A direct-fit replacement 12V 150A alternator for John Deere tractor and agricultural equipment applications. The alternator generates AC electricity as the engine runs, which is converted to DC power to charge the battery and supply the vehicle's electrical system. A failing alternator typically presents as a flat battery that will not hold charge, dimming lights under load, or complete electrical failure even with a known good battery.

Manufactured to OEM specification with internal regulator, internal fan, and clockwise rotation, cross-referencing John Deere OEM part number AL171541 for straightforward identification. Verify your model and year against the fitment table before ordering.

Key Features

• Direct OEM-specification replacement alternator 
• 12V / 150A output - clockwise rotation - internal fan - internal regulator
• Replaces John Deere OEM part numbers AL171541, AL119537, AL166647, and SE501830
• No modification required - like-for-like fitment

OE Reference Numbers

Specifications