What Is a Sub Fuel Tank in a Toyota Land Cruiser?
A sub fuel tank in a Toyota Land Cruiser is an auxiliary fuel reservoir designed to increase the vehicle’s total fuel capacity. It works alongside the main fuel tank and is especially valuable for long-distance travel, overlanding, and remote-area driving where refueling options are limited.
Purpose of a Sub Fuel Tank
- Extended driving range – Provides additional fuel storage for longer trips between refueling stops.
- Emergency reserve – Offers a backup supply in case fuel stations are unavailable.
- Overland convenience – Reduces the need to carry jerry cans, freeing up cargo space.
How It Works
- Factory-installed systems – Integrated into the vehicle’s fuel management system with dash-mounted controls and indicators.
- Aftermarket setups – Can be added later, using transfer pumps or gravity-feed designs.
- Switching fuel sources – Drivers can transfer fuel from the sub tank to the main tank as needed.
Capacity & Placement
- Typical size – Ranges from 30 to 80 liters depending on model and market.
- Location – Usually mounted beneath the rear cargo area or between the chassis rails.
- Material – Made from steel, aluminum, or heavy-duty polyethylene for durability.
Benefits for Land Cruiser Owners
- Increased autonomy – Ideal for expeditions in deserts, mountains, or remote backcountry.
- Balanced weight distribution – Proper installation minimizes impact on handling.
- Peace of mind – Ensures fuel availability in unpredictable conditions.
Maintenance Tips
- Regular inspections – Check for leaks, corrosion, or damage to hoses and fittings.
- Proper operation – Understand the switching or transfer system to avoid fuel starvation.
- Compliance – Ensure modifications meet local vehicle and safety regulations.
The sub fuel tank in a Toyota Land Cruiser is a practical upgrade for those who travel far beyond urban areas. By extending range and providing a reliable backup supply, it enhances the Land Cruiser’s role as a dependable long-distance and off-road vehicle.