Monaco Coach Diplomat Recalls & Complaints by Model Year
NHTSA lists 20 safety recalls and 48 owner complaints across 13 model years of the Monaco Coach Diplomat (1998–2011). The most-complained-about year is 2000.
Pick your Monaco Coach Diplomat model year
What Monaco Coach Diplomat owners complain about
Across all model years, owners have filed 48 complaints with NHTSA. The 2000 model year has the most, with 14.
All Monaco Coach Diplomat recalls (20)
Every NHTSA safety campaign that lists a Monaco Coach Diplomat, most recent first, with the model years each one covers.
-
Electrical system
Navistar is recalling certain model year 2008-2010 beaver and certain model year 2009-2011 monaco, and certain model year 2009-2011 holiday rambler recreational vehicles, manufactured from october 25, 2007, through august 26, 2010, equipped with iota its-50r 50 amp automatic transfer switches. The iota its-50r 50 amp automatic transfer…
Remedy: Navistar will notify owners, and dealers will replace the iota its-50r transfer switch free of charge. The safety recall began on march 15, 2012. Owners may contact navistar at 1-800-448-7825.
-
Windshield (visibility)
Navistar is recalling certain model year 2009-2011 beaver, holiday rambler and monaco coach brand recreational vehicles manufactured from january 11, 2008, through april 15, 2011. See the above list for models. The front windshield shade may separate from the cabin body without warning, possibly impairing the driver's ability to see the…
Remedy: Navistar will notify owners, and dealers will inspect the shade mounting clips and repair the vehicles as necessary free of charge. The safety recall is expected to begin december 10, 2011.owners may contact navistar…
Model years: 2011
-
Recreational vehicle/trailer (equipment)
Navistar is recalling certain recreational vehicles equipped with 1200-series norcold refrigerators. The population of refrigerators being addressed contains either a sensing algorithm or thermal switch to shut off power to the refrigerator when high temperatures are detected in order to prevent a potential fire. The response times of…
Remedy: Navistar is working with norcold to identify and notify any affected owners. Owners will be instructed to contact norcold dealers to receive the remedy free of charge. Please see norcold's defect report 10e-049 for…
-
Equipment
Navistar is recalling certain vehicles equipped with dimplex electraflame, symphony, or optiflame branded electric fireplaces, stoves, and fireplace inserts. The plug in remote control receiver for the fireplace can overheat.
Remedy: Navistar is working with dimplex and dimplex will provide owners a free replacement plug-in remote control kit. The safety recall began during october 2011. Owners may contact dimplex north america customer service at…
Model years: 2010
-
Pedals and linkages (service brakes)
Kongsberg power products systems i, inc., (kpps) is recalling on behalf of monaco coach certain model year 2008-2010 motor homes manufactured after april 2007 and equipped with pneumatic and hydraulic adjustable brake pedal assemblies supplied by kpps. The drive pin which secures the brake pedal arm to the balance of the assembly may…
Remedy: Kpps will provide a clamp assembly kit along with installation instructions free of charge. The safety recall began on july 16, 2010. Owners may contact kpps at 1-877-485-6647.
-
Pedals and linkages (service brakes)
Navistar is recalling certain model year 2008-2009 beaver contessa, model year 2009 beaver marquis, patriot, monterey, model year 2009-2010 holiday rambler ambassador, model year 2010-2011 holiday rambler endeavor, model year 2009-2010 holiday rambler imperial, model year 2010 holiday rambler navigator, and sceptor, model year 2010…
Remedy: Navistar is working with kongsberg please see kongsberg defect report 09e-064. Navistar will receive kits and will inspect and install a c-clamp on the adjustable brake pedal. This service will be performed free of…
-
Recreational vehicle/trailer (equipment)
Monaco is recalling certain motor homes equipped with norcold refrigerators. A fatigue failure in the section of the cooling unit which contains the refrigerant could allow the liquid solution to slowly leak.
Remedy: Monaco is working with norcold to repair these refrigerators. Norcold will provide thermal switch kits to owners along with the necessary forms and instructions. The recall began on august 29, 2008. Owners may contact…
-
Linkages (visibility)
Monaco is recalling 1,733 my 2006-2007 diplomat and holiday rambler endeavor motor homes equipped with wiper systems supplied by am equipment. The drive motor link becomes disengaged during operation from the wiper drive arm where it attaches to the drive arm causing the wiper system to fail.
Remedy: Monaco will replace the complete under-the-hood wiper system with a new model, reusing the wiper arm and blades. The recall began on march 11, 2008. Owners may contact monaco at 1-800-685-6545.
-
Recreational vehicle/trailer (equipment)
On certain motor homes equipped with atwood sealed burner ranges, the range and slide-in burner tubes leading from the gas manifold to the burner heads had a depression or 'kink' in the exterior bend restricting proper airflow and gas mixture.
Remedy: Monaco is working with atwood to have the tubes replaced on these ranges. The recall began on december 14, 2007. Owners may contact atwood at 1-800-348-7418 or monaco at 1-800-685-6545.
-
Diesel (engine and engine cooling)
On certain motor homes built with cummins isl cm850 diesel engines, the connecting rod contains a machining defect in the wrist pin bushing of the rod that could cause a seizure of the piston pin.
Remedy: Monaco is working with cummins to recalibrate the engine control module and enhance the engine protection system enabling it to provide early detection of the failure mode and avoid more serious engine damage and…
-
Switch (exterior lighting)
On certain motor homes, the headlight switch in the front electrical box/firewall can overload.
Remedy: Dealers will install a new wiring harness. The recall began on september 30, 2005. Owners may contact monaco at 1-800-685-6545.
Model years: 2006
-
Water heater (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 could create a risk of migration of carbon monoxide into the interior of the motor home.
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.
Model years: 2005
-
Diesel (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. Owners should contact cummins customer assistance center at…
-
Labels (equipment)
On certain motor homes, the federal identification tag on both 36' and 38' models was incorrect. The initial tag shows the PSI as 90 lbs. Front and 100 lbs. Rear. The correct PSI is 105 front and 115 rear. Also, the federal identification tag on certain units incorrectly states that the unit was built with a tag axle.
Remedy: Owners will be provided with a correct federal identification tag and installation instructions. Owner notification began october 24, 2003. Owners should contact monaco at 1-800-685-6545.
Model years: 1999
-
Recreational vehicle/trailer (equipment)
On certain motorhomes, fifth wheels and travel trailers equipped with norcold refrigerator cooling units model numbers 1200lr and 1200rim, these refrigerators can experience low cycle fatigue failure which can lead to the liquid solution slowly leaking from the sealed, pressurized cooling unit through a small crack.
Remedy: Norcold will notify its customers and provide a replacement cooling unit free of charge. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a…
-
Labels (equipment)
On certain motor homes, the PSI recorded on the federal certification label is incorrect. The initial label shows PSI as 90 lbs front and 100 rear. The correct information should be a PSI of 105 front and 115 rear.
Remedy: Dealers will install a corrected label on these motor homes. Owner notification began on april 28, 2003. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free…
Model years: 1998
-
Service brakes, air: controls, pedals and linkages
On class a motor homes built with a steerable auxiliary axle and equipped with certain meritor-wabco brake system two and four port relay valves, the valve may stick open when a high-pressure brake application is released.
Remedy: Dealers will replace these valves. Meritor wabco is conducting the owner notification and remedy for this campaign. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not…
Model years: 2001
-
Buckle assembly (seat belts)
Vehicle description: class a motor homes equipped with safety belt assemblies built by am-safe. On some seat belts, the buckle and connector may unlatch during a collision.
Remedy: Dealers will inspect the lap belts and, if necessary, replace it with a new belt assembly. Am-safe is conducting the owner notification. Owners who take their vehicles to an authorized dealer on an agreed upon service…
-
Recreational vehicle/trailer (equipment)
Vehicle description: class a motor homes produced on roadmaster chassis. A 12vdc 50 amp MINI-breaker on the refrigerator supply wire rather than a 12 vdc 30 amp breaker.
Remedy: Dealers will replace the 12vdc 50 amp breaker with a 12vdc 30 amp breaker.
Model years: 2001
-
Mounting (fuel system)
Vehicle description: motor homes built on a roadmaster chassis. Inadequate bracing was used to secure the fuel tank. The brace could fail allowing one end of the fuel tank to loosen from its position and hang lower than the other end.
Remedy: Dealers will install an additional brace under the fuel tank.
Model years: 1998
Other Monaco Coach models
- Knight54 complaints
- Cayman40 complaints
- Monaco33 complaints
- Lapalma30 complaints
- Dynasty25 complaints
- Windsor21 complaints
- Signature13 complaints
- Camelot7 complaints
Source: NHTSA recall and complaint databases and EPA fuel economy data, October 2026. Complaint counts are owner reports to NHTSA, not verified defects. Recall counts are safety campaigns that list this model year; whether a particular car was already repaired depends on its VIN. How this data is compiled.