MPA Electrical 10378 Alternator

Remanufactured Alternator for Subaru Applications

This MPA Electrical remanufactured alternator is built for OE fit, form, and function, with testing and remanufacturing processes used to support reliable charging performance. Part number 10378 is a direct replacement for select Subaru Forester, Legacy, Outback, WRX, and Crosstrek applications.

For buyers searching for a remanufactured alternator for 2020-2022 Subaru Legacy or 2020-2022 Subaru Outback, this unit provides the correct electrical and mounting specifications for the listed vehicles. The 10378 alternator is also a fit for 2021-2022 Subaru Forester, 2022 Subaru WRX, and 2021 Subaru Crosstrek.

Key Features

• 12.0-volt alternator for standard vehicle charging systems
• Internal fan and internal voltage regulator
• Clockwise rotation
• Supplied with pulley installed
• 6-groove pulley for serpentine belt systems
• Mitsubishi family design
• Remanufactured to OE fit, form, and function standards

Product Details

MPA Electrical remanufactured alternators are produced to match original equipment dimensions and operating characteristics, then tested to help confirm proper charging output and fitment. This part number 10378 uses a Mitsubishi-style design with a 12 o’clock rear plug clock, internal regulation, and a serpentine pulley setup with six grooves. It is intended for Subaru charging system service where the original alternator has failed, is undercharging, or is producing inconsistent electrical output. This part cross-references Subaru OE numbers 23700-AB051 and 23700-AB13A for the same application.

What It Helps Fix

• Battery warning light caused by alternator failure
• Low charging voltage or intermittent charging
• Dim lights or electrical instability while driving
• Dead battery conditions related to charging system faults
• Noise or wear associated with a failing alternator assembly

Installation Notes and Tips

Verify pulley groove count, belt type, rotation direction, and connector orientation before installation. Confirm the vehicle uses a 12-volt charging system and compare the original unit to the replacement alternator to ensure the mounting ear and rear plug clock match. After installation, inspect belt condition and tension, then check charging voltage at the battery to confirm proper system operation.

Quality Assurance

This remanufactured alternator is backed by MPA Electrical’s OE-focused remanufacturing and testing process, which is used to support consistent fit and charging performance for the listed Subaru applications.