High Output Alternator for Jeep Commander Grand Cherokee Liberty (2007-2010) 3.7L

High-Output 250-Amp Alternator for 2007-2010 Jeep Commander, Grand Cherokee, Liberty (XK / WK / KK)

What it Does: The 250-Amp High Output Alternator replaces the factory charging unit on 2007-2010 Jeep 3.7L models to deliver consistent, heavy-duty electrical current for demanding accessories and severe operating conditions.

The Stock Jeep Charging Limitations

Factory charging systems on the XK, WK, and KK platforms utilize stock 136-amp or 160-amp alternators engineered solely for baseline electronics. When off-road gear such as high-draw recovery winches, auxiliary LED light bars, overland refrigeration, or aftermarket audio systems are introduced, the factory unit experiences critical voltage sag at idle. Sustained high loads cause thermal saturation in the OEM diodes, accelerating brush wear and causing premature rectifier breakdown under high underhood ambient temperatures.

The Engineering Solution

Engineered and assembled in the USA, this direct-replacement 250-amp unit utilizes dense, precision-wound copper stators and low-resistance heavy-gauge rotor windings. High-amperage internal avalanche diodes and a heavy-duty bridge rectifier efficiently dissipate thermal loads, maintaining high-current delivery even at low engine RPM. This unit drops directly into the OEM mounting brackets and matches factory serpentine belt alignment, directly replacing part numbers AL6472X and 56029914AD without bracket modification.

What's Included

• 1 x 250-Amp High-Output Alternator

Technical Specifications

Compatibility

• 2007-2010 Jeep Commander 3.7L
• 2007-2010 Jeep Grand Cherokee 3.7L
• 2007-2010 Jeep Liberty 3.7L

Frequently Asked Questions & Fitment Warnings

Does this fit the XK / WK / KK Commander, Grand Cherokee, Liberty?

Yes, this is a direct fit for the 2007-2010 Jeep Commander, Grand Cherokee, and Liberty equipped with the EKG 3.7L PowerTech V6 engine; it does not fit 4.7L or 5.7L V8 variants.

Do I need to upgrade my battery charging wiring when installing this unit?

A 1/0 AWG Big-3 charging cable upgrade is strongly recommended to safely transmit the full 250-amp continuous current to your battery system without harness resistance or voltage drop.

The Jeep Standard

Built to endure the heavy electrical draw of off-grid trail runs and steep recovery winching, this alternator provides uninterrupted power reliability under rigorous overland and towing conditions.