Denso Alternators

Denso - Alternator

DENSO alternators are not only original equipment on many of the world's top production cars; they are a favorite in motorsports as well, where their light weight, high efficiency, and durability under the most grueling conditions make them the natural choice. Remanufactured DENSO alternators go through a grueling process: Stators and rectifiers are tested to 300 volts, while rotors are submitted to 600 volts, all to ensure reliable performance. Rotor slip rings are buffed to an 8 micron surface finish, with run out limited to 20 microns, minimizing brush wear and abrasion. Bearings are validated to OE standards and loaded with premium OE-standard lubricants. New or remanufactured, a DENSO alternator is a quality component.


Offered in versions from 40 to 160 amperes and beyond for hundreds of specific vehicle applications, all alternators meet DENSO's rigorous First Time Fit® standards. Contemporary cars employ dozens of sophisticated electronic systems from bumper to bumper, placing heavy demands on the charging system. The alternator is no place to cut corners. DENSO First Time Fit alternators meet or exceed all manufacturer standards, mount properly with a minimum of installation issues, and provide years of reliable service.

Denso - Alternator Construction

1. Housing

Re-tapped to OE standards and damage-checked for heat warping, corrosion, or improper surface alignment.

2. Stator

Insulation tested to 600 volts.

3. Rotor

Performance and insulation tested to 600 volts.

4. Bearing

100% tested to OE standards and repacked with OEM grade lubricant.

5. Slip Ring

Re-machined to an average of 8 microns (20 micron run-out maximum).

6. Voltage Regulator

100% voltage tested to OE standards.

7. Rectifier

Performance tested to 300 volts.

8. Hardware

100% stripped and replated.

Denso - Alternator Performance Curve

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Denso - Alternator Benefits