Walkthrough of 2026 Newmar Mountain Aire 4118

Name: Walkthrough of 2026 Newmar Mountain Aire 4118
Uploaded: 2026-01-02T22:36:46+00:00

by Dwayne Pinnell Jan 02 2026

332 views

Join Dwayne Pinnell for a walkthrough video tour of the 2026 Newmar Mountain Aire 4118 RV, available for purchase at Transwest. This video tour highlights the specifications and features of the 2026 Newmar Mountain Aire 4118, 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 2026 Newmar Mountain Aire 4118 or any other RV.

Featured RV

2026 Newmar Mountain Aire 4118

at Transwest of Belton, MO

New Class A

$942,350 msrp

Shop this Vehicle

About the Newmar Mountain Aire 4118

Sleeps 3
Diesel
3 Slide Outs
665 Miles

The 2026 Mountain Aire packs big-time power, earns all the style points, and delivers on its high-end comfort in a coach that’s just under 39 feet long. It’s the shortest tag-axle in Newmar’s lineup, built on the SpartanⓇ K3 chassis with a 525-horsepower CumminsⓇ engine and 15,000-pound towing capacity. Headed cross-country or out for the weekend? No worries, this RV gives you the control, performance, and space to make every mile feel like home.

Inside and out, the Mountain Aire knows how to make an entrance. From premium finishes to smart tech, it provides everything travelers look for in a high-end motorhome. You can find the 2026 Mountain Aire now at Transwest RV in Colorado, where you can see it for yourself.

Specifications

Type: Class A
Year: 2026
Make: Newmar
Model: Mountain Aire
Submodel: 4118
Chassis Brand: Spartan
Stock ID: 17N253321
VIN (Last 6): 096164
List Price: $942,350
Status: Available
Condition: New
Living Quarters: No
Mileage: 665

Exterior

Number of Slide Outs: 3

Interior

Sleeping Capacity: 3

Systems

Generator Make: Onan
Black Water Capacity (gal): 60
Fresh Water Capacity (gal): 105
Gray Water Capacity (gal): 80

Dimensions & Weights

GVWR (lbs): 54,000

Engine & Chassis

Engine Make: Cummins
Fuel Capacity (gal): 150
Fuel Type: Diesel
Horse Power: 525

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 Dwayne Pinnell

RV Sales Representative at Transwest Truck Trailer RV of Belton

2026 Newmar Mountain Aire Features

Download the Brochure

Designed to impress

The Mountain Aire brings bold curb appeal with Newmar’s signature full-paint finish and the optional Onyx Package, which adds dark accents throughout. Dual power slide trays, a slide-out Dometic freezer with optional fridge upgrade, and lighted exterior storage make it both aesthetically pleasing and functional.
Pilot your ride

This coach is equipped with Newmar’s Comfort DriveⓇ steering system, providing a smooth and more controlled ride. The anti-glare digital dash displays vehicle information clearly, while a 360° stitched camera system improves visibility in tight turns and narrow spaces. Co-pilot controls feature a touchscreen display for clear navigation and camera views, making this setup ideal.
Room to relax

There’s tons of space to stretch out inside the Mountain Aire. The power theater seats feature hidden storage and illuminated cupholders, providing a cozy spot to kick back and relax. The Euro-style dinette features a hidden leaf extension and includes two folding chairs to seat extra guests comfortably.
A convenient kitchen

The Mountain Aire’s kitchen comes ready for meal prep, both inside and out. A portable dual-burner induction cooktop plugs in easily outdoors or on the counter, and a WhirlpoolⓇ convection microwave with built-in air fryer makes cooking easy. The single-basin sink is paired with solid-surface covers and cutting boards, and the dishwasher is tucked away.
Your bedroom retreat

In the back of the coach, the bedroom is spacious, bright, and is calling your name. A king-size bed with large nightstands features a built-in power station, while wardrobes with six full drawers provide ample storage. A SamsungⓇ Smart TV is positioned for easy viewing, and controls for lighting and shade are conveniently within arm’s reach.
Elevated bathrooms

This coach includes a spacious rear full bath and a convenient mid-ship half bath. In back, you’ll find a tiled shower with a rain-style head, built-in bench, extra headroom, and a water-saving system for off-grid travel. A stacked washer and dryer are also tucked into the rear. The half bath adds flexibility for guests.

Frequently Asked Questions

Who builds the Mountain Aire?

The 2026 Mountain Aire is built by Newmar, a trusted name in luxury motorhomes for more than 50 years.

What kind of engine does the Mountain Aire have?

The Mountain Aire is powered by a 525-horsepower Cummins X12 diesel engine with 1,695 lb-ft of torque, paired with a Spartan K3 tag-axle chassis.

Is the Mountain Aire a good fit for full-time RV living?

Absolutely! With home-grade appliances, plenty of storage space for your belongings, and a power-packed diesel engine, the Mountain Aire supports your full-time adventures on the road.

Our Customers Say It Best

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Explore the 2026 Mountain Aire at Transwest

Ready to experience the Mountain Aire difference? The 2026 Mountain Aire brings together power, comfort, and cutting-edge design in one unforgettable package. Browse our online inventory or visit us in person at Transwest.