RoadVitals

2006 Monaco Coach Diplomat

Recalls, owner-reported complaints, investigations and safety data

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
4
Latest Dec 11, 2009
Safety recallsA safety recall is issued when a manufacturer or NHTSA determines that a vehicle has a safety-related defect or does not comply with a federal motor vehicle safety standard. Recall repairs are free. Whether a specific vehicle is covered depends on its VIN — a recall listed for a model year does not necessarily apply to every vehicle of that year.
3
Latest Feb 14, 2008
InvestigationsNHTSA opens an investigation to examine whether a safety defect may exist. An open investigation is not a determination that a defect exists, and many investigations close without a recall. Investigations can, however, lead to one.
0
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
0

Overview

Our database contains 4 NHTSA owner-reported complaints for the 2006 Monaco Coach Diplomat, most frequently naming the engine, body & structure and fuel system categories. 3 safety recalls have been issued covering this model year; and 1 manufacturer communication is on file.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

What owners report

Complaints grouped by the component NHTSA recorded

  • Engine360.0%
  • Body & structure120.0%
  • Fuel system120.0%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Safety recalls

3 campaigns cover this model year

Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.

Check a VIN on NHTSA.gov
08V070000

VISIBILITY:WINDSHIELD WIPER/WASHER:LINKAGES

Feb 14, 2008
1,733 units potentially affected
The defect: 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.
The risk: WHEN THE WIPER SYSTEM FAILS, THE OPERATOR WILL HAVE REDUCED VISIBILITY WHICH COULD RESULT IN A CRASH.
The 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.
MONACO COACH CORPORATIONManufacturer number R08005View on NHTSA.gov
07V311000

ENGINE AND ENGINE COOLING:ENGINE:DIESEL

Jul 20, 2007
747 units potentially affected
The defect: 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.
The risk: 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.
The 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.
MONACO COACH CORPORATIONManufacturer number R07007View on NHTSA.gov
05V366000

EXTERIOR LIGHTING:HEADLIGHTS:SWITCH

Aug 24, 2005
451 units potentially affected
The defect: ON CERTAIN MOTOR HOMES, THE HEADLIGHT SWITCH IN THE FRONT ELECTRICAL BOX/FIREWALL CAN OVERLOAD.
The risk: 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.
The remedy: DEALERS WILL INSTALL A NEW WIRING HARNESS. THE RECALL BEGAN ON SEPTEMBER 30, 2005. OWNERS MAY CONTACT MONACO AT 1-800-685-6545.
MONACO COACH CORPORATIONManufacturer number 505011View on NHTSA.gov

Recent owner complaints

Reports submitted to NHTSA, shown in the owner's own words

Body & structure
Filed Dec 11, 2009

MOTOR HOME BY MONACO BROKEN FRAME TRAILING ARMS. *TR

NHTSA ID
10295375
Incident
Nov 15, 2009
Mileage
22,000 mi
Engine
Filed 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

NHTSA ID
10228390
Incident
May 1, 2008
Engine
Filed Aug 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

NHTSA ID
10201329
Incident
Jul 20, 2007
EngineFuel system
Filed Aug 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 POTENTIALLY DANGEROUS SITUATION TO BOTH CUMMINS AND VARIOUS COACH MANUFACTURERS. OWNERS ARE OF THE OPINION THAT A RECALL SHOULD BE ISSUED FOR THESE ENGINES DUE TO THE POTENTIAL OF A CATASTROPHIC ENGINE FIRE DUE TO THESE LEAKS. DRIVERS OF THESE UNITS WOULD NOT EVEN BE AWARE OF A FIRE ON THE COACH SINCE THE ENGINE IS AT THE REAR OF THE VEHICLE. *TR

NHTSA ID
10200829
Incident
Jul 19, 2007
Mileage
12,500 mi

Manufacturer communications

A bulletin sent by a manufacturer to its dealers. Not a recall, and repairs are not necessarily free.

08-04-02

ENGINE AND ENGINE COOLING:ENGINE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL

MONACO COACH CORPORATION HAS BEEN ADVISED THAT CUMMINS INC. HAS INITIATED A SERVICE CAMPAIGN BULLETIN C0805 PERTAINING TO CERTAIN ISC AND ISL ENGINES. *PE

Manufacturers file copies of the bulletins they send to dealers with NHTSA. These often describe diagnostic or repair procedures for a known condition. They are not recalls: repairs described in a bulletin are usually only free if the vehicle is still under warranty or the manufacturer has extended coverage.

Compare model years

Complaint and recall counts across every year of this model

Monaco Coach Diplomat by model year
YearComplaintsRecallsInvestigationsIssue Index
2013000—
2011140—
2010150—
2009110—
2008220—
2007130—
2006Viewing430—
2005120—
2004410—
2002210—
2001640—
20001420—
19991030—
1998130—

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. Older model years have had longer for reports to accumulate.