Monaco Coach DIPLOMAT problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
46 owner complaints analyzed
20 distinct recall campaigns
21,688 mi median reported failure mileage
Scope: 1998 to 2011 model years. Data snapshot: . 21 complaints include usable failure mileage.
Most common problems
Electrical System is the most frequently named component, appearing in 8 of 46 complaints (17.4%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 5 | 10.9% |
| Electrical and battery issues | 5 | 10.9% |
| Fuel system concerns | 3 | 6.5% |
| Transmission and shifting | 2 | 4.3% |
| Steering behavior | 2 | 4.3% |
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 |
|---|---|
| Electrical System | 8 |
| Structure | 7 |
| Visibility:Windshield | 4 |
| Equipment | 3 |
| Equipment:Recreational Vehicle/Trailer | 3 |
| Equipment:Recreational Vehicle/Trailer:Lpg Systems:Water Heater | 3 |
| Service Brakes, Hydraulic | 3 |
| Structure:Frame And Members | 3 |
Electrical System: 8; Structure: 7; Visibility:Windshield: 4; Equipment: 3; Equipment:Recreational Vehicle/Trailer: 3; Equipment:Recreational Vehicle/Trailer:Lpg Systems:Water Heater: 3; Service Brakes, Hydraulic: 3; Structure:Frame And Members: 3
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 13 |
| 25,000 to 49,999 | 8 |
| 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: 13; 25,000 to 49,999: 8; 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 (13). 25 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 |
|---|---|
| 2000 | 4 |
| 2001 | 3 |
| 2002 | 10 |
| 2003 | 5 |
| 2004 | 1 |
| 2005 | 5 |
| 2006 | 4 |
| 2007 | 2 |
| 2008 | 4 |
| 2009 | 2 |
| 2010 | 1 |
| 2012 | 2 |
| 2015 | 3 |
2000: 4; 2001: 3; 2002: 10; 2003: 5; 2004: 1; 2005: 5; 2006: 4; 2007: 2; 2008: 4; 2009: 2; 2010: 1; 2012: 2; 2015: 3
Pattern summary
Electrical System leads the component reports. Braking behavior appears in 5 complaint narratives. Electrical and battery issues appears in 5 complaint narratives. Fuel system concerns appears in 3 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.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 10033879 · 2003-09-23 (September 23, 2003)
WHILE DRIVING 65 MPH, THE AIR DRYER ON THE AIR BRAKES HAD BLOWN APART WHICH CAUSED THE BRAKES TO LOSE POWER. THE DRIVER WAS ABLE TO AVOID A COLLISION AND THE MOTOR HOME WAS TOWED TO THE RESIDENCE. *AK *SCC *JB
Owner-reported narrative. Look up ODI 10033879 at NHTSA ↗
Owner report 859599 · 2000-04-03 (April 3, 2000)
WHILE DRIVING FRONT END SHAKES, PULLS TO RIGHT AND IT IS DIFFICULT TO STOP SAFELY. ALSO, BRAKES MAKE A LOUD KNOCKING NOISE, AND A SEVERE SHAKE. *AK
Owner-reported narrative. Look up ODI 859599 at NHTSA ↗
Owner report 566793 · 2002-07-22 (July 22, 2002)
THE CONSUMER STATES THAT THE OPERATION OF ONE/BOTH REAR LEVELING JACK(S) WILL INTRODUCE A TORSIONAL OR TWISTING MOVEMENT OF THE COACH CHASSIS, WHICH OVER TIME WILL LOOSEN THE WINDSHIELD FROM THE FRAME AND CAUSE ONE EDGE/CORNER TO UNSEAT/PARTIALLY SEPARATE FROM THE MOLDING GASKET CREATING AN AIR GAP. (OTHER PROBLEMS WHICH ROOT FROM THE REAR LEVEL JACK(S) ARE: ELECTRICAL, THE BODY SHIFTING CAUSED THE DOORS TO BIND, 4 TIMES THE PLASTIC LATCH ON THE EXTERIOR CARGO COMPARTMENT DOORS HAVE BROKEN, ALSO CAUSING THE BATTERY INVERTER SYSTEM TO OVER CHA…
Owner-reported narrative. Look up ODI 566793 at NHTSA ↗
Owner report 860339 · 2000-04-14 (April 14, 2000)
WHILE DRIVING AND WITHOUT ANY WARNING MOTORHOME JUST DIED. MOTORHOME WAS TOWED TO DEALERSHIP. DEALERSHIP REPLACED TWO ELECTRICAL PARTS. THE DELAER WAS NOT SURE WHAT CAUSED THE PROBLEM. PLEASE PROVIDE ANY FURTHER INFORMATION*AK.
Owner-reported narrative. Look up ODI 860339 at NHTSA ↗
Owner report 10016258 · 2003-04-21 (April 21, 2003)
FUEL TANK LEAK. *JB
Owner-reported narrative. 36,000 miles reported. Look up ODI 10016258 at NHTSA ↗
Owner report 8002231 · 2002-01-15 (January 15, 2002)
WHILE DRIVING FUEL WAS LEAKING FROM THE VEHICLE, IT WAS LEAKING ONTO ONCOMING TRAFFIC. CONTACTED DEALER ,AND DEALER REPLACED FUEL TANK. FUEL TANK HAS BEEN REPLACED TWICE ALREADY. *AK
Owner-reported narrative. Look up ODI 8002231 at NHTSA ↗
Owner report 748796 · 2001-07-20 (July 20, 2001)
WINDSHIELD SHIFTS OUT OF PLACE AND KEEPS CRACKING. *AK
Owner-reported narrative. Look up ODI 748796 at NHTSA ↗
Owner report 565686 · 2002-05-07 (May 7, 2002)
VEHICLE EXHIBITS CONSIDERABLE SWAY AND WANDERING WHILE IN MOTION, STEERING GEAR RATED UP TO 9000 LB FRONT AXLE, ACTUAL AXLE WEIGHT 10460, INSTALLED 12,800 LBS. *YD
Owner-reported narrative. Look up ODI 565686 at NHTSA ↗
Owner report 764059 · 2002-07-10 (July 10, 2002)
IT HAS BEEN ALIGNED NUMEROUS TIMES,STEERING PUMP HAS BEEN CHANGED. STILL CAN NOT HOLD THE VEHCLE IN ONE LANE ON HIGHWAY. FACTORY SAYS ALL COMPONENTS ARE "WITH IN" SPECS.
Owner-reported narrative. Look up ODI 764059 at NHTSA ↗
Recalls by model year
All campaigns in the snapshot affecting each model year, including recalls announced years later.
Recall campaigns
Shared campaigns appear once in each affected model year.
| Category | Count |
|---|---|
| 1998 | 3 |
| 1999 | 3 |
| 2000 | 2 |
| 2001 | 4 |
| 2002 | 1 |
| 2004 | 1 |
| 2005 | 2 |
| 2006 | 3 |
| 2007 | 3 |
| 2008 | 2 |
| 2009 | 1 |
| 2010 | 5 |
| 2011 | 4 |
1998: 3; 1999: 3; 2000: 2; 2001: 4; 2002: 1; 2004: 1; 2005: 2; 2006: 3; 2007: 3; 2008: 2; 2009: 1; 2010: 5; 2011: 4