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We do our best to keep listing details accurate, but pricing, specifications, and availability come from third-party sources and can change without notice. We can't guarantee accuracy, so please confirm the details with the dealer before making any decisions. See something inaccurate? Contact us.

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    1. Home
    2. Inventory
    3. 2025 Newmar King Aire 4521

    2025 Newmar King Aire 4521

    UsedClass A|31,000 mi|Stock #113054|Located at Campers Inn RV in Clarksville, IN
    $1,199,995$1,721,381
    Save $521,386

    Get more info

    2025 King Aire 4521

    2025 King Aire 4521
    I'm interested in
    Preferred contact method
    EmailPhone callText message

    The dealer sees only your first name and general area, not your full name, email, or phone. You'll chat through RV Envy and can share your info anytime.

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    RV Envy

    2025 Newmar King Aire 4521

    Used · Class A · 31,000 mi

    $1,199,995$1,721,381Save $521,386

    Campers Inn RV – Clarksville

    520 Marriott Dr

    Clarksville, IN 47129

    (812) 282-7718

    Stock #113054

    2025 Newmar King Aire 4521 floor plan

    Specifications

    Length44 ft 11 in
    Dry weight49,200 lbs
    Sleeps5 people
    Slideouts3
    Odometer31,000 miles

    Full specifications

    AC BTU45000 btu
    Available BedsKing
    Awning InfoGirard Nova Side w/Window Sensor, Remote Control & LED Lights
    Axle Weight Front20000 lbs
    Axle Weight Rear20000 lbs
    Axle Weight Tag14000 lbs
    Black Water Capacity60 gals
    Cargo Capacity4800 lbs
    ChassisSpartan K3 Tag Axle
    Convection CookingYes
    Cooktop Burners2
    Dry Weight49200 lbs
    Electrical Service50 amp
    EngineCummins X15
    Ext Height13 ft 4 in
    Ext Width8 ft 6 in
    Fresh Water Capacity105 gals
    Fuel Capacity165 gals
    Fuel TypeDiesel
    Furnace BTU85000 btu
    GVWR54000 lbs
    Generator12.5kw
    Grey Water Capacity80 gals
    Gross Combined Weight74000 lbs
    Hitch Weight20000 lbs
    Horsepower605 hp
    Int Height7 ft 2 in
    Length44 ft 11 in
    Mileage31,000 mi
    Miles31000
    Number of Awnings2
    Refrigerator Size19.8 cu ft
    Refrigerator TypeViking Stainless Steel w/French Door and Internal Ice Maker
    Shower Size50" x 34"
    Shower TypeShower w/Seat
    Sleeps5
    Slides3
    Solar Wattage400 watts
    TV InfoLR 55" 8K QLED on Power Lift, Cab 43" 4K QLED, BR 50" 4K LED, Ext. 43" 4K QLED
    Torque1950 ft-lb
    Washer/Dryer AvailableYes
    Water Heater TypeOasis
    Wheelbase292 in

    Options and equipment may differ from those listed. We do our best to ensure accuracy, but please confirm all details with the dealer before purchase.

    Get more info

    2025 King Aire 4521

    2025 King Aire 4521
    I'm interested in
    Preferred contact method
    EmailPhone callText message

    The dealer sees only your first name and general area, not your full name, email, or phone. You'll chat through RV Envy and can share your info anytime.

    We'll add you to our weekly newsletter too, but you can unsubscribe at anytime.

    Dealer information

    Campers Inn RV – Clarksville

    520 Marriott Dr
    Clarksville, IN 47129
    (812) 282-7718

    Experience the pinnacle of luxury travel with this custom 2025 Newmar King Aire 4521, a flagship Class A diesel motorhome designed for discerning travelers who demand uncompromising comfort, craftsmanship, and performance. Available from LazyDays powered by Camper's Inn, this extraordinary luxury RV delivers a first-class travel experience with premium amenities, cutting-edge technology, and elegant residential-style living.

    Built on a robust Spartan K3 chassis and powered by a high-performance Cummins diesel engine, the 2025 Newmar King Aire 4521 offers exceptional power, stability, and driving confidence for cross-country adventures. Advanced suspension and steering systems provide a smooth, refined ride, while state-of-the-art safety features help make every journey as comfortable as it is secure.

    Inside, the custom King Aire 4521 showcases Newmar’s renowned attention to detail with handcrafted cabinetry, premium finishes, designer furnishings, and sophisticated décor. The spacious floorplan creates an inviting atmosphere for extended travel, full-time RV living, or luxury vacationing. Expansive slide-outs maximize interior space, creating a residential feel that rivals upscale homes and luxury resorts.

    The gourmet kitchen is thoughtfully designed for travelers who appreciate fine dining on the road. High-end appliances, solid-surface countertops, abundant storage, and premium fixtures provide both beauty and functionality. Whether preparing a quick breakfast or entertaining guests, the kitchen delivers exceptional convenience and style.

    The elegant living area offers plush seating, advanced entertainment systems, and panoramic windows that fill the coach with natural light. Premium materials and carefully curated design elements create a relaxing environment perfect for unwinding after a day of exploration. Multiple entertainment options make it easy to enjoy movies, sporting events, or streaming content from virtually anywhere.

    The private master suite elevates luxury RV travel with a spacious bedroom, premium king-size bed, extensive wardrobe storage, and refined residential touches throughout. The spa-inspired bathroom features upscale fixtures, premium finishes, and a spacious shower designed to provide a relaxing retreat wherever your travels take you.

    Technology is seamlessly integrated throughout the 2025 Newmar King Aire 4521. Advanced control systems allow convenient management of lighting, climate, entertainment, and coach functions. High-end connectivity features support remote work, streaming, and staying connected while traveling across the country.

    Luxury extends beyond the interior with beautifully crafted exterior features designed for premium outdoor living. Generous storage compartments accommodate travel essentials, recreational gear, and personal belongings, while exterior entertainment and comfort features enhance every campsite experience.

    The custom 2025 Newmar King Aire 4521 represents the ultimate combination of luxury, innovation, and performance in the world of Class A diesel motorhomes. Whether you're planning extended cross-country journeys, seasonal travel, luxury RV resort stays, or full-time motorhome living, this exceptional coach delivers an unmatched level of comfort and sophistication.

    If you are searching for a luxury motorhome, premium Class A diesel coach, Newmar King Aire for sale, luxury RV for full-time travel, or a high-end recreational vehicle built for extraordinary adventures, this custom 2025 Newmar King Aire 4521 stands among the finest motorhomes available today. Contact LazyDays powered by Camper's Inn to learn more about this remarkable luxury RV and begin your next chapter of elevated travel.

    Options:

    • Lithium Power Package

    Experience the pinnacle of luxury travel with this custom 2025 Newmar King Aire 4521, a flagship Class A diesel motorhome designed for discerning travelers who demand uncompromising comfort, craftsmanship, and performance. Available from LazyDays powered by Camper's Inn, this extraordinary luxury RV delivers a first-class travel experience with premium amenities, cutting-edge technology, and elegant residential-style living.

    Built on a robust Spartan K3 chassis and powered by a high-performance Cummins diesel engine, the 2025 Newmar King Aire 4521 offers exceptional power, stability, and driving confidence for cross-country adventures. Advanced suspension and steering systems provide a smooth, refined ride, while state-of-the-art safety features help make every journey as comfortable as it is secure.

    Inside, the custom King Aire 4521 showcases Newmar’s renowned attention to detail with handcrafted cabinetry, premium finishes, designer furnishings, and sophisticated décor. The spacious floorplan creates an inviting atmosphere for extended travel, full-time RV living, or luxury vacationing. Expansive slide-outs maximize interior space, creating a residential feel that rivals upscale homes and luxury resorts.

    The gourmet kitchen is thoughtfully designed for travelers who appreciate fine dining on the road. High-end appliances, solid-surface countertops, abundant storage, and premium fixtures provide both beauty and functionality. Whether preparing a quick breakfast or entertaining guests, the kitchen delivers exceptional convenience and style.

    The elegant living area offers plush seating, advanced entertainment systems, and panoramic windows that fill the coach with natural light. Premium materials and carefully curated design elements create a relaxing environment perfect for unwinding after a day of exploration. Multiple entertainment options make it easy to enjoy movies, sporting events, or streaming content from virtually anywhere.

    The private master suite elevates luxury RV travel with a spacious bedroom, premium king-size bed, extensive wardrobe storage, and refined residential touches throughout. The spa-inspired bathroom features upscale fixtures, premium finishes, and a spacious shower designed to provide a relaxing retreat wherever your travels take you.

    Technology is seamlessly integrated throughout the 2025 Newmar King Aire 4521. Advanced control systems allow convenient management of lighting, climate, entertainment, and coach functions. High-end connectivity features support remote work, streaming, and staying connected while traveling across the country.

    Luxury extends beyond the interior with beautifully crafted exterior features designed for premium outdoor living. Generous storage compartments accommodate travel essentials, recreational gear, and personal belongings, while exterior entertainment and comfort features enhance every campsite experience.

    The custom 2025 Newmar King Aire 4521 represents the ultimate combination of luxury, innovation, and performance in the world of Class A diesel motorhomes. Whether you're planning extended cross-country journeys, seasonal travel, luxury RV resort stays, or full-time motorhome living, this exceptional coach delivers an unmatched level of comfort and sophistication.

    If you are searching for a luxury motorhome, premium Class A diesel coach, Newmar King Aire for sale, luxury RV for full-time travel, or a high-end recreational vehicle built for extraordinary adventures, this custom 2025 Newmar King Aire 4521 stands among the finest motorhomes available today. Contact LazyDays powered by Camper's Inn to learn more about this remarkable luxury RV and begin your next chapter of elevated travel.

    Options:

    • Lithium Power Package

    Specifications

    Length

    44 ft 11 in

    Dry weight

    49,200 lbs

    Sleeps

    5 people

    Slideouts

    3

    Odometer

    31,000 miles

    Specifications

    Length

    44 ft 11 in

    Dry weight

    49,200 lbs

    Sleeps

    5 people

    Slideouts

    3

    Odometer

    31,000 miles

    Download brochure
    Download brochure

    Unit features & options

    • Full-Paint Masterpiece Finish with Cut & Buff and Beta Fusion Protection on Front Cap
    • Convex Exterior Chrome Mirrors with Remote Control, Defrost, Turn Signals and Side View Cameras
    • Entrance Door with Automatic Step
    • Rear Hitch for Towing Car
    • Assist Handle at Entrance Door
    • Dual Latched Front Entrance Door with Power Flush Stepwell Cover
    • Mud Flaps
    • Rear Protective Tow Guard with Stainless Steel Newmar Name Cutout
    • Undercoating
    • Hydraulic Leveling Jacks
    • Stainless Steel Exterior Trim Pieces and Entrance Door Kick Panel
    • Holding Tank Levels Displayed in Exterior Water Works Compartment
    • Powered Door Lift for Engine Access
    • Two Power Pass Through Storage Trays with Access from Either Side with Two Storage Shelves per Tray
    • Ajar Warning for Generator Slide, Baggage Doors, Entry Door, Engine Door and Escape Door
    • Push Button Baggage Door Release, Keyless Entrance Door with Touch Pad & Door Bell
    • Self-Latching Soft Close Baggage Doors
    • Power Washer with 50’ Hose Reel Connected to Hot Water Line
    • Passive Entry System
    • Flag Pole Bracket
    • Fiberglass Roof and Integrated Gutter Rail
    • Gelcoated Fiberglass Exterior Sidewalls, Front and Rear Caps
    • Aluminum-Frame Sidewalls & Roof Construction, 16" on Center
    • 5/8" Foam Insulation Laminated in Sidewalls & Ceiling

    Unit features & options

    • Full-Paint Masterpiece Finish with Cut & Buff and Beta Fusion Protection on Front Cap
    • Convex Exterior Chrome Mirrors with Remote Control, Defrost, Turn Signals and Side View Cameras
    • Entrance Door with Automatic Step
    • Rear Hitch for Towing Car
    • Assist Handle at Entrance Door
    • Dual Latched Front Entrance Door with Power Flush Stepwell Cover
    • Mud Flaps
    • Rear Protective Tow Guard with Stainless Steel Newmar Name Cutout
    • Undercoating
    • Hydraulic Leveling Jacks
    • Stainless Steel Exterior Trim Pieces and Entrance Door Kick Panel
    • Holding Tank Levels Displayed in Exterior Water Works Compartment
    • Powered Door Lift for Engine Access
    • Two Power Pass Through Storage Trays with Access from Either Side with Two Storage Shelves per Tray
    • Ajar Warning for Generator Slide, Baggage Doors, Entry Door, Engine Door and Escape Door
    • Push Button Baggage Door Release, Keyless Entrance Door with Touch Pad & Door Bell
    • Self-Latching Soft Close Baggage Doors
    • Power Washer with 50’ Hose Reel Connected to Hot Water Line
    • Passive Entry System
    • Flag Pole Bracket
    • Fiberglass Roof and Integrated Gutter Rail
    • Gelcoated Fiberglass Exterior Sidewalls, Front and Rear Caps
    • Aluminum-Frame Sidewalls & Roof Construction, 16" on Center
    • 5/8" Foam Insulation Laminated in Sidewalls & Ceiling

    Full specifications

    As provided in the original listing

    AC BTU45000 btu
    Available BedsKing
    Awning InfoGirard Nova Side w/Window Sensor, Remote Control & LED Lights
    Axle Weight Front20000 lbs
    Axle Weight Rear20000 lbs
    Axle Weight Tag14000 lbs
    Black Water Capacity60 gals
    Cargo Capacity4800 lbs
    ChassisSpartan K3 Tag Axle
    Convection CookingYes
    Cooktop Burners2
    Dry Weight49200 lbs
    Electrical Service50 amp
    EngineCummins X15
    Ext Height13 ft 4 in
    Ext Width8 ft 6 in
    Fresh Water Capacity105 gals
    Fuel Capacity165 gals
    Fuel TypeDiesel
    Furnace BTU85000 btu
    GVWR54000 lbs
    Generator12.5kw
    Grey Water Capacity80 gals
    Gross Combined Weight74000 lbs
    Hitch Weight20000 lbs
    Horsepower605 hp
    Int Height7 ft 2 in
    Length44 ft 11 in
    Mileage31,000 mi
    Miles31000
    Number of Awnings2
    Refrigerator Size19.8 cu ft
    Refrigerator TypeViking Stainless Steel w/French Door and Internal Ice Maker
    Shower Size50" x 34"
    Shower TypeShower w/Seat
    Sleeps5
    Slides3
    Solar Wattage400 watts
    TV InfoLR 55" 8K QLED on Power Lift, Cab 43" 4K QLED, BR 50" 4K LED, Ext. 43" 4K QLED
    Torque1950 ft-lb
    Washer/Dryer AvailableYes
    Water Heater TypeOasis
    Wheelbase292 in

    Full specifications

    As provided in the original listing

    AC BTU45000 btu
    Available BedsKing
    Awning InfoGirard Nova Side w/Window Sensor, Remote Control & LED Lights
    Axle Weight Front20000 lbs
    Axle Weight Rear20000 lbs
    Axle Weight Tag14000 lbs
    Black Water Capacity60 gals
    Cargo Capacity4800 lbs
    ChassisSpartan K3 Tag Axle
    Convection CookingYes
    Cooktop Burners2
    Dry Weight49200 lbs
    Electrical Service50 amp
    EngineCummins X15
    Ext Height13 ft 4 in
    Ext Width8 ft 6 in
    Fresh Water Capacity105 gals
    Fuel Capacity165 gals
    Fuel TypeDiesel
    Furnace BTU85000 btu
    GVWR54000 lbs
    Generator12.5kw
    Grey Water Capacity80 gals
    Gross Combined Weight74000 lbs
    Hitch Weight20000 lbs
    Horsepower605 hp
    Int Height7 ft 2 in
    Length44 ft 11 in
    Mileage31,000 mi
    Miles31000
    Number of Awnings2
    Refrigerator Size19.8 cu ft
    Refrigerator TypeViking Stainless Steel w/French Door and Internal Ice Maker
    Shower Size50" x 34"
    Shower TypeShower w/Seat
    Sleeps5
    Slides3
    Solar Wattage400 watts
    TV InfoLR 55" 8K QLED on Power Lift, Cab 43" 4K QLED, BR 50" 4K LED, Ext. 43" 4K QLED
    Torque1950 ft-lb
    Washer/Dryer AvailableYes
    Water Heater TypeOasis
    Wheelbase292 in

    Price history

    Days listed

    154

    Price drops

    1

    Total price reduction

    -$49,005

    Sign in to see 2 price changes

    Price history

    Days listed

    154

    Price drops

    1

    Total price reduction

    -$49,005

    Sign in to see 2 price changes