2020 Grand Design Momentum problems & reliability
28 owner complaints filed with NHTSA for the 2020 Grand Design Momentum, alongside 2 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Structure → | 18 | 64% |
| Unknown OR Other | 15 | 54% |
| Suspension | 7 | 25% |
| Latches/locks/linkages | 3 | 11% |
| Equipment | 2 | 7% |
| Electrical System | 1 | 4% |
| Service Brakes | 1 | 4% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Complaints by incident 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. We have notified the…”
Structure · 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 inspected in the near…”
Unknown OR Other · filed Apr 15, 2026
“Our camper has frame flex. We opened a claim in October 2025 with Grand Design. Received a letter stating they would cover any repairs. It's been in the shop now for over a month and they keep telling us the claim is "in review". Our upper deck frame is cracked/broken, our walls are separating, the door opens when we…”
Unknown OR Other · filed Apr 15, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Frame Flex on Grand Design Fifth Wheel Recreational Trailers
Preliminary Evaluation PE24029 · opened Oct 9, 2024 · open
Technical service bulletins
4 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2020 Grand Design Momentum.
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
Customer Satisfaction Program released to have a protective heat shield installed behind convection microwave on units identified below to address concerns with excessive heat buildup.
CSP 910019 · Service Bulletin/Repair Instructions · issued Apr 1, 2020
On the roll-over sofa, the sofa back stop bolt may be missing. As a result, when the sofa back is rolled over to make a bed it may not lay flat.
TSB19-005 · Service Bulletin/Repair Instructions · issued Oct 8, 2019
On certain Momentum Travel Trailer models ( 25G, 28G & 29G) the EMS power shed for the bedroom AC and Water Heater is wired incorrectly. The hot wire is not routed through the current sensor. As a result, the system…
TSB 19-004 · Service Bulletin/Repair Instructions · issued Jul 9, 2019
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2020 Grand Design Momentum has 2 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2020 Grand Design Momentum?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.