Fuel Lines & Breather Hoses

Fuel line.



Fits:
Porsche 944 S 1988-91 (Engine code M44.40 / .41)

Porsche 944 / 944 Turbo 1989-91 (Engine code M44.11 / .12 / .51 / .52)
F 94-KN404 559>>
F 95-KN101 327>>

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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94435696911

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Fuel Pipe Connector.

The Porsche Fuel Pipe Connector is a genuine OEM connecting piece designed for the fuel delivery system in classic Porsche models, including the 924 and 944. This small but vital component links sections of fuel pipe or hose, ensuring a secure and leak-free connection within the fuel system.
Over time, connectors can weaken, corrode, or crack, leading to fuel leaks and loss of pressure. Replacing it with this OEM Porsche connector restores system integrity, prevents dangerous leaks, and ensures your engine receives the correct fuel pressure for smooth performance.

Fits:

• Porsche 924 2.0L 1976-79
  
• Porsche 924 2.0L 1980-85
  
• Porsche 924S 2.5L 1986-87 
• Porsche 924S 2.5L 1988 
• Porsche 944 2.5L 8V 1982-85
  
• Porsche 944 Turbo 2.5L 8V 1985-88
  
• Porsche 944 Turbo S 2.5L 8V 1988>>
  
• Porsche 944S2 3.0L 16V 1989-91
  
• Porsche 944 Turbo 2.5L 8V 1989-91

What This Product Does:
It’s a small but essential connector in the fuel feed / fuel line system. It joins sections of fuel pipe or hose — often between the fuel pump, fuel filter, accumulator, or between pipe and hose segments.

Symptoms Of A Faulty Or Failing Fuel Pipe Connector:
If this connector is worn, damaged, or leaking, common symptoms will include:

• Fuel smell around the engine bay or under the car, especially near where this connector is installed.
• Liquid fuel leaks visible around the connector or dripping when the engine is running / fuel system is pressurized.
• Poor fuel pressure, which can lead to rough running, hesitation, or weak acceleration.
• Possibly difficulty starting if fuel supply is compromised.
• Visible damage or corrosion to the connector — cracked plastic or metal, worn threads, or loose hose / pipe connections.

 
Why Replacement Matters:
Even though it’s a small part, it’s critical:

• Fuel delivery depends on all connectors and lines being sealed and strong. A faulty connector can compromise the whole fuel feed.
• Leaks are dangerous (fire risk) and waste fuel.
• Loss of pressure or leaks can lead to poor engine performance, misfires, or engine stalling.
• Using a genuine part like this one ensures correct fit, strength, sealing finish, and avoids fitment mismatches or leaks.

Diagram Ref No 1A

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477209161

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Fuel pump to fuel filter hose



Fits:
Porsche 924S 1986-88
Porsche 944 1982-85

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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94435604114

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Porsche 924S & 944 Fuel Hose - Fuel Pump to Fuel Filter

Reliable Fuel Delivery for Classic Transaxle Porsche Models

The fuel hose from the fuel pump to the fuel filter is a critical component of the Porsche 924S and 944 fuel system. This hose transfers pressurised fuel directly from the fuel pump to the fuel filter, ensuring clean and consistent fuel supply to the engine.

Maintaining the integrity of this hose is essential for stable fuel pressure, smooth engine operation and overall vehicle safety.

Fits:

• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87

Diagram ref no 12

What This Fuel Hose Does

In the Porsche 924S and 944 fuel system, fuel is drawn from the tank by the electric fuel pump and pushed through a dedicated hose into the fuel filter. The fuel filter removes contaminants before fuel continues to the rail and injectors.

The fuel pump to filter hose is responsible for:

• Carrying pressurised fuel safely from pump to filter
• Maintaining consistent fuel pressure under load
• Preventing leaks in a high-pressure section of the system
• Supporting smooth engine idle and acceleration

If this hose fails, fuel delivery can become inconsistent or unsafe.

Why Fuel Hoses Fail on 924S and 944 Models

Fuel hoses on classic Porsche transaxle cars are often original or decades old. Over time, exposure to heat, vibration and modern ethanol-blended fuels can cause deterioration.

Common failure causes include:

• Age-related rubber hardening and cracking
• Internal breakdown from fuel permeation
• Swelling caused by ethanol content in modern fuels
• Heat cycling in the engine bay
• Abrasion against surrounding components

Because this hose operates under pressure, even minor cracks or weakness can result in leaks or pressure loss.

When You Should Replace This Fuel Hose

You should replace the fuel pump to fuel filter hose if you notice:

• Visible cracks, splits or softness in the hose
• Fuel smell near the rear or underside of the vehicle
• Dampness or seepage around hose connections
• Hesitation or stumbling under acceleration
• Poor fuel pressure readings
• The hose appears original or aged on a classic 924S or 944

Preventative replacement is strongly recommended during fuel pump or fuel filter service, especially on vehicles over 20 years old.

Replacing this hose helps prevent fuel leaks, improves engine reliability and protects against potential fire risk.

Quality Porsche Fuel System Parts from Design911

At Design911, we supply high-quality replacement fuel hoses designed to meet OEM standards for classic Porsche models. This fuel hose ensures correct fitment, proper pressure handling and long-term durability.

Using the correct specification hose protects your fuel system, improves reliability and maintains safe vehicle operation.

Key Benefits at a Glance

• Direct replacement for Porsche part 94435604112
• Connects fuel pump to fuel filter securely
• Maintains stable fuel pressure
• Reduces risk of leaks and fuel system failure
• Suitable for Porsche 924S and 944
• Ideal for maintenance, restoration and preventative repair       

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94435604114

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Fuel return hose to tank. 

Fits:
Porsche 944-2 (Facelift) 2.5L 1985-88
Porsche 944-2 2.7L 1989

Porsche 944 S 2.5L 1987-88
Porsche 944 S2 3.0L 1989-91

Porsche 944 Turbo / S 2.5L 1986-91

Porsche 968 3.0L 1992 - Models Without Sports Suspension (PR 030)

Diagram ref. 10.

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95135606103

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Fuel Return Hose to Tank

High-quality replacement fuel return hose designed for Porsche 944 models, connecting the fuel system return line directly to the fuel tank.

This hose plays a critical role in the fuel system by safely returning excess fuel from the engine back to the tank. It helps maintain proper fuel circulation and stable pressure, ensuring efficient engine operation and long-term reliability.

Fits:

• 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  - Models Without Sports Suspension (PR 030)
  

Diagram ref. 10

Manufactured to OEM specifications, this fuel return hose offers precise fitment along with excellent resistance to fuel, heat, and pressure—making it ideal for maintenance, repair, or restoration of Porsche 944 fuel systems.

Key Features

• Direct replacement fuel return hose (to tank)
• Suitable for Porsche 944 models
• Maintains proper fuel circulation and pressure balance
• Resistant to fuel, heat, and pressure
• OEM-style fit and performance
• Ideal for maintenance and restoration

Function and Purpose

This hose is an essential component of the fuel system.

It helps to:

• Return excess fuel safely to the tank
• Maintain stable fuel pressure
• Prevent fuel system overpressure
• Support efficient fuel circulation

Why Replace Your Fuel Return Hose

Fuel hoses degrade over time due to exposure to heat, pressure, and fuel.

Common issues include:

• Cracking or deterioration
• Fuel leaks or seepage
• Pressure imbalance within the system
• Reduced reliability and performance

Replacing the hose restores safe and consistent fuel system operation.

Related reference numbers
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95135606103

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Fuel Return Line – Fuel System Hose 

High-quality replacement fuel return line designed for Porsche 944 models from 1987 to 1988.

This hose is a critical component of the fuel system, responsible for returning excess fuel from the engine back to the fuel tank. It ensures proper fuel circulation and maintains stable system pressure, supporting efficient engine operation and long-term reliability.

Fits:

• Porsche 944S 2.5L 16V 1987-88

Diagram ref no 34

Manufactured to OEM specifications, this fuel return line provides precise fitment along with excellent resistance to fuel, heat, and pressure—making it ideal for maintenance, repair, or restoration of late Porsche 944 models.

Key Features

• Direct replacement fuel return line
• Suitable for Porsche 944 (1987–1988)
• Maintains proper fuel circulation and pressure balance
• Resistant to fuel, heat, and pressure
• OEM-style fit and performance
• Ideal for maintenance and restoration

Function and Purpose

This hose is an essential part of the fuel system.

It helps to:

• Return excess fuel safely to the tank
• Maintain stable fuel pressure
• Prevent overpressure within the system
• Support efficient fuel circulation

Why Replace Your Fuel Return Line

Fuel hoses degrade over time due to exposure to heat, pressure, and fuel.

Common issues include:

• Cracking or deterioration
• Fuel leaks or seepage
• Pressure imbalance within the system
• Reduced engine reliability and performance

Replacing the hose restores safe and consistent fuel system operation.

Related reference numbers
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94435602717

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Fuel return hose.

Fits:
Porsche 944 S 1987-88

Click 'Zoom in' for large parts diagram.
Diagram ref no 33

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94435602720

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Fuel Return Line – Fuel System Hose 

High-quality replacement fuel return line designed for Porsche 944 models from 1987 to 1988.

This hose is a critical component of the fuel system, responsible for returning excess fuel from the engine back to the fuel tank. It ensures proper fuel circulation and maintains stable system pressure, supporting efficient engine operation and long-term reliability.

Fits:

• Porsche 944S 2.5L 16V 1987-88

Diagram ref no 33

Manufactured to OEM specifications, this fuel return line provides precise fitment along with excellent resistance to fuel, heat, and pressure—making it ideal for maintenance, repair, or restoration of late Porsche 944 models.

Key Features

• Direct replacement fuel return line
• Suitable for Porsche 944 (1987–1988)
• Maintains proper fuel circulation and pressure balance
• Resistant to fuel, heat, and pressure
• OEM-style fit and performance
• Ideal for maintenance and restoration

Function and Purpose

This hose is an essential part of the fuel system.

It helps to:

• Return excess fuel safely to the tank
• Maintain stable fuel pressure
• Prevent overpressure within the system
• Support efficient fuel circulation

Why Replace Your Fuel Return Line

Fuel hoses degrade over time due to exposure to heat, pressure, and fuel.

Common issues include:

• Cracking or deterioration
• Fuel leaks or seepage
• Pressure imbalance within the system
• Reduced engine reliability and performance

Replacing the hose restores safe and consistent fuel system operation.

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

94435602720

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Fuel return line.



Fits:
Porsche 944 S 1988-91 (Engine code 4440 / 4441)

Porsche 944 / 944 Turbo 1989-91 (Engine code 4411 / 4412 / 4451 / 4452)
F 94-KN404 559>>
F 95-KN101 327>>

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

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94435693711

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Fuel Supply Hose 

High-quality replacement fuel supply hose designed for Porsche 944 2.7ltr, 944 S2, and 944 turbo models.

This hose is a key component of the fuel delivery system, responsible for supplying fuel under pressure between critical fuel system components. It ensures consistent fuel flow, supporting efficient combustion, engine performance, and reliability—especially in higher-output S2 and turbo variants.

Fits:

• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1989-91

Diagram ref no 32

Manufactured to OEM specifications, this fuel supply hose offers precise fitment along with excellent resistance to fuel, heat, and pressure—making it ideal for maintenance, repair, or restoration of Porsche 944 fuel systems.

Key Features

• Direct replacement fuel supply hose
• Suitable for Porsche 944 2.7L, S2 & Turbo models
• Maintains consistent fuel delivery under pressure
• Designed for both naturally aspirated and turbocharged systems
• Resistant to fuel, heat, and pressure
• OEM-style fit and performance

Function and Purpose

This hose is an essential part of the fuel system.

It helps to:

• Deliver fuel between key fuel system components
• Maintain stable fuel pressure for injection
• Ensure consistent fuel flow to the engine
• Support efficient engine performance and drivability

Why Replace Your Fuel Supply Hose

Fuel hoses degrade over time due to heat cycles, pressure, and fuel exposure.

Common issues include:

• Cracking or deterioration
• Fuel leaks or seepage
• Reduced fuel pressure or flow
• Engine hesitation or poor performance

Replacing the hose restores safe and reliable fuel system operation.

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94435602914

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Fuel supply hose.



Fits:
Porsche 944 S 1987-88
Porsche 944 S2
Porsche 944 Turbo 1989-91


Click 'Zoom in' for large parts diagram.
Diagram ref no 32

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94435602914

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Fuel Tank Breather Hose – Tank to Filler Neck 
Sold per metre

High-quality fuel tank breather hose designed for Porsche 944 S2 Cabriolet, 944 turbo Cabriolet and 968 Cabriolet models, connecting the fuel tank to the filler neck.

Fits:

• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 968 3.0L 1992-94

Diagram ref no 39  

This hose is a key part of the fuel tank ventilation system, allowing fuel vapours to flow safely while maintaining proper pressure within the tank. It ensures efficient fuel system operation and prevents vapour build-up during refuelling and driving.

Supplied per metre, this hose allows for precise replacement and routing, making it ideal for maintenance, repair, or restoration of Porsche Cabriolet fuel systems. Manufactured to OEM specifications for durability and correct fitment.

Key Features

• Fuel tank breather hose – tank to filler neck
• Suitable for Porsche 944 S2 Cabriolet and 968 Cabriolet
• Part number 94120171311
• Designed for fuel vapour and ventilation systems
• Sold per metre for custom lengths
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose is an essential component of the fuel system.

It helps to:
• Connect fuel tank to filler neck ventilation system
• Allow safe transfer of fuel vapours
• Maintain proper internal tank pressure
• Prevent vapour build-up during refuelling
• Support efficient fuel system operation

Why Replace Breather Hoses

Over time, breather hoses can degrade due to fuel vapours and environmental exposure.

Common issues include:
• Cracking or splitting
• Fuel vapour leaks
• Hardening and loss of flexibility
• Reduced ventilation efficiency

Replacing worn hoses ensures proper fuel system performance and safety.

Related reference numbers
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94120171311

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Fuel Tank Breather Hose – Tank to Filler Neck 
Sold per metre

High-quality fuel tank breather hose designed for Porsche 944 S2 Cabriolet, 944 turbo Cabriolet and 968 Cabriolet models, connecting the fuel tank to the filler neck.

Fits:

• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 968 3.0L 1992-94

Diagram ref no 39  

This hose is a key part of the fuel tank ventilation system, allowing fuel vapours to flow safely while maintaining proper pressure within the tank. It ensures efficient fuel system operation and prevents vapour build-up during refuelling and driving.

Supplied per metre, this hose allows for precise replacement and routing, making it ideal for maintenance, repair, or restoration of Porsche Cabriolet fuel systems. Manufactured to OEM specifications for durability and correct fitment.

Key Features

• Fuel tank breather hose – tank to filler neck
• Suitable for Porsche 944 S2 Cabriolet and 968 Cabriolet
• Part number 94120171311
• Designed for fuel vapour and ventilation systems
• Sold per metre for custom lengths
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose is an essential component of the fuel system.

It helps to:
• Connect fuel tank to filler neck ventilation system
• Allow safe transfer of fuel vapours
• Maintain proper internal tank pressure
• Prevent vapour build-up during refuelling
• Support efficient fuel system operation

Why Replace Breather Hoses

Over time, breather hoses can degrade due to fuel vapours and environmental exposure.

Common issues include:
• Cracking or splitting
• Fuel vapour leaks
• Hardening and loss of flexibility
• Reduced ventilation efficiency

Replacing worn hoses ensures proper fuel system performance and safety.

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

94120171311

The product you are viewing cross references to these numbers

Fuel tank to fuel pump hose.



Fits:
Porsche 944 1985-91
Porsche 968 1992-95

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

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95135655700

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Fuel tank to fuel pump hose.

Fits:
Porsche 944 1985 - 1991
Porsche 968 1992 - 1995

Diagram ref no 23

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95135655701

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