High Output Alternator for Jeep Wrangler (2007-2008) 3.8L

High-Output 350-Amp Alternator for 2007-2008 Jeep Wrangler (JK)

What it Does: The 350-amp high-output alternator replaces the underpowered factory unit on the 2007-2008 Jeep Wrangler to deliver stable, high-amperage 12V power for winches, secondary batteries, and high-draw overland electrical accessories.

The Stock Jeep Wrangler Electrical Bottleneck

Factory JK Wranglers equipped with the Chrysler 3.8L EGH V6 roll off the assembly line with either a 140-amp or 160-amp charging unit. When outfitted with aftermarket recovery winches drawing up to 400 amps under load, high-wattage auxiliary lighting, or onboard air compressors, the stock internal rectifier overheats, causing drastic voltage sag below 12.0V. This thermal stress breaks down the OEM copper windings, burns out the internal diode bridge, and strains the engine management computer due to erratic voltage ripple.

The Engineering Solution

Engineered to resolve charging deficits under severe trail duty, this 350-amp unit features heavy-gauge, high-temperature copper hairpin stator windings and an oversized internal heat sink equipped with avalanche-grade diodes. Precision-wound to produce substantial amperage even at low trail-crawl RPMs, the reinforced casing dissipates heat rapidly to eliminate diode failure and thermal throttling. Built as a direct bolt-on upgrade, it directly interchanges with factory unit 04727865AB and mounts to OEM bracketry without requiring modifications to the accessory drive belt routing.

What's Included

• 1 350-Amp High-Output Alternator

Technical Specifications

Compatibility

• 2007 Jeep Wrangler 3.8L V6 (JK)
• 2008 Jeep Wrangler 3.8L V6 (JK)

Frequently Asked Questions & Fitment Warnings

Does this fit the JK Wrangler?

Yes, this is a direct fit for the 2007-2008 Jeep Wrangler equipped with the 3.8L EGH V6 engine.

Do I need to upgrade my charging cables?

Yes, running a "Big 3" or 1/0 AWG fused power and ground cable upgrade is highly recommended to safely carry 350-amp loads to the battery.

The Jeep Off-Road Reliability Standard

Built for harsh trail recovery and relentless off-grid conditions, this alternator ensures consistent charging power through extended low-RPM rock crawls, water crossings, and heavy winch pulls without burning out your electrical system.