2025 Newmar King Aire 4521

Vehicle Photo
  • Clearance
  • Was: $1,721,381†
  • Sale Price: $1,204,995
  • Doc: $250
  • Finance Incentive: -$5,000
  • All-In Price: $1,200,245
  • No-Finance Incentive Price: $1,205,245 Includes freight & doc fees with no finance discount
  • As Low As: $8,175 /mo (Edit)
Stock #: 113054 Mileage: 31,000
Tampa, FL
  • Available
  • Pre-Owned
  • Class: Class A Diesel
  • Length: 44 ft 11in
  • Slides: 3
  • Fuel: Diesel
  • Engine: Cummins X15
  • Dry Weight: 49,200
  • Chassis: Spartan K3 Tag Axle
  • Sleeps: 5

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  • Bath and a Half
  • Outdoor Entertainment
  • Rear Bath
Floorplan
  • Available Beds King
  • Exterior Height 13 ft 4in
  • Exterior Width 8 ft 6in
  • Interior Height 7 ft 2in
  • Pin Weight 20,000 lbs
  • Gross Weight 54,000 lbs
  • Dry Weight 49,200 lbs
  • Generator 12.5kw
  • Torque 1950 ft lbs
  • Fuel Capacity 165 gal
  • Wheelbase 292 in
  • Fresh Water Capacity 105 gal
  • Grey Water Capacity 80 gal
  • Black Water Capacity 60 gal
  • Furnace BTU 85,000
  • Refrigerator Type Viking Stainless Steel w/French Door and Internal Ice Maker
  • Refrigerator Size 20
  • Cooktop Burners 2
  • Shower Size 50"" x 34
  • Shower Type Shower w/Seat
  • Number of Awnings 2
  • Electrical Service 50 amps
  • Washer/Dryer Available Yes
  • TV Info LR 55"" 8K QLED on Power Lift, Cab 43"" 4K QLED, BR 50"" 4K LED, Ext. 43"" 4K QLED

Newmar King Aire 4521 Class A Diesel Motorhome - Luxury That Travels With You

Experience the ultimate in luxury RV travel with the Newmar King Aire 4521 Class A diesel motorhome. Designed for travelers who expect exceptional comfort, premium craftsmanship, and impressive space, the King Aire 4521 delivers a first-class experience from the driver's seat to the bedroom. With a full-wall slide, two additional slides, a bath and a half, and upscale residential features throughout, this coach makes every journey feel like a luxury retreat.

Key Features

  • Bath and a half
  • Visionary tri-fold sofa
  • Swivel cab seats
  • King bed slide out
  • Kitchen pantry
  • Full-wall slide
  • Euro booth dinette
  • 50"" x 34"" shower with seat
  • Samsung two-piece stacked washer and 220 volt dryer
  • 19.8 cu. ft. refrigerator with 36"" French door
  • Wolf induction cooktop
  • Viking convection microwave
  • Lithium ion battery system
  • 12.5 kW Cummins Onan diesel generator

Step inside and discover an incredible amount of living space created by the full-wall slide and two additional slides. The main living area offers a Visionary tri-fold sofa and comfort lounge, providing comfortable seating and additional sleeping space when needed. The Euro booth dinette creates a welcoming place for meals, morning coffee, or relaxing with family and friends.

The kitchen is ready for serious cooking with an all-electric Wolf induction cooktop, stainless steel Viking convection microwave, and 19.8 cu. ft. refrigerator featuring a 36"" French door and internal ice maker. A convenient pantry provides additional storage for groceries and kitchen essentials.

Retreat to the spacious bedroom and enjoy the comfort of the king bed slide out. After a restful night, the rear bath makes getting ready for the day easy with a 50"" x 34"" shower with a seat, large sink with dual faucets, wardrobe with sliding doors, and Samsung stacked washer and 220 volt dryer. A second bathroom adds even more convenience for you and your guests.

The King Aire is built on a Spartan K3 tag axle chassis with Newmar's exclusive STAR Foundation for enhanced strength, durability, handling, and driving confidence. Swivel cab seats, Italian leather captain's chairs, Comfort Drive adaptive steering, an Xite dash radio, and wireless charging mats make the journey just as enjoyable as the destination.

Inside, luxury surrounds you with auto motion power shades, tile flooring, European-style hardwood cabinets, super polished quartz countertops, and full-tiled shower walls and floor. Electric radiant heat beneath the main floor tile adds another layer of comfort.

Advanced technology includes a lithium ion battery system, 12.5 kW Cummins Onan diesel generator, doorbell and camera system, and passive entry system. With traditional or contemporary exterior design options, four interior decor choices, and four hardwood stain options, you can customize your King Aire to match your personal style.

Why Choose Campers Inn of Louisville

At Campers Inn of Louisville, we are committed to helping you find an RV that fits your travel dreams and lifestyle. Our knowledgeable team, wide selection, competitive pricing, and dedication to customer service make the RV buying process simple and enjoyable. Our commitment continues after the sale with service and support you can trust.

The Newmar King Aire 4521 is more than a motorhome. It is a luxury

†Lazydays strives to ensure the accuracy of the information provided on this website. However, actual products, programs and services may differ materially from those on this site. Lazydays is not responsible for errors made in stated pricing or specifications. Specifications and availability subject to change without notice. Price, length, weight, or any other specifications cannot be relied upon. Buyers should verify and confirm all claims made on the website. Sale price includes all manufacturer discounts and rebates. All prices listed on this site exclude tax, tags and title fees. Applicable government fees, state taxes, dealer fees and emissions testing charges will be added to comply with state vehicle codes. Freight and prep costs are additional and vary by state. Contact Lazydays for complete details.

*90 Days – Payments can be deferred for 90 days with approved credit. Interest accrues from contract date. Financing terms subject to lender approval. Not valid with other offers. Actual products, programs and services may differ materially from those on this site. Lazydays is not responsible for errors made in stated pricing. Specifications and availability subject to change without notice. Document fees vary by location. See dealership for complete details.

**Lazydays believes the specifications on this site supplied by the manufacturer to be correct at the time posted. However, specifications, standard equipment, model availability, options, fabrics, and colors are subject to change without notice. Some equipment may be unavailable when a vehicle is built. Some vehicles are pictured with options, which may be available at extra cost or may not be available on some models. You should verify the equipment that is on all vehicles. If a new vehicle shown on this website is subject to an open safety recall, Lazydays cannot deliver the vehicle to you until the recall repair is completed. This is a requirement of federal law.

***The advertised discount contains a $5,000 finance incentive. Finance Incentive applies if financing for your RV purchase is obtained with assistance by Lazydays and placed with a third party lender. Terms and Conditions may apply. Contact our finance department for further details.

****Margaritaville offer valid for a limited time only at Lazydays RV of Tampa. Customers who purchase a new RV or complete a qualified service appointment (appointment must be booked and customer must show for the appointment) are eligible to receive a complimentary 3-day, 2-night stay at Camp Margaritaville RV Resort of Auburndale. Offer valid while supplies last. Promotion is non-transferable, has no cash value, and cannot be combined with other offers or promotions. Limit one promotional stay per customer, per transaction. Resort stay subject to availability and blackout dates may apply. Resort reservation must be made within 30 days of RV purchase or completed service appointment. Valid for Florida residents and legal U.S. residents only, 18 years or older. Additional terms and conditions may apply. Lazydays RV of Tampa reserves the right to modify or cancel this promotion at any time without notice. Void where prohibited by law.