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- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Porsche 928 Windscreen Washer Reservoir Filler Neck – Redesigned High-Strength Replacement
The Porsche 928 washer filler neck is a known weak point on ageing vehicles. Over time, the original part becomes brittle, cracks during removal, or suffers corrosion due to its internal metal ring.
We have completely redesigned this windscreen washer
reservoir filler neck using modern 3D modelling technology to create a
stronger, more durable and corrosion-resistant replacement suitable for all
Porsche 928 model years — including early 1977 cars.
Fits:
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Diagram Ref No 32
What This Filler Neck Does
The filler neck connects the washer bottle to the upper fill point, allowing washer fluid to be poured safely into the reservoir.
A damaged or cracked filler neck can cause:
• Washer fluid leaks inside the wing
• Difficulty filling the washer reservoir
• Fluid spillage during refilling
• Deterioration of surrounding bodywork
Replacing the filler neck restores correct washer system operation and prevents unnecessary leaks.
Why Upgrade to Our Redesigned Porsche 928 Washer Filler Neck?
Stronger Than the Original
Our redesigned version eliminates the structural weaknesses of the factory
part. It is engineered for improved durability and long-term reliability.
No Internal Metal Ring
Unlike the original design, this filler neck does not use a metal reinforcement
ring that can rust over time. This prevents corrosion-related failure.
Maintains Original Appearance
Now produced in white with a smooth surface finish to closely match the factory
look. This ensures a clean and authentic engine bay appearance.
Fits All Left Hand Drive Porsche 928 Models
Designed to fit every LHD Porsche 928 from 1977 to 1995, including early production
cars.
Compatible With Original Cap
The genuine Porsche cover cap fits directly onto this filler neck, maintaining
OEM functionality and appearance.
Features
• Completely redesigned using 3D CAD
• High-strength construction
• No rust-prone metal ring
• White finish for factory-correct look
• Suitable for all Porsche 928 models (1977–1995)
Ideal For:
• Porsche 928 washer system restoration
• Replacing cracked or brittle filler necks
• Preventative maintenance on classic 928 models
• Engine bay refurbishment projects
• Solving washer fluid leak issues
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92852817901
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 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
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
- Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
- Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
The Porsche Genuine OE Reservoir Cap (Part No. PAA955455) is an original factory sealing cap for the windscreen washer fluid reservoir. Designed and manufactured by Porsche, this component ensures a secure seal on the washer fluid filler neck, protecting the system from contamination and fluid loss. Also commonly referred to as a washer fluid cap, sealing cap, or end cap, it is a small but essential part of the vehicle’s washer system.
Fits:
Porsche 95B.1 Macan 2014 - 2018
Porsche 95B.2 Macan 2019 - 2021
Porsche 95B.3 Macan 2022>>
Diagram ref no 3
The reservoir cap seals the washer fluid tank filler neck, preventing dirt, debris, and moisture from entering the system while also stopping fluid from splashing or evaporating.
By maintaining a closed system, it ensures reliable operation of the windscreen washer jets, helping maintain clear visibility in all driving conditions.
Functions & Technical Role
• Sealing function: Prevents washer fluid leakage and contamination
• System protection: Keeps debris and moisture out of the washer reservoir
• Fluid retention: Minimises evaporation and spillage
• Easy access: Allows quick opening for refilling washer fluid
• OEM precision: Manufactured to Porsche specifications for exact fit and durability
Fitment / Position on car
• Fitting position: Front – washer fluid system
• Location: On top of the windscreen washer reservoir filler neck
• System: Windscreen washer / cleaning system
Cross Reference / Superseded Numbers
This part cross-references and replaces several related OE numbers: 1K0955455, 3Q0955455, 95552860700, 95552860701, 958955455
Although small, a missing or damaged cap can lead to:
• Washer fluid leaks or evaporation
• Contamination of the washer system
• Reduced washer performance
• Potential blockage of washer jets
Replacing with a genuine Porsche OE cap ensures proper sealing, long-term durability, and reliable operation of the washer system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAA955455
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 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
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
- Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
- Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
Fits:
Porsche 95B.1 Macan 2014-18
Porsche 95B.2 Macan 2019-21
Porsche 95B.3 Macan 2021>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95B955986
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
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 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
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
- Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
- Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
An OE Match filler neck cap for the water (washer fluid) reservoir, designed to securely seal the fluid tank and protect the system from contamination in Porsche Cayenne and Macan models.
Fits:
Porsche 955 Cayenne 2003 - 2006
Porsche 957 Cayenne 2007 - 2010
Porsche 958 Cayenne 2011 - 2018
Porsche 95B.1 Macan 2014 - 2018
Porsche 95B.2 Macan 2019 - 2021
Porsche 95B.3 Macan 2022>>
Diagram ref no 3
This OE Match Filler Neck Cap – Water Reservoir is a high-quality replacement component designed to replicate original Porsche specifications for fit, durability, and sealing performance. Installed on the washer fluid reservoir filler neck, this cap ensures the system remains properly sealed and protected.
This cap seals the washer fluid reservoir, preventing fluid loss and protecting the system from contamination, ensuring reliable operation of the windscreen washer system.
Function
• Provides a secure seal for the washer fluid reservoir
• Prevents fluid leakage and evaporation
• Protects against dirt, debris, and contamination
• Maintains proper washer system pressure and function
• Ensures reliable windscreen cleaning performance
Cross References:
PAA955455
95552860700 / 95552860701
958955455
1K0955455 / 3Q0955455
Why Replacement Matters
A damaged or missing reservoir cap can lead to fluid contamination, leakage, and reduced washer system performance. Dirt entering the system can clog washer jets or damage the pump over time. Replacing the cap ensures the system remains clean, sealed, and fully functional.
When to replace
• Cap is missing or loose
• Visible cracks or damage to plastic
• Washer fluid leaking or evaporating
• Contamination inside the reservoir
• During routine maintenance or inspection
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAA955455
The product you are viewing cross references to these numbers