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Porsche > 911 & 912 (1965-1989) > Engine Rebuild Parts > Fuel System Parts >

Fuel Expansion Tank

Fuel Expansion Tank

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DISPLAYING 1 to 12 (of 12 products)
Braided Fuel Hose (7.3mm ID, 13.5mm OD) - Sold by the Metre - for Porsche 356 / 911 Carrera / 912 / 914 - 99918003050, 9991800305A - 0895517313
1
Braided Fuel Hose (7.3mm ID, 13.5mm OD) - Sold by the Metre - for Porsche 356 / 911 Carrera / 912 / 914
9991800305A/1
Product Information
Product Information

Braided Fuel Hose (Sold by the Metre) - 7.3mm Internal Diameter / 13.5mm Outer Diameter. 

This high-quality braided fuel hose is designed for multiple uses within the fuel system of various vehicles. It offers extremely low fuel permeability, excellent heat resistance, and high flexibility, making it a reliable choice for demanding applications.

Fits:
Porsche 356 1950-65
Porsche 911 Carrera 1965-1977 
Porsche 912 1967-69
Porsche 914 1970-76 

Comparable to Porsche part number(s): 99918003050 & 9991800305A

Specifications:
Inner Diameter (ID): 7.3mm
Outer Diameter (OD): 13.5mm 
Material: FPM/ECO/AR/ECO (Type 3E) – Compliant with DIN 73379-1
Complies With: EU End-of-Life Vehicles Directive

NOTE: This product is not suitable for use in fuel tanks, or for gear and/or engine oils. Always follow the manufacturer's specifications regarding operating temperatures, especially for high-performance engines exposed to extreme heat.



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Related, superseded, cross reference or alternative numbers for comparison.

9991800305A
99918003050
9991800305A

The product you are viewing cross references to these numbers
Braided Fuel Hose (9.3mm ID, 15.3mm OD) - Sold by the Metre - for Porsche 911 Carrera & Turbo / 914 / 924 / 928 - N0203591, PCG020359A - 080895519315
1
Braided Fuel Hose (9.3mm ID, 15.3mm OD) - Sold by the Metre - for Porsche 911 Carrera & Turbo / 914 / 924 / 928
PCG020359A/1
Product Information
Product Information

Braided Fuel Hose (Sold by the Metre) - 9.3mm Internal Diameter / 15.3mm Outer Diameter. 

This high-quality braided fuel hose is designed for multiple uses within the fuel system of various vehicles. It offers extremely low fuel permeability, excellent heat resistance, and high flexibility, making it a reliable choice for demanding applications.

Fits:
Porsche 911 Carrera 1965-89
Porsche 911 Turbo (930) 1975-89 
Porsche 914 1970-76
Porsche 924 1976-85
Porsche 928 1978-91

Comparable to Porsche part number(s): N0203591 & PCG020359A

Specifications:

Inner Diameter (ID): 9.3mm
Outer Diameter (OD): 15.3mm 
Material: FPM/ECO/AR/ECO (Type 3E) – Compliant with DIN 73379-1
Complies With: EU End-of-Life Vehicles Directive

NOTE: This product is not suitable for use in fuel tanks, or for gear and/or engine oils. Always follow the manufacturer's specifications regarding operating temperatures, especially for high-performance engines exposed to extreme heat.



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

PCG020359A
N0203591
PCG020359A

The product you are viewing cross references to these numbers
Fuel bleeder expansion tank set, Black. Porsche 911 1969-73 - 90120106222, 90120161922, 90120160322, 90120161822, 90120160222, 99951216002, 9970207450, 90120160124, N0235653 - 1615653110, EQ201600
2
Fuel bleeder expansion tank set, Black. Porsche 911 1969-73
90120106222/3
Product Information
Product Information
Fuel bleeder expansion tank set, BLACK.
The set includes: Fuel bleeder expansion tank, hoses, connecting pieces, clamps and rubber sleeve.

Fits:
Porsche 911 1969 - 1973

Diagram ref no 50, 51, 52, 53, 54, 55, 56, 57 and 58

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

90120106222
90120106222
90120161922
90120160322
90120161822
90120160222
99951216002
9970207450
90120160124
N0235653

The product you are viewing cross references to these numbers
Fuel bleeder expansion tank, Black. Porsche 911 1969-73 - 90120106222, 847603069894 - URO-010752
2
Fuel bleeder expansion tank, Black. Porsche 911 1969-73
90120106222/1
Product Information
Product Information
Fuel bleeder expansion tank, BLACK.

Fits:
Porsche 911 1969-73

Diagram ref no 41

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

90120106222
90120106222
847603069894

The product you are viewing cross references to these numbers
Fuel bleeder expansion tank, White. Porsche 911 1969-73 - 90120106222W, 90120106222, 847603069900 - URO-010753
2
Fuel bleeder expansion tank, White. Porsche 911 1969-73
90120106222/2
Product Information
Product Information
Fuel bleeder expansion tank. WHITE.

Fits:
Porsche 911 1969-73

Diagram ref no 41

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

90120106222
90120106222W
90120106222
847603069900

The product you are viewing cross references to these numbers
Fuel bleeder expansion tank. Porsche 911 1969-73 - 90120106222, 847603069894
2
Fuel bleeder expansion tank. Porsche 911 1969-73
Special Order item
90120106222
Product Information
Product Information
Fuel bleeder expansion tank.

Fits:
Porsche 911 1969-73

Diagram ref no 41

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

90120106222
90120106222
847603069894

The product you are viewing cross references to these numbers
Fuel expansion tank small. Porsche 911 1980-89 - 91120138100
2
Fuel expansion tank small. Porsche 911 1980-89
Special Order item
91120138100
Product Information
Product Information
Fuel expansion tank small. 

porsche

Fits:
Porsche 911 1980-89

Click 'Zoom in' for large parts diagram
Diagram ref no 8.

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

91120138100
91120138100

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Fuel expansion tank. Porsche 911 1970-73 USA - 91120107300
2
Fuel expansion tank. Porsche 911 1970-73 USA
Special Order item
91120107300
Product Information
Product Information
Fuel expansion tank for USA cars

Fits:
US variant with fuel tank venting system
Porsche 911 T/E/S 1970-73 USA Cars
Porsche 911 T-K 1972-73 USA Cars

Diagram ref no 3

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

91120107300
91120107300

The product you are viewing cross references to these numbers
Fuel expansion tank. Porsche 911 70-73 USA - 91120107300, 847603070319 - URO-010756
2
Fuel expansion tank. Porsche 911 70-73 USA
91120107300/1
Product Information
Product Information
Fuel expansion tank for USA cars

Fits:
Porsche 911 T/E/S 1970-73 USA Cars
Porsche 911 T-K 1972-73 USA Cars

Diagram ref no 3

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

91120107300
91120107300
847603070319

The product you are viewing cross references to these numbers
Fuel expansion tank. Porsche 911 74-89 - 91120107702
3
Fuel expansion tank. Porsche 911 74-89
Special Order item
91120107702
Product Information
Product Information
Fuel Expansion Tank.

porsche

Fits:
Porsche 911 1974-89
Porsche 911 (930) Turbo 1975-77

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

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

91120107702
91120107702

The product you are viewing cross references to these numbers
Fuel Hose – Fuel Tank to Expansion Chamber. Porsche 911 1978-89 - 9991811895A, 99918118950
3
Fuel Hose – Fuel Tank to Expansion Chamber. Porsche 911 1978-89
Special Order item
9991811895A
Product Information
Product Information

Fuel Hose – Fuel Tank to Expansion Chamber 
Sold per metre

High-quality fuel hose designed for Porsche 911 models from 1978 to 1989, used to connect the fuel tank to the expansion chamber.

This hose plays a vital role in the fuel system by allowing safe transfer of fuel vapours and maintaining proper tank ventilation. It ensures correct pressure balance within the fuel tank and supports efficient operation of the fuel and emissions system.

Fits:

  • 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)

Diagram ref no 5

Supplied per metre, this hose allows for custom length replacement, making it ideal for maintenance, repair, or restoration of classic Porsche 911 models. Manufactured to OEM specifications, it provides reliable performance and correct fitment.

Key Features

• Fuel hose for tank to expansion chamber connection
• Suitable for Porsche 911 (1978–1989)
• Part number 9991811895A
• Designed for fuel vapour and ventilation systems
• Sold per metre for custom lengths
• Flexible and durable construction
• OEM-style specification and performance

Function and Purpose

This hose is a key component in the fuel tank ventilation system.

It helps to:
• Connect fuel tank to expansion chamber
• Allow safe transfer of fuel vapours
• Maintain correct internal tank pressure
• Prevent fuel vapour build-up
• Support efficient fuel system operation

Why Replace Fuel Hoses

Over time, fuel hoses can degrade due to heat, age, and fuel exposure.

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

Replacing worn hoses ensures safe operation and proper fuel system performance.



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

9991811895A
9991811895A
99918118950

The product you are viewing cross references to these numbers
Fuel Hose – Fuel Tank to Expansion Chamber. Porsche 911 1978-89 - 9991811895A, 99918118950 - PKS144
2
Fuel Hose – Fuel Tank to Expansion Chamber. Porsche 911 1978-89
9991811895A/1
Product Information
Product Information

Fuel Hose – Fuel Tank to Expansion Chamber 
Sold per metre

High-quality fuel hose designed for Porsche 911 models from 1978 to 1989, used to connect the fuel tank to the expansion chamber.

This hose plays a vital role in the fuel system by allowing safe transfer of fuel vapours and maintaining proper tank ventilation. It ensures correct pressure balance within the fuel tank and supports efficient operation of the fuel and emissions system.

Fits:

  • 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)

Diagram ref no 5

Supplied per metre, this hose allows for custom length replacement, making it ideal for maintenance, repair, or restoration of classic Porsche 911 models. Manufactured to OEM specifications, it provides reliable performance and correct fitment.

Key Features

• Fuel hose for tank to expansion chamber connection
• Suitable for Porsche 911 (1978–1989)
• Part number 9991811895A
• Designed for fuel vapour and ventilation systems
• Sold per metre for custom lengths
• Flexible and durable construction
• OEM-style specification and performance

Function and Purpose

This hose is a key component in the fuel tank ventilation system.

It helps to:
• Connect fuel tank to expansion chamber
• Allow safe transfer of fuel vapours
• Maintain correct internal tank pressure
• Prevent fuel vapour build-up
• Support efficient fuel system operation

Why Replace Fuel Hoses

Over time, fuel hoses can degrade due to heat, age, and fuel exposure.

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

Replacing worn hoses ensures safe operation and proper fuel system performance.



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

9991811895A
9991811895A
99918118950

The product you are viewing cross references to these numbers
DISPLAYING 1 to 12 (of 12 products)
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About Fuel Expansion Tank

Fuel Expansion Tanks – Reliable Fuel System Venting and Pressure Control for Porsche Models

A fuel expansion tank is a key component of your Porsche’s fuel system, designed to manage pressure changes caused by fuel temperature fluctuations. As fuel warms and expands, the expansion tank provides a controlled area for vapour and liquid fuel to move, preventing leaks, vapour lock, or tank deformation.

At Design911, we supply a wide range of precision-engineered replacement fuel expansion tanks designed to perform reliably under varying temperatures and pressures. Constructed from high-strength, fuel-resistant materials, these tanks ensure consistent pressure regulation and maintain proper system operation for both modern and classic Porsche vehicles.

Whether you’re maintaining a high-performance 911 or restoring a vintage 928, our high-quality fuel expansion tanks provide peace of mind through durability, fitment accuracy, and long-term reliability.

What Do Fuel Expansion Tanks Do?

The expansion tank acts as a safety and performance component within the fuel system. It collects and stores excess vapour and liquid fuel when tank pressure increases, preventing evaporation losses and maintaining correct fuel delivery pressure.

Core Functions:

  • Balances fuel vapour and liquid expansion under heat and altitude changes.
  • Prevents leaks and deformation in the main fuel tank.
  • Reduces vapour emissions, supporting EVAP and environmental systems.
  • Maintains stable fuel flow to ensure smooth performance.

A properly functioning fuel expansion tank keeps your Porsche running efficiently while protecting against fuel vapour emissions and performance inconsistencies.

Why Do Fuel Expansion Tanks Fail?

Fuel expansion tanks are constantly exposed to fuel vapour, heat cycles, and pressure variations. Over time, these conditions can cause the tank to crack, deform, or lose its sealing integrity.

Common Causes of Failure Include:

  • Cracking or warping from heat and fuel vapour pressure.
  • Deterioration of plastic or rubber materials due to age and fuel exposure.
  • Blocked vent lines or valves, creating excess internal pressure.
  • Corrosion or contamination, especially in older vehicles.
  • Damage during refuelling or servicing.

A damaged expansion tank can lead to fuel odours, leaks, inconsistent tank pressure, or check-engine warnings, especially in vehicles with EVAP monitoring systems.

Why Replace with Precision-Engineered Fuel Expansion Tanks?

Replacing a worn or cracked expansion tank ensures that your Porsche’s fuel system remains efficient, compliant, and leak-free. Precision-engineered components provide the correct venting characteristics and pressure control to match your vehicle’s performance demands.

Key Benefits:

  • Restores fuel pressure balance and system efficiency.
  • Prevents fuel odours and vapour leaks.
  • Improves cold and hot starting reliability.
  • Reduces emissions and maintains EVAP system function.
  • Constructed from high-grade, fuel-resistant materials.
  • Designed for perfect fitment on a wide range of Porsche models.

A quality replacement expansion tank not only protects your vehicle’s performance but also preserves fuel economy and environmental compliance.

Highlights:

  • Comprehensive range of fuel expansion tanks for Porsche models.
  • Manufactured from durable, heat- and fuel-resistant materials.
  • Ensures consistent fuel pressure and venting performance.
  • Direct-fit replacement for easy installation and reliability.
  • Essential for maintaining emission and fuel system integrity.
  • Perfect for classic and modern Porsche vehicles.

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