RoadVitals

2025 Thor Motor Coach Quantum Problems

Owner-reported complaints filed with NHTSA, grouped by component

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
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Latest Jul 25, 2026
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
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Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
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What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2025 Thor Motor Coach Quantum, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Reports by component

Ranked by how many owner reports name each component category

  • Tires & wheels1100.0%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Each component in detail

What the reports in each category say, in the owners' own words

Tires & wheels

Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.

1
report

From owner reports, verbatim

Three original equipment Hankook Dynapro HT tires developed belt-related failures at approximately 6,000 miles of use during a road trip in June 2026. On [XXX], while driving in Tennessee, we noticed a vibration that gradually increased in intensity. We stopped for inspection at C&D Tire & Service in Athens, TN, which found a "bad belt" in the left-front tire at an odometer reading of 5,649 miles. The tire was replaced and retained. The following day, [XXX], the vibration returned and worsened. We stopped at Bill Morgan Tire in Lexington, KY, which found a "severe belt rupture" in the left-rear outer tire and noted that the right-front original equipment tire was "showing signs" of a similar condition. The work order noted all five removed tires had a little over 6,000 miles of use and approximately 12/32" tread remaining. The worst of the tires was retained. Two independent tire dealers, in two different states, identified belt-related abnormalities in three original equipment tires within approximately 24 hours. Given that we were hundreds of miles from home and continuing on interstate highways, we replaced all remaining tires for safety. We have retained two of the removed tires, which show visible belt deformity, and they are available for inspection. No crash, injury, or loss of vehicle control occurred; the vibration was noticed and addressed before any tire failed catastrophically while underway. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID 11752798 · filed Jul 25, 2026

Too few reports in this category for a page of its own — they appear in the full complaint list.

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .