2025 Forest River Sierra 3990FL

Vehicle Photo
  • MSRP: $107,946
  • Dealer Discount: $18,166
  • Finance Incentive: $9,782
  • Sale Price: $79,998
  • As Low As: $575 /mo (Edit)
Stock #: 21159193
Phoenix (Mesa), AZ
  • Sold
  • New
  • Class: Fifth Wheel
  • Length: 43 ft 7in
  • Slides: 5
  • Dry Weight: 12,380
  • Sleeps: 8

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  • Front Entertainment
  • Front Living
  • Kitchen Island
  • Loft
  • Rear Bedroom
Floorplan
  • Available Beds King
  • Exterior Height 13 ft 4in
  • Exterior Width 8 ft
  • Gross Weight 15,375 lbs
  • Dry Weight 12,380 lbs
  • Tire Size 16"
  • Axle Count 2
  • Fresh Water Capacity 50 gal
  • Grey Water Capacity 80 gal
  • Black Water Capacity 50 gal
  • Furnace BTU 35,000
  • Refrigerator Type 12V
  • Refrigerator Size 17
  • Cooktop Burners 3
  • Shower Type Shower w/Seat
  • Number of Awnings 1
  • Washer/Dryer Available Yes
  • TV Info LR 50" Flat Screen TV

Forest River Sierra fifth wheel 3990FL highlights:

  • Full and Half Lofts
  • King Bed
  • Walk-In Shower
  • Front Living Area
  • Two Tri-Fold Hide-A-Beds
  • Theater Seating

 

The perfect fifth wheel for a larger family! This unit sleeps eight or more with the full and half lofts above the rear master bedroom and bathroom. In the full loft area there are two 44" x 74" bunk mats for comfort as well as wardrobe/storage at the head of each. The master bedroom features a king size bed that slides out to create more space by the bed. A spacious bath features a walk-in shower for comfort and includes a seat so you can relax while you shower. A spacious kitchen features two slides, a free standing dinette in one, and the 12V refrigerator and stove in the other. There is also a center island with large sink for added food prep space. Head up the steps in front to a dual slide front living area with 50" TV and fireplace beneath the window. There is also theater seating opposite the TV, and a tri-fold hide-a-bed in each slide allowing added sleeping space when needed.

 

Each one of these Forest River Sierra fifth wheels are equipped with everything you need to make the most of each adventure! The underbelly armor will protect your unit's vitals from road debris and the painted two tone aerodynamic fiberglass front cap has an improved turning radius to make them easier to navigate. With an electric leveling system, you can set your unit up quick and easy then get to having fun faster than ever. The welded aluminum framed, vacuum bonded laminated superstructure will hold up through every adventure and the cambered powder coated frame comes with rust prohibitor to last longer. Each model also includes the Summit Package that comes with a king Wi-Fi extender system and Olympus antenna, a full coach water filter system, Goodyear tires with 7,000 lb. axles, and the list goes on. The interior is just as impressive with rustic wood plank linoleum, recessed residential lighting, a memory foam mattress, and mocha accent crown molding over the kitchen cabinets!

†Lazydays strives to ensure the accuracy of the information provided on this website. However, actual products, programs and services may differ materially from those on this site. Lazydays is not responsible for errors made in stated pricing. Specifications and availability subject to change without notice. Sale price includes all manufacturer discounts and rebates. All prices listed on this site exclude tax, tags and title fees. Applicable government fees, state taxes, dealer fees and emissions testing charges will be added to comply with state vehicle codes. Freight and prep costs are additional and vary by state. Contact Lazydays for complete details.

*90 Days – Payments can be deferred for 90 days with approved credit. Interest accrues from contract date. Financing terms subject to lender approval. Not valid with other offers. Actual products, programs and services may differ materially from those on this site. Lazydays is not responsible for errors made in stated pricing. Specifications and availability subject to change without notice. Document fees vary by location. See dealership for complete details.

**Lazydays believes the specifications on this site supplied by the manufacturer to be correct at the time posted. However, specifications, standard equipment, model availability, options, fabrics, and colors are subject to change without notice. Some equipment may be unavailable when a vehicle is built. Some vehicles are pictured with options, which may be available at extra cost or may not be available on some models. You should verify the equipment that is on all vehicles. If a new vehicle shown on this website is subject to an open safety recall, Lazydays cannot deliver the vehicle to you until the recall repair is completed. This is a requirement of federal law.

***The advertised discount contains a $9,782 finance incentive, and is contingent upon financing your RV purchase through Lazydays. This finance incentive is subject to approval, and terms and conditions may apply. Contact our finance department for further details.