The Diesel Exhaust Fluid System expands Farming Simulator 25’s native DEF functionality into a complete system for compatible diesel vehicles. Compatible vehicles can use, monitor, transport, and refill Diesel Exhaust Fluid while you work.
The mod uses Farming Simulator 25’s native DEF fill type and consumer system. Diesel fuel and DEF remain completely independent, and vehicles without DEF, including gasoline-powered vehicles, remain unaffected.
Features
- Native FS25 DEF consumer support
- Automatic compatible vehicle detection
- Dedicated DEF HUD gauge
- Independent diesel and DEF tanks
- Native DEF consumption
- Separate DEF refilling
- 10 L DEF Jug
- 280 L DEF Pallet
- 1,000 L DEF IBC Tote
- Dynamic mounting and tension-belt support where applicable
- DEF transport support for compatible liquid carriers
- Clean store integration
- English and German localization
- Optimized models and textures
- Multiplayer supported
10 L DEF Jug
- Capacity: 10 L
- Price: $80
- A portable container for small top-offs, service trucks, or emergency refills
280 L DEF Pallet
- Capacity: 280 L
- Price: $1,250
- A larger farm-shop and fleet-service supply for keeping multiple vehicles topped off
1,000 L DEF IBC Tote
- Capacity: 1,000 L
- Price: $3,200
- Bulk DEF storage for farms, equipment yards, truck garages, and larger fleets
All three containers are fully functional and designed to work within the Farming Simulator 25 environment.
Vehicle Compatibility
Vehicles must be correctly configured with Farming Simulator 25’s native DEF fill type and DEF consumer system to use the vehicle-side DEF features.
A compatible diesel vehicle should contain its own DEF fill unit and native DEF consumer.
Vehicles without a DEF consumer will continue to operate normally and will not display the DEF gauge.
Compatible non-motorized liquid carriers that already support liquids such as water, milk, or diesel can also transport DEF. Compatibility with every third-party vehicle cannot be guaranteed because vehicle mods are created by many different authors and may use different configurations.
Tested
The release build has been tested for:
- DEF vehicle detection
- Native DEF consumption
- DEF HUD display
- Independent diesel and DEF levels
- DEF emptying
- DEF refilling
- Container interaction
- Store integration
- Compatible liquid-carrier support
- Savegame loading
- In-game operation
The final release build also passed GIANTS Farming Simulator 25 TestRunner 0.9.19 with all 14 test modules passing.
V1.1.0.0
- Added a 5,000 L Bulk DEF Tank
- Stores native DEF
- Can be refilled from compatible liquid carriers
- Dispenses DEF directly to compatible vehicles and trailers
- Includes dedicated store artwork and placeable collisions
- Added a Diesel & DEF Combo Tank
- 25,000 L Diesel capacity
- 5,000 L DEF capacity
- Separate internal storage for Diesel and DEF
- Shared bulk unloading point
- Selectable Diesel or DEF vehicle refill
- Dedicated store artwork and placeable collisions
- Universal DEF support for compatible non-motorized liquid carriers
- Compatible trailers supporting Water, Milk, or Diesel can also carry DEF
- Improved DEF refill and loading-station behavior
- Updated refill localization
- Cleaned and optimized placeable I3D mappings
- Improved collision setup for the new bulk tanks
- Added proper store-image mipmaps
- Optimized tank textures and removed duplicate assets
- Updated texture compression where appropriate
- Improved clip-distance settings on the new placeable models
- Updated modDesc and version history for current FS25 requirements
- Existing DEF Equipment: The following equipment remains included:
- 10 L DEF Jug
- 280 L DEF Pallet
- 1,000 L DEF IBC Tote
- Compatibility: Uses Farming Simulator 25’s native DEF fill type and vehicle consumption system
- Diesel and DEF remain completely independent
- Existing DEF vehicle HUD and consumption functionality remain unchanged
V1.0.0.2
- Fixed universal DEF support for compatible non-motorized liquid trailers.
- Corrected the vehicle specialization registration so DEF support is applied properly when the game loads.
- Compatible liquid carriers that already support Water, Milk, or Diesel can now also accept DEF.
- Verified working with the base-game ABI 550 Water Trailer.
- Existing DEF vehicle support, HUD, refill system, containers, and store integration remain unchanged.
- No pricing changes in this update.
