Newmar King Aire 4501

Name: Newmar King Aire 4501
Brand: Newmar

Class Abuilt 2015–15Better build tierRare on the used market

WHAT ONE COSTS

$471,700est. used (2015, 11 yr old)

Sticker was $919,485 in 2015. Out of production since 2015, so the used market is the only way to buy one. Estimate assumes a 2015 unit.

THE SPECS

Length44.9 ft

Height (incl. A/C)13.3 ft

Width8.5 ft

Interior height7.0 ft

GVWR54,000 lb

Dry weight46,200 lb

Cargo capacity7,800 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

2015Introduced; GCWR raised from 69,000 to 74,000 lb
2016Discontinued

FINDING ONE

Rare: a handful change hands a year, mostly between owners. Why: only one model year; 11 years out of 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

2015-only plan; GCWR jumped to 74,000 lb that year.

OTHER KING AIRE FLOORPLANS

4503 · 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 →

Find one for sale

Live listings for the 4501 on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

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

Is the 4501 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.