1UR 4.6L /3UR 5.7L High Output Alternator Sequoia & Tundra

1UR & 3UR 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 1UR 4.6L & 3UR 5.7L High Output Alternator?

The 1UR 4.6L & 3UR 5.7L High Output Alternator is a performance upgrade alternator tailored for Toyota Sequoia and Tundra models equipped with the 1UR-FE 4.6L V8 or the 3UR-FE 5.7L V8 engines. Designed to meet the increased electrical demands of modern vehicles equipped with additional accessories such as off-road lighting systems, winches, advanced audio setups, and other electronic devices, this alternator delivers high amperage output while maintaining OEM-level reliability.

Manufactured to meet strict OEM specifications, this alternator provides a direct-fit replacement and ensures consistent power supply under demanding 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.

Why Choose the 1UR & 3UR High Output Alternator?

• Enhanced Electrical Capacity: Supports multiple high-draw electrical devices without compromising performance.
• OEM Quality & Compatibility: Direct replacement alternator designed for perfect fit and easy installation.
• Durability: Built with premium materials to withstand tough vehicle operating conditions.
• Consistent Power Delivery: Maintains stable voltage output to protect and support your vehicle’s electrical system.
• Ideal for Upgraded Vehicles: Perfect for Sequoias and Tundras loaded with aftermarket electronics and accessories.

Frequently Asked Questions

Will this alternator fit my Toyota Sequoia or Tundra?
Yes, it fits models equipped with 1UR-FE 4.6L and 3UR-FE 5.7L engines. Verify your vehicle’s engine for compatibility.

Can I install this alternator myself?
Basic mechanical skills and tools are required for installation, but professional installation is recommended for best results.

How is this alternator different from the stock unit?
Provides a higher amperage output to reliably power additional electrical accessories.

Is there a warranty with this alternator?
Warranty details are available on the product page or by contacting our support team.

Upgrade Your Toyota’s Electrical System Today

Enhance the electrical capability of your Toyota Sequoia or Tundra by upgrading to the 1UR 4.6L & 3UR 5.7L High Output Alternator from LCE Performance. For inquiries or orders, please visit our Contact Us page or call 1-928-505-2501.

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.