1983 Porsche 928 Fuel Pump Replacement Parts: What You Need to Know

Replacing the fuel pump on a 1983 Porsche 928 is a job that many owners take on themselves, and having the right parts makes all the difference. This guide covers the essential components you'll need—from the pump itself to related hardware—and helps you decide between OEM and aftermarket options. Whether you're restoring a classic or keeping a daily driver on the road, understanding your choices saves time and money.

Understanding the Fuel Pump System in the 1983 Porsche 928

The 1983 928 uses a high-pressure fuel injection system with an in-tank electric fuel pump. It delivers fuel at around 50–60 psi to the fuel distributor. The pump is located inside the fuel tank, accessed through an opening under the rear cargo area carpet. Unlike some later models, the 1983 version does not have a separate external pump—everything is inside the tank. This means the replacement part must be a correct fit for the tank assembly.

Key Components in a Fuel Pump Replacement

When you buy a fuel pump for the 1983 928, you typically get the pump motor itself, but you should also consider replacing:

• Fuel pump assembly: Often includes the pump, strainer, and level sender. Many suppliers sell a complete unit that drops right in.
• Strainer/sock: A fine mesh filter that protects the pump from debris. Always replace it with the pump.
• Rubber grommet/seal: The pump mounts on a rubber sleeve inside the tank. This can harden over time and cause vibration or noise.
• Fuel line connectors: In-tank hoses and clamps may be brittle. Replacing them prevents leaks.
• Fuel filter: The external fuel filter should be changed at the same time to ensure clean flow.

Signs You Need a Fuel Pump Replacement

Before ordering parts, confirm the pump is failing. Common symptoms include:

• Engine cranks but won't start (no fuel pressure)
• Sputtering or hesitation under load or at high speed
• Whining noise from the rear of the car (pump running dry or failing)
• Hard starting when the tank is low (pump picks up air)
• Loss of power, especially uphill or when accelerating

If you have these symptoms, check the fuel pressure first. A reading below 45 psi indicates a weak pump.

OEM vs. Aftermarket Fuel Pump Parts for the 1983 928

Original OEM Parts

Porsche no longer stocks the original Bosch fuel pump for the 1983 928, but NOS (new old stock) units occasionally appear. OEM parts guarantee exact fit and performance, though they are expensive and can be hard to find. If you want originality, an NOS Bosch pump is the way to go.

Aftermarket Options

Several reputable brands manufacture direct-replacement pumps for the 928. These are typically cheaper than OEM and often just as reliable. However, quality varies. The best aftermarket pumps use the same Bosch internals but are sold under different labels. Look for pumps that meet or exceed the original specifications (flow rate, pressure, amp draw).

Important: Avoid generic universal pumps. The 1983 928 uses a specific mounting bracket, connector, and hose routing. A universal pump may require modifications that create leaks or alignment issues.

Recommended Brands and Specific Parts

Complete Assembly Kits

Some suppliers sell everything needed in one box. For the 1983 928, a complete kit typically includes the pump, strainer, grommet, and installation hardware. These are convenient and ensure compatibility.

• Pelican Parts: Offers a Bosch replacement pump (PN 928-608-101-00-M38) and a gasket/strainer kit. They also sell a complete assembly with the level sender.
• 928 Specialists (e.g., 928 International): These vendors specialize in the 928 and provide high-quality aftermarket kits that are tested for fitment. Their kits often include the rubber collar and new hoses.
• TRE Performance: Known for high-flow aftermarket pumps, but you must confirm it works with the 1983 system—some are for later 928s with different pressure requirements.

Individual Parts to Consider

• Bosch 0 580 464 070 – This is the original pump part number. NOS units can be found on vintage parts sites.
• Airtex E8269 – An aftermarket pump that fits many European cars, including the 928. It is a budget option but works if installed with new strainer and grommet.
• Fuel pump strainer: Pelican Parts PN 928-608-115-00-M100
• Tank grommet: W0133-1618843 (available from many suppliers)
• External fuel filter: Mann WK 513 or equivalent (located near the rear wheel well)

Installation Considerations

Replacing the fuel pump on a 1983 928 is a moderate DIY job. The most challenging part is removing the old pump from the tank without damaging the level sender. Plan about 2–3 hours. Key tips:

• Relieve fuel pressure before opening the system (remove fuel pump fuse and run engine until it stalls).
• Disconnect the battery for safety.
• The access cover is under the carpet in the rear hatch area—remove the spare tire cover and lift the carpet.
• Use a strap wrench or large pliers to unscrew the pump retaining ring.
• Carefully lift the pump assembly out; the level sender arm can catch on the tank opening.
• Transfer old connector if using a bare pump (some aftermarket pumps come with a new connector pigtail).
• Replace the strainer and grommet—these are inexpensive and prevent future issues.
• Reassemble and test for leaks before driving.

Cost and Budget

Expect to pay:

• Complete assembly kit: $150–$300
• Bosch OE pump (new): $200–$400
• Aftermarket pump (e.g., Airtex): $80–$120
• Strainer, grommet, filter: $20–$40 total
• Shop labor (if not DIY): $400–$600

Spending more on a quality pump and replacing all wear items is cheaper than doing the job twice.

Final Recommendation

For most 1983 Porsche 928 owners, the best approach is to buy a complete fuel pump assembly from a specialist like 928 International or Pelican Parts. These kits include the correct pump, strainer, grommet, and sometimes the level sender. They are slightly more expensive than bare pumps but guarantee fit and reliability. If you prefer originality, seek an NOS Bosch 0 580 464 070 pump and pair it with new supporting parts. Avoid generic universal pumps from auto parts stores—they rarely fit correctly and can cause running issues. Always replace the external fuel filter at the same time for optimal performance. By choosing the right parts, you'll get the 928 back on the road with confidence.