MYRModel Year Report

2005 Monaco Coach Diplomat

○ Not enough data
2005 Monaco Coach Diplomat
RENDERED 2026-08-02T11:32:23.860Z

Only 1 complaint on file — too few for a fair verdict.

This verdict reflects complaint volume compared to this model's typical year. Recalls and safety issues below apply regardless of the verdict — always check them.

Only 1 complaint on file — too few for a fair verdict. The data below is complete but unranked.

How is this computed?

COMPLAINTS PER YEAR

Complaints per year, Monaco Coach Diplomat Bar chart of distinct NHTSA complaints filed per model year, 2005 highlighted. 1998: 1 complaints 1998 1999: 10 complaints 2000: 14 complaints 2000 2001: 6 complaints 2002: 2 complaints 2002 2004: 4 complaints 2005: 1 complaints 2005 2006: 4 complaints 2007: 1 complaints 2007 2008: 2 complaints 2009: 1 complaints 2009 2010: 1 complaints 2011: 1 complaints 2011
2005: 1 complaints
View as data table
YearComplaints
19981
199910
200014
20016
20022
20044
20051
20064
20071
20082
20091
20101
20111

KNOWN PROBLEM AREAS

Only 1 complaint on file for this model year -- too few to rank by share. Raw counts only, below.

ELECTRICAL SYSTEM

1 of 1 total report mentions: electrical system.

FIRE
Show complaint excerpts

TL* THE CONTACT OWNS A 2005 MONACO COACH DIPLOMAT. WHILE EXAMING THE VEHICLE, THE CONTACT NOTICED THAT THE TRANSFER SWITCH HAD BURNED. THE VEHICLE WAS TAKEN TO A LOCAL DEALER, WHERE THE SURGE PROTECTOR WAS REPLACED.

NHTSA ODI report, 20120418

SAFETY TIMELINE

R 20050325 — equipment

ON CERTAIN MOTOR HOMES, THE WATER HEATER EXHAUST ON THE CURVE SIDE WALL UNDER THE BACK SIDE OF THE KITCHEN SLIDEOUT ROOM BOX TERMINATES UNDER THE SLIDE BOX WHEN IN THE EXTENDED POSITION. THIS DESIGN

Remedy: DEALERS WILL REPLACE THE WATER HEATER WITH A 16 GALLON ATWOOD UNIT THAT HAS A DIFFERENT EXHAUST TERMINATION. THE RECALL BEGAN MARCH 25, 2005. OWNERS SHOULD CONTACT MONACO AT 1-800-685-6545.

Campaign 04V598000 — check if this car was fixed

R Date not on file — engine and engine cooling

ON CERTAIN MOTORHOMES EQUIPPED WITH CUMMINS ENGINES, OIL CAN LEAK INTO THE ENGINE COMPARTMENT FROM A CRACK IN THE CUP PLUG.

Remedy: CUMMINS IS CONDUCTING THE OWNER NOTIFICATION AND REMEDY FOR THIS CAMPAIGN. CUMMINS WILL INSTALL A STEEL CUP PLUG BOSS CAP TO ALL AFFECTED ENGINES.

Campaign 04V441000 — check if this car was fixed

BUY-SMART CHECKLIST

2005 Monaco Coach Diplomat — pre-purchase inspection

  • Test/inspect for electrical system issues (1 reports on file for this year).
  • Verify recall 04V441000 (engine and engine cooling) has been completed.
  • Verify recall 04V598000 (equipment) has been completed.
Inspected by ______________ Date ______________

FAQ

Is the 2005 Monaco Coach Diplomat reliable?

There isn't enough NHTSA complaint data on file yet to give this model year a verdict.

What are the most common problems with the 2005 Monaco Coach Diplomat?

The most-reported component is electrical system, accounting for 100% of complaints on file.

How many recalls does the 2005 Monaco Coach Diplomat have?

2 recalls on file for this model year.

Data updated 2026-07-11 · Complaints are unverified owner reports filed with NHTSA, not independently verified defects. Methodology.