MPA Electrical 11239N Alternator

Alternator for Dodge Ram 2500 and Ram 3500

MPA Electrical 11239N is a 12-volt alternator built for 2007-2009 Dodge Ram 2500 and 2007-2010 Dodge Ram 3500 applications with a Bosch alternator setup. It delivers 132 amps and uses an 8-groove serpentine clutch pulley for proper belt engagement in the charging system.

Key Features

• 132 amps output for charging-system performance
• 12-volt design for standard light-duty and heavy-duty truck electrical systems
• Internal fan construction
• External regulator configuration
• Clockwise rotation
• 8-groove serpentine clutch pulley
• Clock position: 10:30
• Manufacturer: Bosch

Product Details

This MPA Electrical alternator, part number 11239N, is specified for Ram truck fitments that use a Bosch alternator. The unit is configured with an external regulator, clockwise rotation, and an internal fan, making it a direct-spec replacement for charging-system service on the Dodge Ram 2500 and Dodge Ram 3500. If you are replacing a worn charging unit on a 2007-2010 Ram 3500 or a 2007-2009 Ram 2500, verify pulley style, regulator type, and connector match before installation. Part number 11239N is also a useful reference when comparing replacement options for the same application.

Common Issues This Part Addresses

• Low battery charging output
• Battery warning light or charging-system warning
• Dim lights or electrical instability at idle
• Alternator bearing or pulley wear
• Charging failure on Bosch-equipped Ram trucks

Installation Notes and Tips

Confirm the vehicle uses a Bosch alternator before ordering. Match the 8-groove serpentine clutch pulley, external regulator setup, and clockwise rotation to the original unit. Check belt condition, electrical connections, and charging voltage after installation to verify proper system operation. Part number 11239N should be compared against the removed alternator for connector and mounting alignment.

Quality Assurance

MPA Electrical supplies replacement electrical components for charging and starting applications. This alternator is built to the listed specifications for fitment on Ram 2500 and Ram 3500 models with Bosch alternator equipment.