New 2025 Mountain Aire 4551 Motor Home Class A - Diesel

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Mountain Aire 4551 Description

Newmar Mountain Aire Class A diesel motorhome 4551 highlights:

  • Bath and a Half
  • Two Sofas
  • King Bed
  • Whirlpool Refrigerator
  • Hide-A-Leaf Dinette

 

Come see how much luxury is all throughout this motorhome! The master suite has a king bed slide for a good night's rest across from a dresser with a Samsung LED TV and a safe for your valuables. Attached to the bedroom is your very own full rear bathroom which has a 50" x 34" shower with a seat, a dual sink vanity for two to get ready at once, a large wardrobe with sliding doors and adjustable shelves, an emergency exit door behind the toilet, and even a Splendide washer and dryer. The chef will have everything they need to prepare delicious home cooked meals including a cabinet pull-out, a stainless steel 30" convection microwave with air fryer feature and a Whirlpool 19.7 cu. ft. refrigerator to keep the perishables fresh, plus the half bathroom is by the kitchen for quick bathroom breaks while cooking. Enjoy your meals at the hide-a-leaf dinette and relax on either the 87" hide-a-bed sofa or the 68" jackknife sofa while watching your favorite movies on the Samsung LED TV on power lift!

 

Explore the world in peak luxury with any one of these Newmar Mountain Aire Class A diesel motorhomes! They are exclusively built on a Spartan K3 tag axle chassis with a 525 HP and 1,695 lb./ft. of torque to make them easy to drive. Their industry-exclusive full paint Masterpiece Finish comes in four different color options each of which will turn heads down the highway. Hydraulic leveling jacks make set up quick and easy, and the fiberglass roof with integrated gutter rail will help to keep water away from your unit. The aluminum-frame sidewalls and roof construction are covered by the gel-coated fiberglass exterior sidewalls, front, and rear caps. You will also find finer amenities, features, and options all throughout the interiors. Come find the best one for you today!

Mountain Aire 4551 Specifications

Sleeps 5
Slides 3
Length 44 ft 10 in
Ext Width 8 ft 6 in
Ext Height 13 ft 2 in
Int Height 6 ft 11 in
Interior Color Camden, Halstead, Sorrento, Winston
Exterior Color Imperial, Nespresso, Thundercloud, Twilight
Hitch Weight 15000 lbs
GVWR 54000 lbs
Dry Weight 44200 lbs
Cargo Capacity 9800 lbs
Fresh Water Capacity 105 gals
Grey Water Capacity 80 gals
Black Water Capacity 60 gals
Furnace BTU 50000 btu
Generator 12.5 Kw Cummins Onan Diesel
Fuel Type Diesel
Engine Cummins 11.9L
Chassis Spartan K3 Tag Axle
Horsepower 525 hp
Fuel Capacity 150 gals
Wheelbase 318 in
Available Beds King
Torque 1695 ft-lb
Refrigerator Type Whirlpool
Refrigerator Size 19.7 cu ft
Convection Cooking Yes
Cooktop Burners 2
Shower Size 50" x 34"
Number of Awnings 2
Axle Weight Front 20000 lbs
Axle Weight Rear 20000 lbs
Axle Weight Tag 14000 lbs
Water Heater Type Demand
AC BTU 45000 btu
TV Info LR Samsung LED TV, BR Samsung LED TV, Overhead 43" Samsung 4K LED TV
Awning Info Nova Power
Washer/Dryer Available Yes
Gross Combined Weight 69000 lbs
Shower Type Shower w/Seat
Electrical Service 50 amp

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ManuFacts

Newmar is a company built around the Christian faith, specifically the beginning of the Mennonite faith in 1525 under the guidance of Ulrich Zwingli, and the founding of the Amish fellowship under Jacob Amman in 1693.

 

At Newmar, we believe that a motor coach is more than just a vehicle, it’s a passport to countless hours of fun and a lifelong memories taken from quality time spent with family and friends.

 

For over 50 years, we’ve applied our principles to the creation of motor coaches that have allowed people all over the world to live the RV lifestyle. And we’ll continue to so for countless generations to come. It’s why we take pride in every rivet, weld, and mechanical function.