What does this alternator adapter harness do?

This adapter harness lets you use a Toyota Sequoia or Tundra 2UZ-FE alternator in place of the stock 2JZ or 1UZ alternator. The Sequoia/Tundra alternator has a different connector than the stock 2JZ or 1UZ unit, so this adapter bridges the two without any cutting or splicing.

Why would I want to use a Sequoia or Tundra 2UZ alternator on my 2JZ or 1UZ build?

The Toyota Sequoia and Tundra 2UZ-FE alternators are widely available, inexpensive at junkyards, and physically compatible with 2JZ and 1UZ swap builds. They output significantly more amperage than the stock units, making them ideal for builds running high-powered fuel pumps, electric fans, stereos, or other electrical accessories.

Is this a plug-and-play installation?

Yes. The adapter plugs directly into the stock 2JZ or 1UZ alternator connector on one end and the Sequoia/Tundra 2UZ alternator on the other. No cutting, no splicing, and no modification to your existing wiring harness.

Which vehicles and builds is this compatible with?

This adapter is compatible with any build using the 2JZ-GTE, 2JZ-GE, or 1UZ-FE alternator wiring connector, including MK4 Supra (JZA80), MK3 Supra (MA70), Lexus SC300, SC400, IS300, GS300, and custom engine swap builds using these engines.

SVK Works Sequoia Tundra 2UZ alternator adapter harness for 2JZ and 1UZ swap

In Stock

Sequoia / Tundra 2UZ Alternator Adapter Harness for 2JZ & 1UZ

Plugs into the stock 2JZ-GTE or 1UZ-FE alternator connector

$25.00

Run the high-output Toyota Sequoia or Tundra 2UZ-FE alternator in your 2JZ or 1UZ build without touching a single wire in your existing harness. This plug-and-play adapter bridges the connector difference between the Sequoia/Tundra alternator and the stock 2JZ-GTE or 1UZ-FE alternator pigtail — no cutting, no splicing, no headaches.

The Sequoia and Tundra 2UZ alternators are a popular upgrade in the Toyota/Lexus swap community because they are junkyard-cheap, physically compatible, and put out significantly more amperage than the stock unit — making them ideal for builds running big fuel pumps, twin fans, audio systems, or any serious electrical load.

Plug-and-play — no cutting or splicing
Connects Sequoia / Tundra 2UZ-FE alternator to stock 2JZ or 1UZ connector
OEM-quality terminals and weatherproof connectors
Properly rated wire gauge for high-output alternator use
Compatible with 2JZ-GTE, 2JZ-GE, and 1UZ-FE alternator connectors
Hand-assembled and tested at SVK Works

Compatibility

Alternator Side	Toyota Sequoia / Tundra 2UZ-FE
Harness Side	Stock 2JZ-GTE / 2JZ-GE / 1UZ-FE connector
Vehicles	MK4 Supra (JZA80), MK3 Supra (MA70), SC300, SC400, IS300, GS300, and 2JZ / 1UZ swap builds
Alternator Source	Toyota Sequoia 2001–2007, Toyota Tundra 2000–2006 (2UZ-FE)
Installation	Plug-and-play, no modification required

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Why Upgrade

More Amperage. Same Wiring.

The factory 2JZ and 1UZ alternators were sized for stock electrical loads. If you're running a high-pressure fuel pump, twin electric fans, a bigger stereo, or any meaningful aftermarket electrical load, a Sequoia or Tundra 2UZ alternator is a proven, budget-friendly upgrade. It physically fits, makes more power, and costs next to nothing at the junkyard. This adapter is the only missing piece.

FAQ

Common Questions

The Sequoia and Tundra 2UZ-FE alternators use a different connector than the stock 2JZ or 1UZ alternator. This adapter bridges that difference — one end plugs into your existing alternator pigtail, the other plugs into the Sequoia/Tundra unit. No wiring modification needed on either end.

The Sequoia and Tundra 2UZ-FE alternators are widely available at salvage yards for very little money, and they are physically compatible with 2JZ and 1UZ engine bays. They produce a higher amperage output than the stock alternators, making them a popular choice for builds running higher electrical demands — twin fans, big fuel pumps, stereo systems, and similar accessories.

Yes — this is a true plug-and-play adapter. Plug one end into your stock 2JZ or 1UZ alternator pigtail, plug the other end into the Sequoia/Tundra alternator, and you're done. No cutting, no splicing, and no modification to your factory harness.

This adapter is designed for the 2UZ-FE alternator used in the Toyota Sequoia (2001–2007) and Toyota Tundra (2000–2006). These are the first-generation Sequoia and first/second-generation Tundra models equipped with the 4.7L V8 2UZ-FE engine.

Any build using the 2JZ-GTE, 2JZ-GE, or 1UZ-FE alternator connector — including MK4 Supra (JZA80), MK3 Supra (MA70), Lexus SC300, SC400, IS300, GS300, LS400, and any other custom swap using these engines. If your build already uses 2JZ or 1UZ alternator wiring, this adapter will work.

Click "Add to Cart" above to order directly. Have a question about fitment? Contact us and we'll confirm compatibility for your specific build before it ships.