2020 Grand Design Momentum structure problems
18 owner complaints filed with NHTSA name the structure on the 2020 Grand Design Momentum — 64% of all complaints for this model year.
What owners report
“I'm submitting this report on our RV because we are discovering we very likely have an issue with the frame which is causing over flexing when it is being towed. This has caused damage inside the RV where the trim and cabinetry are damaging the walls due to more movement than should be occurring…”
filed Jun 22, 2026
“My Momentum 5th wheel is experiencing frame flex and wall separation . This condition is causing damage to the interior side wall adjacent to cabinets in the bedroom wall. Frame and or wall assembly is excessively moving in transport and during hooking and unhooking from the unit. Unit will be…”
filed Apr 15, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Grand Design is addressing concerns of excessive frame flex or wall securement in the front upper deck area of a limited number of fifth-wheel units. This condition could potentially occur over time due to a combination…
920017 · Service Campaign · issued Nov 22, 2025
Structure problems in other Momentum years
| Year | Reports | Share |
|---|---|---|
| 2023 Momentum | 18 | 78% |
| 2022 Momentum | 26 | 84% |
| 2021 Momentum | 42 | 75% |
Other reported problem areas on the 2020 Grand Design Momentum
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.