sealing cap Genuine Porsche part 477955455

Water reservoir.
Fits:
Porsche 924 1978-87
Porsche 944 1982-87

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Related, superseded, cross reference or alternative numbers for comparison.

477955451F

The product you are viewing cross references to these numbers

Rear wiper motor delete plug.
Porsche ref no 477845333
For cars with 27mm hole in the screen. If your car has 17mm hole please see part  7313.
Fits:
944 S2 Turbo (1989-)
968 all
This blind plug when disassembling the rear wiper for clean and visually inconspicuous sealing the hole in the rear window.
A nice side effect:
The reduced weight due to the dismantling of the wiper motor ensures the automatic opening of the tailgate even when unlocked.
Production:
The cap is made of black matt-coated aluminum and is sealed on both sides with rubber pads.
Click 'Zoom in' for large parts diagram.
Diagram ref no 45

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Related, superseded, cross reference or alternative numbers for comparison.

4001

The product you are viewing cross references to these numbers

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.

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Related, superseded, cross reference or alternative numbers for comparison.

477955455

The product you are viewing cross references to these numbers

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

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Related, superseded, cross reference or alternative numbers for comparison.

477955455

The product you are viewing cross references to these numbers

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

The product you are viewing cross references to these numbers

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