Toyota Accessory Fuse Box Insert Kit

Power up your Toyota with the Mil-Spec Designs Fuse Box Insert Kit. Crafted from Markforged Onyx, this kit offers superior strength, heat resistance, and durability—perfect for off-road builds or daily use. Designed for seamless integration, it supports mini fuses and micro/ultra-micro relays, ideal for powering accessories like LED lights, fridges or audio systems with a clean, reliable setup.

• Compatibility: Select Toyota models
• Material: Markforged Onyx—lightweight, tough, and heat resistant PA-CF
• Features: Mini fuse compatible, micro/ultra-micro relay ready, easy plug-and-play install
• Benefits: Long-lasting performance, streamlined power management

Kit Types:

Relay base and terminals: A single relay insert and terminals are supplied, perfect if your looking to use the existing fuse block with the addition of micro/ultra micro relays.

Relay + fuse block and terminals: Both inserts are supplied, this works best if your looking to upgrade from the existing fuse block, to a higher power supply with our 10-1 splitter supply cable!

Both inserts, terminals and crimp tool: The addition of the terminal specific crimp tool makes wiring and install much easier.

Recommended Pairing: Maximize efficiency with our 10-1 Splitter Supply Cable (sold separately). This combo simplifies wiring and ensures optimal power distribution for multiple accessories.

Upgrade your vehicle with this rugged, precision-engineered fuse box insert—built for any challenge.