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: 2 of 2 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.
Electrical System. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Electronic Stability Control (esc). Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Parking Brake. 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.
Electrical SystemElectronic Stability Control (esc)
2003 HOLIDAY RAMBLER MODEL NEPTUNE IS EQUIPPED WITH CUMMINS ISB300HP DIESEL ENGINE AND ALLISON 2000MH TRANSMISSION. ENGINE CONTROL MODULE (ECM), AND TRANSMISSION CONTROL MODULE (TCM). WHEN CRUISING 60-70 MPH, ENGINE RPM ROARS TO ABOUT 4000 RPM AND VEHICLE SPEED DROPS TO 15-20 MPH, CREATING SAFETY CONDITION. SERVICE OF ECM AND T…
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2003 HOLIDAY RAMBLER MODEL NEPTUNE IS EQUIPPED WITH CUMMINS ISB300HP DIESEL ENGINE AND ALLISON 2000MH TRANSMISSION. ENGINE CONTROL MODULE (ECM), AND TRANSMISSION CONTROL MODULE (TCM). WHEN CRUISING 60-70 MPH, ENGINE RPM ROARS TO ABOUT 4000 RPM AND VEHICLE SPEED DROPS TO 15-20 MPH, CREATING SAFETY CONDITION. SERVICE OF ECM AND TCM DOES NOT ELIMINATE PROBLEM. *TR
NHTSA ODI #10280244
Official recalls
0
No recalls in this snapshot.
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.
2003 Monaco Coach Holiday Rambler Problems, Complaints & Recalls | Skip That Year