MPA Electrical 10321 Alternator

Remanufactured Alternator for Honda Civic and HR-V

MPA Electrical Part Number 10321 is a remanufactured 12-volt alternator built for select Honda Civic and Honda HR-V applications. It features a 135-amp output, internal regulator, internal fan, and a 7-groove serpentine decoupling pulley for OE-style charging system service.

Compatible With 2016-2024 Honda Civic and 2023-2026 Honda HR-V, this remanufactured alternator is a direct-fit electrical replacement for vehicles using the specified Nippondenso-style configuration. Part number 10321 is also a useful reference when searching for Honda Civic alternator replacement or Honda HR-V charging system repair parts.

Key Features

• 135 amps of charging output
• 12-volt electrical system application
• Internal voltage regulator
• Internal cooling fan
• 7-groove serpentine decoupling pulley
• Clockwise rotation
• Clock position: 3:00
• Remanufactured by MPA Electrical
• Manufacturer style: Nippondenso

Product Details

MPA Electrical 10321 is a remanufactured alternator intended for vehicles that require a Nippondenso-type charging unit with a 7-groove serpentine decoupling pulley. The 135-amp rating supports stable electrical output for modern Honda Civic and Honda HR-V charging demands, while the internal regulator helps maintain system voltage within the vehicle’s charging circuit. The clockwise rotation and 3:00 clock position are important match points when verifying replacement fitment.

This part cross-references 31100-5BA-A01 and 104211-3910 for the same application.

Common Charging System Issues It May Address

• Battery warning light illuminated on the dash
• Low charging voltage or intermittent charging output
• Dim lights or electrical accessories losing power
• Battery repeatedly discharging after normal driving
• Noise or wear related to alternator pulley operation

Installation Notes and Tips

• Verify the original alternator matches the 3:00 clock position, clockwise rotation, and 7-groove serpentine decoupling pulley.
• Confirm the vehicle uses a 12-volt system and the correct Nippondenso-style mounting configuration before installation.
• Inspect the drive belt, belt tension, battery condition, and charging cables during replacement.
• Clear any charging-system fault codes after installation and test charging voltage at idle and under load.

Quality Assurance

MPA Electrical remanufactured parts are rebuilt for replacement use in the specified Honda Civic and Honda HR-V applications. Part number 10321 is listed with defined electrical and mounting specifications to support accurate fitment selection.