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2025 Newmar Mountain Aire 3825 $597,388
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See More Newmar Class A RVs for Sale

2025 Newmar Mountain Aire 3825

Used Class A RV

at Transwest of Frederick, CO

$597,388

42 views

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Transwest | Image Coming Soon
Transwest | Image Coming Soon

Used Class A RV

at Transwest of Frederick, CO

$597,388

  • Sleeps 4
  • Diesel
  • 3 Slide Outs

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.

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Specifications
Type
Class A
Year
2025
Make
Newmar
Model
Mountain Aire
Submodel
3825
Chassis Brand
Spartan
Stock ID
5U260482
VIN (Last 6)
095883
List Price
$597,388
Status
Available
Condition
Used
Living Quarters
No
Amenities
Living Room Amenities
  • Dinette
  • Televator
Kitchen Amenities
  • Central Vac
  • Microwave/ Convection Oven
  • Power Shades
  • Refrigerator Residential
Kitchen Appliances
  • Convection Microwave
  • Induction cooktop
Living Area Seating Options
  • Sofa Sleeper
Bedroom Amenities
  • King Bed
Additional Beds
  • Sofa Sleeper
Bathroom Amenities
  • Medicine Cabinet
  • Shower
  • Shower Seat
  • Skylight
  • Single Sink
  • Linen Storage
  • Macerator Toilet
Cab Amenities
  • Cruise Control
  • Navigation
  • Power Shades
  • Tilt/Telescoping Steering
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
Patio, Window
Number of Awnings
2
Number of Emergency Exits
1
Interior
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)
12,500
Heating System
Hydronic
Generator Size (kW)
1500
Black Water Capacity (gal)
40
Fresh Water Capacity (gal)
105
Gray Water Capacity (gal)
80
Dimensions & Weights
Height
13
Width
8
Empty Weight
40,135
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
Jack Type
Hydraulic

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

Mountain Aire 3825 Floor plan

Disclaimer: This floor plan might not reflect what exactly will be on this vehicle.

2025 Newmar Mountain Aire 3825
Download Floor Plan

2025 Newmar Mountain Aire 3825 Floor Plan

2025 Newmar Mountain Aire 3825

Walkthrough of a Similar Model

Disclaimer: This walkthrough is of a similar unit; expect differences in features and decor. Please contact Transwest directly if you have specific requests that are not answered in this video or if you'd like an in-person tour.

Preview image of the linked video

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Our Customers Say It Best

2025 Newmar Mountain Aire Features

Newmar
Download the Brochure
  • Driver's seat inside the 2025 Mountain Aire

    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.
  • Front to back view of the 2025 Mountain Aire cabin

    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.
  • 2025 Mountain Aire kitchen

    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.
  • Wardrobe of the 2025 Mountain Aire

    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.
  • Shower aboard the 2025 Mountain Aire

    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.
    Review

    2026 Newmar Mountain Aire 3825 Walkthrough Tour

    Some coaches just feel right. The 2026 Newmar Mountain Aire 3825 blends bold looks, smart features, and an easy-to-navigate layout that takes the hassle out of travel from the very beginning. It&rsq...
    Read More
    a preview image of the linked video

    Calculate Your Payments

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    $0 /mo
    Based on average APR of 7.5% and original MSRP value.
    Apply for Financing

    Disclosure

    This calculation does not consider title, registration, taxes, and other fees. It also does not consider personal circumstances such as employment status and personal credit history, which may have an impact on interest rates that an individual may qualify for. This calculation is intended to provide an estimate and are for informational purposes only.

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    Frederick, CO RV Image 1

    This RV can be found at our Transwest location near Denver, CO

    4001 Commerce Dr
    Frederick, CO 80504

    (303) 684-3450

    Location Details
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    At Transwest, we only carry the best quality RV makes. Not only can we help you find exactly what you're looking for, but we also offer financing, parts, and service. Think of us as your one-stop-shop for RVs. Find the perfect RV for you.

    Frequently Asked Questions

    Can I finance an RV?

    Yes, RVs can be a big purchase, so there is a range of financing options available to keep you within budget. At Transwest, we have an in-house financing team that specializes in financing recreational vehicles. They know the industry as well as the needs of RVers, so they’re happy to help you find the right financing for your motorhome.

    What should I do with my old RV?

    We’ll buy it! At Transwest, we buy used RVs. In particular, we are always looking for late model Class A RVs, Class B RVs, Class C RVs, and Super C RVs, although we’re happy to discuss other types of RVs you’d like to sell. Submit an inquiry to get started.

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    Our team at Transwest takes care of the title work when you finance an RV.

    What if I want to add upgrades or accessories to my RV?

    One of the great aspects of an RV is customizing it to your needs and wants. At Transwest, we have a full RV parts department that carries both mechanical parts and additional accessories for sale. You’ll be able to find the add-ons that help make your RV feel like home.

    Do I need a certain credit score to finance an RV?

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    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.

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    2025 Newmar Mountain Aire 3825

    Transwest of Frederick, CO
    4001 Commerce Dr
    Frederick, CO 80504
    (303) 684-3450

    $597,388

    Description

    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.

    Floor Plan

    2025 Newmar Mountain Aire 3825 Floor Plan

    Specifications

    • Type Class A
    • Year 2025
    • Make Newmar
    • Model Mountain Aire
    • Submodel 3825
    • Chassis Brand Spartan
    • Stock ID 5U260482
    • VIN (Last 6) 095883
    • List Price $597,388
    • Status Available
    • Condition Used
    • Living Quarters No

    Amenities

    • Living Room Amenities: Dinette, Televator.
    • Kitchen Amenities: Central Vac, Microwave/ Convection Oven, Power Shades, Refrigerator Residential.
    • Kitchen Appliances: Convection Microwave, Induction cooktop.
    • Living Area Seating Options: Sofa Sleeper.
    • Bedroom Amenities: King Bed.
    • Additional Beds: Sofa Sleeper.
    • Bathroom Amenities: Medicine Cabinet, Shower, Shower Seat, Skylight, Single Sink, Linen Storage, Macerator Toilet.
    • Cab Amenities: Cruise Control, Navigation, Power Shades, Tilt/Telescoping Steering.
    • 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 Patio, Window
    • Number of Awnings 2
    • Number of Emergency Exits 1

    Interior

    • 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) 12,500
    • Heating System Hydronic
    • Generator Size (kW) 1500
    • Black Water Capacity (gal) 40
    • Fresh Water Capacity (gal) 105
    • Gray Water Capacity (gal) 80

    Dimensions & Weights

    • Height 13
    • Width 8
    • Empty Weight 40,135
    • 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
    • Jack Type Hydraulic
    Mountains

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