AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2021 Grand Design Momentum
Overall rating NHTSA-grounded
Below average
Estimated 5-year repair + maintenance cost: $4,500–$8,500
The 2021 Grand Design Momentum has significant suspension and structure issues, with recalls and numerous complaints related to these areas. Owners frequently report problems with U-bolts and axle alignment, and structural complaints also abound.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| U-bolt assembly | 10,000–25,000 miles | $200–$500 | very common |
| Structure | 20,000–40,000 miles | $1,000–$3,000 | common |
| Refrigerator wiring | 15,000–30,000 miles | $150–$350 | occasional |
| LP regulator | 10,000–20,000 miles | $100–$300 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Change engine oil every 7,500 miles
- Inspect brake system annually
- Rotate tires every 10,000 miles
- Check battery every year
- Service air conditioning every 3 years
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Loosened suspension causing swaying
- Unusual noises from leaf springs
- Electrical arcing near refrigerator
- Excessive LP gas smell
- Difficulty in door latching
Generated by gpt-4o on 8/24/2026. Cost ranges are conservative estimates that account for typical regional variation.