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Check Valve for Windscreen washer (L-Shape). Porsche 911 / 964 / 968 / 924 / 944 / 928 - 477955481
477955481/1
Vehicle Group
- 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
Information
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477955481
The product you are viewing cross references to these numbers
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
477955481
The product you are viewing cross references to these numbers
Price: €10.12
Orderable
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- Porsche 997 MK1 GT3 / GT3 RS 2007-09
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Information
Windshield washer pump.
Please note: If the car has a square plug you will require connector #99965019040
Fits:
Porsche 987 Boxster 2005>>
Porsche 987C Cayman 2005>>
Porsche 997 2005>>
Porsche 970 Panamera MKI
Porsche 971 Panamera MKII
Porsche 991 MKI
Porsche 991 MKII
Porsche 981 Boxster
Porsche 981C Cayman
Porsche 982 Boxster
Porsche 982C Cayman
Porsche 992.1 Carrera
Porsche 9J1 Taycan
Porsche GT4
Porsche Boxster Spyder
Porsche 991 MKII
Porsche 981 Boxster
Porsche 981C Cayman
Porsche 982 Boxster
Porsche 982C Cayman
Diagram ref no 9
Related reference numbers
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99662817200
The product you are viewing cross references to these numbers
Please note: If the car has a square plug you will require connector #99965019040
Fits:
Porsche 987 Boxster 2005>>
Porsche 987C Cayman 2005>>
Porsche 997 2005>>
Porsche 970 Panamera MKI
Porsche 971 Panamera MKII
Porsche 991 MKI
Porsche 991 MKII
Porsche 981 Boxster
Porsche 981C Cayman
Porsche 982 Boxster
Porsche 982C Cayman
Porsche 992.1 Carrera
Porsche 9J1 Taycan
Porsche GT4
Porsche Boxster Spyder
Porsche 991 MKII
Porsche 981 Boxster
Porsche 981C Cayman
Porsche 982 Boxster
Porsche 982C Cayman
Diagram ref no 9
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99662817200
1198500500
1198501100
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1K5955651
246-082-008-025Z
246082008025Z
PAB955651
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Price: €26.18
In stock
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Information
Washer Pump Hose Line.
This hose ensures proper fluid delivery and reliable operation of the washer system, even under temperature fluctuations and repeated use. Made from durable automotive-grade material that resists cracking, collapsing, and chemical degradation, it provides long-lasting performance as part of the vehicle’s washer plumbing.
What This Product Does:
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The Washer Pump Hose Line is a washer system component specifically designed for select Porsche 981 / 982 / 991.1 / 991.2 models. This hose line connects the washer pump to the washer fluid reservoir and the windscreen (and/or rear window) jets, allowing washer fluid to flow efficiently throughout the system whenever activated.
Fits:
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- Porsche 991.1 Carrera C2 3.4L (350Bhp) 2012-16
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- Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C4S 3.8L (400Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560Bhp) 2014-16
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- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
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- Porsche 991.2 Cabriolet 2S 3.0L (420 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S 3.0L (420 Bhp) 2016-19
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- Porsche 991.2 Targa 4S 3.0L (420 Bhp) 2016-19
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- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
This hose ensures proper fluid delivery and reliable operation of the washer system, even under temperature fluctuations and repeated use. Made from durable automotive-grade material that resists cracking, collapsing, and chemical degradation, it provides long-lasting performance as part of the vehicle’s washer plumbing.
What This Product Does:
- Provides a fluid path from the washer pump to the windscreen washer jets
- Ensures consistent washer fluid flow when the pump is activated
- Resists kinking, collapsing, and heat exposure under the bonnet
- Works as part of the complete washer system (pump, reservoir, jets, tubing)
- No fluid spray from the windscreen jets when the washer is activated
- Weak or intermittent spray — fluid flow is reduced or inconsistent
- Visible fluid leaks around the hose, pump, or under the vehicle
- Fluid loss — reservoir empties quickly without visible spray
- Collapsed or brittle hose material visible on inspection
- Unusual noises from the washer pump (indicating it’s running dry)
- A functioning windscreen washer system is essential for maintaining clear vision in rain, snow, dust, and road debris conditions. Replacing a faulty hose restores effective spray and improves driving safety.
- Running the washer pump with a blocked or leaking hose can lead to premature pump failure — a more expensive component to replace than the hose itself.
- This hose line is engineered to withstand heat, movement, and chemical exposure. A proper replacement helps maintain washer system reliability over the long term.
Related reference numbers
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99162866900
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Price: €19.81
In stock
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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
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- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
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- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
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- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
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- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
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Information
Hose Line For Washer Jet.
Diagram Ref No 14
What This Product Does:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99162866707
The product you are viewing cross references to these numbers
The Hose Line for Washer Jet is a washer system tubing component designed for Porsche 911 991.1, 991.2, 981, 982 vehicles. This hose is part of the washer fluid delivery system that carries washer fluid from the washer pump and main plumbing to individual washer jet nozzles mounted on the bonnet (front windscreen) and/or rear hatch.
This hose line is designed to withstand heat, cold, and exposure to washer fluids without cracking, kinking, or collapsing. It provides a precise fit, reliable seals, and long-lasting service life — ensuring your washer jets continue to spray fluid correctly when needed.
Fits:
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
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- Porsche Boxster 718 2.0L PDK (300 Bhp)
- Porsche Boxster S 718 2.5L Manual (350 Bhp)
- Porsche Boxster S 718 2.5L PDK (350 Bhp)
- Porsche Boxster T 718 2.0L Manual (300 Bhp)
- Porsche Boxster T 718 2.0L PDK (300 Bhp)
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp)
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp)
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp)
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp)
- Porsche Boxster Spyder 718 4.0L (420 Bhp)
- Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp)
- Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp)
- Porsche Cayman 718 2.0L Manual (300Bhp)
- Porsche Cayman 718 2.0L PDK (300Bhp)
- Porsche Cayman S 718 2.5L Manual (350Bhp)
- Porsche Cayman S 718 2.5L PDK (350Bhp)
- Porsche Cayman T 718 2.0L Manual (300Bhp)
- 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 991.1 Carrera C2 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C2S 3.8L (400Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C4S 3.8L (400Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560Bhp) 2014-16
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500Bhp) 2015-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S 3.0L (420 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S 3.0L (420 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S 3.0L (420 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S 3.0L (420 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S 3.0L (420 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Speedster 4.0L (510Bhp) 2019
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
Diagram Ref No 14
What This Product Does:
- Transports washer fluid to one or more washer jet nozzles
- Maintains a sealed, kink-free fluid feed path
- Works with the washer pump, reservoir, and other hose lines to ensure proper system function
- Helps deliver consistent spray volume and pressure at the washer jets
- Supports both front windscreen and rear window washer circuits depending on vehicle configuration
- No fluid spray from one or more washer jets
- Weak or intermittent spray (fluid drips instead of sprays)
- Fluid leaks under the bonnet or near the washer jets
- Puddles of washer fluid where the hose runs
- Hose appears cracked, brittle, flattened, or soft
- Washer fluid reservoir loses fluid quickly after use
- Washer jets only spray briefly before losing flow
Why Replacement Matters:
- Clear visibility is critical for safe driving. A functioning washer system is essential for removing rain, bugs, dust, and road grime from the windscreen.
- A broken or leaking hose can lead to fluid loss and force the washer pump to run dry — which can damage the pump over time.
- Even a small plumbing part like a washer hose can affect the perceived condition and value of the vehicle if left leaking or broken.
- Designed to withstand engine-bay heat and washer fluid exposure, this hose offers dependable long-term service.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99162866707
99162866701
99162866702
99162866703
99162866704
99162866705
99162866706
99162866707
The product you are viewing cross references to these numbers
Price: €32.37
In stock