Denso 210-1225 Alternator

Denso 210-1225 Reman Alternator Overview

The Denso 210-1225 reman alternator is a 12-volt, 150-amp charging system component built for dependable output in modern vehicles with higher electrical demand. It is a direct-fit remanufactured alternator for select Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer applications.

Denso reman alternators are rebuilt to OE-style standards with attention to rotor, stator, rectifier, bearings, and slip-ring finish for stable charging performance and reduced brush wear.

Key Features

• 12.0-volt alternator with 150 amp output
• Internal fan design for compact packaging
• Clockwise rotation
• Remanufactured to Denso OE standards
• Built for vehicles with sensitive electronic systems
• Direct-fit design for proper mounting and alignment

Product Line Details

Denso Reman Alternator units are part of the Denso OE family and are rebuilt using premium cores and OE assembly benchmarks. The remanufacturing process includes electrical testing of major internal components, precision finishing of rotor slip rings, and validation of bearings to OE standards with premium lubricants. The result is a charging component designed to meet the electrical and thermal demands of late-model vehicles.

Vehicle Fitment

• Fits 2009-2010 Ford Explorer, N/A, 150 Amp; Reman Alternator
• Fits 2009-2010 Ford Explorer Sport Trac, N/A, 150 Amp; Reman Alternator
• Fits 2009-2010 Mercury Mountaineer, N/A, 150 Amp; Reman Alternator

This part cross-references Ford 9L2T-10300-AA and 9L2Z-10346-A for the same application.

Common Problems This Alternator Can Address

• Low battery charge or repeated battery drain
• Dim headlights or fluctuating electrical output
• Battery warning light on the dash
• Charging system noise caused by worn internal components
• Voltage instability affecting vehicle electronics

Installation Notes and Quality Assurance

Verify the vehicle’s amperage requirement, connector style, pulley alignment, and mounting points before installation. This Denso 210-1225 alternator is intended for 2009-2010 Ford Explorer, 2009-2010 Ford Explorer Sport Trac, and 2009-2010 Mercury Mountaineer 150 amp applications. Professional installation and charging-system testing after installation help confirm proper operation.

Denso remanufactured alternators are tested and rebuilt to support reliable OE-level fit and performance. The brand’s reman process includes component-level electrical validation and bearing inspection to help maintain consistent charging output.