Reinforced Bottom Plate
A reinforced 5mm bottom plate improves durability and provides additional protection in uneven terrain and off-road driving conditions.
PROJECT // AUXILIARY FUEL SYSTEM
REV. 2026 / v1.1
4Runner Auxiliary Fuel Tank 30L
Auxiliary fuel system engineered to extend driving range through seamless fuel transfer while preserving factory balance, fitment, and system reliability.
TOTAL CAPACITY
184L
EST.RANGE INCREASE
620km - 710km+
PRIMARY MATERIAL
Aluminum-Magnesium Alloy
Vehicle Fitment
MODEL4Runner
YEAR2009-2023
ENGINE4.0
FUELGasoline
DATA SHEET
TECHNICAL SPECIFICATIONS
ENGINEERING DATA LOG
| MATERIAL | Aluminum-Magnesium Alloy |
|---|---|
| MOUNT POSITION | Rear Chassis |
| NET WEIGHT | 20.5KG |
| GROUND CLEARANCE | MINIMAL(＜10MM) |
| COATING | Textured Black Powder Coat |
Capacity & Range
TOTAL FUEL VOLUME
184L
Factory: 87L + Fuken: 97L
EST. RANGE INCREASE
620km - 710km+
Fuel System Logic
SYSTEM TYPE
Automatic Siphon Transfer
Premium rear-mounted auxiliary system engineered for the 2009-2023 Toyota 4Runner 4.0L. Designed to seamlessly integrate with the 87L factory tank, expanding total fuel capacity to a massive 184L. This ultra-reliable setup requires no additional mechanical pumps or manual electrical switches; fuel is automatically replenished via the factory venturi system, ensuring a codes-free, fail-safe solution for long-range overlanding.
Gauge Behavior: The factory fuel gauge will remain sustained at the "Full" position for an extended period while fuel is being automatically drawn from the 97L rear auxiliary tank. Once the auxiliary fuel is fully depleted, the gauge will begin to decline naturally to reflect the 87L primary tank's real-time level. Note that due to this massive dual-tank configuration, the vehicle’s Estimated Range (DTE) cannot be calculated with absolute precision by the ECU and should serve as a general reference only.
Structure & Protection Design
01
02
Internal Baffle System
Internal baffles help control fuel movement inside the tank, improving vehicle stability and fuel pickup reliability on uneven terrain.
03
Heat Shield Protection
Integrated heat shielding reduces exhaust heat exposure and helps protect fuel system components from excessive temperature.
04
Quick-Connect Fuel Line Fittings
Equipped with OEM-style quick-connect fittings for secure sealing, simplified installation, and reliable fuel line connections.
05
Integrated Drain Port
An integrated drain port allows fuel to be safely drained for maintenance, repairs, or long-term storage without removing the tank.
06
Direct Bolt-On Installation
Designed to mount to factory locations using original mounting points. No chassis cutting, drilling, or permanent modifications required.
07
Individual Serial Identification
Each tank is marked with a unique serial number for product identification, quality tracking, and authenticity verification.
Weight & Material Engineering
Designed to reduce weight without compromising strength, ideal for long-range and overland use.
ENGINEERING CHOICE
Fuken ALUMINUM TANK
20.5KG
- MATERIALAL 5052
- PROTECTIONNATIVE ANTI-RUST
- BEST FOROVERLANDING
TYPICAL ALTERNATIVE
TRADITIONAL STEEL
56KG
- MATERIALMILD STEEL
- COATINGEASY TO CORRODE
- IMPACTHIGH CHASSIS LOAD
TECH DOC // INSTALLATION
Installation & Technical Notes
EST. TIME
4 Hours
DIFFICULTY
100% Bolt-on
CHASSIS MOD
NONE
EXHAUST MOD
NONE
PUMP MOD
NONE
What's In The Box
97L Auxiliary Fuel Tank: Optimized for transmission-side fitment.
Mounting Hardware: Factory-compatible mounts and brackets.
Protection: Integrated heat shield for proximity components.
OEM Standards: Vehicle-specific fuel lines and fittings included.
Mounting Hardware: Factory-compatible mounts and brackets.
Protection: Integrated heat shield for proximity components.
OEM Standards: Vehicle-specific fuel lines and fittings included.
SYSTEM VARIANTS
Other Engineering Configurations
Global Shipping
Available to most countries. Professional logistics network for oversized automotive parts.
Secure Packaging
Reinforced packaging engineered for heavy-duty fuel systems and long-distance maritime transport.
Delivery Time
Estimated 25–40 days depending on destination and selected shipping method (Sea/Air/Rail).
LONG-TERM ASSURANCE
3-YEAR WARRANTY & SUPPORT
Built to support long-term ownership, not just short-term trips. We provide transparent coverage for the life of your expedition rig.
TANK BODY
3-YEAR STRUCTURE
Full structural coverage against manufacturing defects under normal off-road usage.
COMPONENTS
LIFETIME SUPPORT
Ongoing technical support and replacement parts availability for original owners.