2026 Forest River Sierra 4002FB

New Fifth Wheel in Downey, California, 90241

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New 2026 Forest River Sierra 4002FB available in Downey, California

2026 Forest River Sierra 4002FB - New Fifth Wheel For Sale by Giant RV in Downey, California

Unit Specs

Stock #FSI199
Year2026
ManufacturerForest River
Make Forest River
ModelSierra
Floorplan4002FB
Type Fifth Wheel
ConditionNew
Length43' 5"
VIN4X4FSES23TJ055034
MSRP $119,897.85
Sale Price Get Sale Price!
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Water Capacity (Fresh)50 gal
Water Capacity (Black)100 gal
Water Capacity (Grey)100 gal

Looking to buy a 2026 Forest River Sierra Fifth Wheel RV?

2026 Forest River Sierra 4002FB

The 2026 Forest River Sierra 4002FB is a spacious and residential-style fifth wheel designed for families, guests, or extended living. Featuring a unique two-bedroom, two-bath layout with loft space, this model delivers true home-like comfort with expansive living areas, premium finishes, and exceptional functionality for long-term stays or group travel.

Highlights:

• Two Bedroom + Loft Design with front and rear queen bedrooms, a central loft, and two full bathrooms — perfect for families or shared living setups.

• Residential Kitchen & Living Space featuring a large kitchen island, 16 cu. ft. refrigerator, solid-surface countertops, and an open-concept layout with multiple slide-outs for maximum space.

• Extended Stay Comfort & Premium Features including dual 15K BTU A/C units, heated and enclosed underbelly, tankless water heater, solar panel, automatic leveling, dual power awnings, and abundant interior/exterior storage.

Visit Giant RV today to explore the 2026 Forest River Sierra 4002FB — a fifth wheel built for space, comfort, and true residential living on the road.

2026 Forest River Sierra 4002FB Features

2026 Forest River Sierra 4002FB Specifications

Dimensions

Height

13' 4"

Length

43' 5"

Width

8' 0"

Weights

Dry Weight

12,889 lbs

GVWR

15,500 lbs

Hitch Weight

2,340 lbs

Payload Capacity

2,611 lbs

Capacities

Refrigerator Capacity

16 cu ft

Sleep Capacity

Water Capacity - Black

100 gal

Water Capacity - Fresh

50 gal

Water Capacity - Grey

100 gal

Exterior

# Awnings

# Axles

# Doors

# Slides

Hitch

Fifth Wheel

Electrical

# A/C

A/C Spec

Dual ducted 15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C

*MFG Specs are for base unit. Certain options may change specifications listed. Please consult dealer for more details. Data is provided by a 3rd party. RVUSA.com cannot guarantee the accuracy of the data presented.