The O2 Fabrication Battery Relocation Kit for the 2nd and 3rd Gen Toyota Tacoma is the professional solution for serious builds. By moving the battery from the front corner of the engine bay to a secure, protected position behind the rear seat, you solve multiple problems at once: you improve front-to-back weight distribution, protect your battery from heat and vibration, and free up massive amounts of space in the engine bay.

Why Relocate?

• Clear 37”+ Tires: Moving the battery is the single best way to free up the space needed for aggressive tubing and high-clearance fender mods.
• Stop the Cracks: Relocating your battery to the cabin eliminates the stress on the factory core support and battery tray, which are notorious for failing during high-speed off-road use.
• Dual Battery Ready: By clearing the factory location, you open up room for secondary batteries, large air compressors (like the ARB Twin), or custom accessory mounts.
• Optimized Center of Gravity: Moving ~60 lbs of lead-acid weight from the highest, furthest point in the front to a low, central point in the cabin significantly improves handling and nose-dive during braking.

Fabricated for Extreme Use
Each kit is designed and built in-house with a focus on structural integrity. The two-piece box (base and top) is engineered to keep the battery locked down even during a rollover or high-G impact.

What’s Included

• 1x O2 Fabrication Battery Box Base
• 1x O2 Fabrication Battery Box Top
• 5/16” Grade 8 Hardware Kit:
  • 4x 5/16” Hex Bolt
  • 8x 5/16” Flat Washer
  • 4x 5/16” Nylon Lock Nut
    

Required for Installation (Not Included)

• To complete this relocation, you will need a heavy-duty wiring kit. We recommend:
  • 23 ft of 2/0 Power Wire
  • 400A ANL Fuse & Holder
  • (4) 2/0 Ring Terminals & (2) Battery Terminals
  • Cable Glands (PG21) for a weather-tight floor passthrough
  • Heat Wrap and Bus Bars for a clean engine bay termination

Pro Tip: Moving the battery behind the seat is foundational for a balanced Tacoma build. Not only does it keeps your expensive AGM battery away from engine heat and gives you a rock-solid foundation for a high-output electrical system, but it takes a large amount of weight off of the front corner of your truck, making the suspension perform much better. Keep in mind: this is a significant project. You'll need high-quality 2/0 cable to handle the long run from the back to the starter. If you aren't comfortable with heavy-gauge wiring, our Surrey team does these installs regularly and can handle the full integration for you.