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2005 Monaco Coach Diplomat recalls

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

2 recalls found in NHTSA data as of September 22, 2026

For the 2005 Monaco Coach Diplomat. These apply to the model and year, not to one particular vehicle: check your VIN to see whether yours is included and whether it has been repaired.

Has your Monaco Coach been repaired?

Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.

NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Monaco Coach dealer can also check your VIN. Recall repairs are free.

2005 Monaco Coach Diplomat recalls, newest first

December 23, 2004NHTSA 04V59800086 vehicles potentially affected

Equipment › Recreational vehicle/trailer › LPG systems › Water heater

Summary
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 could create a risk of migration of carbon monoxide into the interior of the motor home.
Consequence
Exposure of the occupants to carbon monoxide could result in injury or death.
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.

This recall on nhtsa.gov

September 13, 2004NHTSA 04V4410001,189 vehicles potentially affected

Engine and engine cooling › Engine › Diesel

Summary
On certain motorhomes equipped with cummins engines, oil can leak into the engine compartment from a crack in the cup plug.
Consequence
Oil leakage on a hot engine can result in an engine compartment fire, possibly resulting in injuries.
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. Owners should contact cummins customer assistance center at 1-800-343-7357 or monaco at 1-800-685-6545.

This recall on nhtsa.gov

Owner complaints

Owners have filed 1 complaint about the 2005 Monaco Coach Diplomat with NHTSA. Complaints are unverified reports from the public; NHTSA uses them to decide what to investigate.

Crashes reported
0
Fires reported
1
Injuries reported
0
Deaths reported
0

Most complained-about components

  1. Electrical system1

Other Monaco Coach Diplomat years

Other 2005 Monaco Coach models

Most recalled 2005 vehicles

  1. 2005 Honda Accord (24 recalls)
  2. 2005 Ford E-350 (16 recalls)
  3. 2005 IC CE (16 recalls)
  4. 2005 Thomas Built Buses SAF-T-Liner C2 (16 recalls)
  5. 2005 Honda Pilot (15 recalls)
All of 2005’s most recalled vehicles

Questions

Does the 2005 Monaco Coach Diplomat have any recalls?
2 recalls found in NHTSA data as of September 22, 2026, covering: equipment, engine and engine cooling. Recalls apply to the model and year; whether a particular vehicle is included, and whether it has been repaired, depends on its VIN.
How do I check if my 2005 Monaco Coach Diplomat recall has been fixed?
Enter your 17-character VIN at nhtsa.gov/recalls, or ask a Monaco Coach dealer. Recall repairs are free. NHTSA's VIN search doesn't list recalls that were already repaired.
How many complaints have owners filed about the 2005 Monaco Coach Diplomat?
1 complaint filed with NHTSA. Complaints are unverified reports from the public that NHTSA uses to decide what to investigate.