Bosch AL9445X Alternator

Bosch AL9445X Remanufactured Alternator

The Bosch AL9445X is a remanufactured 12-volt alternator built for BMW charging-system applications that demand stable output and OE-style fitment. It features a 230-amp rating, internal voltage regulation, and an included pulley for direct replacement service.

Bosch Premium Alternators are remanufactured, tested, and built to support reliable electrical performance in demanding driving conditions. The AL9445X is designed for BMW 650i, 550i, X5, X6, 750i, and related models where correct pulley, plug, and mounting configuration matter.

Key Features

• Remanufactured Bosch alternator for BMW charging systems
• 12-volt design with 230-amp output rating
• Internal regulator and internal fan design
• Clockwise rotation
• Included pulley with 7-groove belt interface
• Aluminum case and aluminum housing construction
• Plug type 430 with rear-view plug clock position at 9 o’clock
• Outside pulley diameter: 48.5 mm
• OE cross-reference for BMW part numbers 12317603779 and 12317603782

Detailed Description

Bosch AL9445X is a remanufactured alternator engineered for BMW vehicles that use a 12-volt, high-output charging system. With a 230-amp amperage rating, internal regulator, internal fan, and clockwise rotation, this unit is built to match the electrical and mechanical requirements of the original application. The included 7S pulley and 7-groove belt profile support proper belt engagement, while the aluminum case helps maintain a durable, OE-style fit. This part number is commonly searched for BMW 650i, BMW 550i, BMW X5, BMW X6, and BMW 750i applications.

This part cross-references BMW OE numbers 12317603779 and 12317603782 for the same application.

What It Helps Solve

• Battery warning lights caused by weak charging output
• Low-voltage conditions that affect starting and accessory operation
• Charging instability from a worn internal regulator or alternator wear
• Noise or belt issues related to a failing alternator pulley interface
• Electrical performance problems in BMW 650i, 550i, X5, X6, and 750i models

Installation Notes and Tips

• Verify the plug type, rear-view plug clock position, pulley style, and rotation direction before installation.
• Confirm vehicle-specific fitment for BMW 650i, 550i, X5, X6, and 750i applications using the exact model year.
• Inspect the belt, tensioner, and charging connections during alternator replacement.
• Check battery condition and charging voltage after installation to confirm system performance.

Quality Assurance

Bosch Premium Alternators are built and tested to meet the demands of OE-style replacement service. The AL9445X remanufactured alternator is produced for consistent electrical output and dependable operation in BMW charging systems.

• Fits 2015 BMW 650i, N/A
• Fits 2012 BMW 650i, N/A
• Fits 2015 BMW 650i xDrive, N/A
• Fits 2012 BMW 650i xDrive, N/A
• Fits 2008-2014 BMW X6, N/A
• Fits 2011-2013 BMW 550i, N/A
• Fits 2011-2013 BMW 550i xDrive, N/A
• Fits 2010-2013 BMW X5, N/A
• Fits 2010-2012 BMW 550i GT, N/A
• Fits 2010-2012 BMW 550i GT xDrive, N/A
• Fits 2009-2012 BMW 750i, N/A
• Fits 2010-2012 BMW 750i xDrive, N/A
• Fits 2009-2012 BMW 750Li, N/A
• Fits 2010-2012 BMW 750Li xDrive, N/A