High Output Alternator for Ford Explorer (1991-2000) 4.0L

Heavy-Duty 250-Amp High Output Alternator for 1991-2000 Ford Explorer (UN46/UN105)

What it Does: The High Output Alternator replaces the low-output factory charging unit on the 1991-2000 Ford Explorer to eliminate voltage sag, power auxiliary accessories, and deliver stable 250-amp electrical capacity at idle and operating RPM.

The Stock Ford Explorer Electrical Bottleneck

Factory UN46 and UN105 platforms equipped with the 4.0L Cologne V6 shipped from the factory with standard 95-amp to 130-amp alternators. While sufficient for baseline factory electronics, these units suffer from excessive heat soak, stator breakdown, and severe voltage drop when burdened with modern electrical demands such as winches, auxiliary off-road lighting, high-draw audio amplifiers, or dual-battery setups. At idle speeds, factory units drop output drastically, causing dimming lights, low battery charge rates, and accelerated wear on your ignition system.

The Engineering Solution

Engineered and manufactured in the USA, this 250-amp direct-mount unit resolves critical charging deficits using heavy-duty copper windings, high-temperature internal rectifiers, and upgraded avalanche diodes capable of managing heavy current surges. Designed to dissipate heat faster than the original casing, it maintains stable 14.4-volt delivery under continuous accessory loads. It directly replaces factory numbers including F07F-10300-AA, AL598X, and 7750 without bracket modifications.

What's Included

• 1x 250-Amp High Output Alternator

Technical Specifications

Compatibility

• 1991-2000 Ford Explorer (XL, XLT, Eddie Bauer, Limited, Sport) equipped with the 4.0L V6

Frequently Asked Questions & Fitment Warnings

Does this fit the UN46/UN105 Explorer?

Yes, this is a direct fit for the 1991-2000 Ford Explorer equipped with the 4.0L Cologne V6 engine. Does not fit 5.0L V8 models.

Do I need to upgrade my factory charging wiring?

Due to the increased 250-amp output, upgrading your primary charging lead, engine ground, and chassis ground to 1/0 or 2-gauge wire (Big 3 upgrade) is mandatory to prevent terminal overheating and ensure full current transfer.

The Ford Truck Caliber

Built for trail recovery, towing equipment, and demanding utility use, this unit provides the steady current reserve required to keep your Explorer reliable in the field.