CamperHardlyKnowHer

Monaco Diplomat 43D

Class Abuilt 2017–17Mixed build tierScarce on the used market
WHAT ONE COSTS
$238,700est. used (2017, 9 yr old)

Sticker was $417,272 in 2017 — out of production since 2017, so the used market is the only way to buy one. Estimate assumes a 2017 unit.

THE SPECS
Length43.8 ft
Height (incl. A/C)12.9 ft
Width8.5 ft
Interior height7.0 ft
GVWR44,600 lb
Dry weightnot published
Sleeps6
Fresh water100 gal
Grey water60 gal
Black water40 gal
Fuel150 gal
Engine / chassisCummins ISL 450 hp / Roadmaster tag-axle chassis, Allison 6-speed
GeneratorOnan 8.0 kW Quiet Diesel

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

WHERE PEOPLE SLEEP
  • 1× Master king bed(Permanent)—
  • 2× Convertible sofa beds(Convertible)—
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Monaco (Mixed tier): Monaco Coach Corp (2005-2009), Navistar RV (2010-2013), REV Recreation Group (2014-2017)

YEAR BY YEAR — WHAT CHANGED
  • 2017Introduced
  • 2017Last model year
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

Final-year plan; dimensions carried from the shared 2017 Diplomat platform rather than a per-plan sheet.

OTHER DIPLOMAT FLOORPLANS
36SKT · 33,000 lb · sleeps 438PDD · 33,000 lb · sleeps 438PDQ · 33,000 lb · sleeps 640DST · 33,000 lb · sleeps 440PAQ · 33,000 lb · sleeps 440PDQ · 36,000 lb · sleeps 840PRQ · 33,000 lb · sleeps 641PDQ · 36,000 lb · sleeps 841SKQ · 36,000 lb · sleeps 843DF · 44,600 lb · sleeps 843DFT · 43,000 lb · sleeps 843G · 44,600 lb · sleeps 643P · 44,600 lb · sleeps 643PDQ · 43,000 lb · sleeps 8the whole line →
Is the 43D 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 dealer and aggregator listings, retrieved 2026-07.