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The Titan Fuel Tanks 4030203 Spare Tire Auxiliary Fuel System is a 30-gallon, diesel-only auxiliary tank engineered for 2003–2012 Dodge Ram 2500 and 3500 trucks equipped with Cummins engines. This system replaces the factory spare tire mount, providing increased fuel capacity without sacrificing bed space.
30-gallon auxiliary diesel fuel capacity
Mounts in the spare tire location for space-efficient fuel expansion
Designed specifically for Dodge Ram 2500 and 3500 (2003–2012)
Compatible with Cummins diesel engines
Extra heavy-duty, cross-linked polyethylene construction
Corrosion-proof and impact-resistant design
Adds significant driving range without modifying the OEM tank
Retains full bed usability
Strong, durable mounting configuration
| Specification | Details |
|---|---|
| Brand | Titan Fuel Tanks |
| Part Number | 4030203 |
| Product Type | Spare Tire Auxiliary Fuel System |
| Fuel Type | Diesel only |
| Capacity | 30 gallons |
| Material | Extra heavy-duty cross-linked polyethylene (implied by product line) |
| Dimensions | Not specified |
| Weight | Not specified |
| Mounting Location | Spare tire position |
| Sending Unit Compatibility | Not specified |
| Transfer Method | Not specified |
Dodge Ram (2003–2012):
Ram 2500
Ram 3500
Compatible with Cummins diesel-equipped models only.
For diesel fuel only
Replaces factory spare tire mounting location
Designed for Cummins engine configurations
