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.

Source: NHTSA complaint ODI #11665246 · view all complaints for this vehicle at nhtsa.gov

The contact owns a 2023 Grand Design Momentum hauled by a 2022 Ford F-450. The contact stated that while driving uphill at 65 MPH and depressing the brake pedal, the trailer brakes failed to respond as needed. The contact pulled over onto the side of the highway and was able to bring the trailer to a complete stop. No warning lights were illuminated. The trailer was taken to a local dealer and was inspected. The contact was advised that the trailer no longer had brake pads. The trailer was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 20,000.

Source: NHTSA complaint ODI #11627735 · view all complaints for this vehicle at nhtsa.gov

For the safety of others I would like to report a potential issue with 2023 Grand Design Momentum 5th wheel trailer where the wheel will separate from the axle. This happened recently on September 15th @ 1:30pm while heading west bound on 1-80 just east of Sidney, NE. We heard a clunk, thinking it was a blowout I checked the rear view mirror only see the tire (drivers side rear) rolling away from the vehicle. We immediately pulled over to the side of the interstate and further inspection found the disc rotor hub/spindle missing from the ale. My understanding is this can only occur if the castle nut that holds the hub on the axle is missing. Further, the castle nut is locked in place by a cotter pin. Both the castle nut and cotter pin were missing. I found some parts remnants by the side of the road. (disc brake pad, broken rotor, brake caliper piston) While investigating the issue further in an attempt to understand what happened, I ran across a recall for a very similar issue NHTSA 23V-455 Curt Axle Grease Zerk.

Source: NHTSA complaint ODI #11618459 · view all complaints for this vehicle at nhtsa.gov

In 2023 we purchased this RV. Recently, we discovered that the cargo carrying capacity is incorrect by about 900 pounds, subject to Recall 23V-428. Grand Design knew of this defect before the rig was sold; however, they didn’t remove the vehicle from the dealers lot, nor were we ever contacted by Grand Design. Grand Design knew of the issue in June 2023, and we purchased our rig in July 2023. We also have had the rig in for repairs for broken leaf spring supports and now they’ve done some welding on our frame because of frame flex issues.

Source: NHTSA complaint ODI #11756477 · view all complaints for this vehicle at nhtsa.gov