MPA Electrical 13989 Alternator

Remanufactured Bosch Alternator for GM Applications

MPA Electrical Part Number 13989 is a remanufactured 12-volt alternator built for select Buick, Chevrolet, Oldsmobile, and Pontiac applications. It is specified at 105 amps and uses an internal regulator, internal fan, clockwise rotation, and a 6-groove serpentine pulley for the listed Bosch alternator applications.

Key Features

• 105 amp output for the listed charging system applications
• 12-volt remanufactured alternator construction
• Internal regulator and internal fan
• Clockwise rotation
• 6-groove serpentine pulley
• Bosch manufacturer specification
• Part Number 13989 for direct catalog lookup

Product Details

This MPA Electrical remanufactured alternator is built around Bosch-style fitment requirements for GM vehicles that use the specified charging system configuration. It is a direct replacement option for applications such as the 2005 Buick Century, 2005 Chevrolet Impala, 2005 Chevrolet Monte Carlo, 2004-2005 Pontiac Grand Am, 2004 Oldsmobile Alero, 2003 Chevrolet Malibu, 1999-2001 Oldsmobile Silhouette, 1999-2001 Pontiac Montana, and 1999 Pontiac Trans Sport. Part Number 13989 also cross-references BBB Industries 13770 for the same application.

The remanufactured design supports replacement of a worn or failed alternator while maintaining the listed amperage, pulley type, and regulator configuration. Use the vehicle’s existing alternator specifications to confirm Bosch alternator match, pulley groove count, and rotation before installation.

What This Alternator Helps Resolve

• Battery warning light caused by charging system failure
• Low battery voltage after driving
• Dim lights or electrical load issues at idle
• Intermittent charging output from a failing alternator
• No-charge condition on the listed Buick, Chevrolet, Oldsmobile, and Pontiac applications

Installation Notes and Tips

Verify the original alternator matches the listed 105 amp, 12-volt Bosch configuration with a 6-groove serpentine pulley, internal regulator, internal fan, and clockwise rotation. Confirm vehicle fitment by year, make, model, and alternator specification before installation. After replacement, inspect belt condition, pulley alignment, battery state of charge, and charging voltage to confirm proper system operation.

Quality Assurance

MPA Electrical remanufactured components are built for replacement use in specified charging system applications. This alternator is cataloged to match Bosch alternator requirements for the listed GM vehicles and is identified by Part Number 13989.