2021 Grand Design Momentum
Problems, recalls and owner-reported issues
Structure is the leading concern among 57 owner complaints filed for this model year. This is the highest complaint count among 11 Momentum model years with reports.
Of the 2021 reports, 1 involved a crash.
What owners report most often
Recalls and investigations
Suspension, front, springs, leaf spring assembly, u-bolt, leaf spring to axleJan 26, 2026
Grand Design RV, LLC (Grand Design) is recalling certain 2021-2024 Momentum and 2022-2024 Solitude Fifth Wheel trailers. The U-bolt may become loose due to inadequate preload and preload losses, causing the axle to move out of position.
An axle that moves out of position can cause a loss of vehicle control and increase the risk of a crash.
Dealers will replace the axle attachment components, free of charge. Owner notification letters were mailed May 15, 2026. Owners may contact Grand Design customer service at 1-574-825-9679. Grand Design's number for this recall is 910054. This recall supersedes NHTSA Recalls 23V490 and 24V193.
Campaign 26V044000 on NHTSA.gov
Suspension, front, springs, leaf spring assembly, u-bolt, leaf spring to axleJul 17, 2023
Grand Design RV, LLC. (Grand Design) is recalling certain 2021-2024 Momentum and Solitude fifth wheels, equipped with certain CURT 7000 and 8000 lb axles. The U-bolts may have been improperly tightened, which can cause the axle to move out of position.
An axle that moves out of position can cause a loss of vehicle control and increase the risk of a crash.
Dealers will inspect and tighten the U-bolts, as necessary. Any damaged components will be replaced. Repairs will be performed free of charge. Owner notification letters were mailed August 16, 2023. Owners may contact Grand Design customer service at 1-574-825-9679. Grand Design's number for this recall is 910039.
Campaign 23V490000 on NHTSA.gov
Equipment, appliance, refrigeratorJan 28, 2022
Grand Design RV, LLC (Grand Design) is recalling certain 2013-2021 Momentum, Solitude, and Reflection recreational vehicles. A 110-volt wire in the refrigerator cabinet may be improperly secured, which could result in the wire contacting the refrigerator cooling unit, causing an electrical arc.
An electrical arc increases the risk of a fire.
Dealers will inspect and replace any damaged wiring, and properly secure the wires, free of charge. Owner notification letters were mailed on February 21, 2022. Owners may contact Grand Design customer service at 1-574-825-9679. Grand Design's number for this recall is 910026.
Campaign 22V038000 on NHTSA.gov
Equipment, recreational vehicle/trailer, lpg systemsMay 26, 2021
Grand Design RV, LLC (Grand Design) is recalling certain 2016-2021 Imagine, Transcend, and Momentum travel trailers. The LP regulator that controls the LP gas pressure may fail, allowing excessive gas pressure that causes the appliance flame to increase.
Excessive gas pressure and a larger than intended appliance flame can increase the risk of a fire.
Dealers will replace the LP regulator, free of charge. Owner notification letters were mailed June 24, 2021. Owners may contact Grand Design customer service at 1-574-825-9679. Grand Design's number for this recall is 910023.
Campaign 21V393000 on NHTSA.gov
Representative owner complaints: latches/locks/linkages
9 reports, newest first. Show all
Structure, Latches/locks/linkages, Equipment, Jul 8, 2026
I am reporting a serious, progressive structural defect involving excessive frame flex and structural failure on a 2021 Grand Design Momentum 395MS fifth-wheel RV. This complaint directly aligns with the ongoing NHTSA investigation PE24-0209. The unit exhibits clear and worsening structural integrity failure, including: Slideouts and doors open during transport. Upper deck walls moving under load Lag bolts missing or backing out and pushing through flooring At least one critical structural bolt missing from factory installation Floor deformation and slope changes in the upper deck Slide-out malfunction due to frame distortion Loud popping and snapping noises while towing consistent with frame flex or structural separation These conditions reflect loss of structural integrity under normal use and represent a serious safety hazard, including risk of catastrophic failure while towing. On June 24, 2026, Lippert (frame/component supplier) assigned Case #6876203 and scheduled a mobile service inspection. This Grand Design Momentum 395ms is not safe to tow. It is a danger on the roads and they need to be recalled at the least for inspections of the frame for damage.
Latches/locks/linkages, Equipment, Mar 30, 2026
The contact owns a 2021 Grand Design Recreational Momentum. The contact stated that while hauling the RV and driving at undisclosed speeds, the rear side door unexpectedly opened and the slide-out extended outward. No warning light was illuminated. The trailer was taken to a local dealer and remained with the dealer for additional inspections. The RV was not repaired. The manufacturer was made aware of the failure. The failure mileage was unavailable.
Structure, Latches/locks/linkages, Oct 29, 2025
The contact owns a 2021 Grand Design Recreational Momentum RV. The contact stated while driving 55 MPH, the RV frame flexed. The contact stated that when the RV was loaded, the failure persisted. The contact stated that the screws to the bedroom slide out were detaching. Neither an RV dealer nor an independent mechanic was contacted. The vehicle was not taken to a dealer or an independent mechanic to be diagnosed. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact to bring the RV to a technician to be inspected. The failure mileage was 15,000.
Structure, Latches/locks/linkages, Oct 27, 2025
excessive frame flex/failure, Interior cabinetry coming cracked and apart. Floor separating from side walls. Main door coming open during transit.
Structure, Latches/locks/linkages, Sep 3, 2025
The contact owns a 2021 Grand Design Momentum RV. The contact stated while the RV was parked and occupied, or while driving the RV, there was an abnormal popping and creaking sound coming from the frame of the RV while depressing accelerator pedal or depressing the brake pedal. Neither a dealer nor an independent mechanic was contacted. The contact stated that while driving the RV at an undisclosed speed, the doors opened independently. Additionally, while walking inside the RV, there was an abnormal sound coming from the floorboards. The contact also stated that the frame of the RV was full of rust. The vehicle was not taken to a dealer or independent mechanic to be diagnosed or repaired. The manufacturer was not notified of the failures. The failure mileage was 6,000.
Power train, Structure, Latches/locks/linkages, Jul 7, 2025
Frame failure 2 inches of deflection Doors popped open on hwy walls cracked lag bolts falling out water leaks and floor rotting out from flex
Structure, Latches/locks/linkages, Other or unspecified, Jun 3, 2025
FRAME FAILURE AND STRUCTURE. CARGO DOOR OPENED WHILE TRAVELING. (SAFETY ISSUE) FURNITURE SEPARATING FROM STRUCTURE. BROKEN OVERHEAD CABINETS OVER BED (SAFETY ISSUE) WALL SEPARATING FROM FLOOR IN CARGO AREA WOOD DUSTING FROM CEILING IN BEDROOM AND GARAGE AREA.
Other or unspecified, Structure, Latches/locks/linkages, Jan 16, 2025
Excessive frame flex in pin box area of fifth wheel. Forward left cargo door unlatching while towing. Vehicle is currently at Lazydays dealer in TN for inspection and TSB for excessive frame flex. Inspection has revealed major structural cracks and structural failure in upper deck steel frame structure. Vehicle has been deemed unsafe to transport and must be repaired in place or partially repaired for transport to factory. We noticed excessive deformation of the pin box and substantial rubbing of internal cabinets, etc upon return from a recent trip. Based of the damage, it would have been possible for the RV structure to separate from our tow vehicle putting us and others on the road at significant risk of injury or death. We saw indications of interior movement of cabinets and rubbing on walls for several thousand miles, but no indication of significant pinbox deflection until recently. Manufacturer has provided no guidelines or communication to owners to be aware of potential problems or to indicate things to look for that may indicate the vehicle poses a serious risk/hazard. Initial signs of rubbing inside the vehicle, and a loose latch and flapping of cargo door were observed in January 2024. We have video of substantial gap opening and movement of interior cabinets when taking vehicle off of stabilizer jacks and loading onto fifth wheel hitch of truck. Unable to get additional pictures currently as the RV is at the dealer for repairs. Will attempt to get photos of internal frame damage early next week if possible.
Structure, Other or unspecified, Latches/locks/linkages, Jan 15, 2025
Side compartments opening while towing unit on highway…items in compartment flying out …hatches won’t closed properly to much gap…big gap also on top cap where it connects to wall in front..unit taken to lazdays Tampa for frame flex recall…inspection revealed major cracks in frame everywhere as a result causing major frame flex…lots of welding is being done…by grand design mechanic ..slide system also damaged as a result of frame flex …unit is currently still at lazdays Tampa being welded together…they keep finding more and more damage …. You guys should send an inspector to inspect it to see major frame damage from poor frame build I believe unit is unsafe to be roadworthy with the amount of welding and repairs to frame the keep doing