2006 Monaco Coach DIPLOMAT: complaints, problems and recalls
Explore the records behind recurring owner reports.
Key facts
4 owner complaints analyzed
3 distinct recall campaigns
17,250 mi median reported failure mileage
Scope: 2006 model year. Data snapshot: . 2 complaints include usable failure mileage.
Most common problems
Engine And Engine Cooling:Engine:Diesel is the most frequently named component, appearing in 2 of 4 complaints (50.0%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Fuel system concerns | 1 | 25.0% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Engine And Engine Cooling:Engine:Diesel | 2 |
| Engine And Engine Cooling | 1 |
| Fuel System, Gasoline:Fuel Injection System:Fuel Rail | 1 |
| Structure:Frame And Members | 1 |
Engine And Engine Cooling:Engine:Diesel: 2; Engine And Engine Cooling: 1; Fuel System, Gasoline:Fuel Injection System:Fuel Rail: 1; Structure:Frame And Members: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 2 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 2; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (2). 2 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2007 | 2 |
| 2008 | 1 |
| 2009 | 1 |
2007: 2; 2008: 1; 2009: 1
Pattern summary
Engine And Engine Cooling:Engine:Diesel leads the component reports. Fuel system concerns appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Examples from the source records
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 10200829 · 2007-08-26 (August 26, 2007)
WHILE TRAVELING IN MONTANA IN OUR 2006 MONACO DIPLOMAT MOTORHOME WITH THE CUMMINS ISL400 ENGINE A FUEL LEAK DEVELOPED IN THE ENGINE. THIS LEAK INVOLVED THE LINE FROM THE FUEL PUMP TO THE FUEL RAIL SPRAYING DIESEL FUEL ALL OVER THE ENGINE WHILE THE UNIT WAS RUNNING. MOTORHOME HAD TO BE TOWED 65 MILES TO BILLINGS, MT CUMMINS REPAIR FACILITY. A NEW FUEL LINE WAS INSTALLED, ALONG WITH A BRACKET WHICH IS NOW BEING INSTALLED ON THESE FAULTY LINES DUE TO THESE REPORTED FUEL LEAKS. NUMEROUS MOTORHOME OWNERS WITH THIS ENGINE HAVE REPORTED THIS POTENTIAL…
Owner-reported narrative. 12,500 miles reported. Look up ODI 10200829 at NHTSA ↗
Owner report 10201329 · 2007-08-31 (August 31, 2007)
RECALL BY CUMMINS ON ISL850 ENGINES INSTALLED ON 2006/7 MONACO MOTORHOMES. THE RECALL DOES NOT ADDRESS THE POSSIBLE ENGINE FAILURE ISSUE. IT ONLY PROTECTS THE ENGINE FROM BLOWING UP THUS SAVING CUMMINGS MONEY. THE CORRECT FIX SHOULD BE A NEW ENGINE WHICH WOULD NOT HAVE THE UNCERTAINTY OF ENGINE FAILURE CAUSING THE VEHICLE (MOTORHOME ) TO BE STRANDED. *TR UPDATED 09/18/07.*JB
Owner-reported narrative. Look up ODI 10201329 at NHTSA ↗
Owner report 10228390 · 2008-05-12 (May 12, 2008)
OWNER OF A 2006 40' MONACO DIPLOMAT RV MOTORHOME DELIVERED WITH A 400HP DIESEL ENGINE, MANUFACTURED BY CUMMINS INC. RECEIVED A RECALL NOTICE RE A POSSIBLE ENGINE FAILURE; HE IS REQUESTING HELP IN ORDERING CUMMINS TO INSTALL A PROPER MANUFACTURED ENGINE. *KB THE CONSUMER STATED THE REMEDY THE MANUFACTURING IS SUGGESTING IS A WARNING DEVICE NOT AN ACTUAL FIX TO THE PROBLEM. THE MANUFACTURED STATED THEY WOULD INSTALL A PRESSURE SENSOR IN THE CRANKCASE ESSENTIALLY TO WARN OF A PENDING ENGINE FAILURE.*JB
Owner-reported narrative. Look up ODI 10228390 at NHTSA ↗
Owner report 10295375 · 2009-12-11 (December 11, 2009)
MOTOR HOME BY MONACO BROKEN FRAME TRAILING ARMS. *TR
Owner-reported narrative. 22,000 miles reported. Look up ODI 10295375 at NHTSA ↗
Recall history
3 distinct campaigns affect this selection. Announcement dates below are different from vehicle model years. A campaign may cover multiple years.
05V366000 · Exterior Lighting:Headlights:Switch
Reported: 2005-08-24 (August 24, 2005)
ON CERTAIN MOTOR HOMES, THE HEADLIGHT SWITCH IN THE FRONT ELECTRICAL BOX/FIREWALL CAN OVERLOAD.
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.
NHTSA campaign record ↗07V311000 · Engine And Engine Cooling:Engine:Diesel
Reported: 2007-07-20 (July 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: 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.
NHTSA campaign record ↗08V070000 · Visibility:Windshield Wiper/Washer:Linkages
Reported: 2008-02-14 (February 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: 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.
NHTSA campaign record ↗