MPA Electrical 10303 Alternator

Remanufactured Alternator for Mercedes-Benz and INFINITI

MPA Electrical Part Number 10303 is a remanufactured 12-volt alternator built for charging-system replacement on select Mercedes-Benz and INFINITI vehicles. It delivers 150 amps and uses an internal regulator, internal fan, and a 5-groove serpentine decoupling pulley for the specified OE-style application.

This remanufactured MPA Electrical alternator is sourced from Bosch manufacturing specifications and is intended for drivers needing a direct-fit charging solution for Mercedes-Benz GLA250, CLA250, B250, and INFINITI QX30 applications. Part number 10303 is also referenced by OE-style interchange numbers for the same application.

Key Features

• 150 amp output for vehicle charging demand
• 12-volt electrical system application
• Internal regulator for integrated voltage control
• Internal fan design for alternator cooling
• 5-groove serpentine decoupling pulley
• Clockwise rotation
• Clock position: 12:00
• Remanufactured by MPA Electrical

Detailed Description

MPA Electrical 10303 is a remanufactured alternator for 2014-2020 Mercedes-Benz and INFINITI platforms that require a Bosch-style charging unit with a 150 amp rating. It is listed for 2015-2020 Mercedes-Benz GLA250, 2014-2019 Mercedes-Benz CLA250, 2015-2019 Mercedes-Benz B250, and 2017-2019 INFINITI QX30. The combination of an internal regulator, internal fan, and serpentine decoupling pulley supports the OE configuration used on these vehicles.

Part number 10303 is a practical replacement choice when the original alternator no longer maintains proper charging output. This unit cross-references Bosch-style OE numbers 0-125-711-030 and 000-906-19-03 for the same application.

Common Issues This Part Can Address

• Battery warning light caused by alternator charging failure
• Low system voltage during driving or idle
• Dim lights or electrical instability from weak charging output
• Battery drain symptoms related to alternator malfunction
• Noise or pulley-related charging system concerns on the original unit

Installation Notes and Tips

Verify pulley style, rotation, amperage, and connector match before installation. Confirm fitment by year, make, and model for Mercedes-Benz GLA250, CLA250, and B250, as well as INFINITI QX30 applications. Inspect the battery, belt condition, and charging circuit before installing the replacement alternator to help avoid repeat failures.

Quality Assurance

MPA Electrical remanufactured components are rebuilt for charging-system replacement using Bosch-based specifications for the listed applications. Part number 10303 is built for the confirmed vehicle fitments shown above.