AI Damage2020 Thor Motor Coach Magnitude reliability: common problems
Owners of the 2020 Thor Motor Coach Magnitude filed 2 complaints with NHTSA, most often about structure. The maker issued 1 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 2
- Technical service bulletins (TSB)
- 1
What fails most often
- Structure: 2 complaints (100% of all); manufacturer bulletins for this component: 1.
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Structure | 2 | 0 | 1 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
My front cap has been leaking for about a year, and I have had it "repaired" three times already under warranty. It is still leaking, and, in fact, it may be getting worse. This cap contains, among other things, a nearly queen-sized bed for sleeping.
The cabover cap that attaches to the main RV body is coming loose and appears to be separating from the body.
Comparison
By complaint count this model year ranks 17,838 of 32,257 model years in the NHTSA data (among the 45% least complained about).
On average one model year of the Magnitude has 3 complaints (5 years in the data). This year has 2, below average.
What to check before buying
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- A topcoat sealant was provided by our vendor that did not meet Thor Motor Coach's standard for performance
This was used on 2019 & 2020 Magnitude and Omni Motorhomes. If the primary sealant does not provide sufficient coverage, the cabover window may experience water intrusion. The repair will be to remove the existing…
Other years of this model
Questions and answers
What are the most common problems with the 2020 Thor Motor Coach Magnitude?
Owner complaints to NHTSA most often mention: structure. Total complaints: 2.
How many service bulletins (TSB) were issued for the 2020 Thor Motor Coach Magnitude?
NHTSA lists 1 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2020 Thor Motor Coach Magnitude from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2020 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.