Washer pumps / bottles / jets

Captive cage nut M6
Sold each

M6 Cage nut – the cage nut is used in various location
924S: Front valance securing
944 1982 – 1985: Front panel (cars with air conditioning)
944 turbo / S2: Rear lower spoiler securing
914: Windscreen washer bottle mounting

What This Product Does

This captive nut provides a fixed threaded mounting point for an M 6 fastener within the windscreen washer system assembly.

Technical Details

• Part number: 99950733602
• Thread size: M 6
• Application: windscreen washer system

Check fitment for your specific vehicle, model, year and engine before ordering.

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99950733602

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Check Valve for Windscreen washer (L-Shape)
This is a Genuine Porsche OE check valve / L-shape washer valve for the windscreen washer system. It is designed as a small inline valve fitted into the washer-fluid hose circuit.  The L-shaped design allows the washer hose to be routed neatly while maintaining correct washer-fluid flow direction.
Sold individually, quantity required depends on model and washer system layout

Fits:
Porsche 911 1981 - 1989
Porsche 964 1989 - 1994
Porsche 968 >> 1993
Porsche 924 1977 - 1988
Porsche 928 1978 - 1986
Porsche 944 1983 - 1991

Diagram ref no 29

This valve fits in the windscreen washer-fluid hose system, between the washer fluid supply and the windscreen washer jets. It is used as an inline check valve/connector in the front washer pipework and helps maintain correct fluid direction and hose routing.

The washer check valve can become blocked, brittle, cracked or internally worn over time. When it fails, the washer jets may respond slowly, spray weakly, leak fluid back through the line or stop delivering washer fluid correctly. Replacing the valve with a Genuine Porsche OE L-shape check valve helps restore correct washer-fluid flow and keeps the windscreen washer system operating as intended. This is especially important for safe visibility in poor weather or dirty road conditions.

When to replace:
•  If the washer jets have delayed spray after activation
•  If washer-fluid pressure is weak or inconsistent
•  If fluid drains back from the washer lines
•  If the original valve is cracked, brittle or leaking
•  If the washer hose connection is loose or damaged
•  During washer hose, washer jet or washer pump repairs
•  When restoring the windscreen washer system to OE specification.

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477955481

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Check Valve for Windscreen washer (L-Shape)
This OE Match L-shape check valve is a replacement one-way valve used in the windscreen washer system on selected Porsche models. It is designed to control washer fluid flow through the washer hose circuit and helps prevent fluid from draining back into the reservoir.
Sold individually, quantity required depends on model and washer system layout

Fits:
Porsche 911 1981 - 1989
Porsche 964 1989 - 1994
Porsche 968 >> 1993
Porsche 924 1977 - 1988
Porsche 928 1978 - 1986
Porsche 944 1983 - 1991

Diagram ref no 29

The check valve allows washer fluid to flow in one direction toward the washer jets while stopping reverse flow when the washer system is not in use. This helps keep fluid closer to the spray nozzles, improving washer response when the windscreen washer is activated.

Functions:
• Controls one-way washer fluid flow
• Helps prevent washer fluid from draining back through the hose
• Supports faster washer jet response
• Helps maintain washer system pressure
• Reduces delay before fluid reaches the windscreen
• Helps prevent air pockets in the washer line
• OE Match replacement for the original L-shape washer check valve.

Why Replace This Part?
A faulty check valve can allow washer fluid to drain back into the system, causing delayed spray, weak washer jet output, or no fluid delivery at first activation. The valve can also become blocked, cracked, brittle, or leak due to age, washer fluid additives, and engine bay heat. Replacing the check valve helps restore reliable washer operation and keeps the windscreen cleaning system working correctly.

When to replace:
•  Washer fluid takes too long to reach the windscreen
•  Washer jets spray weakly or inconsistently
•  Fluid drains back after the washer system is used
•  The valve is cracked, leaking, blocked, or brittle
•  Washer hoses have been replaced or removed
•  The washer system has air in the lines
•  The windscreen washer system is being restored or repaired.

Where it fits on the car
This L-shape check valve fits in the windscreen washer hose circuit, between the washer reservoir/pump and washer jets. Depending on the model and washer hose layout, it may be positioned near the washer nozzles, under the front bonnet, or along the washer fluid line.

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477955481

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Fabric hose for wiper system, 3 m

Fits:
Porsche 911 Carrera (1974 - 1989)
Porsche 911 Turbo (1975 - 1989)
Porsche 924 (1976 - 1985)
Porsche 924 S (1986 - 1988)
Porsche 924 Turbo (1979 - 1982)
Porsche 928 (1978 - 1982)
Porsche 928 S (1980 - 1986)
Porsche 944 (1982 - 1985) excluding Turbo

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PCG02030110

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Headlamp washer hose 10x16mm
Sold in 1m lengths

Fits:
Porsche 911 - 1978 to 1989
Porsche 964 - 1989 to 1994
Porsche 924 - 1976 to 1978
Porsche 944 - turbo 1985 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995

Click 'Zoom in' for large parts diagram.
Diagram ref no 4 and 5

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99918180640

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Headlamp Washer Hose 10x16 – Sold Per Metre

High-quality headlamp washer hose designed for a wide range of Porsche models including 911, 964, 924, 944, 968, and 928.

With a 10mm internal diameter and 16mm outer diameter, this hose is ideal for use within the headlamp washer system, ensuring reliable delivery of washer fluid to the headlight cleaning nozzles.

Fits:
Porsche 911 - 1978 to 1989
Porsche 964 - 1989 to 1994
Porsche 924 - 1976 to 1978
Porsche 944 - turbo 1985 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995

Diagram ref no 4 and 5

Supplied per metre, this flexible hose allows you to cut to the exact length required—perfect for repairs, restorations, or custom routing within the washer system.

Manufactured for durability and resistance to washer fluid, temperature changes, and ageing, this hose is suitable for long-term use in demanding automotive environments.

Key Features

• Headlamp washer hose (10mm ID / 16mm OD)
• Suitable for multiple Porsche models
• Sold per metre for flexible installation
• Ideal for headlight washer systems
• Resistant to washer fluid and environmental exposure
• Durable and flexible construction

Function and Purpose

This hose is a key part of the washer system.

It helps to:

• Deliver washer fluid to headlamp cleaning nozzles
• Maintain proper operation of the headlight washer system
• Ensure clear visibility in adverse conditions
• Replace ageing or damaged washer hoses

Why Replace Washer Hoses

Over time, washer hoses can degrade due to age and exposure.

Common issues include:

• Cracking or hardening
• Fluid leaks
• Blockages or restricted flow
• Disconnection or poor fitment

Replacing the hose restores proper washer system functionality.

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99918180640

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Headlamp washer jet pressure control valve. 
Fits - left or right

Fits:
Porsche 911 1978-89
Porsche 944
Porsche 924
Porsche 928

Click 'Zoom in' for large parts diagram.
Diagram ref No. 10

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477955183

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Headlamp washer pump. 

Fits:
Porsche 911 1974-79 (Original pump is no longer available. This is retrofit pump)
Porsche 911 1980-89
Porsche 924 1979-85
Porsche 924S 1986-88
Porsche 928 1978-95
Porsche 944 1982-91
Porsche 964 1989-94

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191955681

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Headlamp Washer Pump.
Maintain clear headlamp visibility and reliable washer system performance with this OE Match Headlamp Washer Pump, manufactured as a direct replacement. Produced to OE-style specifications, this electric washer pump delivers washer fluid from the reservoir to the headlamp washer nozzles, helping remove dirt, salt, and road grime from the headlamp lenses for improved visibility and safer driving.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• 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  

Over time, the original pump can fail due to worn internal components, electrical faults, corrosion, or contamination from debris within the washer system. A faulty pump can leave the headlamp washers inoperative, reducing cleaning performance and potentially affecting visibility in poor weather conditions. This OE Match replacement restores dependable operation, making it ideal for routine maintenance and high-quality restoration projects.  

What This Product Does:

• Pumps washer fluid to the headlamp washer nozzles.
• Helps keep headlamp lenses clean.
• Improves visibility in poor weather conditions.
• Removes dirt, salt, insects, and road grime from the headlamps.
• Restores reliable washer system performance.
• Provides OE-style fit and operation.
• Replaces worn, leaking, or failed original washer pumps.

Symptoms Of Wear Or Failure:

• Pumps washer fluid to the headlamp washer nozzles.
• Helps keep headlamp lenses clean.
• Improves visibility in poor weather conditions.
• Removes dirt, salt, insects, and road grime from the headlamps.
• Restores reliable washer system performance.
• Provides OE-style fit and operation.
• Replaces worn, leaking, or failed original washer pumps.

Why Replacement Matters:

• The headlamp washer pump plays an important role in maintaining clean headlamp lenses, particularly during wet or winter driving conditions where road dirt and salt can quickly reduce light output. A faulty pump can leave the washer system inoperative, compromising visibility and reducing driving safety.
• Replacing a worn or failed washer pump restores reliable fluid delivery and effective headlamp cleaning. Manufactured to OE-style specifications, this OE Match replacement provides the correct fit, dependable performance, and long-lasting durability, helping to keep your Porsche's lighting system operating as intended.

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Stopper, Sealing Cap.

The Genuine Porsche Stopper / Sealing Cap (Part Number: 99906301541) is an original equipment sealing component used in the windscreen washer reservoir assembly of selected classic Porsche models.

Fits:

• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988  

Diagram Ref No 25

The sealing cap is designed to close a designated opening in the washer fluid reservoir, helping maintain the integrity of the container and preventing unwanted fluid escape from the sealed opening.

This component is associated with the windscreen washer systems fitted to selected Porsche 924S, 944 and 911 (964) models.

Porsche reference 99906301541 supersedes the earlier reference 99906301540.

Although relatively small, the stopper plays an important role in maintaining the condition and functionality of the washer reservoir assembly.

The windscreen washer system stores cleaning fluid in a reservoir and delivers it to the windscreen through an electrically operated pump, connecting hoses and washer jets.

The stopper closes the reservoir opening for which it is specified, helping prevent washer fluid from leaking through that location.

Over time, the original sealing cap may become worn, hardened, cracked, distorted or damaged during removal and servicing.

A damaged or missing stopper can allow washer fluid to escape, potentially causing a gradual reduction in the reservoir's fluid level.

Depending on the location of the opening, leakage may become particularly noticeable after the reservoir is filled or while the vehicle is moving.

Replacing a defective stopper with a Genuine Porsche component helps restore the intended reservoir seal, reduce unwanted fluid loss and maintain the original washer system arrangement.

Ideal for washer reservoir repairs, windscreen washer system maintenance and classic Porsche restoration, this Genuine Porsche Sealing Cap provides an original equipment replacement for compatible applications.

What This Product Does:
The stopper is a sealing component fitted to a designated opening in the windscreen washer fluid reservoir.

Its primary function is to close that opening and help keep washer fluid contained within the reservoir.

The washer system relies on an adequate supply of cleaning fluid to remove dirt, road spray and other contamination from the windscreen.

If an unused or designated reservoir opening is not properly sealed, fluid may leak from the container instead of remaining available for the washer pump.

The stopper helps maintain the reservoir's intended configuration without requiring replacement of the entire container when only the sealing component is defective.

Its main functions include:

• Sealing the reservoir opening: Closes the specific opening for which the stopper is designed.
• Preventing washer fluid leakage: Helps keep cleaning fluid inside the reservoir.
• Maintaining fluid levels: Reduces unnecessary fluid loss through the sealed opening.
• Supporting washer system reliability: Helps ensure washer fluid remains available when required.
• Providing secure closure: Maintains the intended fit within the reservoir opening.
• Protecting the reservoir interior: Helps limit the entry of unwanted dirt or contamination through the closed opening.
• Maintaining original reservoir configuration: Preserves Porsche's specified washer fluid container arrangement.
• Supporting component servicing: Allows a damaged seal to be replaced separately where appropriate.
• Reducing unnecessary fluid consumption: Helps prevent repeated refilling caused by leakage at the stopper.
• Supporting vehicle maintenance: Helps keep the windscreen washing system in serviceable condition.

Symptoms Of Wear Or Failure:
The washer reservoir sealing cap does not contain moving parts, but it can deteriorate through age, chemical exposure, temperature changes and repeated removal.

A damaged stopper may no longer fit securely or provide an effective seal.

Common symptoms and signs include:

• Washer fluid leakage: Fluid may escape from the reservoir opening around the stopper.
• Repeated loss of washer fluid: The reservoir level may gradually fall without the washer system being operated.
• Dampness around the reservoir: Moisture or washer fluid residue may appear near the sealed opening.
• Visible cracks: Ageing or physical damage may cause the stopper to split.
• Hardened material: Deterioration may reduce the stopper's ability to seal against the reservoir.
• Distorted shape: A deformed stopper may no longer fit correctly.
• Loose fitment: The component may become insecure within the opening.
• Missing stopper: An uncovered opening may permit fluid loss or contamination.
• Damaged sealing edge: Cuts or tears may prevent a consistent seal.
• Fluid leakage after refilling: The reservoir may leak when filled above the height of the affected opening.
• Contamination around the opening: Dirt or debris may accumulate where the stopper is damaged or missing.
• Repeated need to top up the washer reservoir: An unresolved leak may cause the fluid level to decrease more quickly than expected.
• Poor sealing after previous repairs: Incorrect installation or use of the wrong replacement component may cause persistent leakage.
• Visible ageing: Surface deterioration may indicate that the original stopper should be inspected.

Why Replacement Matters:
Replacing a defective washer reservoir stopper helps maintain the correct sealing arrangement of the windscreen washer system.

A cracked, loose or missing sealing cap may allow washer fluid to escape, resulting in unnecessary fluid loss and reduced washer system availability.

Continued leakage can also cause fluid to accumulate around surrounding components and may leave the windscreen washer reservoir empty when cleaning fluid is needed.

Installing a Genuine Porsche replacement Stopper / Sealing Cap helps to:

• Restore the reservoir seal: Replace a defective component that no longer closes the opening properly.
• Prevent unwanted fluid loss: Help stop washer fluid escaping from the affected location.
• Maintain washer fluid availability: Keep more cleaning fluid available for windscreen washing.
• Reduce repeated refilling: Address unnecessary fluid consumption caused by a confirmed stopper leak.
• Maintain correct component fitment: Restore the intended original equipment sealing arrangement.
• Replace damaged sealing material: Renew a cracked, hardened or distorted stopper.
• Prevent contamination: Help protect the reservoir from dirt entering through an open or damaged sealing point.
• Support windscreen visibility: Maintain the washer fluid supply required for normal screen cleaning.
• Avoid unnecessary reservoir replacement: Repair the sealing point where the reservoir itself remains serviceable.
• Support classic Porsche restoration: Restore the original washer system using a Genuine Porsche component.
• Maintain factory specifications: Use the correct Porsche part reference rather than an unverified substitute.
• Support long-term system reliability: Replace deteriorated sealing components before further fluid loss occurs.

Replacement is recommended when inspection confirms that the stopper is missing, damaged, distorted or leaking.

If the reservoir opening itself is cracked or damaged, replacing the stopper alone may not resolve the problem.

Related reference numbers
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99906301541

The product you are viewing cross references to these numbers

Valve washer bottle pipe. 

Fits:
Porsche 911 - 1974 to 1989
Porsche 924 - 1976 to 1985
Porsche 924S - 1986 to 1988
Porsche 944 - 1985 to 1991

Click 'Zoom in' for large parts diagram.
Diagram ref no 3


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91162874901

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Washer fluid reservoir cap.

Fits:
Porsche 924 1977-85
Porsche 924 S 1976-77
Porsche 944 1983-87

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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Washer Fluid Reservoir Cap.

The OE MATCH Washer Fluid Reservoir Cap is a high-quality replacement component designed to provide a secure closure for the windscreen washer fluid reservoir on Porsche 924 and 944 models.

Fits:

• Porsche 924 1977-85
• Porsche 924 S 1976-77
• Porsche 944 1983-87

Diagram Ref No 3

Manufactured to match the original equipment fitment, this replacement cap helps keep washer fluid safely contained within the reservoir while protecting the washer system against dirt, dust and other contaminants.

Over time, original reservoir caps can become brittle, cracked, loose or damaged due to ageing, temperature changes and regular maintenance. A damaged or missing cap can allow washer fluid to escape and contaminants to enter the reservoir, potentially affecting the performance of the windscreen washer system.

The OE MATCH Washer Fluid Reservoir Cap offers a practical and cost-effective solution for restoring the correct reservoir closure, maintaining reliable washer system operation and preserving the original appearance of the engine compartment.

Ideal for routine servicing, preventative maintenance and classic Porsche restoration projects.

What This Product Does:
The washer fluid reservoir cap is an essential component of the vehicle's windscreen washer system, performing several important functions:

• Secures the Washer Fluid Reservoir: Provides a reliable closure to help prevent washer fluid from escaping during driving.
• Prevents Contamination: Helps protect the washer fluid from dirt, dust, debris and other contaminants that could enter the reservoir.
• Reduces Fluid Spillage: Minimises the risk of washer fluid splashing out of the reservoir during cornering, braking or travelling over uneven roads.
• Protects Washer System Components: Helps reduce the risk of contaminants reaching the washer pump, hoses and spray jets.
• Maintains Washer Fluid Availability: Helps retain sufficient washer fluid for effective windscreen cleaning when required.
• Maintains Original-Style Fitment: Provides a suitable replacement for the original reservoir cap, helping preserve the factory-style appearance of the washer system.

Symptoms Of Wear Or Failure:
The washer fluid reservoir cap can deteriorate over time through prolonged exposure to temperature fluctuations, ageing and regular use. Common symptoms include:

• Cracked or Split Cap: Visible cracks or fractures in the plastic material.
• Loose or Poor Fitment: The cap no longer fits securely onto the reservoir opening.
• Missing Reservoir Cap: The original cap has been lost or displaced, leaving the washer reservoir exposed.
• Washer Fluid Leakage: Fluid may spill or splash from the reservoir opening, particularly while driving.
• Brittle or Deteriorated Plastic: The cap may become hardened, discoloured or fragile with age.
• Damaged Retaining or Sealing Surfaces: Worn or distorted areas may prevent the cap from closing correctly.
• Contaminated Washer Fluid: Dirt or debris may enter the reservoir through an improperly closed opening.
• Frequent Washer Fluid Top-Ups: Unexplained fluid loss may indicate spillage from a loose or damaged cap, although leaks elsewhere in the washer system should also be checked.

Why Replacement Matters:
Replacing a worn, damaged or missing washer fluid reservoir cap is a simple but important maintenance task that helps protect the vehicle's windscreen washer system.

Key Benefits of Replacement:

• Restores a secure closure to the washer fluid reservoir.
• Helps prevent washer fluid leakage and unnecessary spillage.
• Protects the reservoir against dirt, dust and debris.
• Reduces the risk of contamination affecting the washer pump and spray jets.
• Helps maintain reliable windscreen washer system operation.
• Replaces cracked, brittle, loose or missing original caps.
• Maintains original equipment-style fitment and appearance.
• Provides a cost-effective preventative maintenance solution.
• Ideal for classic Porsche servicing and restoration.

A damaged washer fluid reservoir cap may seem like a minor issue, but maintaining a properly closed reservoir helps ensure washer fluid remains clean and available when needed.

Replacing the cap helps preserve the efficiency of the windscreen washer system, supporting clear visibility and safer driving in wet or dirty road conditions.

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477955455

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Water reservoir.

Fits:
Porsche 924 1978-87
Porsche 944 1982-87

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