MPA Electrical 7877403 Alternator

Remanufactured 105 Amp Alternator

MPA Electrical part number 7877403 is a remanufactured 12-volt alternator built for vehicles that use a Delco-style charging system. It features a 105 amp output, internal regulator, external fan, clockwise rotation, and a 4-groove serpentine pulley for the specified applications.

This remanufactured alternator line from MPA Electrical focuses on OE-style electrical replacement for charging-system service. Part number 7877403 is a direct-fit option for select Buick, Oldsmobile, and Pontiac models with air conditioning and the listed 105 amp configuration.

• 105 amp output for charging-system replacement
• 12-volt alternator with internal regulator
• External fan design
• 4-groove serpentine pulley
• Clockwise rotation
• Delco manufacturer style
• Remanufactured for the listed vehicle applications

Vehicle Fitment

• Fits 1991 Oldsmobile Cutlass Calais, N/A; fits vehicles with air conditioning.
• Fits 1988-1991 Pontiac Grand Am, N/A; w/ AC, optional, w/ 105 amp alternator.
• Fits 1986-1987 Buick Skylark, N/A; fits vehicles with air conditioning.
• Fits 1986-1987 Oldsmobile Calais, N/A; fits vehicles with air conditioning.
• Fits 1986-1987 Pontiac Grand Am, N/A; fits vehicles with air conditioning.

Common Replacement Uses

• Charging warning light or low-voltage condition
• Weak battery charging during normal driving
• Alternator noise or bearing-related charging issues
• Replacement for a failed 105 amp Delco-style alternator
• Service repair for Buick Skylark, Oldsmobile Calais/Cutlass Calais, or Pontiac Grand Am charging systems

Installation Notes

Verify pulley groove count, rotation, regulator type, amperage rating, and connector style before installation. Confirm the vehicle is equipped with air conditioning and the listed 105 amp alternator application where required. Match the part number 7877403 to the original unit and inspect the belt condition and charging connections during replacement.

Quality Assurance

MPA Electrical identifies this unit as remanufactured and built to the listed Delco-style specifications for the stated applications. Cross-reference part numbers include BBB Industries 7801-3 and related interchange references for the same application.