Fuel Tank & Parts

12 x 17mm Braided Fuel Tank Breather Hose – Fuel Tank Ventilation
Sold per metre

High-quality 12 x 17mm braided fuel tank breather hose designed for use in fuel tank ventilation systems across a wide range of vehicles.

This hose is specifically engineered to safely transport fuel vapours, maintaining proper tank ventilation and preventing pressure build-up within the fuel system. The braided outer layer provides added durability and protection while retaining flexibility for easy routing.

Fits:

• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1982-84
• 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

Diagram ref no 39

Sold per metre, this hose allows for precise length requirements, making it ideal for maintenance, repair, or restoration of fuel tank breather and ventilation systems.

Key Features

• 12mm internal diameter, 17mm outer diameter
• Braided outer layer for durability and protection
• Designed for fuel tank breather and ventilation systems
• Suitable for fuel vapour transport
• Sold per metre for custom length applications
• Flexible and easy to install
• OEM-style appearance and performance

Function and Purpose

This breather hose is an essential component of the fuel system.

It helps to:
• Vent fuel vapours safely from the tank
• Prevent pressure build-up within the fuel system
• Maintain correct tank ventilation
• Support efficient fuel system operation
• Reduce risk of fuel odours and vapour leaks

Why Replace Breather Hoses

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

Common issues include:
• Cracking or splitting
• Hardening and reduced flexibility
• Fuel vapour leaks
• Blocked or restricted airflow

Replacing worn hoses ensures proper ventilation and safe system operation.

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Related, superseded, cross reference or alternative numbers for comparison.

N0203621

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Fuel tank restraining strap, right.

Fits:
Porsche 924 1976-85 (Not GT/Turbo)
Porsche 924 S 1986-88
Porsche 944 1982-85

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

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477201302

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Fuel tank strap set - 3 pieces

Fits:
Porsche 924 2.0ltr - 1976 to 1985 (not Turbo/GT)
Porsche 924S 2.5ltr - 1986 to 1988
Porsche 944 2.5ltr06/1981 to 07/1985

Diagram ref no 33, 34 and 35

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477201302

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This OE Match metal fuel tank has a 62L capacity and suits the specified Porsche 924, 924S and early 944 applications. It provides a replacement option when the existing tank is damaged, corroded or persistently contaminated.

Fits

• Porsche 924 2.0L 1975-1985 (not Turbo/GT)
  
• Porsche 924S 2.5L 1986-1988
  
• Porsche 944 2.5L 06/1981-07/1985
  
  

Check fitment for your specific vehicle (model, year, engine) before ordering. The Turbo/GT exclusion applies to this product despite references to those models within the assembly diagrams.

Diagram ref no 1

What This Product Does

The tank holds petrol for the vehicle’s fuel system. It works with separate supply connections, ventilation components and the fuel-level sender; faults in those associated parts should also be investigated when tracing odours or leakage.

Functions

• Stores the vehicle’s petrol supply.
• Provides the reservoir feeding the fuel-delivery system.
• Works with the filler, sender and breather arrangements.
  
  

Technical Details

• Product reference: 477201021F. Capacity: 62 litres. Construction: metal. Brand: OE Match.
  
  

Symptoms of Fault

• Petrol odour, particularly following refuelling.
• Wetness or staining near seams, outlets or sender connections.
• Sediment discovered during servicing or repeatedly obstructed fuel filters.
• Visible deterioration around the tank and its supporting hardware.
  
  

Why Replacement Matters

Renewal may be necessary where corrosion has weakened the tank, physical damage has caused leakage or internal deposits continue contaminating the fuel. Inspect surrounding hoses, mounting straps, seals and ventilation connections during the repair rather than assuming every related fault originates in the tank.

FAQs

• Does a petrol smell confirm tank failure?
  No. Check filler hoses, ventilation pipework and sealing points before identifying the tank as the cause.
• Can cleaning resolve contamination?
  It may help, but a severely rusted interior can continue releasing particles after cleaning.
• Which associated parts need inspection?
  Examine the sender seal, outlet seals, breather grommets, filler connections and retaining hardware while access is available.

Related reference numbers
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477201021F

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Fuel Tank, 62L, Metal.
This Dansk 62-litre fuel tank is a direct replacement component designed to store and supply fuel safely to the vehicle’s engine. It is built to match OE specifications for correct fitment and reliable performance. The tank stores petrol securely and feeds it to the fuel system through the pump and fuel lines, ensuring a stable and consistent fuel supply during vehicle operation.

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 1982-87

  
Diagram Ref No 1

What This Product Does:

• Storing fuel safely until it is required by the engine
• Supplying fuel to the fuel pump and lines for delivery to the engine
  
• Maintaining consistent fuel flow to support proper engine performance
  
• Preventing fuel leakage and vapour escape through sealed construction
  
  

Symptoms Of Wear Or Failure:

• Fuel leaks or fuel smell around the vehicle
• Visible rust or corrosion on the tank
• Fuel contamination caused by internal rust debris
• Reduced fuel capacity due to deformation or internal damage
• Fuel delivery issues or engine stalling caused by debris entering the system

Why Replacement Matters:

• Safety – Prevents dangerous fuel leaks and fire hazards
  
• Engine reliability – Ensures clean, uninterrupted fuel supply
  
• Fuel system protection – Stops rust particles from contaminating pumps and injectors
  
• Correct vehicle operation – Restores original fuel capacity and system integrity

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477201021F

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Hose, 12 x 2.5. 

The Genuine Porsche Hose, 12 × 2.5 mm (Part Number: 99918107240) is an original equipment hose used within the fuel tank ventilation and fuel vapour management systems of selected classic Porsche models.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 924 2.0L 1980-85
• 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  

This hose is listed in Porsche parts catalogues for selected Porsche 911 SC, 930 Turbo and 944 applications, where it connects components of the fuel tank ventilation or activated charcoal canister system.

The fuel tank ventilation system manages the movement of air and petrol vapour as fuel is consumed and temperature changes affect pressure inside the tank.

The hose provides a flexible passage between the specified ventilation components, helping maintain the intended vapour routing and allowing the fuel tank to breathe through its designed ventilation circuit.

Manufactured to Porsche's original equipment specification, the hose has nominal dimensions of 12 × 2.5 mm, corresponding to a 12 mm internal diameter and 2.5 mm wall thickness.

The hose is intended to be cut to the correct length for its particular installation, where supplied as bulk hose.

During normal operation, fuel tank ventilation hoses are exposed to petrol vapour, changing temperatures and vehicle vibration. These conditions can gradually affect the flexibility and condition of the hose material.

Over time, an ageing hose may become brittle, cracked, split, swollen or loose at its connection points.

A damaged hose can allow petrol vapours to escape or interfere with the proper operation of the ventilation circuit. This may produce a persistent fuel smell, particularly after refuelling or when the vehicle is parked in warm conditions.

Replacing a defective hose with a Genuine Porsche component helps restore the intended fuel vapour connections, reduce unwanted vapour leakage and maintain the original ventilation arrangement.

Ideal for classic Porsche fuel system repairs, tank ventilation maintenance and restoration projects, this Genuine Porsche Hose provides a correctly specified replacement for compatible applications.

What This Product Does:
The hose forms part of the vehicle's fuel tank ventilation or fuel vapour management circuit.

Its primary function is to provide a flexible passage for air and petrol vapour between designated components.

As the engine consumes fuel, the volume of liquid within the tank decreases. The ventilation system allows the resulting changes in tank pressure to be managed.

Changes in ambient temperature also affect fuel vapour pressure. The tank ventilation arrangement accommodates these changes through its connecting hoses, expansion chambers and other components.

In vehicles fitted with an activated charcoal canister, fuel vapours are routed through the appropriate vapour management system rather than being released freely.

The hose supports these functions by maintaining the intended connection.

Its main functions include:

• Supporting fuel tank ventilation: Provides a passage for air and fuel vapour within the designated circuit.
• Helping manage tank pressure: Supports normal pressure equalisation as fuel volume and temperature change.
• Connecting ventilation components: Links the relevant expansion chambers, pipes, fittings or charcoal canister components.
• Maintaining vapour routing: Helps keep fuel vapour within the intended ventilation pathway.
• Reducing unwanted vapour escape: Maintains a secure connection when correctly installed.
• Accommodating vehicle movement: Provides flexibility between connected components.
• Maintaining unrestricted flow: Allows air and vapour to pass through the specified hose section.
• Supporting emissions equipment: Helps preserve the original vapour management arrangement on vehicles equipped with an activated charcoal canister.
• Maintaining factory hose routing: Restores the correct hose size and installation arrangement.
• Supporting fuel system reliability: Helps prevent faults associated with cracked, collapsed or disconnected ventilation hoses.

Symptoms Of Wear Or Failure:
Ageing fuel tank ventilation hoses can deteriorate through prolonged exposure to petrol vapour, heat, vibration and repeated changes in temperature.

Common symptoms and signs of a worn or damaged hose include:

• Petrol smell around the vehicle: Escaping vapours may create a noticeable fuel odour.
• Fuel smell after refuelling: Vapour leakage may become more noticeable when the tank is full.
• Fuel smell in warm weather: Increased vapour formation may expose weaknesses in the ventilation circuit.
• Visible cracking: The hose surface may develop cracks as the material ages.
• Hardened or brittle hose: Loss of flexibility can affect sealing around the connection fittings.
• Split hose ends: Cracking near connection points may allow vapour leakage.
• Loose hose connections: Deteriorated hose ends may no longer grip fittings securely.
• Disconnected hose: An insecure connection can leave part of the vapour circuit open.
• Swollen or distorted material: Ageing or chemical incompatibility may affect the hose shape.
• Collapsed hose sections: Deformation may restrict airflow through the ventilation circuit.
• Kinked hose routing: Incorrect installation can obstruct the intended ventilation passage.
• Visible abrasion: Contact with sharp edges or neighbouring components may wear through the hose.
• Unusual fuel tank pressure symptoms: A restricted ventilation system may contribute to excessive pressure or vacuum in the tank.
• Damaged hose clamps: Loose or corroded clamps may compromise secure attachment.
• Persistent vapour odours after servicing: Incorrect routing or inadequate sealing may leave a connection leaking.

Why Replacement Matters:
Replacing a deteriorated ventilation hose helps maintain the correct operation of the fuel tank breathing and vapour management system.

An old hose may become cracked or brittle, allowing fuel vapours to escape around its surface or connection points.

A collapsed or incorrectly routed hose may also restrict the normal movement of air and vapour through the system.

Installing a Genuine Porsche replacement Hose 99918107240 helps to:

• Restore the intended ventilation connection: Replace a defective section of hose.
• Reduce petrol vapour leakage: Address unwanted fuel odours caused by a confirmed hose defect.
• Maintain fuel tank breathing: Support the intended movement of air and vapour.
• Help prevent ventilation restrictions: Replace collapsed or obstructed hose sections.
• Restore secure hose attachment: Renew hardened or split hose ends.
• Preserve original hose dimensions: Use the specified 12 × 2.5 mm hose reference.
• Maintain factory hose routing: Cut and fit the correct length for the relevant application.
• Support vapour management components: Maintain connections to expansion chambers or activated charcoal canisters.
• Reduce further deterioration: Replace ageing hose material before complete failure.
• Support fuel system refurbishment: Renew old hoses during fuel tank or emissions system servicing.
• Preserve classic Porsche originality: Maintain the factory-style ventilation system.
• Provide Genuine Porsche quality: Use an original equipment hose reference for the specified application.

Replacement is recommended when the hose shows cracks, brittleness, swelling, damage, persistent vapour leakage or an insecure fit.

The surrounding clamps, connection fittings, expansion chambers and other ventilation hoses should also be inspected.

Related reference numbers
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99918107240

The product you are viewing cross references to these numbers

In Tank Fuel Filter.

Fits:
Porsche 924 1976-79
Porsche 924 S 1986-88
Porsche 944 1982-91
Porsche 928 1978-82
Porsche 928 1983-86
Porsche 928 1987-88 (For Cars without in-tank fuel pump)
Porsche 968 1992-95
Porsche 964 1989-94
Porsche 993 1995-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 27.

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92820108104

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In tank fuel filter, with rubber seal.

Fits:
Porsche 924 1976-79
Porsche 924 S 1986-88
Porsche 944 1982-91
Porsche 928 1978-82
Porsche 928 1983-86
Porsche 928 1987-88 (For Cars without in-tank fuel pump)
Porsche 968 1992-95
Porsche 964 1989-94
Porsche 993 1995-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 27.

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92820108104

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Sealing Ring for In-tank Fuel Filter.

Fits:
Porsche 924 1976-85
Porsche 924S 1986-88
Porsche 944 1982-91
Porsche 928 1978-95
Porsche 968 1992-95
Porsche 964 1989-94
Porsche 993 1994-98

Diagram ref no 41

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92820118703

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In-Tank Fuel Pump / Filter Seal – FKM Upgrade

High-quality replacement seal for the in-tank fuel filter or fuel pump, designed to fit a wide range of Porsche models.

Fits:

• 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 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
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram ref no 41

This upgraded seal is manufactured from modern fluorocarbon rubber (FKM), offering significantly improved resistance to fuel, heat, and ageing compared to standard materials. It ensures a secure and leak-free seal within the fuel tank, maintaining system integrity and safety.

Designed to OEM specifications, this seal provides precise fitment and long-lasting performance—ideal for both maintenance and restoration.

Key Features

• Direct replacement in-tank fuel pump / filter seal
• Suitable for multiple Porsche models
• Manufactured from high-quality FKM (fluorocarbon rubber)
• Superior resistance to fuel, heat, and ageing
• OEM-style fit and sealing performance
• Ideal for maintenance, repair, or fuel system restoration

Function and Purpose

This seal ensures a secure connection within the fuel tank assembly.

It helps to:

• Prevent fuel leaks from the tank assembly
• Maintain proper fuel system pressure
• Protect against vapour leaks and contamination
• Support safe and efficient fuel delivery

Why Upgrade to FKM

Original seals can degrade over time due to fuel exposure.

Benefits of FKM material include:

• Excellent resistance to modern fuels and additives
• Longer service life compared to standard rubber
• Reduced risk of hardening or cracking
• Improved sealing reliability under extreme conditions

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92820118703

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