Denso 210-4227 Alternator

Denso 210-4227 Reman Alternator Overview

The Denso 210-4227 reman alternator is a 12-volt, 90-amp charging component built for Subaru and Saab applications that require OE-style fit and stable electrical output. It is a remanufactured Mitsubishi OE-family alternator with an internal fan, internal regulator, and clockwise rotation.

Compatible With 2004-2010 Subaru Impreza, 2006-2010 Subaru Forester, and 2006 Saab 9-2X. This part number, 210-4227, is selected for vehicles with modern electrical loads and sensitive onboard electronics.

Key Features

• 12.0-volt alternator with 90 amp output
• Internal fan and internal voltage regulator
• Clockwise rotation
• Remanufactured to OE assembly benchmarks
• Built for consistent charging performance in demanding electrical systems
• First Time Fit design for proper mounting and alignment

Product Line Details

Denso reman alternators are rebuilt using premium cores and OE-level validation steps. Critical components such as stators, rectifiers, rotors, slip rings, and bearings are inspected and tested to help maintain reliable charging output and reduce premature wear. The 210-4227 follows Denso First Time Fit standards for applications where correct mounting and electrical compatibility matter.

This part cross-references Bosch AL4310X and Remy 12603 for the same application.

Vehicle Fitment

• Fits 2006-2010 Subaru Forester, N/A, 90 Amp Alternator; Reman Alternator
• Fits 2004-2010 Subaru Impreza, N/A, 90 Amp Alternator; Reman Alternator
• Fits 2006 Saab 9-2X, N/A, OE Equivalent; Alternator - Reman

What It Helps Address

• Battery warning light caused by weak alternator output
• Low charging voltage during driving or idle
• Electrical instability in vehicles with multiple onboard systems
• Noise or wear related to aging alternator bearings
• Poor belt alignment from a worn or incorrect replacement unit

Installation Notes

Verify the vehicle’s original alternator specifications before installation, including amperage, rotation direction, regulator type, and connector style. Confirm belt and pulley alignment during replacement, and inspect the charging system wiring, battery condition, and drive belt before returning the vehicle to service. The 210-4227 is intended for direct-fit applications listed above.

Quality Assurance

Denso reman alternators are tested to OE standards, including high-voltage validation of internal electrical components and inspection of rotor slip-ring finish and bearing quality. The result is a remanufactured charging unit built to support reliable operation in Subaru Forester, Subaru Impreza, and Saab 9-2X applications.