AI Damage2018 Grand Design Momentum: common problems
Owners of the 2018 Grand Design Momentum filed 7 complaints with NHTSA, most often about structure and suspension. The maker issued 1 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 7
- Technical service bulletins (TSB)
- 1
What fails most often
- 1 Structure 86% of all complaints
- 2 Suspension 43% of all complaints
- 3 Latches, locks, linkages 29% of all complaints
- Structure: 6 complaints (86% of all).
- Suspension: 3 complaints (43% of all).
- Latches, locks, linkages: 2 complaints (29% of all).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Structure | 6 | 0 | 0 |
| Suspension | 3 | 0 | 0 |
| Latches, locks, linkages | 2 | 0 | 0 |
| Equipment | 0 | 0 | 1 |
| Other | 4 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
On the driver side of the 2018 Momentum Toy Hauler cracked in two locations above the center leaf spring holder. This issue occurred on May 1, 2025. While pulling out of a shop after having the leaf spring holders replaced the axle traveled through a small depression on the ground causing the frame to flex and make a…
These issues began toward the end of last year and have progressively worsened, raising significant safety concerns for our family. The following symptoms have been observed: * Bay and Propane Doors Opening During Transit Both the bay door and propane doors on either side of the trailer have opened unexpectedly while…
I started noticing rub marks on the interior walls next to the night stands after the last few uses, and they appear to be getting worse after each use. I was made aware of the deck/frame flex issues the some GD fifth wheels are having and was referred to TSB 24-001.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 12,538 of 36,656 model years in the NHTSA data (top 34% most complained about).
On average one model year of the Momentum has 18 complaints (12 years in the data). This year has 7, below average.
What to check before buying
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
- Latches, locks, linkages. Door, hood and tailgate latches, especially near the impact.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Customer Satisfaction Program released to have a protective heat shield installed behind convection…
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.
Other years of this model
Questions and answers
What are the most common problems with the 2018 Grand Design Momentum?
Owner complaints to NHTSA most often mention: structure, suspension, latches, locks, linkages. Total complaints: 7.
How many service bulletins (TSB) were issued for the 2018 Grand Design Momentum?
NHTSA lists 1 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2018 Grand Design Momentum from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2018 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.