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Newmar King Aire 4521

Class Abuilt 2023– (in production)Better build tierPatient search on the used market
WHAT ONE COSTS
$1,717,100MSRP today

Still in production. A used 2023 would run roughly $1,013,100.

THE SPECS
Length44.9 ft
Height (incl. A/C)13.3 ft
Width8.5 ft
Interior height7.1 ft
GVWR54,000 lb
Dry weight49,340 lb
Cargo capacity4,660 lb
Sleeps5
Slide-outs3
Fresh water105 gal
Grey water80 gal
Black water60 gal
Air conditioning45,000 BTU
Fuel165 gal
Engine / chassisCummins X15 605 hp diesel pusher · Freightliner tag-axle
GeneratorCummins Onan 12.5 kW diesel

A missing row means the maker never published that figure: unknown, not zero.

WHERE PEOPLE SLEEP
  • Rear king bed(Permanent)72×80
  • 84 in. hide-a-bed sofa(Convertible)
  • Dinette(Convertible)
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameSteel
RoofWalk-on
UnderbellyEnclosed

Newmar (Better tier): Newmar

YEAR BY YEAR: WHAT CHANGED
YEARSGVWRDRYMSRP
202354,000 lb48,800 lb$1,717,120
2024–2554,000 lb49,200 lb$1,639,040
2026–54,000 lb49,340 lb$1,717,120
  • 2023Introduced; fuel capacity cut from 200 to 165 gal, interior height to 85.5 in.
  • 2026MSRP $1,717,120
FINDING ONE

Patient search: weeks of watching, and probably some travel. Why: still in production; priced at the top of its maker’s range. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Bath-and-a-half couples plan; one of four current King Aire layouts.

OTHER KING AIRE FLOORPLANS
Find one for sale

Live listings for the 4521 on the big marketplaces. Each search opens pre-filled with this exact floorplan:

Inventory varies by site and day. Slim pickings? search the whole King Aire line ↗

Is the 4521 your #1, or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about. Set your priorities as sliders, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from manufacturer spec sheets, retrieved 2026-07.