"How reliable is the 2021 Grand Design Momentum?"

"Based on 91 NHTSA complaints, the 2021 Grand Design Momentum has a median complaint mileage of 8000 miles. The most common issue is Unknown Or Other."

"What are common problems with the 2021 Grand Design Momentum?"

"The most frequently reported component in NHTSA complaints for the 2021 Grand Design Momentum is Unknown Or Other, accounting for a significant portion of the 91 total complaints filed."

2021 Grand Design Momentum: Reliability Data

Source: NHTSA — 91 complaints

Total Complaints

8,000mi

Median Mileage

Unknown Or Other

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

7,000 25th Percentile

8,000 Median Mileage

15,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Unknown Or Other

Body

Suspension

Structure

Latch

Frame And Members

Service Brakes

Exterior Lighting

Electrical System

Recreational Vehicle/Trailer

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"We had a towing incident chain's came detached from camper one side was only tack welded when contacted grand design got no where with them"

"Bolts holding brake caliper assembly to the axle apparently loosen and fell out while on the highway. This caused the caliper to drop, resting on inner part of the tire rim, leaving approximately half to one quarter of the caliper on the disc. Caliper caused significant gouging on the rim. During br..."

"It is a common issue with the Grand Design Momentum G-class travel trailers where the interior floor and possibly the frame are flexing so much that is causes the laminate flooring to lift and separate from the plywood underneath. Bubbles in my laminate flooring were found during our initial walk th..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

Where Are Complaints Coming From?

Top states by complaint count.

FL: 21 TX: 13 TN: 8 WA: 5 WI: 5 CA: 4 SD: 4 MN: 4 MI: 3 CO: 3

Who Files Complaints?

2.2%

Original Owners

97.8%

Second+ Owners

Grand Design Momentum — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue
2019	27	100	Unknown Or Other
2020	44	10,000	Unknown Or Other
2022	59	700	Unknown Or Other
2023	37	-	Body

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28