2021 Grand Design Momentum problems, complaints & recalls
Most-reported problem areas: Structure:body (9) · Suspension (8) · Structure (6)
🧭 Reliability snapshot
Compared against other Grand Design Momentum model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (4)
Suspension:front:springs:leaf Spring Assembly:u-Bolt, Leaf Spring To Axle 2026-01-26 · campaign 26V044000 · 7,585 vehicles
Defect: 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.
Risk: An axle that moves out of position can cause a loss of vehicle control and increase the risk of a crash.
Fix: 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.
Suspension:rear:springs:leaf Spring Assembly:u-Bolt, Leaf Spring To Axle 2023-07-17 · campaign 23V490000 · 6,270 vehicles
Defect: 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.
Risk: An axle that moves out of position can cause a loss of vehicle control and increase the risk of a crash.
Fix: 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.
Equipment:appliance:refrigerator 2022-01-28 · campaign 22V038000 · 43,421 vehicles
Defect: 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.
Risk: An electrical arc increases the risk of a fire.
Fix: 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.
Equipment:recreational Vehicle/Trailer:lpg Systems 2021-05-26 · campaign 21V393000 · 55,508 vehicles
Defect: 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.
Risk: Excessive gas pressure and a larger than intended appliance flame can increase the risk of a fire.
Fix: 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.
Service bulletins (2)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Structure:body 2025-11-22 · 920017 · Service Campaign
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 of manufacturing variations, an overload condition, or hitch modifications. wall
Structure 2024-04-10 · TSB 24-001 · Service Bulletin/Repair Instructions
tsb 24-001 issued in march on march 7th. concern: complaint of upper deck flex which results in cosmetic damages to the interior and excessive flex at the pin box. remedy : the procedure outlined in attached summary to assess damages if any and direct customers to the next steps.
What owners report
2026-10-02 · Suspension:rear:springs:leaf Spring Assembly“leaf spring broke in half while traveling down the highway. completely destroyed left rear tire by locking it up and causing it to drag for 1 mile before i noticed and could stop. …”
2026-09-27 · Suspension:rear:springs:leaf Spring Assembly“upon returning from a recent trip i discovered that the passenger side rear leaf spring had snapped in to, near the rear leaf spring hanger. the equalizer also had cracked welds because of the incident. thankfully the front of the leaf spring was still attached. this rv issue may be related to the widely documented frame flex issue. 1) the rv…”
2026-07-14 · Structure“we own a 2021 grand design momentum 393g toy hauler that has severe frame flex and bolts in slide have started backing out. we noticed this when driving and the extreme pushing/chucking when accelerating or braking and also the visible failure on the unit. we have contacted gran design, the manufacturer, for warranty repair and was able to go se…”
2026-07-08 · Structure“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 d…”
2026-05-27 · Unknown Or Other“frame cracked and suspension issues.…”
2026-05-24 · Structure:body“regarding 2021 grand design momentum 376ths: compartment doors popping open during transport; grand design customer satisfaction campaign tsb-24-001 dated 11/1/2025 regarding frame flex and wall securement. returned to dealer on 12/1/2025 for inspection. dealer found the following: all doors except p/s compartment door warped or bowed; p/s cracki…”
2026-05-22 · Unknown Or Other“scheduled appointment with dealer for the grand design frame flex recall today, 22 may 2026. approximately 4 hours after dropping the trailer off the dealer called and said that the technician found significant frame flex and that the unit was unsafe to be towed. no other information was provided. i did ask for the measurements that the tsb 24-00…”
2026-03-30 · Latches/Locks/Linkages:doors:latch“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 …”
2026-02-25 · Structure:body“my grand design momentum fifth wheel trailer is experiencing frame flex and structural integrity failure. the unit has developed spider cracking in the exterior fiberglass, interior wall separation, and plumbing issues believed to be caused by frame flex. the dealership has acknowledged structural concerns and installed lag bolts, but the underly…”
2025-11-17 · Structure:frame And Members“the contact owns a 2021 grand design momentum rv. the contact stated that while inspecting the rv, the contact became aware that the outrigger brackets were bent and fractured. the contact stated that the failure was visible over the axles. in addition, the welding on the cross-member beams was fractured, causing the floor to crack, and the exterio…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.