AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2018 Grand Design Momentum
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $4,000–$7,000
The 2018 Grand Design Momentum has an average reliability rating. Recalls involve electrical and LPG system issues, while owner complaints frequently cite structural and suspension concerns. These suggest moderate risk but not severe reliability problems.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| refrigerator wiring | 10,000–20,000 miles | $100–$300 | common |
| LP gas regulator | 15,000–25,000 miles | $150–$500 | occasional |
| vehicle structure | 30,000–50,000 miles | $200–$800 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Inspect LPG system annually
- Check structural integrity yearly
- Service suspension components
- Test locks and latches annually
- Maintain appliances regularly
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Unusual gas appliance flame
- Loose refrigerator wires
- Persistent structural creaks
Generated by gpt-4o on 8/19/2026. Cost ranges are conservative estimates that account for typical regional variation.