1GR 4.0L High Output Alternator FJ & 4Runner

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 alternator designed specifically for Toyota vehicles powered by the 1GR-FE 4.0L V6 engine, including the FJ Cruiser and 4Runner models. This alternator is built to provide increased electrical power output to support additional accessories like off-road lighting, winches, sound systems, and more, ensuring your electrical system stays reliable under heavy loads.

Our high output alternator is engineered for a direct fit, offering a reliable and durable solution that maintains OEM quality and performance.

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.

Why Choose Our 1GR 4.0L High Output Alternator?

• Increased Electrical Capacity: Delivers higher amperage output to meet the demands of modern accessories.
• Direct OEM Replacement: Designed to fit perfectly without modification for straightforward installation.
• Durable Construction: Built to withstand harsh conditions and extended use.
• Reliable Power Supply: Ensures consistent voltage and prevents electrical issues, even under heavy load.
• Perfect for Off-road Builds: Ideal upgrade for vehicles equipped with numerous electrical add-ons.

FAQs about the 1GR 4.0L High Output Alternator

Will this alternator fit my FJ Cruiser or 4Runner?
Yes, it is compatible with Toyota models equipped with the 1GR-FE 4.0L engine. Please verify compatibility based on your vehicle’s year and model.

Can I install this alternator myself?
Installation typically requires basic mechanical skills and tools. Professional installation is recommended if you're not experienced.

How does this alternator differ from the stock unit?
Provides higher amperage output, supporting more accessories without compromising reliability.

Is there a warranty?
Warranty details are provided with purchase; please contact us for specifics.

Upgrade Your Vehicle’s Electrical System Today

Ensure your Toyota FJ Cruiser or 4Runner’s electrical system keeps pace with your performance upgrades using the 1GR 4.0L High Output Alternator. For questions or orders, visit our Contact Us page or call us at 1-928-505-2501.

Trust LCE Performance for quality parts tailored for your Toyota.

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.

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