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: 1 of 1 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.
Fuel System, Diesel. 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
What owners actually said
1 reports
17,899 miles · Mar 9, 2007
Fuel System, Diesel
WHILE TRAVELING IN MY MOTOR HOME WITH A CUMMINS ISL-400 DIESEL ENGINE A HIGH PRESSURE FUEL LINE FEEDING THE COMMON RAIL INJECTOR SYSTEM CRACKED AND LEAKED FUEL THROUGHOUT THE ENGINE COMPARTMENT INCLUDING THE EXHAUST SYSTEM. WHEN REPAIRED AT THE CUMMINS SERVICE CENTER IN EL CAJON, CA, THEY SAID THAT THIS WAS A PROBLEM WITH THE IS…
Read full complaint
WHILE TRAVELING IN MY MOTOR HOME WITH A CUMMINS ISL-400 DIESEL ENGINE A HIGH PRESSURE FUEL LINE FEEDING THE COMMON RAIL INJECTOR SYSTEM CRACKED AND LEAKED FUEL THROUGHOUT THE ENGINE COMPARTMENT INCLUDING THE EXHAUST SYSTEM. WHEN REPAIRED AT THE CUMMINS SERVICE CENTER IN EL CAJON, CA, THEY SAID THAT THIS WAS A PROBLEM WITH THE ISL ENGINE AND THAT THERE WAS A "FIX" TO THE PROBLEM. AFTER REPLACING THE CRACKED FUEL LINE THEY ALSO INSTALLED A SUPPORT BRACKET FOR THE FUEL LIME THAT SHOULD PREVENT VIBRATIONS THUS ELIMINATING CRACKING OF THE LINE. MY QUESTION IS, IF THEY KNOW ABOUT THE PROBLEM WHY HASN'T A RECALL BEEN ISSUED TO INSTALL THE SUPPORT BRACKET TO PREVENT CRACKING AND FUEL LEAKS WHICH COULD LEAD TO POSSIBLE FIRES IN THE ENGINE COMPARTMENT??? I WAS REALLY SURPRISED THAT THERE WASN'T A FIRE WITH ALL THE FUEL THAT LEAKED OVER THE HOT EXHAUST SYSTEM. *JB
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.
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.
ON CERTAIN CLASS A MOTOR HOMES EQUIPPED WITH VEHICLE SYSTEMS' AQUA-HOT AND HYDRO-HOT WATER HEATERS, WHICH USE WEBASTO BURNER TUBES, THE BURNER TUBES DO NOT MEET SPECIFICATIONS AND COULD FAIL PREMATURELY.
Consequence & remedy
Consequence: THE SURFACE TEMPERATURE OF THE EXHAUST TUBE EXITING FROM THE HEATER CAN INCREASE AND COULD POTENTIALLY IGNITE COMBUSTIBLE MATERIALS IN OR AROUND THE VEHICLE.
Remedy: DEALERS WILL REPLACE THE COMBUSTION CHAMBERS (BURNER TUBES) WITH A NEW ONE FREE OF CHARGE. 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
0
No exact-year investigations in this snapshot.
2006 Monaco Coach Windsor Problems, Complaints & Recalls | Skip That Year
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