Bosch AL9407X Alternator

Bosch AL9407X Remanufactured Alternator

The Bosch AL9407X is a remanufactured 12-volt alternator built for charging-system performance and dependable electrical output. It is a direct-fit replacement for select BMW applications, including 2001-2006 BMW M3 and 2002 BMW Z3 models with a 120 amp alternator.

Key Features

• Remanufactured Bosch alternator for 12-volt charging systems
• 120 amp amperage rating for OE-style electrical output
• Internal fan and internal regulator design
• Clockwise rotation
• 6-groove pulley with pulley included
• Aluminum case and aluminum case material
• External fan included and external regulator included as listed
• Plug type 335 with rear-view plug clock position at 6 o’clock

Product Details

Bosch Premium Alternators are remanufactured, built, and tested to support consistent charging performance and reliability. The AL9407X uses a 6S pulley type with a 57 mm outside pulley diameter and is packaged in a box for service replacement use. This Bosch alternator is a strong match for BMW charging-system service where the original unit has worn brushes, weak output, or unstable voltage regulation. It cross-references BMW 12317831436 for the same application.

Compatible With 2001-2006 BMW M3 and 2002 BMW Z3, this Bosch AL9407X alternator is a practical OE-style replacement for vehicles requiring a 120 amp remanufactured alternator. Search terms such as BMW M3 alternator replacement, BMW Z3 120 amp alternator, and Bosch AL9407X remanufactured alternator all point to this application.

What It Helps Address

• Battery warning light caused by low alternator output
• Dim lights or fluctuating electrical performance
• Battery drain from an alternator that is not charging correctly
• Charging-system noise or instability from a worn unit
• Starting issues related to insufficient system voltage

Installation Notes

Verify pulley style, connector type, rotation direction, and mounting-ear orientation before installation. This unit uses a clockwise rotation, internal fan, internal regulator, and plug type 335 with the rear-view main mounting ear at 6 o’clock. Confirm vehicle-specific charging-system requirements on the BMW M3 or BMW Z3 before replacing the original alternator.

Quality Assurance

Bosch remanufactured alternators are built and tested to meet charging-system performance expectations for service replacement. The AL9407X is remanufactured and supplied as a Bosch electrical component for select BMW applications.