Bosch AL9357X Alternator

Bosch AL9357X Remanufactured Alternator

The Bosch AL9357X is a remanufactured 12-volt alternator built for BMW charging-system applications that require 180 amps of output. It is designed for direct replacement use on select BMW 550i, 650i, 750i, 750Li, X5, 545i, 645Ci, 745i, and 745Li models.

Bosch Premium Alternators are built and tested for consistent electrical performance and dependable operation. The AL9357X uses an internal fan, internal regulator, clockwise rotation, and a 6-groove pulley setup to match the specified OE-style configuration.

Key Features

• Remanufactured Bosch alternator for 12-volt charging systems
• 180-amp amperage rating for BMW electrical system demands
• Internal fan and internal regulator design
• Clockwise rotation with 6-groove pulley
• Aluminum case and aluminum case material for OE-style fitment
• Includes pulley and external fan
• Plug type 430 with rear-view plug clocking at 6 o’clock
• Previously cataloged as AL9423X

Detailed Description

The Bosch AL9357X alternator is a remanufactured charging component for BMW vehicles that need a 180-amp replacement unit with the correct pulley, plug type, and mounting configuration. It cross-references Bosch AL9423X and is also associated with OE part numbers 12317537959, 12317540990, 12317540992, 12317540994, and 12317542935 for the same application. This part is commonly selected for BMW 550i, BMW 650i, and BMW X5 charging-system service where the original alternator has failed or output has dropped.

What It Helps Address

• Battery warning lights caused by alternator output loss
• Low-voltage charging problems during driving
• Dim lights or unstable electrical performance
• Starting issues related to insufficient system charging
• Noise or wear associated with a failing alternator assembly

Installation Notes and Tips

Verify plug type 430, pulley type 6S, 6-groove belt alignment, and clockwise rotation before installation. Confirm the vehicle’s original alternator configuration matches the rear-view plug clocking at 6 o’clock and the specified mounting-ear orientation. This alternator is listed for Fits 2006-2010 BMW 550i, N/A; Fits 2006-2010 BMW 650i, N/A; Fits 2006-2008 BMW 750i, N/A; Fits 2006-2008 BMW 750Li, N/A; Fits 2004-2006 BMW X5, N/A; Fits 2004-2005 BMW 545i, N/A; Fits 2004-2005 BMW 645Ci, N/A; Fits 2005 BMW 745i, N/A; Fits 2002 BMW 745i, N/A; Fits 2005 BMW 745Li, N/A; Fits 2004 BMW 745i, N/A; Fits 2004 BMW 745Li, N/A; Fits 2003 BMW 745i, N/A.

Quality Assurance

Bosch Premium Alternators are engineered, assembled, and tested to meet charging-system performance and reliability requirements for remanufactured replacement use.