1GR 4.0L High Output Alternator FJ, 4Runner, Tacoma, & Tundra

1GR High Output Alternator

(U.S. Models ONLY)

LC Engineering's high output alternator is the answer to all your charging issues. Running big off-road lights, killer stereo or a winch? Then this is the alternator for you, this alternator will have a small increase in amperage at idle, but they're designed to increase amperage as your RPM's increase. The alternator is a direct fit replacement for your factory alternator. This kit includes a new heavy duty, American built alternator using American made rotor and stator. This alternator comes with a one year warranty from the manufacturer.

What is the 1GR 4.0L High Output Alternator?

The 1GR 4.0L High Output Alternator is an upgraded OEM-style alternator designed specifically for Toyota vehicles equipped with the 1GR-FE 4.0L V6 engine, including the FJ Cruiser, 4Runner, Tacoma, and Tundra. This high output alternator provides increased electrical capacity to meet the demands of modern accessories, off-road lighting, winches, and audio systems without sacrificing reliability or fitment.

This alternator is precision-built to direct-fit your vehicle and ensure consistent, reliable power regardless of electrical load or driving conditions.

NOTE: The charge cable is NOT included with the alternator purchase, you will need to determine the length needed for your application and purchase the corresponding gauge recommended. Please reference the table below.

NOTE: Depending on the size of the belt you are currently running, you may need a smaller belt as the pulley on this item is smaller in diameter. It is always a good idea to replace the belt whenever introducing a new pulley into the works. Please allow a build time of one week before it will ship. We build these alternators to order. Please be sure to include year and model information when ordering this part.

Warranty Exclusions:

• Bearing failure caused by loose or over tightened belts. Alternators returned for warranty must include pulley. If pulley is shiny, shaft is blue, or pulley is blue from heat, no warranty is allowed.
• Threads stripped on the output (B+) or ground terminals (B-)
• Output (B+) (B-) terminals burnt off or discolored from loose connections
• Rotor shaft threads damaged.
• Broken brushes and/or brush holder due to attempts to re-clock alternator.
• Alternator housing damaged due to poor or loose mounting.
• Alternator hooked up or batteries installed with wrong polarity.
• Failure as a result of improper wiring (incorrect size or incorrect hook up)
• Alternator installed in non-recommended applications such as competition applications.
• Installation of an alternator that is not rated at a minimum of 30 amps above full vehicle load.
• ANY ONE, OR ALL OF THE PHASES BURNT OUT OF STATOR.
• ANY ONE, OR ALL THE DIODES BLOWN OR DAMAGED.
• Damage to the alternator due to the battery not being in the system with the engine running, or the battery cable being removed from the battery with the engine running.

Why Choose Our 1GR 4.0L High Output Alternator?

• Increased Electrical Capacity: Supports higher amperage output to power additional electrical accessories and aftermarket equipment.
• OEM Quality & Fit: Manufactured to meet Toyota’s standards, ensuring a perfect fit and hassle-free installation.
• Enhanced Durability: Built with quality components to withstand harsh driving environments and extended use.
• Direct Replacement: Designed for seamless swap with your factory alternator for an easy upgrade.
• Reliable Performance: Provides stable voltage output to keep your vehicle’s electrical system running smoothly.

1GR 4.0L High Output Alternator FAQs

Will this alternator fit my FJ Cruiser/Tacoma/4Runner/Tundra?
This alternator is compatible with Toyota vehicles equipped with the 1GR-FE 4.0L engine. Check your vehicle's specifications or contact us to confirm fitment.

Can I install this alternator myself?
Yes, if you have basic mechanical skills and tools. We recommend professional installation to ensure proper performance and safety.

How does this differ from my stock alternator?
This alternator delivers higher output amperage, ideal for vehicles with multiple electrical accessories that demand more power.

Is there a warranty?
Warranty information varies; please refer to product details or contact us for specifics.

Get the Power Your Toyota Deserves

If you’re upgrading your 1GR-FE engine vehicle with added electrical demands, the high output alternator is a must-have for consistent power delivery. For questions or to order, visit our Contact Us page or call 1-928-505-2501.

Trust LCE Performance for quality components tailored for your Toyota.

Contact our Tech Support Line for further information at 928-505-2501.