Newmar Mountain Aire Motor Home Class A - Diesel RVs For Sale
The Mountain Aire Class A diesel motorhome by Newmar allows you to take luxury with you where you want to go! You can rest and relax inside from the cockpit to the cabin with features that provide the perfect combination of form and function.
The coaches offer on-site dining with a fully equipped kitchen featuring super polished solid-surface countertops and soft-close cabinet doors with beautifully crafted hardwood cabinetry, plus much more. Each is built exclusively on the Spartan® K3 tag axle chassis with 525 HP making it easy to travel up hills and while towing. Comfort Drive™ adaptive steering, Mobileye® lane tracking and departure system, tire pressure monitoring, electronic stability control, and OnGuard™ collision mitigation technology, along with additional advanced chassis features, provide safety on the road.
Why would you choose a Mountain Aire Class A diesel motorhome by Newmar to travel the country? Because you enjoy the finer things in life!
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Mountain Aire 3825
Newmar Mountain Aire Class A diesel motorhome 3825 highlights: Bath and a Half ... more about Mountain Aire 3825
Specifications
Sleeps 4 Slides 3 Length 38 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 41000 lbs Cargo Capacity 13000 lbs Fresh Water Capacity 105 gals Grey Water Capacity 80 gals Black Water Capacity 60 gals Furnace BTU 50000 btu Generator 10 Kw Cummins Onan Diesel Fuel Type Diesel Engine Cummins 11.9L Chassis Spartan K3 Tag Axle Horsepower 525 hp Fuel Capacity 150 gals Wheelbase 246 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 42" x 35" 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 30000 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 Angled Electrical Service 50 amp Solar Wattage 10 watts Similar Floorplans
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Mountain Aire 4118
Newmar Mountain Aire Class A diesel motorhome 4118 highlights: Bath and a Half ... more about Mountain Aire 4118
Specifications
Sleeps 5 Slides 3 Length 41 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 42500 lbs Cargo Capacity 11500 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 282 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 40" x 32" 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 Solar Wattage 10 watts Similar Floorplans
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Mountain Aire 3823
Newmar Mountain Aire Class A diesel motorhome 3823 highlights: Rear Private ... more about Mountain Aire 3823
Have a question about this floorplan? Contact Us
Specifications
Sleeps 5 Slides 4 Length 38 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 Blackthorn, Dillon, Emmons, Fairweather Hitch Weight 15000 lbs GVWR 54000 lbs Dry Weight 41000 lbs Cargo Capacity 13000 lbs Fresh Water Capacity 105 gals Grey Water Capacity 80 gals Black Water Capacity 60 gals Furnace BTU 50000 btu Generator 10 Kw Cummins Onan Diesel Fuel Type Diesel Engine Cummins 11.9L Chassis Spartan K3 Tag Axle Horsepower 525 hp Fuel Capacity 150 gals Wheelbase 246 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 44" x 30" 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 30000 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 Solar Wattage 10 watts Similar Floorplans
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Mountain Aire 4551
Newmar Mountain Aire Class A diesel motorhome 4551 highlights: Bath and a Half ... more about Mountain Aire 4551
Have a question about this floorplan? Contact Us
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 Similar Floorplans
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Mountain Aire 4595
Newmar Mountain Aire Class A diesel motorhome 4595 highlights: Bath and a Half ... more about Mountain Aire 4595
Have a question about this floorplan? Contact Us
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 40" x 32" 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 Awning Info Nova Power Washer/Dryer Available Yes Gross Combined Weight 69000 lbs Shower Type Shower w/Seat Electrical Service 50 amp Similar Floorplans
Mountain Aire Features:
Standard Features (2026)
Exterior
- Exterior Full-Paint Masterpiece Finish™ with Cut and Buff
- Power Chrome Baggage Door Locks, Keyless Entrance Door With Touchpad and Door Bell
- Entrance Door Assist Handle
- Entrance Door Automatic Step
- Convex Chrome Exterior Mirrors With Defrost, Remote Control, Turn Signal Indicators and Side View Cameras
- Front Cap Beta Fusion Protection
- Hydraulic Leveling Jacks
- Mud Flaps
- Newmar Badge Lighted In Front Grill
- Rear Hitch For Towing Car
- Stainless Steel Exterior Trim Pieces And Entrance Door Kick Panel
- Tow Guard Rear Protective With Stainless Newmar Name Cutout
- Undercoating
Optional
- Blackthorn Full Painted Exterior Graphics
- Dillon Full Painted Exterior Graphics
- Emmons Full Painted Exterior Graphics
- Fairweather Full Painted Exterior Graphics
- Special Order Exterior Colors - Must Also Order Awning Color Option
- Black Aluminum Powder Coat Trim Kit For Exterior Compartment Doors, Onyx Package
- Flag Pole Bracket
- Stainless Steel Trim Kit For Exterior Compartment Doors
- 24X56 Non-Power Storage Tray, Location - Bay 2 (Floor Plans 3823 & 3825)
- 24X56 Non-Power Storage Tray, Location - Bay 3 (Floor Plans 3823 & 3825)
- 24X58 Power Storage Tray, Location - Bay 2 (Floor Plans 3823 & 3825)
- 24X58 Power Storage Tray, Location - Bay 3 (Floor Plans 3823 & 3825)
- 26X90 Power Storage Tray, Location - Bay 2 (Floor Plan 4551)
- 26X91 Non-Power Storage Tray, Location - Bay 2 (Floor Plan 4551)
- 40X90 Power Storage Tray, Location - Bay 2 (Floor Plan 4118)
- 40X90 Power Storage Tray, Location - Bay 3 (Floor Plan 4551)
- 42X91 Non-Power Storage Tray, Location - Bay 2 (Floor Plan 4118)
- 42X91 Non-Power Storage Tray, Location - Bay 3 (Floor Plan 4551)
- 43X56 Non-Power Storage Tray, Location - Bay 3 (Floor Plan 4118)
- 43X56 Non-Power Storage Tray, Location - Bay 4 (Floor Plan 4551)
- Windshield Temporary Protection (For Transport Only)
Construction
- 16" On-Center Aluminum Frame Sidewalls and Roof Construction
- Egress Door With Ladder System
- Fiberglass Roof And Integrated Gutter Rail
- Foam Insulation 5/8" Laminated In Sidewalls & Ceiling
- Gelcoated Fiberglass Exterior Sidewalls, Front & Rear Caps
- Polar Pak R19 Batten Insulation In Roof
- Slideout Automatic Lock Arms On Non Hydraulic - Paddle Style
Chassis
- Air Leveling Control System
- Anti-Lock Braking System
- Auto Rain Sense Wipers
- Back-Up Alarm
- Battery Disconnect For Chassis Battery
- Cockpit Seat Belts Latch Sensors
- Cockpit Seat Occupancy Sensors
- Comfort Drive™ Adaptive Steering with Power Column and Adjustable Control
- Cruise Control
- Electronic Chassis Information Center In Dash
- Electronic Stability Control
- Engine Start Push Button
- Glass Dash Instrument Panel
- Automatic On/Off Headlights
- Mobileye® Lane Tracking and Departure System
- OnGuard™ Collision Mitigation Adaptive Cruise System with Adjustable Following DistanceControl
- Recessed Fuel Fills, With Cross Over To Fill From Either Side
- Seat Belt Warning Indicator In Dash Display
- Spartan® K3, Tag Axle, Tag Axle, 525 HP
- Nine Function Steering Wheel with Switch Pod In Center On Spartan® Chassis
- Tire Pressures Monitoring On Chassis
- Valid Digital Glare Free Dash On Spartan® Chassis
- Valor Generation 3 TPMS System on Spartan® Chassis
- Aluminum Wheels
Optional
- Blind Spot Detection
- Curt Spectrum Integrated Brake Control On Spartan® Chassis Only
- Spartan® K3, Tag Axle, Tag Axle, 525 HP, Onyx Package
Windows, Awnings, and Vents
- Fantastic Vent With Hardwood Louver Cover In Kitchen
- Fantastic Vent With Rain Sensor In Kitchen, Bathroom & Enclosed Stool Room
- Girard® Dual Nova Side Awnings, Slideout Covers, Entrance Door & Power Window Awnings
- Kitchen Window
- Skylight Above Shower (Not Available On Rear Bath Floor Plans)
- Power Window On Driver Side
- Frameless Double-Pane Tinted Safety Glass Windows
- Large Non-Ventilated Living Room And Dinette Windows
- One-Piece Tinted Windshield
Air Conditioning and Heating
- Two 15M Heat Pump Air Conditioner With Remote Control Thermostat On 38' Floor Plans
Electrical
- Accent Lights In Feature Ceiling, Lambrequins, Slideout Fascia Trim
- Automatic Generator Start On Low Battery Or Temperature Setting
- Battery Disconnect Switch For House Battery
- Cable TV Connection
- Dash Radio, Cameras And Monitors To Power Up From Both House Batteries & Ignition
- Recessed Docking Lights
- 50 Amp Electrical Service with Flexible Cord and Automatic Transfer Switch
- Emergency Engine Start Switch
- Energy Management System
- Engine Block Heater
- Exterior Security Lights, One Installed On Each Side
- Generator Start/Stop Function On Touchscreen In Water Bay Compartment
- Eight 6-Volt AGM House Batteries
- Interior Courtesy Lights
- 3000-Watt Pure Sine Inverter
- LED Lights In Exterior Storage Compartments On Automatic Switches
- LED Lights In Pull Out Pantry, Kitchen And Bathroom Base Cabinets
- LED Lights Installed Under Door Side Slideouts
- LED Lights Recessed In Ceiling & Underneath Overhead Cabinets
- LED Lights Installed Under Off Door Side Slideouts
- Lights In Wardrobes
- Midship Side Turn Signals
- Multiplex Electircal Wiring System
- Multiplex Lighting Control System
- 10.1" Multiplex Monitor System In Center Of Coach W/Interior Lighting & HVAC Controls
- Newmar App
- 10 kW Cummins Onan® Diesel Generator On 38' Floor Plans
- 12.5 kW Cummins Onan® Diesel Generator On 41' & 45' Floor Plans
- Power Rewind Reel With 50' Cord
- Reading Lights At Head Of Bed - Dimmable With Adjustable Aim
- 110V Recept In Bed Overhead With Two Pass Through Ports
- 12 Volt Recept Auxiliary On Dashboard
- Slideout Switch Manually Operated Hold To Run
- 10-Watt Solar Panel to Charge Chassis Battery
- Solar Prep with 6 Gauge Wire Ran from Roof to House Battery Compartment (N/A with L020 Option)
- Spare Fuses In Chassis Fuse Panel
- Spare Fuses In House Fuse Panel
- Transfer Switch With Surge Protector
- USB Outlet At Dash For Driver Use
- USB Outlet At Dinette & Bedroom Night Stand
- Wireless Charging Mat Built Into Passenger Console
- Wireless Phone Charger Pad In Driver Area
Optional
- 640 AHR Lithium Ion Battery System with Two 3000W Pure Sine Inverters
- 960 AHR Lithium Ion Battery System with Two 3000W Pure Sine Inverters
- Four Flexible 120-Watt Solar Panels on Roof
Plumbing & Bath
- Aqua Miser® Shower System
- Auto Fill For Fresh Water Tank
- Bladder Tank For Water Pump System
- Demand Water System
- Exterior Shower Located On Off Door Side
- Grey Holding Tank Rinse
- Hot Water Line To Generator Area
- Power Reel For Water Hose
- Sewage Holding Tank Rinse
- Shower Seat Fold Down
- Shower Soap Dispenser
- Shower Tiled Walls And Floors With Glass Door
- Dometic® 321 China Bowl or Macerator China Bowl Stool (Varies Per Floor Plan)
- Water Filter For Entire Unit
Optional
- Assist Handle in Shower
- RV Sanicon Turbo System
Interior
Cabinets and Furniture
- Sable Maple Hardwood Cabinets - Suede Finish
- Bed Base Power Incline Retract With R5 Air Mattress On 3825 Floor Plan
- Concealed Cabinet Door Hinges
- Concealed Cabinet Door Hinges Extended Rotation For Washer and Dryer
- Soft-Close Cabinet Doors (Side Hinge Doors Only)
- Cabinet Drawers With Dove Tail Sides With Self Closing Full Extension Ball Bearing Guides
- Flush Cooktop Cover, Matching Countertop Material
- Super Polished Solid-Surface Countertop In Bathroom And Bedroom
- Super Polished Solid-Surface Countertop In Kitchen, Undermounted Stainless Steel Sink & Sink Covers
- Dinette Euro Booth With 2 Table Leaves And 2 Folding Chairs
- Heated Driver & Passenger Seats Heated with Power Lumbar, Recline, Footrest & Standard Width Passenger Seat
- Driver & Passenger Seats with Power Headrest
- Driver Seat With Vibrator For Haptic Feedback
- Leather Sofa And Front Seats With Integrated Seat Belts
- Lifts On Bed Top
- Plush Pillow Top Mattress
- Molded Silverware Divider Tray
- Push-to-Release Pantry Drawer Slides
- Pull-Out Pantry Shelves (See Floor Plans For Availability)
- Pantry With Space For Serving Trays/Bakeware
- Side Hide-A-Bed Sofa with Memory Foam Mattress On Most Floor Plans
- Full-Height Wardrobe Beside Lav* (Floor Plan Specific)
- Optional
- Chestnut Maple Hardwood Cabinets - High Gloss Finish
- Chestnut Maple Hardwood Cabinets - Suede Finish
- Morel Maple Hardwood Cabinets - High Gloss Finish
- Morel Maple Hardwood Cabinets - Suede Finish
- Sable Maple Hardwood Cabinets - High Gloss Finish
- Sedona Maple Hardwood Cabinets - High Gloss Finish
- Sedona Maple Hardwood Cabinets - Suede Finish
- Summit Maple Hardwood Cabinets - High Gloss Finish
- Summit Maple Hardwood Cabinets - Suede Finish
- Two-Tone Summit/Chestnut Maple Hardwood Cabinets - High Gloss Finish
- Two-Tone Summit/Chestnut Maple Hardwood Cabinets - Suede Finish
- Two-Tone Summit/Morel Maple Hardwood Cabinets - High Gloss Finish
- Two-Tone Summit/Morel Maple Hardwood Cabinets - Suede Finish
- Two-Tone Summit/Sable Maple Hardwood Cabinets - High Gloss Finish
- Two-Tone Summit/Sable Maple Hardwood Cabinets - Suede Finish
- Two-Tone Summit/Sedona Maple Hardwood Cabinets - High Gloss Finish
- Two-Tone Summit/Sedona Maple Hardwood Cabinets - Suede Finish
- Combo Desk Dinette with Buffet Table, Two Fixed & Two Folding Chairs
- Convertible Dinette with Two Fixed & Two Folding Chairs That Face To Window Or Fore/Aft Seating
- Power Extenda Flex Dinette
- Air R5 Radius Corner Mattress
- Two Ottomans (Not Available With Theater Seating)
- Queen-Size Passenger Seat
- Two Recliners with Reading Lights And Lampstand
- Two Recliners with Reading Lights And Lampstand, 68" Trifold Sofa
- Two Recliners with Reading Lights And Lampstand, 74" Trifold Sofa
- 74" Theater Seating (Powered)
- 84" Theater Seating (Powered), 62" Trifold Sofa
- 87" Theater Seating (Powered), 68" Trifold Sofa
- 87" Theater Seating (Powered), 74" Trifold Sofa
Appliances
- 30” Stainless Steel Convection Microwave with Air Fryer Feature
- All Electric Cooktop Flush Mount Induction
- Air Horns
- 19.7 Cu. Ft. Whirlpool® Refrigerator
- Splendide Two-Piece Stacked Washer/Dryer
- 3.0 Cf Dometic Freezer on Pullout Tray in Exterior Baggage Compartment*
- Storage Shelf Above Freezer
- Central Vacuum with Tool Kit
Optional
- Dual-Zone Beverage Center
- Dishwasher In A Drawer With Stainless Steel Front Located Below Cooktop
Interior
- Auto Motion Power Shade At Windshield & Power Shades At Driver & Passenger Side Windows
- Auto Motion Power Window Shades & Lambrequins
- Fitted Non-Quilted Bedspread & Accent Pillows
- Designer Feature Ceiling With Cathedral Ceiling And Added Height (Rear Bath Floor Plans)
- Interior Passage Hardwood Raised Panel Doors
- Handle Flush On Swinging Bath Doors
- Interior Assist Handle At Main Entry Door
- Safe Located In Wardrobe
- Maximized Shoe Storage Shelves Recessed In Rear Of Wardrobe* (Floor Plan Specific)
- Tile Floor In Kitchen, Bathroom, Bedroom & Living Areas
- Waste Basket In Kitchen Base Under Sink
Optional
- Winston Interior Decor
- Camden Interior Decor
- Sorrento Interior Decor
- Halstead Interior Decor
Audio, Video & Accessories
Optional
- Two Camera Rear Prep For Use With Stacker Trailer
- Extra Monitor On Passenger Side
- SiriusXM® Radio Capability with Antenna (Does Not Include Monthly Subscription)
- Starlink Internet System
- Universal Toll Module
- WiFi Everest System with Aspen Interior Router
- Winegard® Automatic Open Face SWM Satellite Dish-DIRECTV® with HD & In Motion DIRECTV® Standard with Auto Stow & Dash Indicator
- Winegard® Automatic Open Face Satellite Dish & Winegard® In Motion - for DISH® with Auto Stow & Dash Indicator
- Winegard® Automatic Open Face Satellite Dish-For DISH® HD & Bell HD TV SK2-100 W/Auto Stow & Dash Indicator
- Winegard® Automatic Open Face Swm Satellite Dish-For DIRECTV® Standard/HD SK2-300 with Auto Stow & Dash Indicator
- Winegard® In Motion Dome Satellite Dish - For DISH® Standard/HD, DIRECTV® Standard & Bell Canada (RtI-20B)
See us for a complete list of features and available options!
All standard features and specifications are subject to change.
All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.
Due to the current environment, our features and options are subject to change due to material availability.
Manu-Facts:
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.