Newmar Mountain Aire 4543

Name: Newmar Mountain Aire 4543
Brand: Newmar

Class Abuilt 2019–22Better build tierPatient search on the used market

WHAT ONE COSTS

$408,400est. used (2022, 4 yr old)

Sticker was $681,199 in 2022. Out of production since 2022, so the used market is the only way to buy one. Estimate assumes a 2022 unit.

THE SPECS

Length44.8 ft

Height (incl. A/C)13.2 ft

Width8.5 ft

Interior height6.9 ft

GVWR54,000 lb

Dry weight45,500 lb

Sleeps5

Fresh water105 gal

Grey water80 gal

Black water60 gal

Fuel150 gal

GeneratorCummins Onan 12.5 kW diesel

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

WHERE PEOPLE SLEEP

1× king bed(Permanent)—
1× convertible dinette(Convertible)—
1× sofa sleeper(Convertible)—

HOW IT'S BUILT: 4/5

WallsLaminated fiberglass

FrameSteel

RoofWalk-on

UnderbellyEnclosed

Newmar (Better tier): Newmar Mountain Aire

YEAR BY YEAR: WHAT CHANGED

YEARS	GVWR	DRY	MSRP
2019	54,000 lb	46,200 lb	$681,199
2020–22	54,000 lb	45,500 lb	$681,199

2019Introduced with the Cummins ISX 500 hp
2020Grey capacity 65 to 80 gal, black 45 to 60 gal
2023Dropped

FINDING ONE

Patient search: weeks of watching, and probably some travel. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Four-year 45-footer spanning the 2019-2022 lineups.

OTHER MOUNTAIN AIRE FLOORPLANS

3823 · 54,000 lb · sleeps 5 3825 · 54,000 lb · sleeps 4 4002 · 54,000 lb · sleeps 5 4018 · 54,000 lb · sleeps 5 4118 · 54,000 lb · sleeps 5 4360 · 44,600 lb · sleeps 5 4361 · 44,600 lb · sleeps 5 4364 · 44,600 lb · sleeps 5 4369 · 44,600 lb · sleeps 5 4372 · 44,600 lb · sleeps 5 4501 · 53,000 lb · sleeps 5 4503 · 53,000 lb · sleeps 5 4513 · 54,000 lb · sleeps 5 4519 · 54,000 lb · sleeps 5 the whole line →

Find one for sale

Live listings for the 4543 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 Mountain Aire line ↗

Is the 4543 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.