Fuel Tank Breather / Vent Line. Porsche 964 911 C2 / C4 / RS / Turbo 1989-94  ›  96420105100

Fuel tank breather / vent line for 964-generation 911 C2, C4, RS and Turbo applications, 1989–94. Part 96420105100 belongs to the tank ventilation pipework, rather than the pressurised fuel supply.

Fits

• Porsche 964 (911) 1989–94
• 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

Check fitment for your specific vehicle (model, year, engine) before ordering.

Diagram: fuel system 964 1989-94.

What This Product Does

This breather carries air and petrol vapour along the tank's ventilation route. Sound pipework and sealed joints help contain vapour within that route. It is a ventilation component, not a pump or an injector feed pipe.

Functions

• Connects sections of the tank breather circuit.
• Provides a passage for air and petrol vapour.
• Retains the factory pipework layout when replacing a deteriorated component.

Technical Details

• Part identification: 96420105100.
• Diagram designation: vent line; also described as a breather line.
• Assembly application: 964 fuel system, 1989–94.
• Quantity shown in the diagram: 1.
• Recorded diagram remark: /LL.
• Approximate weight supplied: 0.09 kg.

Symptoms of Fault

• A petrol odour near the car.
• Cracking, brittle sections or other visible deterioration.
• Damaged joints or insecure connections.
• Leaks detected when inspecting the ventilation pipework.

Why Replacement Matters

Ageing, heat and prolonged exposure to petrol vapour can damage breather pipework. Replacing a defective section helps re-establish a sealed ventilation path while preserving the factory arrangement. Inspect neighbouring hoses, clamps and supports during the repair; a new line will not resolve faults elsewhere in the assembly.

FAQs

• Does this carry the engine's pressurised fuel supply?
  No. The diagram identifies it as ventilation pipework for the tank.
• What else needs checking?
  Look for deterioration in nearby hoses and inspect their joints, clamps and supporting components.
• How do I verify the application?
  Use the VIN and relevant Porsche parts illustration to confirm that 96420105100 matches the vehicle.
• Does a petrol smell prove this line is faulty?
  No. Filler connections, the tank and other hoses can also cause odours, so establish the source before replacing components.

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Related, superseded, cross reference or alternative numbers for comparison.

96420105100

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