2004 Monaco Coach Diplomat Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2004 Monaco Coach Diplomat, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Body & structure220.0%
- Brakes220.0%
- Electrical220.0%
- Visibility220.0%
- Interior & seats110.0%
- Other / unspecified110.0%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Body & structure
Reports naming the vehicle structure, frame, body panels, doors, hood and trim.
From owner reports, verbatim
DT: THE CALLER HAS A PROBLEM WITH THE FRONT ROADSIDE SLIDE ON THE MOTOR HOME. THEY HAD IT IN FOR REPAIR 8 DIFFERENT TIMES, AND IT STILL IS NOT FIXED. TO DATE THE ROADSIDE SLIDE IS UNSTABLE. THE SLIDE IS OFF CENTER, AND A PERSON CAN PUT THEIR HAND IN THE BOTTOM OPENING TO THE SIDE. THEREFORE, THE SLIDE RIDES TOO HIGH AND CAUSES A LOUD WIND NOISE, A PERSON IS UNABLE TO HEAR THE TRAFFIC, AND THIS CAUSES DISTRACTION FOR THE DRIVER. ALSO, FEAR OF TURNING A CORNER AND CAUSING AN ACCIDENT. THE CAPTAIN'S DRIVER SEAT IS WOBBLING AT THE PEDESTAL, THE CALLER IS AFRAID THE SEAT WILL FALL OFF. WHEN APPLYING THE BRAKES THE RIGHT REAR SMOKES AND BELLOWS OUT AROUND THE WHEEL. THIS MOTOR HOME GCWR IS 39,300 POUNDS. THIS IS THE REASON WHY THIS MOTOR HOME IS UNSAFE. DIFFERENT DEALERS HAVE TRIED TO FIX THE ROADSIDE SLIDE, BUT NO ONE HAS BEEN ABLE TO DO SO. MANUFACTURER OFFERED THEM ANOTHER MOTOR HOME IF SHE PAID THE DIFFERENCE. THEY OFFERED THEM $5000.00 TO BRING IT TO ELKHART, INDIANA FOR REPAIRS. THE CALLER HAS HAD IT THERE TWO OTHER TIMES FOR THE SAME PROBLEM. THE CALLER SAID THE WORK WAS POORLY DONE UNDER THE WARRANTY. CALLER BELIEVES THIS IS A MANUFACTURER'S DEFECT. THE CALLER HAS HAD NUMEROUS ELECTRICAL PROBLEMS WITH MOTOR HOME.*AK *JB
DIPLOMAT 40PDQ 2004 MOTOR HOME, THE SLIDE WAS OFF CENTER AND STRIPS WERE NOT LINED UP PROPERLY. *BF THE SLIDE RIDES TO HIGH AND CAUSES SO MUCH WIND NOISE THAT THE CONSUMER WAS UNABLE TO HEAR OUTSIDE TRAFFIC. A GAP UNDER THE WINDOW ALLOWED WATER TO COMING INTO THE COACH. THE CAPTAIN DRIVER SEAT STARTED COMING APART AT THE PEDESTAL. WHEN APPLYING THE BRAKES SMOKE BILLOWED FROM THE REAR PASSENGER'S SIDE WHEEL. THE AIR CONDITIONER/HEAT PUMP KICKED THE CIRCUIT BREAKER. THE WINDSHIELD LEAKED IN THE CENTER ONTO THE DASH. CB GROUND PROBLEM. THE WASHER AND DRYING DID NOT WORK PROPERLY. THE HOLDING TANK WOULD NOT REGISTER PROPERLY. MANY ATTEMPTS HAVE BEEN MADE TO REPAIR THE COACH BUT NONE HAVE BEEN SUCCESSFUL. THE CONSUMER WOULD LIKE A FULL REFUND OF ALL MONEY PLUS ATTORNEY FEES OR A NEW COACH. NM
Too few reports in this category for a page of its own — they appear in the full complaint list.
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
DT: THE CALLER HAS A PROBLEM WITH THE FRONT ROADSIDE SLIDE ON THE MOTOR HOME. THEY HAD IT IN FOR REPAIR 8 DIFFERENT TIMES, AND IT STILL IS NOT FIXED. TO DATE THE ROADSIDE SLIDE IS UNSTABLE. THE SLIDE IS OFF CENTER, AND A PERSON CAN PUT THEIR HAND IN THE BOTTOM OPENING TO THE SIDE. THEREFORE, THE SLIDE RIDES TOO HIGH AND CAUSES A LOUD WIND NOISE, A PERSON IS UNABLE TO HEAR THE TRAFFIC, AND THIS CAUSES DISTRACTION FOR THE DRIVER. ALSO, FEAR OF TURNING A CORNER AND CAUSING AN ACCIDENT. THE CAPTAIN'S DRIVER SEAT IS WOBBLING AT THE PEDESTAL, THE CALLER IS AFRAID THE SEAT WILL FALL OFF. WHEN APPLYING THE BRAKES THE RIGHT REAR SMOKES AND BELLOWS OUT AROUND THE WHEEL. THIS MOTOR HOME GCWR IS 39,300 POUNDS. THIS IS THE REASON WHY THIS MOTOR HOME IS UNSAFE. DIFFERENT DEALERS HAVE TRIED TO FIX THE ROADSIDE SLIDE, BUT NO ONE HAS BEEN ABLE TO DO SO. MANUFACTURER OFFERED THEM ANOTHER MOTOR HOME IF SHE PAID THE DIFFERENCE. THEY OFFERED THEM $5000.00 TO BRING IT TO ELKHART, INDIANA FOR REPAIRS. THE CALLER HAS HAD IT THERE TWO OTHER TIMES FOR THE SAME PROBLEM. THE CALLER SAID THE WORK WAS POORLY DONE UNDER THE WARRANTY. CALLER BELIEVES THIS IS A MANUFACTURER'S DEFECT. THE CALLER HAS HAD NUMEROUS ELECTRICAL PROBLEMS WITH MOTOR HOME.*AK *JB
DIPLOMAT 40PDQ 2004 MOTOR HOME, THE SLIDE WAS OFF CENTER AND STRIPS WERE NOT LINED UP PROPERLY. *BF THE SLIDE RIDES TO HIGH AND CAUSES SO MUCH WIND NOISE THAT THE CONSUMER WAS UNABLE TO HEAR OUTSIDE TRAFFIC. A GAP UNDER THE WINDOW ALLOWED WATER TO COMING INTO THE COACH. THE CAPTAIN DRIVER SEAT STARTED COMING APART AT THE PEDESTAL. WHEN APPLYING THE BRAKES SMOKE BILLOWED FROM THE REAR PASSENGER'S SIDE WHEEL. THE AIR CONDITIONER/HEAT PUMP KICKED THE CIRCUIT BREAKER. THE WINDSHIELD LEAKED IN THE CENTER ONTO THE DASH. CB GROUND PROBLEM. THE WASHER AND DRYING DID NOT WORK PROPERLY. THE HOLDING TANK WOULD NOT REGISTER PROPERLY. MANY ATTEMPTS HAVE BEEN MADE TO REPAIR THE COACH BUT NONE HAVE BEEN SUCCESSFUL. THE CONSUMER WOULD LIKE A FULL REFUND OF ALL MONEY PLUS ATTORNEY FEES OR A NEW COACH. NM
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
DT: THE CALLER HAS A PROBLEM WITH THE FRONT ROADSIDE SLIDE ON THE MOTOR HOME. THEY HAD IT IN FOR REPAIR 8 DIFFERENT TIMES, AND IT STILL IS NOT FIXED. TO DATE THE ROADSIDE SLIDE IS UNSTABLE. THE SLIDE IS OFF CENTER, AND A PERSON CAN PUT THEIR HAND IN THE BOTTOM OPENING TO THE SIDE. THEREFORE, THE SLIDE RIDES TOO HIGH AND CAUSES A LOUD WIND NOISE, A PERSON IS UNABLE TO HEAR THE TRAFFIC, AND THIS CAUSES DISTRACTION FOR THE DRIVER. ALSO, FEAR OF TURNING A CORNER AND CAUSING AN ACCIDENT. THE CAPTAIN'S DRIVER SEAT IS WOBBLING AT THE PEDESTAL, THE CALLER IS AFRAID THE SEAT WILL FALL OFF. WHEN APPLYING THE BRAKES THE RIGHT REAR SMOKES AND BELLOWS OUT AROUND THE WHEEL. THIS MOTOR HOME GCWR IS 39,300 POUNDS. THIS IS THE REASON WHY THIS MOTOR HOME IS UNSAFE. DIFFERENT DEALERS HAVE TRIED TO FIX THE ROADSIDE SLIDE, BUT NO ONE HAS BEEN ABLE TO DO SO. MANUFACTURER OFFERED THEM ANOTHER MOTOR HOME IF SHE PAID THE DIFFERENCE. THEY OFFERED THEM $5000.00 TO BRING IT TO ELKHART, INDIANA FOR REPAIRS. THE CALLER HAS HAD IT THERE TWO OTHER TIMES FOR THE SAME PROBLEM. THE CALLER SAID THE WORK WAS POORLY DONE UNDER THE WARRANTY. CALLER BELIEVES THIS IS A MANUFACTURER'S DEFECT. THE CALLER HAS HAD NUMEROUS ELECTRICAL PROBLEMS WITH MOTOR HOME.*AK *JB
DIPLOMAT 40PDQ 2004 MOTOR HOME, THE SLIDE WAS OFF CENTER AND STRIPS WERE NOT LINED UP PROPERLY. *BF THE SLIDE RIDES TO HIGH AND CAUSES SO MUCH WIND NOISE THAT THE CONSUMER WAS UNABLE TO HEAR OUTSIDE TRAFFIC. A GAP UNDER THE WINDOW ALLOWED WATER TO COMING INTO THE COACH. THE CAPTAIN DRIVER SEAT STARTED COMING APART AT THE PEDESTAL. WHEN APPLYING THE BRAKES SMOKE BILLOWED FROM THE REAR PASSENGER'S SIDE WHEEL. THE AIR CONDITIONER/HEAT PUMP KICKED THE CIRCUIT BREAKER. THE WINDSHIELD LEAKED IN THE CENTER ONTO THE DASH. CB GROUND PROBLEM. THE WASHER AND DRYING DID NOT WORK PROPERLY. THE HOLDING TANK WOULD NOT REGISTER PROPERLY. MANY ATTEMPTS HAVE BEEN MADE TO REPAIR THE COACH BUT NONE HAVE BEEN SUCCESSFUL. THE CONSUMER WOULD LIKE A FULL REFUND OF ALL MONEY PLUS ATTORNEY FEES OR A NEW COACH. NM
Too few reports in this category for a page of its own — they appear in the full complaint list.
Visibility
Reports naming windshields, glass, wipers, defrosters and mirrors.
From owner reports, verbatim
DEFROSTER NOT WORKING WINDSHIELDD ICED OVER WHEN DRIVING FROM SNOW. WHEN STOPED DEFROSTER WILL OUTPUT ENOUGH HEAT TO MELT ICE. HEATER DEFROSTER IS SUB STANDARD INSUFFICIENT HOT WATER FLOW FROM REAR MOUNTED DIESEL ENGINE TO HEATER CORE ABOUT 37FT.
DEFROSTER NOT WORKING WINDSHIELD ICED OVER WHEN DRIVING FROM SNOW AND FREEZING RAIN.WHEN STOPED DEFROSTER WILL OUTPUT ENOUGH HEAT TO MELT ICE. HEATER DEFROSTER IS SUB STANDARD.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
DT: THE CALLER HAS A PROBLEM WITH THE FRONT ROADSIDE SLIDE ON THE MOTOR HOME. THEY HAD IT IN FOR REPAIR 8 DIFFERENT TIMES, AND IT STILL IS NOT FIXED. TO DATE THE ROADSIDE SLIDE IS UNSTABLE. THE SLIDE IS OFF CENTER, AND A PERSON CAN PUT THEIR HAND IN THE BOTTOM OPENING TO THE SIDE. THEREFORE, THE SLIDE RIDES TOO HIGH AND CAUSES A LOUD WIND NOISE, A PERSON IS UNABLE TO HEAR THE TRAFFIC, AND THIS CAUSES DISTRACTION FOR THE DRIVER. ALSO, FEAR OF TURNING A CORNER AND CAUSING AN ACCIDENT. THE CAPTAIN'S DRIVER SEAT IS WOBBLING AT THE PEDESTAL, THE CALLER IS AFRAID THE SEAT WILL FALL OFF. WHEN APPLYING THE BRAKES THE RIGHT REAR SMOKES AND BELLOWS OUT AROUND THE WHEEL. THIS MOTOR HOME GCWR IS 39,300 POUNDS. THIS IS THE REASON WHY THIS MOTOR HOME IS UNSAFE. DIFFERENT DEALERS HAVE TRIED TO FIX THE ROADSIDE SLIDE, BUT NO ONE HAS BEEN ABLE TO DO SO. MANUFACTURER OFFERED THEM ANOTHER MOTOR HOME IF SHE PAID THE DIFFERENCE. THEY OFFERED THEM $5000.00 TO BRING IT TO ELKHART, INDIANA FOR REPAIRS. THE CALLER HAS HAD IT THERE TWO OTHER TIMES FOR THE SAME PROBLEM. THE CALLER SAID THE WORK WAS POORLY DONE UNDER THE WARRANTY. CALLER BELIEVES THIS IS A MANUFACTURER'S DEFECT. THE CALLER HAS HAD NUMEROUS ELECTRICAL PROBLEMS WITH MOTOR HOME.*AK *JB
Too few reports in this category for a page of its own — they appear in the full complaint list.
Other / unspecified
Reports whose component NHTSA recorded as unknown, or that do not map to one of the categories above.
From owner reports, verbatim
DIPLOMAT 40PDQ 2004 MOTOR HOME, THE SLIDE WAS OFF CENTER AND STRIPS WERE NOT LINED UP PROPERLY. *BF THE SLIDE RIDES TO HIGH AND CAUSES SO MUCH WIND NOISE THAT THE CONSUMER WAS UNABLE TO HEAR OUTSIDE TRAFFIC. A GAP UNDER THE WINDOW ALLOWED WATER TO COMING INTO THE COACH. THE CAPTAIN DRIVER SEAT STARTED COMING APART AT THE PEDESTAL. WHEN APPLYING THE BRAKES SMOKE BILLOWED FROM THE REAR PASSENGER'S SIDE WHEEL. THE AIR CONDITIONER/HEAT PUMP KICKED THE CIRCUIT BREAKER. THE WINDSHIELD LEAKED IN THE CENTER ONTO THE DASH. CB GROUND PROBLEM. THE WASHER AND DRYING DID NOT WORK PROPERLY. THE HOLDING TANK WOULD NOT REGISTER PROPERLY. MANY ATTEMPTS HAVE BEEN MADE TO REPAIR THE COACH BUT NONE HAVE BEEN SUCCESSFUL. THE CONSUMER WOULD LIKE A FULL REFUND OF ALL MONEY PLUS ATTORNEY FEES OR A NEW COACH. NM
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .