Land Rover Discovery L319 Fuel Tank Breather Tank Hose Pipe Line AH22-9F321-BA

Land Rover Discovery 4 Fuel Tank Vent Hose is an original fuel system component from the hoses, pipes, and tubes group, designed for Land Rover Discovery 4 models. It ensures proper tank venting, stable fuel system operation, and safe fuel vapor discharge.

Specifications and technical data

• SKU: AH22-9F321-BA
• Mark: Land Rover
• Condition: Used
• OEM Part Number: AH22-9F321-BA
• Substitutable numbers: AH22-9F321-BA, AH229F321BA, LR013802
• Part type: Line
• Category: Hoses, Lines & Pipes

Purpose and Function in the Fuel System

This fuel tank vent hose is a fuel system component responsible for controlled vapor discharge and pressure equalization within the tank. A properly functioning hose:

• stabilizes pressure in the fuel tank during refueling and engine operation,
• reduces the risk of leaks and spills around the tank,
• supports the correct operation of the vapor emission system (EVAP) and fuel level sensors,
• lessens the load on other fuel system components, such as the pump or supply lines.

Thanks to the correct routing and diameter of the hose, fuel vapor flow is controlled, leading to predictable vehicle behavior under various operating conditions.

Original Origin and Fitment

This hose belongs to the group of original Land Rover components, meaning it offers full compatibility with the factory design of the Discovery 4. This includes:

• precise geometric fit to the mounting points and hose routing on the body and near the fuel tank,
• retention of the original hose diameter and flexibility, crucial for proper vapor flow,
• compatibility with original connectors and mounting brackets in the vehicle.

This ensures a predictable installation process, without the need for modifications or additional adapters.

Condition, Inspection, and Service Application

This item is a used part, sourced from disassembly, and offered as a used part, providing a cost-effective solution for users seeking an original component at a reasonable price. This type of hose is particularly useful in situations where:

• the old hose has suffered cracks, perishing, or mechanical damage,
• there are refueling issues (fuel nozzle kicking off, excessive tank pressure),
• diagnostics indicate a ventilation system leak or EVAP system errors,
• a comprehensive fuel system repair is necessary after a collision or corrosion of components around the tank.

Using an original hose allows for the restoration of fuel system operating parameters to near-factory levels, without the risk of incompatibility often associated with universal aftermarket parts.

Benefits of Using an Original Vent Hose

Replacing the vent hose with an original component from the Land Rover hoses, pipes, and tubes group offers several practical benefits:

• maintaining predictable vehicle behavior during refueling and driving,
• reducing the risk of fuel odor around the vehicle resulting from leaks,
• maintaining compliance with factory requirements for fuel vapor emissions,
• easier fuel system diagnostics due to the use of a component with known specifications.

For workshops and services specializing in the Land Rover brand, this also serves as a reliable reference point for Discovery 4 fuel system repairs.

Other Land Rover Hoses, Pipes, and Tubes

If you also need other Land Rover hoses, pipes, and tubes for comprehensive fuel system or other component servicing, check out our dedicated category: Land Rover hoses, pipes, and tubes. You will find a wide selection of parts tailored for various models of this brand.

For users interested in selecting parts for modern powertrains, we have also prepared a practical service guide: Pre-purchase checklist for a turbocharger and intercooler for the BMW B58 engine in the 3 Series (G20), which shows how to approach verifying component compatibility and condition step-by-step before installation.