Pierburg 7.21440.51.0 Fuel Pump

Pierburg 7.21440.51.0 Electric Fuel Pump

The Pierburg 7.21440.51.0 is a 12-volt electric fuel pump built for low-pressure fuel delivery in select classic and import applications. With a pressure range of 0.27 to 0.38 bar (3.19 to 5.51 psi), it is suited for systems that require steady, controlled fuel supply rather than high-pressure injection output.

Key Features

• Electric fuel pump for 12V systems
• Operating pressure range: 0.27-0.38 bar / 3.19-5.51 psi
• 2 electrical connectors
• 38 mm diameter with 133.5 mm total length
• 8 mm inlet and outlet diameters
• 2 amp current draw
• Pierburg part number 7.21440.51.0

Detailed Description

This Pierburg fuel pump is specified for vehicles that use a low-pressure electric supply pump, including applications such as Volkswagen Beetle, Volkswagen Jetta, Volkswagen Quantum, Mazda B2000, and Pontiac Firebird. The pump’s compact 38 mm body, 8 mm hose connections, and 12V electric operation make it a direct-fit style solution for fuel delivery systems that rely on consistent pressure and flow. The Pierburg 7.21440.51.0 is also referenced by cross-number applications such as Airtex E8016S and Four Seasons 76041 for the same type of use.

Compatible With: Fits 1970-1972 Volkswagen Beetle, Fits 1973-1979 Volkswagen Beetle, Fits 1984-1985 Volkswagen Quantum, Fits 1985-1987 Volkswagen Jetta, Fits 1979-1984 Mazda B2000, and Fits 1994-1995 Pontiac Firebird. This part number, 7.21440.51.0, is commonly searched for low-pressure fuel pump replacement on these vehicles.

What It Is Used For

• Restoring fuel delivery when the original electric pump is weak or inoperative
• Correcting hard-start or no-start conditions caused by insufficient fuel supply
• Addressing fuel starvation under load or at sustained driving speeds
• Replacing a noisy pump that no longer maintains stable low-pressure output
• Supporting proper fuel flow in carbureted or low-pressure fuel systems

Installation Notes and Tips

Verify hose size, electrical connector style, and system pressure requirements before installation. This pump uses 8 mm connections and a 2-terminal electrical layout, so matching the vehicle’s fuel line and wiring configuration is important. Confirm that the vehicle calls for a low-pressure electric pump and not a high-pressure injection pump. For best results, inspect the fuel filter, lines, and tank pickup before installing the new pump.

Quality Assurance

Pierburg is an established OE supplier name in fuel system components, and this pump is built to meet the dimensional and operating specifications listed for the application. Technical information reference: SI 1761-21.