The Alliant Power AP63405 is a new glow plug relay for 1994–2003 Ford 7.3L Powerstroke applications. Alliant’s Diesel Glow Plug Relay controls electrical power delivery to the related circuit.

Features & Benefits

• New Alliant Power Glow Plug Relay (Alliant P/N AP63405)
• Fit, form, and function tested to meet or exceed original-equipment standards (per Alliant Power)
• Direct replacement for F7TZ12B533 / F7TZ12B533A / F7TZ12B533CA
• Backed by Alliant Power’s 24-month, unlimited-mileage warranty

Application

• Ford F-350 (1994–1997)
• Ford F-250 (1994–1996)
• Ford F-250 HD (1997)
• Ford E-350 Super Duty / F-250 Super Duty / F-350 Super Duty / F-450 Super Duty / F-550 Super Duty (1999–2003)
• Ford E-350 Econoline (1994–1998)
• Ford E-350 Econoline Club Wagon (1994–2002)
• Ford E-450 Econoline Super Duty (1999–2002)
• Ford F-650 / F-750 / Excursion (2000–2003)
• Alliant Power lists additional vehicle applications for this part number

Always verify fitment against your VIN, engine, and OE part number before ordering.

Cross-Reference / Replaces

• Ford: F7TZ12B533, F7TZ12B533A, F7TZ12B533CA, F81Z12B533, F81Z12B533AC, F0TZ12B533A, F6TZ12B533AA, E7TZ12B533A, F7TA12B533CA, FOTZ12B533A
• Motorcraft: DY1023, DY1128
• Navistar: 1826634C, 1826634C94, 1831646C, 1831646C1
• Delphi: HDC908
• Alliant Power: AP63405

Warranty: Alliant Power’s standard warranty: 24 months with unlimited miles/hours on installed parts (Alliant Power warranty policy, rev. Aug 2025).