MPA Electrical 13791 Alternator

Remanufactured Alternator for Lexus GS300 and IS300

MPA Electrical Part Number 13791 is a remanufactured 12-volt alternator built for select Lexus applications. It delivers 100 amps of output with an internal regulator, internal fan, and clockwise rotation for OE-style charging system service.

This remanufactured MPA Electrical alternator is a direct-fit charging component for Lexus GS300 and Lexus IS300 models. The 6-groove serpentine pulley and Nippondenso manufacturer specification help match the original equipment setup for proper belt alignment and charging performance.

Key Features

• 100 amp output for 12-volt charging systems
• Internal regulator for integrated voltage control
• Internal fan design
• 6-groove serpentine pulley
• Clockwise rotation
• Built to Nippondenso specifications
• MPA Electrical 13791 remanufactured alternator

Fitment Details

• Fits 1998-2005 Lexus GS300, N/A
• Fits 2001-2005 Lexus IS300, N/A

Product Description

MPA Electrical Remanufactured 13791 is an alternator for Lexus GS300 and Lexus IS300 charging system repair. It is specified at 100 amps and 12 volts, with an internal regulator and internal cooling fan to match the electrical and mechanical requirements of the original application. The Nippondenso design reference, clockwise rotation, and 6-groove serpentine pulley make this a practical OE-style replacement for vehicles using the listed fitment.

This part cross-references BBB Industries 13791 for the same application.

Common Issues This Part May Resolve

• Battery warning light caused by alternator output loss
• Low charging voltage at the battery
• Dim lights or electrical instability while driving
• Charging system failure after alternator wear
• Accessory performance issues related to weak system voltage

Installation Notes and Tips

Verify pulley groove count, belt routing, connector style, and mounting points against the original unit before installation. Confirm the vehicle uses a clockwise-rotation, internal-regulator alternator with a 6-groove serpentine pulley. After installation, check charging voltage at idle and under load to confirm proper system operation on Lexus GS300 and Lexus IS300 applications.

Quality Assurance

MPA Electrical remanufactured components are rebuilt to restore charging-system function for the listed applications. Part Number 13791 is specified for OE-style fitment and electrical output requirements on the covered Lexus models.