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Washer pumps / bottles / jets
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477955481
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 1976-79
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
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12 Month Warranty
Worldwide Delivery
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477955481
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 1976-79
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Shop Securely
12 Month Warranty
Worldwide Delivery
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99918180640
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 1976-79
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- 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
Shop Securely
12 Month Warranty
Worldwide Delivery
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99918180640
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 1976-79
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- 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
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 968 1992-95
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94462807
The product you are viewing cross references to these numbers
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 1984-89
Porsche 964 1989-94
Porsche 944 85-88 Turbo
Porsche 944 1989-91
Porsche 928 1983-95
Porsche 968 1992-95
Diagram ref No. 16
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits - RIGHT
Fits:
Porsche 964 1989-94
Porsche 993 1995-98
Porsche 968 1992-95
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9936280770001C
The product you are viewing cross references to these numbers
- 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 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits - LEFT
Fits:
Porsche 964 1989-94
Porsche 993 1995-98
Porsche 968 1992-95
- 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 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94462807200
The product you are viewing cross references to these numbers
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Shop Securely
12 Month Warranty
Worldwide Delivery
Washer Pumps, Washer Bottles & Washer Jets – Clear Vision for Every Drive
Washer pumps, bottles, and jets are key components of your Porsche’s windscreen cleaning system. They work together to deliver washer fluid from the reservoir through the pump and jets, keeping your windscreen clear of dirt, bugs, and debris for safe driving visibility in all conditions.
At Design911, we supply a comprehensive range of genuine and high-quality washer system components - including washer bottles (reservoirs), electric washer pumps, and precision spray jets — for all Porsche models such as the 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Every part is designed to offer high levels of fitment and performance for dependable cleaning power and long-term reliability.
What Do Washer Pumps, Bottles
and Jets Do?
- Washer
Bottle / Reservoir: Stores the washer fluid and is typically located
in the engine bay or boot area.
- Washer
Pump: An electric motor that pressurises the fluid and pushes it
through the lines toward the
- Washer Jets / Nozzles: Deliver a fine, even spray of fluid onto the windscreen or headlights for effective cleaning coverage.
Together, these components ensure your windscreen remains clean and streak-free, maintaining visibility and safety in all weather conditions.
Why Do Washer Components Fail?
Over time, washer system parts can degrade or fail due to
wear, contamination, or environmental exposure. Common causes include:
Symptoms of failure include weak or no spray from the jets, fluid leaks, or a pump that doesn’t activate when the washer stalk is used.
Why Replace Faulty Washer Components?
A properly functioning washer system is essential for visibility and road safety. Replacing worn or damaged components ensures your windscreen remains clean and clear in all driving conditions.
Benefits of replacement include:
- Restored washer performance and pressure.
- Improved visibility and safety in rain or road spray.
- Prevention of leaks and electrical damage.
- High-quality parts for perfect fitment and durability.
-
Fuel Pumps
-
Brake Light Switch
-
Hazard Warning Switch
-
Reverse Light Switch
-
Headlamp Switch
-
Window Switch
-
Window Motors
-
Window Mechanism
-
Wiper Motor
-
Wiper Mechanism
-
Electric Horn
-
Ignition Switch
-
Indicator / Wiper Stalk Switch
-
Roof / Sun Roof Switch
-
Relays / Fuses
-
Alarms / Security / Central Locking
-
Electronic Control Units
-
Wiper Switches
-
Dashboard / Console Parts & Switches
-
Door Mirror Switch
-
Tracker
-
Connector housing
-
Wiring harness
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed