1999 Monaco Coach Diplomat Fuel system Problems
- Complaints
- 3about this part
- Share
- 30%of 10 total for the year
- Median mileage
- 36,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the fuel system of the 1999 Monaco Coach Diplomat, 30% of the 10 complaints for this model year. Where a mileage was given, the median is 36,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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.”
NHTSA complaint #8002231, filed 2002-01Fuel system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 1999 | 3 | 30% |
Other parts of the 1999 Monaco Coach Diplomat
3 complaintsBrakes
2 complaintsEquipment
2 complaintsTires
2 complaintsElectrical system
1 complaintsOther or unknown
1 complaintsBody and structure
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 1999 Monaco Coach Diplomat
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology