2025 Forest River Sierra 4003MB

Used Fifth Wheel in Montclair, California, 91763

Used 2025 Forest River Sierra 4003MB available in Montclair, California

2025 Forest River Sierra 4003MB - Used Fifth Wheel For Sale by Giant RV in Montclair, California

2025 Sierra 4003MB by Forest River from Giant RV in Montclair, California

Unit Specs

Stock #FSL2186A
Year2025
ManufacturerForest River
Make Forest River
ModelSierra
Floorplan4003MB
Floorplan LayoutLoft
Type Fifth Wheel
ConditionUsed
Length42' 9"
VIN4X4FSES25SJ053817
Price Get Price
Need to know your payment? Use our RV Loan Calculator!
Sleeps9
Water Capacity (Fresh)50 gal
Water Capacity (Black)50 gal
Water Capacity (Grey)100 gal
Slideouts4

Looking to buy a 2025 Forest River Sierra Fifth Wheel RV?

Overview

The 2025 Forest River Sierra 4003MB is a Towable designed for full-time living, giving traveling households a spacious retreat with a center-bedroom floorplan, loft, bunk bed, king-size bed, and sleeping capacity for 9. Forest River Sierra offers 4 slideouts, 2 recliners, 2 sofas, and a full-size refrigerator for comfortable extended stays. Its 513-inch length, 15,500-pound GVWR, 50-gallon fresh water tank, aluminum wheels, fiberglass sidewalls, JBL Bluetooth® audio, and power retractable awning support confident travel and relaxing campsite living. View the Forest River Sierra at Giant RV.

View a video of this 2025 Forest River Sierra 4003MB RV on YouTube!

This 2025 Forest River Sierra 4003MB is the perfect rig for your adventures and explorations. This 2025 Forest River Sierra 4003MB welcomes you into the Forest River family! The sleep capacity allows you to bring up to 9 along on your travels in this rig. You won’t believe how big this RV feels with 4 slides. The 50 gallon fresh water tank is just right for easy RV traveling.

2025 Forest River Sierra 4003MB Features

2025 Forest River Sierra 4003MB Specifications

Dimensions

Height

13' 4"

Length

42' 9"

Width

8' 0"

Weights

Dry Weight

12,609 lbs

GVWR

15,500 lbs

Hitch Weight

2,010 lbs

Payload Capacity

2,891 lbs

Capacities

Refrigerator Capacity

16.2 cu ft

Sleep Capacity

Water Capacity - Black

52 gal

Water Capacity - Fresh

50 gal

Water Capacity - Grey

104 gal

Exterior

# Awnings

# Axles

# Doors

# Slides

Hitch

Fifth Wheel

Electrical

# A/C

A/C Spec

15k BTU Air Conditioners

*MFG Specs are for the base unit. Certain options may change specifications listed. Please consult dealer for more details. RVUSA.com cannot guarantee the accuracy of the data presented.