Please wait… 
Please wait while we process your order,
do not press the back button…
do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Category Filter
Engine coolant filler neck lid. Porsche 981 / 982 Boxster / Cayman - 98110604406
98110604406/1
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
- Porsche Cayman GT4 Clubsport
- Porsche Cayman GT4 RS Clubsport 2020-2024
Information
Engine coolant filler neck lid
OE Match engine coolant filler neck lid for Porsche 981 and 982 Boxster and Cayman, including the specified Spyder, GT4 and Clubsport applications. This replacement closes the coolant filling access point.
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
What This Product Does
The lid forms the closure at the coolant filling neck, covering the opening between servicing operations. It helps exclude debris and keeps the access area properly closed after coolant maintenance.
Functions
- Closes the coolant filling opening.
- Shields the access point against dirt.
- Restores the closure when the previous lid is damaged or absent.
- Allows the filling area to be closed again following service work.
Technical Details
- Brand: OE Match.
- Supplied part reference: 98110604406.
- Identified in the supplied diagrams as a coolant end cap or water closure cap.
- Located within the coolant reservoir and filling-neck assembly.
Symptoms of Fault
- Visible cracks, distortion or broken sections.
- A closure that sits loosely or cannot be refitted correctly.
- An uncovered filling opening following loss of the lid.
- Residue or debris around the access point requiring inspection.
- Brittleness or damage discovered during reservoir maintenance.
Why Replacement Matters
Repeated handling, ageing and exposure to heat can leave the closure damaged or poorly seated. Renewing an unsuitable lid restores the intended closure of the filling access point. OE Match develops replacement components around Porsche applications, using original references and fitment checks to guide specification.
Inspect the adjoining neck before installation. Coolant loss or temperature warnings require diagnosis of the cooling system rather than assuming this access lid is responsible.
Reference Numbers
98110604406; 98110604405; 98110604404; 98110604403. Compare the vehicle's original reference and application details when selecting a replacement.
FAQs
Is it the expansion-tank pressure cap?
No. The supplied assembly diagrams distinguish this filling-neck closure from the separate reservoir pressure cap.
When should the lid be renewed?
Replace it if damaged, absent, distorted or unable to seat securely. Check the neck for related damage at the same time.
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: £16.95
In stock
Also found on these pages
Related products
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
Vehicle Group
- 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 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)
Information
Gasket for coolant reservoir cap.
Fits:
Porsche 982 Boxster 2017>>
Porsche 982C Cayman 2017>>
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
982121687
The product you are viewing cross references to these numbers
Fits:
Porsche 982 Boxster 2017>>
Porsche 982C Cayman 2017>>
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
982121687
982121687
The product you are viewing cross references to these numbers
Price: £9.09
Orderable