Brown Davis 145 Litre Replacement Long Range Fuel Tank for Isuzu D-MAX (2020–Present)
- ✅ 145 litre replacement capacity — replaces the factory 76L tank, a 90.8% increase in driving range
- ✅ Fits Isuzu D-MAX (2020–Present) — all 4WD models, all cab configurations, SX to X-TERRAIN
- ✅ Direct bolt-in solution — no modifications required, retains standard filler, gauge, and pump assembly
- ✅ High-grade aluminised steel — 2mm 14 gauge construction, no rust, built for off-road durability
- ✅ Internal baffles, drain plug, fast-fill breather — engineered for performance in all conditions
- ✅ Compatible with all suspension, airbags, GVMs and most aftermarket exhausts and trays
- ✅ 3-year manufacturer's warranty — Brown Davis, Australia's most trusted tank brand since 1978
- ✅ Step-by-step DIY installation instructions included — all hardware and parts supplied
Checkout securley with
- Description
- Specifications
- Driving Range Comparison
- Compatibility
- Installation Instructions
- 🛡️ Fitment Advice
Brown Davis 145 Litre Replacement Long Range Fuel Tank for Isuzu D-MAX (2020–Present)
The Brown Davis 145 Litre Replacement Long Range Fuel Tank (ISD20R1) is the ultimate fuel capacity upgrade for Isuzu D-MAX (2020–Present) owners who need to go further, stop less, and work harder. Engineered and manufactured in Australia by Brown Davis — the country's most trusted name in long range fuel systems since 1978 — this tank directly replaces the factory 76 litre tank, nearly doubling your fuel capacity and dramatically extending your driving range.
Whether you're a serious 4WD tourer exploring remote outback tracks, or a tradie who needs to cover more ground without constant refuelling stops, the ISD20R1 is a practical, no-compromise solution. It retains the vehicle's standard filler point, fuel gauge, and pump assembly — making installation clean and straightforward with no modifications required.
At Brixton 4x4, we stock the full Brown Davis range and stand behind the quality of their engineering. The ISD20R1 is compatible with all D-MAX cab configurations — crew cab, space cab, and single cab — and suits all 4WD variants from SX through to X-TERRAIN.
Fits: Isuzu D-MAX (2020–Present) — All 4WD Models | Single Cab, Space Cab, Crew Cab | SX, LS-M, LS-U, X-TERRAIN | 3L Engine
Step-by-step DIY installation instructions with photographs and diagrams are included with every tank.
Why Choose the Brown Davis ISD20R1 Long Range Fuel Tank?
Brown Davis has been manufacturing long range fuel tanks in Australia since 1978. Every tank is laser cut from high-grade aluminised steel, folded for superior structural strength, precision welded using fitting jigs, and pressure tested before leaving the factory. The result is a fuel tank that performs reliably in the most demanding environments your D-MAX will ever face.
Backed by a 3-year manufacturer's warranty and available at Brixton 4x4, this tank comes complete with all parts and hardware required for installation.
Key Features
- 145 litre replacement capacity — replaces the factory 76L tank, a 90.8% increase in fuel range
- High-grade aluminised steel construction — strength of steel with the corrosion resistance of aluminium, no rust
- Tapered approach angle — reduces frontal impact risk and improves ramp-over clearance
- Internal baffling system — prevents fuel slosh and reinforces overall tank structure
- Gusseted brackets with double thickness pads — spreads mounting loads for a secure, reliable fit
- Fuel pump sender flange — designed to re-use the vehicle's original equipment
- Roll-over check valve and expansion box — safe fuel expansion and venting in all orientations
- Retains standard filler point — connects to the vehicle's original filling point
- Fast-fill breather — rapid filling and reduced bowser shut-off
- Cushion clamp locators — retains fuel lines and prevents kinking and damage
- Drain plug — easy removal of contaminated fuel or fuel sharing in the field
- No modifications required — direct bolt-in replacement
- Compatible with all cab configurations — crew cab, space cab, and single cab
- 3-year manufacturer's warranty — backed by Brown Davis' Australia-wide support network
- All hardware and parts supplied — everything needed for installation included in the box
| Part Number | ISD20R1 |
| Tank Type | Replacement |
| Capacity | 145 Litres |
| Tank Location | Replaces factory standard tank |
| Filler Point | Retains standard filler point |
| Fuel Supply Method | Standard |
| Material | High-grade aluminised steel (2mm, 14 gauge) |
| Engine | 3L |
| Fitting Time (approx.) | 2.5 hours |
| Modifications Required | None required |
| Warranty | 3 Years (Brown Davis) |
| Brand | Brown Davis |
| Consumption (Manual 7.7L / Auto 8L per 100km) | Estimated Range | Increase | |
|---|---|---|---|
| 76L Standard Tank | 7.7L / 8.0L per 100km | 987km / 950km | — |
| 145L Brown Davis ISD20R1 | 7.7L / 8.0L per 100km | 1,883km / 1,812km | +90.8% |
Figures based on Crew Cab LS-U 4X4 fuel consumption as quoted by Isuzu. Range figures are approximate and will vary based on driving conditions, terrain, load, and vehicle specification. Vehicles should never be driven to the point of running out of fuel.
| Year | Cab Configuration | Variants |
|---|---|---|
| 2020 | Single Cab, Space Cab, Crew Cab | SX, LS-M, LS-U, X-TERRAIN (all 4WD models — introduced late 2020) |
| 2021 | Single Cab, Space Cab, Crew Cab | SX, LS-M, LS-U, X-TERRAIN (all 4WD models) |
| 2022 | Single Cab, Space Cab, Crew Cab | SX, LS-M, LS-U, X-TERRAIN (all 4WD models) |
| 2023 | Single Cab, Space Cab, Crew Cab | SX, LS-M, LS-U, X-TERRAIN (all 4WD models) |
| 2024 | Single Cab, Space Cab, Crew Cab | SX, LS-M, LS-U, X-TERRAIN (all 4WD models) |
| 2025 | Single Cab, Space Cab, Crew Cab | SX, LS-M, LS-U, X-TERRAIN (all 4WD models) |
International: Confirmed fitment with Thailand / Asia / South Africa world-spec vehicles.
Aftermarket Compatibility:
- Suspension: Confident fitment with all suspension, airbags and GVMs
- Alloy and Steel Trays: Confident fitment with most aftermarket trays — filler may need relocating after tank fitment. Some under-tray drawers may interfere with the tank.
- Exhausts: Confident fitment with most aftermarket exhausts
Comprehensive step-by-step DIY fitting instructions with photographs and diagrams are included with every tank. The following is a general overview of the installation process.
1. Unpack the tank and verify all components, hardware, and fitting instructions are present before beginning.
2. Safely raise and support the vehicle to gain access to the underside and the factory fuel tank mounting location.
3. Drain any remaining fuel from the factory tank and disconnect all fuel lines, sender wiring, filler tube, and breather lines.
4. Remove all factory tank mounting hardware and lower the original tank from the vehicle.
5. Transfer the factory fuel pump sender assembly to the Brown Davis tank — the ISD20R1 is designed to reuse the vehicle's original equipment.
6. Offer up the Brown Davis tank to the mounting location, align all bracket points with the vehicle's existing fixings, and hand-tighten the mounting hardware.
7. Reconnect all fuel lines using the supplied cushion clamp locators to secure lines and prevent kinking.
8. Connect the filler tube to the vehicle's standard filler point — no filler neck modifications are required.
9. Torque all mounting fasteners to specification, inspect all connections, and check for leaks before refuelling and driving.
For further assistance, please contact our support team.
