Toyota 4Runner Upfitter Harness - 2025-2026 Toyota 4Runner

The 2025 Toyota 4Runner Upfitter Harness by Baja Designs is a vehicle-specific wiring solution designed to make adding auxiliary lighting to your 4Runner clean, reliable, and straightforward. Rather than splicing into existing wiring or running generic harnesses that weren't built with your specific truck in mind, this harness integrates directly with the 4Runner's electrical system for a factory-quality result.

For overlanders, trail runners, and weekend adventurers who want to add driving lights, light bars, or pod lights to their 4Runner without a rats nest behind the dash, this harness eliminates the guesswork. Every connection point is engineered for your truck's architecture, reducing the risk of blown fuses, voltage drops, or flickering that can come from one-size-fits-all wiring setups.

The included vehicle-specific mounting bracket means you're not improvising hardware or sourcing additional parts — everything you need for a solid, professional installation arrives together. Whether you're equipping your 4Runner for remote camping, search and rescue duty, or simply want dependable lighting on dark back roads, this harness gives your light setup the foundation it needs to perform consistently trip after trip.