ISUZU Dmax / MAZDA BT50 3.0ltr Engine (2020+) 145ltr Replacement Fuel Tank


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The Isuzu D-MAX has been taking Australian’s around our huge country for over a decade. The difference now compared to the old days is how you carry the extra fuel required for your long distance trip. Dirty jerry’s is a thing of the past!

In only 2.5 hours your nearest Brown Davis dealer can remove your standard fuel tank and replace it with a whopping 145lt Brown Davis long range fuel tank! The replacement tank utilises factory components making for a quick and simple install with no modifications required. 


  • TANK TYPE: Replacement
  • CAPACITY: 145 Litres
  • FILLER POINT: Standard
  • TANK LOCATION: Replaces Standard Tank
  • FITTING TIME: 2.5 hour/s
  • MODIFICATIONS: None Required
  • Step by Step DIY instructions supplied
  • 3yr Warranty

FIGURES BASED ON CREW CAB LS-U 4X4 (as quoted by Isuzu)


  • 76 Litre Standard Tank
  • 145 Litre Brown Davis Long Range Fuel Tank
  • Fuel Consumption
    Manual (7.8LT) / Auto (8.0LT)
  • 974.36km / 950km
  • 1858.98km / 1812.50km
  • Percentage Increase
    Brown Davis Long Range Fuel Tank
  • 90.79% Increase in Capacity

Whilst every effort has been made to ensure these figures are accurate vehicles may vary. Vehicles should never be pushed to the point of running out of fuel as it may harm your vehicles engine.


  • 2020- all 4WD Models- single cab, space cab, crew cab, SX, LS-M, LS-U, X-TERRAIN – (Model introduced during this year)
  • 2021- all 4WD Models- single cab, space cab, crew cab, SX, LS-M, LS-U, X-TERRAIN – (Model introduced during this year)


In short, the distance to empty function on your trip computer will not remain accurate with your new tank. Your vehicles ECU has the volume of the original tank calibrated to it. As the Distance to Empty counts down, the float starts to move from Full to empty, because the volume of the tank has changed dramatically without changing any reference data for the ECU to base it’s calculations on, the Distance to Empty is incorrect.

Your fuel gauge will remain accurate, as the float inside the tank will indicate how much fuel is inside the tank, so your readings going from Full, to ¾ to ½ right down to empty will remain accurate as it is now. Your average fuel consumption calculations will remain accurate too, just not DTE.

What we tell our customers is that most or our Long Range Tanks will tend to ‘hang’ on full for a while longer than it did originally, simply put there’s more volume to be used before the float starts to move downward. Your low fuel warning light will work as intended.

The best tip we can give you is to reset your trip meter every time you fill your tank, over time you’ll be able to establish how far you can travel in different driving conditions.


Brand Brown Davis
Shipping Weight 50.0000kg
Shipping Width 0.650m
Shipping Height 0.560m
Shipping Length 1.400m
Shipping Cubic 0.509600000m3
Unit Of Measure ea


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