MPA Electrical 6303S Starter Motor

Remanufactured Starter for GM V8 Applications

MPA Electrical 6303S is a remanufactured 12-volt starter built with a direct drive design and a 1.5 kW rating. It uses a clockwise rotation and a 9-tooth drive, making it a direct replacement choice for select Buick, Cadillac, and Oldsmobile applications.

This starter is part of MPA Electrical’s remanufactured line, which focuses on rebuilt electrical components for charging and starting systems. The 6303S is a practical option for restoring reliable cranking performance on vehicles such as the Buick Riviera, Cadillac Eldorado, Cadillac Seville, and Oldsmobile Toronado.

Key Features

• Remanufactured starter for electrical, charging, and starting system repair
• Direct drive design for OE-style starter operation
• 1.5 kW output for 12-volt systems
• Clockwise rotation
• 9-tooth drive gear
• Manufacturer listed as Delco
• Part number 6303S for accurate ordering and cross-reference lookup

Vehicle Fitment

• Fits 1979-1985 Buick Riviera, N/A
• Fits 1979-1985 Cadillac Eldorado, N/A
• Fits 1980-1985 Cadillac Seville, N/A
• Fits 1979-1985 Oldsmobile Toronado, N/A

This part cross-references AMS Automotive 6302 and 6304 for the same application.

What It Helps Address

• Slow or weak engine cranking
• No-start conditions caused by starter failure
• Intermittent starter engagement
• Starter noise related to worn internal components
• Electrical starting system replacement on GM full-size and personal luxury models

Installation Notes

Verify 12-volt system requirements, clockwise rotation, 9-tooth drive engagement, and Delco-style starter configuration before installation. Confirm the vehicle application by year, make, and model, especially on 1979-1985 Buick Riviera, Cadillac Eldorado, Cadillac Seville, and Oldsmobile Toronado listings. Compare the original unit and connector layout to ensure proper replacement selection.

Quality Assurance

MPA Electrical remanufactured components are rebuilt for starting-system service and application-specific replacement use. Part number 6303S is cataloged for direct fitment matching and cross-reference verification.