FWGC 13939R Alternator

Alternator for Nissan Charging Systems

This 12-volt alternator is built for vehicles that need stable charging output and consistent electrical performance. It is a direct-fit replacement for select Nissan applications and uses an internal regulator, internal fan, and a decoupled clutch pulley for modern serpentine belt systems.

Key Features

• 110-amp output for dependable electrical supply
• Internal regulator for integrated voltage control
• Internal fan design for compact alternator packaging
• Clockwise rotation with a 6-groove serpentine pulley
• Pulley included for installation-ready replacement
• HITACHI family construction

Product Details

Power Select alternators are engineered to deliver the amperage needed for today’s vehicle electrical loads. This unit uses proprietary components and manufacturing processes aimed at long service life and consistent performance. It is a practical replacement choice for Nissan Altima and Nissan Sentra charging-system service, including applications that require a 110-amp alternator with a serpentine belt drive. Part number 13939R is also referenced as 13939 in BBB Industries interchange data.

Common Issues This Part May Address

• Battery warning light caused by weak charging output
• Dim lights or unstable electrical performance
• Charging system failure from worn internal components
• Belt-driven alternator noise related to pulley wear
• Voltage irregularities from a failing regulator

Installation Notes

Verify pulley type, rotation direction, amperage rating, and connector match before installation. This alternator is specified for clockwise rotation and a serpentine belt setup, so confirm the vehicle’s original charging-system configuration before replacement. Part number 13939R should be matched to the original unit and fitment listing for the exact application.

Quality Assurance

Power Select alternators are manufactured with proprietary components and processes intended to support maximum life and performance.