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2006 Monaco Coach Diplomat
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all Diplomat years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 2 of 4 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Engine And Engine Cooling. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Fuel System, Gasoline. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Structure. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
0 crash reports0 fire reports0 injury reports
Structure complaints
1 reportsOfficial recalls
308V070000 · Visibility:windshield Wiper/washer:linkages
Feb 14, 2008
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.
Consequence & remedy
Consequence: WHEN THE WIPER SYSTEM FAILS, THE OPERATOR WILL HAVE REDUCED VISIBILITY WHICH COULD RESULT IN A CRASH.
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.
07V311000 · Engine And Engine Cooling:engine:diesel
Jul 20, 2007
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.
Consequence & remedy
Consequence: IF ALLOWED TO PROGRESS, THIS CAN LEAD TO ENGINE FAILURE WITH THE POSSIBILITY OF THE ROD RUPTURING THE LOCK CAVITY, OIL AND DEBRIS ON THE ROADWAY AND VEHICLE CRASH.
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 RESULTANT SAFETY HAZARD. CUMMINS WILL ALSO INSTALL A NEW VALVE COVER WITH A CRANKCASE PRESSURE SENSOR FREE OF CHARGE (PLEASE SEE 07E033). OWNERS MAY CONTACT CUMMINS AT 800-343-7357 OR MONACO AT 1-800-685-6545.
05V366000 · Exterior Lighting:headlights:switch
Aug 24, 2005
ON CERTAIN MOTOR HOMES, THE HEADLIGHT SWITCH IN THE FRONT ELECTRICAL BOX/FIREWALL CAN OVERLOAD.
Consequence & remedy
Consequence: CHANGES IN THE COMPONENT SUPPLIER RELAY REQUIREMENTS WITH AN UPDATED CONTROLLER WERE CAUSING THE HEADLIGHTS TO STOP FUNCTIONING WITHOUT WARNING. THIS COULD POTENTIALLY CAUSE A CRASH WHILE DRIVING AT NIGHT.
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-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.