| Year | 2025 |
| Manufacturer | FOREST RIVER |
| Brand | SIERRA |
| Model | 4003MB |
| Type | Fifth Wheel |
| Class | |
| Fuel Type | |
| Status | New |
| Stock # | 25FR007 |
| Financing Available | |
| Warranty Available | |
| Odometer | |
| VIN | |
| Chassis | |
| Engine | |
| Transmission | |
| Suspension | N/A |
| Leveling | N/A |
| Exterior Length | 42.8 ft. |
| Dry Weight | 12609 lbs. |
| Sleeping Capacity | 9 person(s) |
| Interior Colour | N/A |
| Exterior Colour | Fiberglass |
| Slideouts | 4 |
Disclaimer: Product information, pricing and photos are as accurate as possible and are subject to change without notice.
Step into the future of fifth-wheel travel with the 2025 Forest River Sierra 4003MB—a perfect blend of modern luxury, innovative design, and rugged durability. Whether you're a full-time RVer, a weekend warrior, or a fami...