adapter Genuine Porsche part 477955456

Code: 477955456

Genuine Porsche part

adapter

The product code 477955456 was also found on these diagrams

904-010 - connection piece

Windscreen washer system 924 >> 1978

904-015 - connection piece

Windscreen washer system 924 1979

Additional information:

• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.

Before purchasing thoroughly check part to confirm compatibility.

Related products

Check Valve for Windscreen washer (L-Shape). Porsche 911 / 964 / 968 / 924 / 944 / 928

477955481

Product Information

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.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

477955481

477955481

The product you are viewing cross references to these numbers

Check Valve for Windscreen washer (L-Shape). Porsche 911 / 964 / 968 / 924 / 944 / 928

477955481/1

Product 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

477955481

The product you are viewing cross references to these numbers

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adapter Genuine Porsche part 477955456