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Newmar King Aire 4531

Class Abuilt 2018– (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 weight49,980 lb
Cargo capacity4,020 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
201854,000 lb48,900 lb$1,717,120
2019–2054,000 lb49,300 lb$1,717,120
2021–2354,000 lb48,800 lb$1,717,120
2024–2554,000 lb49,800 lb$1,639,200
2026–54,000 lb49,980 lb$1,717,120
  • 2018Introduced with the X15 605 hp engine
  • 2022Chassis moved from Spartan K3 to Freightliner
  • 2023Fuel capacity 200 → 165 gal, interior height to 85.5 in.
  • 2024UVW to 49,800 lb
FINDING ONE

Patient search: weeks of watching, and probably some travel. Why: 9-year production run; 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

Nine straight model years — the anchor floor plan of the modern King Aire.

OTHER KING AIRE FLOORPLANS
Find one for sale

Live listings for the 4531 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 4531 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.