CamperHardlyKnowHer

Newmar Essex 4584

Class Abuilt 2017–17Better 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 weight47,200 lb
Cargo capacity6,800 lb
Sleeps4
Slide-outs3
Fresh water105 gal
Grey water80 gal
Black water60 gal
Air conditioning45,000 BTU
Fuel150 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
  • 2017Introduced
  • 2018Discontinued
FINDING ONE

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

THE READ

One-year-only 2017 plan shared with the King Aire that year.

OTHER ESSEX FLOORPLANS
4501 · 54,000 lb · sleeps 44503 · 54,000 lb · sleeps 44507 · 54,000 lb · sleeps 44513 · 54,000 lb · sleeps 44518 · 54,000 lb · sleeps 44519 · 54,000 lb · sleeps 44521 · 54,000 lb · sleeps 54531 · 54,000 lb · sleeps 44533 · 54,000 lb · sleeps 44534 · 54,000 lb · sleeps 44536 · 54,000 lb · sleeps 44537 · 54,000 lb · sleeps 44542 · 52,000 lb · sleeps 44543 · 54,000 lb · sleeps 4the whole line →
Is the 4584 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.