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Key Features
- 18.5-gallon auxiliary long range fuel tank
- Mounts beneath the middle of the vehicle without requiring modifications
- Uses a transfer pump system to move fuel into the main tank
- Includes dash-mounted LED gauge, switch, and buzzer unit
- Raises total fuel capacity to 39.9 gallons with the factory 21.4-gallon main tank
What's in the Box
- Auxiliary fuel tank
- Transfer fuel pump system
- LED gauge, switch, and buzzer unit
- Installation parts and hardware
Important Fitment Notes
- PETROL ONLY
- 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025: Jeep Wrangler JL Unlimited – All trims and editions.
- MODIFICATIONS: NONE REQUIRED
- Confident of fitment with lift kits, air-bags and GVM upgrades
- Confident of fitment with most aftermarket exhausts that follow standard exhaust route
Description
This Brown Davis 18.5 Gal Auxiliary Long Range Fuel Tank for 2018-2026 Jeep Wrangler JL adds auxiliary fuel capacity for longer trips, towing, and remote travel. It mounts beneath the middle of the vehicle and transfers fuel to the factory tank through a dash-controlled pump system.
An LED gauge shows the auxiliary tank level at all times, and the supplied buzzer alerts the driver when the tank is empty so the pump can be switched off. The system is designed to increase total fuel capacity to 39.9 gallons while retaining ground clearance and off-road capability.
Item # JWJLA2
Specifications
| Tank Type | Auxiliary |
| Capacity | 18.5 gal |
| Filler Point | Standard |
| Fuel Supply Method | Transfer pump to main fuel tank |
| Tank Location | Beneath mid vehicle |
| Fitting Time | Approx. 5.5 hours |
| Modifications | None required |
| Main Tank Capacity | 21.4 gal |
| Total Fuel Capacity | 39.9 gal |
| Fuel Capacity Increase | 86.4% |
| Estimated Range Standard Tank | 487 miles |
| Estimated Range With Auxiliary Tank | 909 miles |
| Fuel Consumption | 22.8 mpg |
