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
LX600 AUXILIARY FUEL TANK
Auxiliary fuel system engineered to extend driving range through seamless fuel transfer while preserving factory balance, fitment, and system reliability.
TOTAL CAPACITY
134L
EST.RANGE INCREASE
380km - 450km+
PRIMARY MATERIAL
Aluminum-Magnesium Alloy
Vehicle Fitment
MODELLX600
YEAR2024+
ENGINE3.5TT
FUELGasoline
DATA SHEET
TECHNICAL SPECIFICATIONS
ENGINEERING DATA LOG
| MATERIAL | Aluminum-Magnesium Alloy |
|---|---|
| MOUNT POSITION | Chassis Side Mount |
| NET WEIGHT | 13.6KG |
| GROUND CLEARANCE | NO LOSS- HIGH CLEARANCE |
| COATING | Textured Black Powder Coat |
Capacity & Range
TOTAL FUEL VOLUME
134L
Factory: 80L + Fuken: 54L
EST. RANGE INCREASE
380km - 450km+
Fuel System Logic
SYSTEM TYPE
Automatic Siphon Transfer
Non-destructive auxiliary system precision-engineered for the 2024+ Lexus LX600 3.5TT. It seamlessly integrates mechanically with the 80L OEM primary tank, requiring no additional mechanical pumps or manual electronic switches. Fuel is automatically and safely replenished via the factory venturi system, preserving the structural integrity and mechanical stability of your original fuel delivery setup for premium luxury touring.
Gauge Behavior: The factory fuel gauge will remain securely at the "Full" position while fuel is actively being drawn and replenished from the 54L auxiliary tank. Once the auxiliary fuel is fully depleted, the gauge will begin to decline naturally, reflecting the 80L primary tank's real-time level. Due to this dual-tank configuration altering original fuel storage profiles, the vehicle’s Estimated Range (DTE) cannot be precisely calculated, and a temporary fuel-level related diagnostic code may occasionally trigger (please refer to the Factory Electronics Notice).
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
Strap Shield Protection System
Recessed mounting pockets allow the tank straps to sit flush within protected zones, reducing the risk of strap damage or snagging when sliding over obstacles off-road.
05
Quick-Connect Fuel Line Fittings
Equipped with OEM-style quick-connect fittings for secure sealing, simplified installation, and reliable fuel line connections.
06
Integrated Drain Port
An integrated drain port allows fuel to be safely drained for maintenance, repairs, or long-term storage without removing the tank.
07
Direct Bolt-On Installation
Designed to mount to factory locations using original mounting points. No chassis cutting, drilling, or permanent modifications required.
08
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
13.6KG
- MATERIALAL 5052
- PROTECTIONNATIVE ANTI-RUST
- BEST FOROVERLANDING
TYPICAL ALTERNATIVE
TRADITIONAL STEEL
36KG
- 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
FACTORY ELECTRONICS NOTICE
The Lexus LX600 utilizes a highly sensitive fuel level monitoring strategy within the factory ECU.
Because an auxiliary fuel tank alters the vehicle's original fuel storage characteristics, the factory monitoring system may occasionally register a fuel level-related diagnostic trouble code (such as P0460, P0461, or similar fuel level sensor performance codes).
This condition does not affect:
• Fuel system functionality
• Engine operation or performance
• Vehicle safety
• Auxiliary fuel tank operation or fuel transfer performance
If present, the code may be cleared using standard diagnostic equipment. Depending on vehicle operating conditions, the code may return periodically as part of the vehicle's fuel level monitoring strategy.
This behavior is a known characteristic of the Lexus LX600 fuel monitoring system when used with an auxiliary fuel tank and should not be considered a defect in the auxiliary fuel tank product.
Because an auxiliary fuel tank alters the vehicle's original fuel storage characteristics, the factory monitoring system may occasionally register a fuel level-related diagnostic trouble code (such as P0460, P0461, or similar fuel level sensor performance codes).
This condition does not affect:
• Fuel system functionality
• Engine operation or performance
• Vehicle safety
• Auxiliary fuel tank operation or fuel transfer performance
If present, the code may be cleared using standard diagnostic equipment. Depending on vehicle operating conditions, the code may return periodically as part of the vehicle's fuel level monitoring strategy.
This behavior is a known characteristic of the Lexus LX600 fuel monitoring system when used with an auxiliary fuel tank and should not be considered a defect in the auxiliary fuel tank product.
What's In The Box
54L 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.
Installation Video Guide
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.