New aftermarket 12-volt, 120-amp alternator for select 1990–1993 Dodge D/W Series pickups equipped with the 5.9L Cummins diesel engine. Common applications include Dodge D250, D350, W250, and W350 models. This alternator uses an external voltage regulator and replaces common numbers including 121000-4080, 121000-4150, 121000-4151, 400-52006, 5234374, 56027221, AL6510N, and AL6510X. Before ordering, confirm the original alternator number and compare the electrical connections, mounting configuration, pulley, voltage, amperage, and regulator type with the listing photos. Fitment should be verified by engine and original part number rather than vehicle model alone.
12V 120A ALTERNATOR: New aftermarket alternator for select Dodge 5.9L Cummins diesel pickups. Features 120-amp output and an externally regulated charging-system design.
DODGE TRUCK FITMENT: Fits select 1990–1993 Dodge D250, D350, W250, and W350 pickups equipped with the 5.9L inline-six diesel engine.
REPLACEMENT NUMBERS: Replaces Denso 121000-4080, 121000-4150, and 121000-4151; Chrysler 5234374 and 56027221; Bosch AL6510N and AL6510X.
EXTERNAL REGULATOR DESIGN: This alternator uses the vehicle’s external voltage regulator. It is not interchangeable with internally regulated alternators, even when the mounting style appears similar.
VERIFY BEFORE ORDERING: Compare the original part number, electrical terminals, mounting ears, pulley, regulator type, voltage, and amperage with the product photos. Different alternators may have been used depending on production date and previous repairs.
