Newmar King Aire 4503

Name: Newmar King Aire 4503
Brand: Newmar

Class Abuilt 2015–16Better build tierScarce on the used market

WHAT ONE COSTS

—price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

THE SPECS

Length44.9 ft

Height (incl. A/C)13.3 ft

Width8.5 ft

Interior height7.0 ft

GVWR54,000 lb

Dry weight47,000 lb

Cargo capacity7,000 lb

Sleeps4

Slide-outs3

Fresh water140 gal

Grey water80 gal

Black water60 gal

Air conditioning45,000 BTU

Fuel200 gal

Engine / chassisCummins ISX15 600 hp diesel pusher · Spartan K3

GeneratorCummins Onan 12.5 kW diesel

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

WHERE PEOPLE SLEEP

1× Rear king bed(Permanent)72×80
1× Hide-a-bed sofa(Convertible)—

HOW IT'S BUILT — 4/5

WallsLaminated fiberglass

FrameSteel

RoofWalk-on

UnderbellyEnclosed

Newmar (Better tier): Newmar

YEAR BY YEAR — WHAT CHANGED

YEARS	GVWR	DRY	MSRP
2015	54,000 lb	46,400 lb	—
2016	54,000 lb	47,000 lb	—

2015Introduced
2016Grey tank to 80 gal, black to 60 gal
2017Discontinued

FINDING ONE

Scarce — months of watching; be ready to fly and drive it home. Why: only 2 model years; 10 years out of production. Estimated from build volume and production span — not a count of live listings.

THE READ

Two-year plan across the 2016 tank revision.

OTHER KING AIRE FLOORPLANS

4501 · 54,000 lb · sleeps 4 4507 · 54,000 lb · sleeps 4 4513 · 54,000 lb · sleeps 4 4518 · 54,000 lb · sleeps 4 4519 · 54,000 lb · sleeps 4 4521 · 54,000 lb · sleeps 5 4531 · 54,000 lb · sleeps 5 4533 · 54,000 lb · sleeps 4 4534 · 54,000 lb · sleeps 4 4536 · 54,000 lb · sleeps 4 4537 · 54,000 lb · sleeps 4 4540 · 54,000 lb · sleeps 7 4546 · 54,000 lb · sleeps 4 4549 · 54,000 lb · sleeps 4 the whole line →

Is the 4503 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 and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

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