NHTSA lists 1 complaints for the 2005 Monaco Coach Diplomat, 0 of them mention a crash and 1 mention a fire. 0 complaints mention an injury, with 0 injuries and 0 deaths reported.
Data build 2026-10-09.
NHTSA lists this vehicle as MONACO COACH DIPLOMAT.
At a glance
Complaints
1
With crash
0
With fire
1
With injury (complaints)
0
Injuries
0
Deaths
0
Recalls
2
Do not drive recalls
0
Park outside recalls
0
Recall potential units (maximum)
1,189
Investigations
0
Open investigations
0
Manufacturer communications
2
Complaints per 100k sold unavailable. No sales source is available for this record.
Where the complaints are
Top systems
System
Complaints
Share of this vehicle's complaints
ELECTRICAL SYSTEM
1
100.0%
Top subsystems
System
Subsystem
Complaints
One complaint can name several systems, so shares can add to more than 100 percent.
Model-generated complaint tags: This model year has not been tagged.
Defect: ON CERTAIN MOTOR HOMES, THE WATER HEATER EXHAUST ON THE CURVE SIDE WALL UNDER THE BACK SIDE OF THE KITCHEN SLIDEOUT ROOM BOX TERMINATES UNDER THE SLIDE BOX WHEN IN THE EXTENDED POSITION. THIS DESIGN COULD CREATE A RISK OF MIGRATION OF CARBON MONOXIDE INTO THE INTERIOR OF THE MOTOR HOME.
Consequence: EXPOSURE OF THE OCCUPANTS TO CARBON MONOXIDE COULD RESULT IN INJURY OR DEATH.
Remedy: DEALERS WILL REPLACE THE WATER HEATER WITH A 16 GALLON ATWOOD UNIT THAT HAS A DIFFERENT EXHAUST TERMINATION. THE RECALL BEGAN MARCH 25, 2005. OWNERS SHOULD CONTACT MONACO AT 1-800-685-6545.
Date: 2004-09-13. Systems: ENGINE AND ENGINE COOLING.
Defect: ON CERTAIN MOTORHOMES EQUIPPED WITH CUMMINS ENGINES, OIL CAN LEAK INTO THE ENGINE COMPARTMENT FROM A CRACK IN THE CUP PLUG.
Consequence: OIL LEAKAGE ON A HOT ENGINE CAN RESULT IN AN ENGINE COMPARTMENT FIRE, POSSIBLY RESULTING IN INJURIES.
Remedy: CUMMINS IS CONDUCTING THE OWNER NOTIFICATION AND REMEDY FOR THIS CAMPAIGN. CUMMINS WILL INSTALL A STEEL CUP PLUG BOSS CAP TO ALL AFFECTED ENGINES. OWNERS SHOULD CONTACT CUMMINS CUSTOMER ASSISTANCE CENTER AT 1-800-343-7357 OR MONACO AT 1-800-685-6545.
Do not drive: No. Park outside: No.
Investigations
0 investigations; 0 open.
Manufacturer communications
2 manufacturer communications.
Communications by system
System
Count
ENGINE AND ENGINE COOLING
2
FUEL SYSTEM, GASOLINE
1
10025621
Date: 2008-05-05. Type: Service Bulletin/Repair Instructions. Systems: ENGINE AND ENGINE COOLING, FUEL SYSTEM, GASOLINE.
MONACO COACH CORPORATION HAS BEEN ADVISED THAT CUMMINS INC. HAS INITIATED A SERVICE CAMPAIGN BULLETIN C0805 PERTAINING TO CERTAIN ISC AND ISL ENGINES. *PE
10010460
Date: 2004-09-14. Type: Service Bulletin/Repair Instructions. Systems: ENGINE AND ENGINE COOLING.
UPGRADE CUMMINS ISL 350HP TO 400HP. *TT
Notes on this record
Complaints from the API and bulk file are merged and deduplicated by ODI number; the API alone misses records.
System and subsystem counts are numbers of distinct complaints, recalls or communications that name them. One record can name several systems, so shares across systems can add to more than 100 percent; a single share never exceeds 100 percent.
Recalls are counted once per campaign, investigations once per action and manufacturer communications once per NHTSA id, even when NHTSA lists several model names for the same record.
A sales denominator is a calendar-year proxy, not the population of vehicles still in use. Rates are copied from verified pipeline output.