High Output Alternator for Dodge Ram 2500 Ram 3500 (2007-2009) 6.7L

High-Amp 350A Alternator for 2007-2009 Dodge Ram 2500, Ram 3500 (DH/D1)

What it Does: The 350-amp High Output Alternator replaces the factory unit on the 2007-2009 Dodge Ram 2500 and Ram 3500 to deliver stable, high-capacity 12V power under heavy electrical loads and eliminate idle voltage drop.

The Stock Dodge Ram 2500, Ram 3500 Low-Idle Amperage Deficit

Factory 136-amp and 160-amp alternators on the ISB 6.7 Cummins diesel struggle once aftermarket accessories are introduced. Heavy draw from intake grid heaters, hydraulic snow plows, winches, auxiliary work lights, and trailer brake controllers causes severe voltage drops at idle. Sustained electrical overload leads to diode heat soak, thermal regulator failure, and chronic undercharging of dual-battery banks, throwing low-voltage fault codes across sensitive chassis modules.

The Engineering Solution

Engineered as a direct bolt-on for the DH/D1 heavy-duty chassis, this 350-amp unit utilizes dense heavy-gauge copper stator windings and an optimized rotor assembly to significantly boost idle and cruising current output. A heavy-duty internal voltage regulator and high-temp rectifier diodes dissipate heat efficiently under continuous peak duty. Featuring precision-balanced internals and double-sealed bearings, this alternator integrates seamlessly with the factory serpentine drive belt, OEM mounting brackets, and factory plug connections.

What's Included

• 1x 350-Amp High Output Alternator with Internal Regulator (Part #11239)

Technical Specifications

Compatibility

• 2007-2009 Dodge Ram 2500 6.7L Cummins Turbo Diesel
• 2007-2009 Dodge Ram 3500 6.7L Cummins Turbo Diesel

Frequently Asked Questions & Fitment Warnings

Does this fit the DH/D1 Ram 2500, Ram 3500?

Yes, this is a direct fit for the 2007-2009 Dodge Ram 2500 and Ram 3500 equipped with the ISB 6.7 diesel engine; it does not fit 5.9L Cummins diesel or 5.7L Hemi gas models.

Do I need to upgrade my factory wiring harness with this alternator?

While this alternator utilizes the factory plug and mounting points, upgrading the primary B+ charging lead and chassis ground to 1/0 AWG cabling is strongly recommended to handle 350-amp continuous current safely.

The Dodge Heavy-Duty Standard

Built to handle rigorous commercial hauling, recovery duty, and demanding fifth-wheel towing, this unit ensures your dual-battery Cummins electrical architecture delivers consistent 14-volt baseline power in demanding operational environments.