Walkthrough of 2025 Newmar Mountain Aire 3825

Name: Walkthrough of 2025 Newmar Mountain Aire 3825
Uploaded: 2025-07-29T05:41:41+00:00

by Katie O'Neill Jul 29 2025

3.2k views

Join Katie O'Neill for a walkthrough video tour of the 2025 Newmar Mountain Aire 3825 RV, available for purchase at Transwest. This video tour highlights the specifications and features of the 2025 Newmar Mountain Aire 3825, including engine, fuel, and towing capabilities, as well as creature comforts like decor, sleeping quarters, kitchen, and bathroom accommodations, and entertainment. Our friendly and knowledgeable staff is available to answer any additional questions not covered in the RV video tour, and we are happy to help. So, check out the video and feel free to contact Transwest for more information or to schedule an in-person tour of the 2025 Newmar Mountain Aire 3825 or any other RV.

Featured RV

Sold

2025 Newmar Mountain Aire 3825

at Transwest of Frederick, CO

New Class A

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Contact Transwest of Frederick, CO (303) 684-3450

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About the Newmar Mountain Aire 3825

Sleeps 4
Diesel
3 Slide Outs
3' 2''

The 2025 Mountain Aire isn’t just performance; it’s about making your travel life easier. Built on the Spartan® K3 chassis with a passive steer tag axle, it helps with tight turns and makes handling easier than ever. A 525-horsepower Cummins® turbo diesel engine gives you the muscle to tow up to 15,000 pounds without breaking a sweat.

Specifications

Type: Class A
Year: 2025
Make: Newmar
Model: Mountain Aire
Submodel: 3825
Chassis Brand: Spartan
Stock ID: 5N250035
VIN (Last 6): 095881
Status: Sold
Condition: New
Living Quarters: No

Amenities

Living Room Amenities: Tile Flooring

Accent Lighting

Power Shades

Dining Table w/Chairs

TV

Home Theater System

Theater Seating
Kitchen Amenities: Accent Lighting

Central Vac

Dishwasher

Fantastic Fan

Lower Cabinets

Microwave/ Convection Oven

Pantry

Power Shades

Refrigerator Residential

Single Sink

Solid Surface Counters

Tile Flooring

Upper Cabinets

Electric Cooktop

Stainless steel appliances
Kitchen Appliances: Convection Microwave

Induction cooktop
Living Area Seating Options: Sofa Sleeper
Bedroom Amenities: Accent Lighting

Home Theatre

King Bed

Power Shades

Tile Flooring

TV

Closet

Dresser
Additional Beds: Sofa Sleeper
Bathroom Amenities: Medicine Cabinet

Shower

Shower Seat

Skylight

Single Sink

Linen Storage

Macerator Toilet
Cab Amenities: OnGuard™ Collision Mitigation Adaptive Cruise System with Adj. Following Distance Control

Power mirrors w/defrost and turn signals

Rear and Side View Cameras

Cruise Control

Comfort Drive Steering

Push Button Start

Touchscreen

Radio

Apple Carplay

Android Auto

Navigation
General Amenities: Dual Pane Windows

Fire Extinguisher

LP, smoke and carbon monoxide detectors

Washer/Dryer Stackable

Central Vacuum

Exterior

Roof Type: Fiberglass
Number of Slide Outs: 3
Awning: Roof
Number of Awnings: 2
Number of Emergency Exits: 1

Interior

Interior Height: 6
Entry Flooring: Tile
Sleeping Capacity: 4
Master Bedroom Bed Size: King
Master Bedroom Bed Type: Standard
Master Bedroom Flooring: Tile
Number of Bathrooms: 1 1/2
Bath Flooring: Tile
Dining Table: Euro Booth Dinette
Living Room Flooring: Tile
Kitchen Flooring: Tile
Kitchen Refrigerator Type: Residential Refrigerator
Kitchen Refrigerator Size(ft): 19.7

Systems

Battery Type: AGM
Battery Size: 600
Shore Power Size: 50 Amp
Inverter: Yes
Solar: Yes
Generator: Yes
Water Heater Type: Hydronic
Number of ACs: 2
AC Rating (BTU): 15,000
Heating System: Hydronic
Generator Make: Onan
Generator Size (kW): 10000
Black Water Capacity (gal): 60
Fresh Water Capacity (gal): 105
Gray Water Capacity (gal): 80

Dimensions & Weights

Height: 13' 2''
Width: 7' 9''
Overall Length: 3' 2''
Empty Weight: 40,569
GVWR (lbs): 54,000
UVW (lbs): 41,000
Payload Capacity (lbs): 13,000
Tongue Weight (lbs): 1,500
Hitch Capacity (lbs): 15,000

Engine & Chassis

Engine Make: Cummins
Fuel Capacity (gal): 150
Fuel Type: Diesel
Horse Power: 525
Transmission Make: Allison
Transmission Model: 4000 MH
Transmission Type: 6-Speed Automatic
Drive Train: Tag Axle
Jack Type: Hydraulic

Disclaimer: Not every vehicle includes every feature or option listed. Please verify all features and options with your salesperson before purchase.

Floor plan

Disclaimer: This floor plan is for general reference. Actual features and styling could differ.

Download Floor plan

Video Created by Katie O'Neill

at Transwest of Frederick, CO Class As, Custom Design, Interior Design, Newmar, Renegade, Winnebago, Freightliner, Full-Time RVing Specialist

My career in automotive sales began with a less than ideal car-buying experience of my own and I’ve spent the last 25 years making sure no one else ever has that same feeling. My value is providing a mix of aesthetic and mechanical consultation regarding the choices available within the brands I represent. I blend technical mastery with an understanding of market availability and customer needs.

Whether you’re looking for your first RV, trading up to a luxury diesel pusher, or adding the perfect trailer or truck to your lineup, I’d love to put my quarter-century of award-winning sales experience to work for you the same way I do for every client: honest, transparent, and 100% focused on making this the easiest (and most fun) vehicle purchase you’ve ever made.

2025 Newmar Mountain Aire Features

Download the Brochure

Power meets precision

Newmar’s STAR Foundation keeps your ride quiet, while Comfort Drive™ steering takes the strain out of long hours of driving. On the outside, you’ll find the BASF® Masterpiece Finish, flush-mounted slide-outs, and deep-set frameless windows that look sharp. With OmniView™ cameras, docking lights, and powered storage trays, every setup feels so effortless.
Comfort surrounds you

Inside the Mountain Aire, everything is there with a purpose. Premium hardwood cabinetry, tile floors, and soft accent lighting create a warm and welcoming atmosphere. A large living area welcomes you with theater seating, a Euro-style booth dinette, and a 50-inch 4K TV, paired with a high-end Bose® soundbar and subwoofer.
Mobile kitchen

The Mountain Aire’s kitchen is built to handle everything from quick bites to full meals. Solid surface countertops, a deep dual-basin sink, and handcrafted cabinetry are standouts. You’ll get a removable True Induction cooktop, convection microwave, Fisher & Paykel dishwasher, and a full-size fridge. With adjustable pantry trays and smooth-gliding drawers, everything stays organized and within easy reach.
Rest, reset, recharge

The bedroom offers A+ comfort with a king-size bed, built-in storage, and details throughout. A 43-inch 4K TV sits across from the bed, with wardrobes, drawers, and hidden compartments. Nightstands feature outlets, USB ports, and pass-throughs for charging gear or devices. You can sleep in and adjust the lights and shades from your phone or bedside panel.
Bathroom, upgraded

The Mountain Aire includes a full rear bath and a half bath mid-coach. The main bath features a tile-lined shower with a teak seat, while the coach-wide Aquaview Aqua Miser system helps conserve water throughout your trip. Dual vanities, solid surface countertops, and soft-close drawers give room to space out your toiletries.

Frequently Asked Questions

How many floor plans are there for the 2025 Mountain Aire?

There are five total floor plans available: 3823, 3825, 4118, 4551, and 4595.

How much can the Mountain Aire tow?

The 2025 Mountain Aire has a 15,000-pound towing capacity so that you can bring along a trailer, toad, or stacker with confidence.

How many people can sleep in the Mountain Aire?

Four people have designated sleeping areas in the Mountain Aire.

Who manufactures the Mountain Aire?

Newmar has been setting the standard for Class A diesel motorhomes since 1968, and the Dutch Star is one of its most iconic creations.

Our Customers Say It Best

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Integrity

The Transwest Difference

It's not always easy to find a motorhome that fits your unique needs away from home. At Transwest, we're committed to finding you the Recreational Vehicle unit that meets the goals of you and your family. Whether you're a frequent, spontaneous, full-time, or weekend traveler, we work to provide you with the quality, comfort, and reliability you need to stay on the road.

We carry only the highest quality makes in Recreational Vehicles that are guaranteed to give you a luxurious experience on the road. Spacious 5th Wheels are sure to satisfy your inner weekend warrior, and Emerald Luxury Coaches offer uniqueness and specialized craftsmanship. For all the comforts of home, look no further than Class A and Super C motorcoaches. Class B or C motorhomes give you flexibility on the road.

For 25 years, Transwest has been proactive about finding better crafted and more efficient transportation solutions. As a family-owned company, we understand the importance of relationships. We stay in close communication with our customers throughout every step of the process: purchasing or leasing, financing, maintaining, and reselling. We also offer a state-of-the-art body shop to keep you on the road. Our mission is to be a one-stop-shop for all your RV and motorhome needs.