FG164A Fuel Pump Module Assembly For 1987-1997 Ford Mustang 2.3L L4, 3.8L V6, 4.6L V8

A fuel gauge that stays on empty or full, moves erratically, reads the wrong level, or drops out over bumps can indicate a sender or float fault after the gauge circuit, wiring, connector, ground, and instrument cluster have been tested. FG164A is a fuel-tank sending unit for specified 1987–1997 Ford Mustang gasoline applications. It is not a complete fuel pump module, and the electric fuel pump is not included. Confirm the engine-year combination, OE number, sender resistance, flange, connector, pickup-tube layout, and float-arm geometry before ordering.

Ford Mustang Fuel-Level Sending Unit Application

Verified coverage includes 1987–1993 Mustang 2.3L, 1987–1995 Mustang 5.0L, 1994–1997 Mustang 3.8L, and 1996–1997 Mustang 4.6L gasoline configurations. The sending unit measures tank level and is separate from the electric fuel-pump assembly used in these vehicles.

Fitment Verification

• Confirm the exact model year and engine combination rather than using the broad 1987–1997 range alone.
• Match FG164A, E7ZZ-9275-A, F4ZZ-9275-A, F5ZZ-9275-A, or another verified interchange.
• Compare the flange, electrical connector, sender rheostat, tube position, float arm, and tank depth.
• Do not order this part to correct low fuel pressure unless testing has also identified a separate pump problem.

Part Functions and Included Components

• Fuel-level sender and float arm measure fuel level for the instrument-cluster gauge.
• Tank-mounted metal hanger and tube layout must match the original sending unit.
• The electric fuel pump is not included with the verified FG164A configuration.
• Seal, lock ring, strainer, or other service hardware should be confirmed from the package before installation.

Symptoms and Diagnostic Checks

Test sender resistance through its full travel and inspect the connector, ground, gauge wiring, and instrument-cluster circuit before replacement. A bent float arm, damaged rheostat, poor ground, corroded connector, incorrect sender range, or tank interference can cause inaccurate readings. Fuel-delivery symptoms require separate pump-pressure and electrical testing.

Installation Notes

Disconnect the battery, work in a ventilated area, and drain or safely support the tank as required. Clean the flange, use the correct new seal, position the float without bending it, and confirm free travel before securing the unit. After installation, inspect for leaks and verify the gauge changes smoothly as the fuel level changes.