GRAND DESIGN Complaints

Faulty panel wiring but everything works on shore and truck power. Called Grand Design (case #00996054) and was told it was a bad LiFEPO4 battery . I open the distribution panel and the schematic shows I should have 2 red wires (one to converter and the other to the battery) but I only have 1. Solution: Issue was in the original wiring from the factory. I called GD again and tech noticed the red wire was there but incorrectly connected to the DC fuse panel side (essentially bypassing the converter) as "battery disconnect." For my sanity I spent $165, not reimburseable per GD, and had a RV service tech come out and confirm the wiring was now correct and was told once I got a new battery everything will work as intended. I purchased new smart LiFePO4 and now all 12V equipment works as it should both on and off shore power. In conclusion, I've had no battery power once both the OEM and replacement LiFePO4 batteries went dead because they were "NEVER/EVER" being charged since the batteries were "NOT CONNECTED". This meant the battery disconnect never functioned from the beginning and when the RV battery disconnect is switched to "off," it severs the connection between the battery and the RV's 12-volt DC system and therefore the battery will not power appliances or charge when connected to shore power. By connecting an RV battery directly to the 12V DC panel (bypassing the converter) means the battery becomes the sole power source for all 12-volt appliances. Issues: Limited power duration--12V items will run until the battery drains, which can happen in a few hours/days depending on usage. No automatic charging--The battery will not be recharged, as the converter is not in the loop. Once the battery dies, you will lose all 12V power. Safety risk--The battery is likely connected to the panel without a battery disconnect switch or proper fuses, creating a potential fire hazard if a short occurs.

In early November 2025, while towing our 2024 Grand Design Momentum 344M M-Class fifth wheel toy hauler to a family Thanksgiving gathering, the rearmost driver-side leaf spring fractured and failed during travel. The trailer was towed by a 2024 Ram 3500 dually, properly rated for this unit, operated within all load ratings, and driven at normal cautious speeds at the time of failure. The failure rendered the trailer immobile and unsafe to move. It has remained in storage since the incident because the damaged suspension cannot support safe relocation. A leaf spring is a primary suspension component that is not customer-serviceable and not owner-maintained. The remaining leaf springs on the unit were inspected and are in good condition, indicating the failure was isolated to the defective spring rather than a result of abnormal use, overloading, or environmental exposure affecting the suspension system as a whole. This points to a manufacturing defect in the failed component. The trailer was purchased new from an authorized dealer (Blue Compass RV) in October 2024. The spring failed only weeks after the one-year factory warranty expired, at an extremely low service age for a primary structural suspension component. Safety concern: This failure happened at low speed, allowing a controlled stop without incident. Had it occurred at highway speed, likely consequences include sudden loss of trailer stability, axle and tire damage from the collapsed corner, trailer sway or jackknife, tire blowout, and potential loss of control of the tow vehicle. A loaded fifth wheel toy hauler of this size presents a severe hazard to occupants and surrounding motorists if suspension fails at speed. I am filing this report so NHTSA can track potential defect trends on Grand Design Momentum fifth wheels. Other owners of this model and model year may be at similar risk. Photographs, VIN, purchase documentation, and manufacturer correspondence available on request.

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 are traveling down the road. The roof is falling apart, bubbled and cracking. Side walls are cracked. We've sent pictures, the shop has sent pictures and we are getting no answers. The newest they are telling us is that it's now out of warranty. The camper isn't safe to tow and they aren't fixing it or providing the shop with details on how to fix it.

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 future by a Grand Design authorized service agents. The condition is further degrading the safety of the unit with each use in transit.

Fifth wheel was purchased with a tire monitoring system included. It has not worked since we purchased it 8-19-2024. We have taken it twice to the dealer, Blue Compass and it still doesn't work. I am told the problem is they put the wrong sensors in the tires. Lippert and Grand Design are fighting about who's fault it is all while it still doesn't work. Not having the tire sensor/monitoring system working has created a safety issues for us. We have no idea if the tires get hot, start to lose air, all of which could happen without the system working correctly. That creates a safety issue because the camper is a fifth wheel 35' long weighing 12,000 lbs. I am reporting this because I have no where else to turn, the manufacture and camper company refuse to take care of the problem.

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.

The contact owns a 2025 Grand Design Lineage RV built on a 2024 Mercedes-Benz Sprinter 4500 Chassis. The contact had received notification of NHTSA Campaign Number: 25V473000 (EQUIPMENT, LATCHES/LOCKS/LINKAGES); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool showed no open recall.

I am filing a complaint regarding the frame manufactured by Lippert Components on my 2021 Grand Design Solitude 380FL (VIN [XXX] ). Lippert is the OEM supplier of the frame and has been directly involved in inspection and repair of ongoing structural failures. The unit has experienced repeated structural failures, including frame flex, broken welds, cracking of the main I-beam rails above both axles, torn steel upper sill plates and suspension failures. These issues began within the manufacturer’s warranty period and required extensive factory repairs from December 2024 to February 2025, including reinforcement of the upper deck, weld repairs, sill plate replacement, and added gussets. Despite these repairs, new failures developed shortly after. In September 2025, a Lippert technician (dispatched at Grand Design’s request) identified new frame cracks above both axles, a bent outrigger support, and repeated suspension failure. These were not pre-existing conditions but occurred after factory structural repairs. In December 2025, Lippert performed additional field repairs, including welding the cracked frame, adding fishplates, reinforcing outriggers, and installing cross-members. These repairs were performed under engineering direction, and Lippert confirmed no standard TSB applied to this condition. Despite multiple repair attempts, the unit continues to exhibit structural-related issues, including cargo doors opening during transit and recurring suspension failures. These conditions indicate ongoing and unsafe frame deflection and instability. Grand Design has now stated their repairs are done per a customer satisfaction campaign, and attributed responsibility for any ongoing frame issues to Lippert, and has abandoned any further assistance with cargo doors opening during transit. This represents a systemic structural defect affecting safety, including risk of debris or components entering roadways and loss of structural integrity during travel. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION

Axle assembly does not meet Federal Vehicle Safety requirements. Vehicle is rated at GVWR/PNVB 8995LB and axle assemble ratings are 4400 each. Two axles at 4400 each is 8800 LB, see axle tag photos. The leaf springs are rated at 3500 LBS with both being 7000 LB, see axle tag Leaf Spring Designation 7225 LB. I have 4,427 documented miles on the recreation vehicle and just had the bearings repacked and two out of the four bearings show scoring and discoloration from extreme over heating indicating improper calculation of load bearing components. The manufacture's own labels show the suspension is not rated or configured for the RV's requirements.

I own a 2022 Grand Design Solitude 346FLS fifth wheel trailer. The trailer has been at the dealership for over nine months after structural frame cracks and weld separations were discovered during inspection. The cracks appear in structural frame components and welded areas supporting the chassis. This raises concerns about the integrity of the trailer frame during towing and braking. In addition to the frame defects, all four leaf springs in the suspension system have failed or lost structural integrity. This suspension failure presents a safety risk because it affects axle alignment, load support, and trailer stability while towing. The trailer manufacturer (Grand Design) and dealer have been notified, but the unit has remained out of service for an extended period while the manufacturer decides how to address the problem. Structural frame cracking combined with suspension failure represents a serious safety concern for a towable RV traveling at highway speeds. I am submitting this complaint so the issue can be investigated for potential defects affecting other trailers of this model or similar models.