2025 Newmar Mountain Aire: ready for the road

Crafted to conquer mountains and built for adventure, the 2025 Newmar Mountain Aire is your new ride-along for all upcoming journeys. This coach is built for travelers who expect more than the norm from the road.

Your drive, your way

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.

2025 Newmar Mountain Aire features/overview

2025 Newmar Mountain Aire Floorplans

Watch Walkthrough

2025 Newmar Mountain Aire 3823 RV

Sleeps 6

4 Slideouts

2025 Newmar Mountain Aire 4118 RV

Sleeps 5

3 Slideouts

Watch Walkthrough

2025 Newmar Mountain Aire 3825 RV

Sleeps 4

3 Slideouts

2025 Newmar Mountain Aire RVs for Sale

28
2025 Newmar Mountain Aire 3825

at Transwest of Frederick, CO

New Class A
- Sleeps 4
- Diesel
- 3 Slide Outs
Contact For Price
- See Details
Sold

4
2025 Newmar Mountain Aire 3825

at Transwest of Frederick, CO

New Class A
- Sleeps 4
- Diesel
- 3 Slide Outs
Sold
- See Details

Shop All 2025 Newmar Mountain Aire RVs

2025 Newmar Mountain Aire Features

Disclaimer: The features below might not reflect what exactly will be on the vehicle.

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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.

Preview image of 2025 Newmar Mountain Aire 3825 Luxury Class A Motorhome youtube video

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Walkthrough of 2025 Newmar Mountain Aire 3825

By Katie O'Neil • 2 weeks ago 1.8k views

Preview image of The Hot Rod 2025 Newmar Mountain Aire 3825 With The Onyx Blackout Package youtube video

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Walkthrough of 2025 Newmar Mountain Aire 3825

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Preview image of 2025 Newmar Mountain Aire 3823 youtube video

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Walkthrough of 2025 Newmar Mountain Aire 3823

By Dean Jones • 9 months ago 5.9k views

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Walkthrough of 2025 Newmar Mountain Aire 3823

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Featured Article

Newmar's 2025 Lineup

As a giant in the RV industry, Newmar continues to outdo itself with every product launch. As we begin taking off on 2025's great adventures, let's take a look at the new and improved Newmar models th...

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.

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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.