Loft, bunkhouse, mid bunk, desk, farmhouse sink
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2026 Forest River Sandpiper 4003MB
NewStock #107037
Listing price
2026 Sandpiper 4003MB
Other floor plans with a similar body style, feature mix, and price range, prioritizing other manufacturers and brands.
What sets the 4003MB apart from a typical bunkhouse fifth wheel is how it stacks its sleeping and living spaces: a mid-bunk section keeps kids separate from the front bedroom's King bed, while a loft above the bedroom adds a third zone that doubles well as a hangout or overflow sleeping area. The rear living area flips the usual floor plan convention and earns its own panoramic rear window, making it feel surprisingly open. In the kitchen, a farmhouse sink and hidden pantry are genuinely useful touches. The concealed pantry in particular tends to be a crowd-pleaser in walkthroughs. A built-in desk, washer/dryer prep, solid surface countertops, and dual 15k BTU A/Cs round out a layout that packs a lot of livability into one unit, with Sandpiper's typical value-forward feature set rather than premium fit and finish.
Length
42 ft 9 in
Dry weight
12,609 lbs
GVWR
15,500 lbs
Sleeps
8
Many factors play into a unit's listing price and what you should pay. This guide provides a ballpark estimate, but it does not factor in your exact scenario or how different listings are equipped.
$57,978 – $78,995
This unit is ranked 3 of 11 by asking price in this group.
The listing price on this unit has changed 8 times.
See the complete price timeline and the rest of this unit's pricing insights.
Campers Inn RV
Lebanon Junction, KY
Compared with 1,115 dealers nationwide
Top Highlights:
Versatile Middle Bunkhouse with Loft and Workspace
King Bed Slide Out & Oversized Front Wardrobe
Hidden Kitchen Pantry with Island Prep Space
Outdoor Flat Top Grill, Mini Fridge & 20' Awning
Exterior Docking Station & Pass-Through Storage
Enjoy spacious, residential-style comfort in the Forest River Sandpiper 4003MB — the ultimate fifth wheel for travelers who won’t compromise on features or flexibility. The private front bedroom offers a king-size slide-out bed, generous wardrobe with shelving, and washer/dryer prep for extended-stay convenience.
Your guests will appreciate the multi-purpose bunkhouse with a hide-a-bed sofa, overhead bunk, dedicated desk, and loft for added sleeping or storage. The central living area boasts a free-standing dinette, rear hide-a-bed sofa, and theater seating perfectly placed across from the entertainment center.
In the kitchen, enjoy stainless steel appliances, solid surface countertops, and a hidden pantry paired with a large island for effortless meal prep. Head outside to cook under the stars with the flat top grill and mini fridge, and take advantage of the pass-through storage for outdoor gear.
Built to go the distance:
Welded aluminum frame with laminated superstructure
Powder-coated, cambered frame with rust protection
Fully enclosed underbelly shields against the elements
Step into style and convenience:
60k BTU on-demand water heater & full coach filtration system
Tire pressure monitoring and electric leveling for peace of mind
Beachside Sundance linoleum, recessed lighting, and premium finishes
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