2023 Grand Design Momentum

This RV has experienced ongoing water intrusion due to faulty manufacturer-installed plumbing fittings and hoses, which allowed leaks into the interior. Moisture has reached electrical wiring, creating a serious fire hazard and contributing to unsafe living conditions. Essential components—including the furnace, refrigerator, and water heater—have proven unreliable or unusable throughout the ownership period. Mold growth has appeared due to the persistent damp environment. This has caused health issues, including respiratory difficulties, headaches, brain fog, and fatigue, with heightened risk due to a pre-existing asthma condition. Structural issues include misaligned exterior doors that fail to seal properly and loud creaking/popping noises during hitching, suggesting possible frame or chassis integrity problems. Equipment failures include a non-functional center awning, persistent sewer odor (suggesting a failed ventilation system), and malfunctioning A/C and heating units. Despite multiple inspections and documented findings from Grand Design–approved technicians, the manufacturer has offered only limited, pre-approved repairs that fail to address root causes. These problems severely impact the safety and habitability of the RV, which is used as a full-time residence. The manufacturer has declined a full inspection, replacement, or buyback. No warning lamps appeared, but symptoms began shortly after purchase and have worsened. The RV remains available for inspection. We request a formal investigation into possible safety standard violations.

There is a serious electrical issue with the Grand Design Momentum 397ths. There are twenty-three electric outlets throughout the RV. Two are located outside. Two more are dedicated to microwave and electric fireplace. The two for microwave and fireplace are on their own breakers. All other twenty-one outlets are on just ONE 15 amp breaker. Typically there is a maximum of eight outlets per 15 amp breaker or a maximum of 10 amps on one breaker to avoid tripping the breaker. The outlet located on the side of the bathroom vanity under the sink in bathroom located in garage is not a GFCI although labeled as such. There are two GFCI outlets located in the front bathroom and the outlet beside the stove. In April of 2024 Grand Design took the RV from OH to Elkhart IN for repairs and address service bulletins for frame failure. I reported the issue at that time. I was informed the wiring of the outlets are wired according to specs and therefore no changes could be made. There is room for another breaker in the breaker box. We have been living in our RV full time and the breaker has tripped no less than six times per week. This constant overload is only leading to a fire hazards. This is yet another issue and example of potentially life threatening the RV industries refuse to make right.

We were driving through a mountain range and the trailer brakes went out on Trailer. Had to us exhaust brake to slow trailer down and stop. We could have crashed putting my family of 4 at high risk as well as others on the road. This was an extremely scary trip with no trailer braking. Our inverter and battery switch caught fire during a camping trip 8/12/24. My family was put in harm's way with the possibility of the trailer going up in flames! Called Grand Design. They immediately made a ticket for a technician to come replace inverter and other wiring. Grand Design told us we were NOT to use our trailer until all fixed. Grand Design flew a technician out 8/20/24 to replace inverter. Technician held up the inverter to us, it was melted. He said this was completely Grand Design's fault. Also was told by technician to take trailer in for frame flex issues as well from recall by Grand Design. The frame flex was real. We had issues with our slides as well as the body looking crooked on the frame. The RV service center Grand Design sent us to found that there were ZERO lag bolts installed holding the body on the frame. The front corner of trailer was leaking due to the roof failing. Grand Design called for replacement of all cabinetry in front area as well as replace entire roof. This frame flex could have had detrimental outcomes due to the frame not being bolted down. All components that failed have been fixed by a certified rv service center. We have not used the trailer as we picked it up one week ago. We are nervous to use the trailer with all the issues we had. There was no warning to any of these failures.

We are showing many signs of excessive frame flex/failure in our 2023 Grand Design Momentum 397THS. Our baggage/storage doors do not properly fit nor lock. The RV was in the shop from Jan-May 2023 to address this. Had the doors replaced and resealed. They still are not flush with the RV, still barely latch, and have popped open while driving. While in the shop, they addressed but "could not duplicate" the underbelly continuously filling with water when it rains. Excessive amounts of water that saturate all of the insulation-- causing us to drive with extra weight until we can stop and replace it all. Not sure where the water even comes from. Our filon around the hitch is seperating. Our pinch molding on both sides completely falls out. The screws holding front cap to roof popped out, sealant broken. There is wall separation in the lower deck. This causes excess rubbing of the walls, popping trim pieces off, and dust left after any movement of the RV. There is loud creaking and popping as we lift our RV off of our truck. The lag bolts are unscrewing themselves from the frame in the upper deck. Slide in the upper deck is digging into the flooring, leaving indentations, while in transit. Floor creaking in upper deck. Our electrical wiring for our running lights/turn signals/brake lights, as well as our leveling system wires were zip tied to the spindle of our slide. This caused the wires to wrap around over and over and slice themselves apart. In turn causing ALL of those systems to fail-- no running lights, no turn signals, no brake lights, and our jacks would not go down.