spyder 2016
Porsche 982 Boxster 2017>>
Porsche 982SP Boxster Spyder 2019>>
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Porsche 982C Cayman 2017>>
Porsche 982C Cayman GT4 2019>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98110615005
The product you are viewing cross references to these numbers
Fits:
Porsche 981 Boxster 2012-16
Porsche 981SP Boxster Spyder 2016
Porsche 982 Boxster 2017>>
Porsche 982SP Boxster Spyder 2019>>
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Porsche 982C Cayman 2017>>
Porsche 982C Cayman GT4 2019>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98110615005
98110615005
The product you are viewing cross references to these numbers
Price: £36.17
Orderable
Engine water coolant reservoir. Porsche 982 GTS 4.0L / Cayman GT4 / Boxster Spyder
Code: 98110604706
Vehicle Group
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
Information
Engine water coolant reservoir.
Fits:
Porsche 982 Boxster GTS 4.0L 2017>>
Porsche 982 Boxster Spyder 4.0L 2019>>
Porsche 982C Cayman GTS 4.0L 2017>>
Porsche 982C Cayman GT4 4.0L 2019>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98110604706
The product you are viewing cross references to these numbers
Fits:
Porsche 982 Boxster GTS 4.0L 2017>>
Porsche 982 Boxster Spyder 4.0L 2019>>
Porsche 982C Cayman GTS 4.0L 2017>>
Porsche 982C Cayman GT4 4.0L 2019>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98110604706
98110604706
The product you are viewing cross references to these numbers
Price: £129.62
In stock
Vehicle Group
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- Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
- Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
- Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
- Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
- Porsche 970.2 Panamera Diesel V6 3.0L (250Hp) 2014-16
Information
Bleed valve for the engine coolant reservoir.
Fits:
Porsche 970 Panamera Diesel 3.0L 2012-16
Porsche 718 (982) Boxster 2.0L 2017>>
Porsche 718 (982) Boxster S 2.5L 2017>>
Porsche 718 (982) Boxster Spyder / RS 4.0L 2019>>
Porsche 718 (982) Boxster GTS 4.0L 2020>>
Porsche 718 (982) Cayman 2.0L 2017>>
Porsche 718 (982) Cayman S 2.5L 2017>>
Porsche 718 (982) Cayman GT4 / RS 4.0L 2019>>
Porsche 718 (982) Cayman GTS 4.0L 2020>>
Diagram ref. 9.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
298121671
The product you are viewing cross references to these numbers
Fits:
Porsche 970 Panamera Diesel 3.0L 2012-16
Porsche 718 (982) Boxster 2.0L 2017>>
Porsche 718 (982) Boxster S 2.5L 2017>>
Porsche 718 (982) Boxster Spyder / RS 4.0L 2019>>
Porsche 718 (982) Boxster GTS 4.0L 2020>>
Porsche 718 (982) Cayman 2.0L 2017>>
Porsche 718 (982) Cayman S 2.5L 2017>>
Porsche 718 (982) Cayman GT4 / RS 4.0L 2019>>
Porsche 718 (982) Cayman GTS 4.0L 2020>>
Diagram ref. 9.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
298121671
97010644730
298121671
The product you are viewing cross references to these numbers
Price: £10.60
Orderable