Monaco Diplomat 43D

Name: Monaco Diplomat 43D
Brand: Monaco

Class Abuilt 2017–17Mixed build tierScarce on the used market

WHAT ONE COSTS

$233,300est. 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.

OUR TAKE

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 4 38PDD · 33,000 lb · sleeps 4 38PDQ · 33,000 lb · sleeps 6 40DST · 33,000 lb · sleeps 4 40PAQ · 33,000 lb · sleeps 4 40PDQ · 36,000 lb · sleeps 8 40PRQ · 33,000 lb · sleeps 6 41PDQ · 36,000 lb · sleeps 8 41SKQ · 36,000 lb · sleeps 8 43DF · 44,600 lb · sleeps 8 43DFT · 43,000 lb · sleeps 8 43G · 44,600 lb · sleeps 6 43P · 44,600 lb · sleeps 6 43PDQ · 43,000 lb · sleeps 8 the whole line →

Find one for sale

Live listings for the 43D 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 Diplomat 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, 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 dealer and aggregator listings, retrieved 2026-07.