NHTSA vehicle safety data

2021 Thor Motor Coach Magnitude Recalls & Complaints

The 2021 Thor Motor Coach Magnitude has 2 NHTSA recall campaigns and 3 owner complaints on file as of November 3, 2026. Recall repairs are usually free at an authorized Thor Motor Coach dealer.

NHTSA recall and complaint data for the 2021 Thor Motor Coach Magnitude. Recall data is refreshed daily from NHTSA.

2021 Thor Motor Coach Magnitude owner complaints

Owners have filed 3 complaints with NHTSA about the 2021 Thor Motor Coach Magnitude, describing incidents dated December 12, 2020 to August 15, 2025.

Most-cited components

Electrical System 2 complaints
Power Train 1 complaint
Structure 1 complaint
Unknown or Other 1 complaint

Newest complaints

ODI #11689266 · Filed September 23, 2025
Rear house battery tray weld failed, tray fell and hit the ground, damaging BIM, various cables etc. Identical to Recall 19V-566 (2019–2020) but not included for 2021. Safety concern: Batteries may detach on roadway, cause shorts/fire, or total power loss.
ODI #11527258 · Filed June 15, 2023
A wiring harness was found pinched, pins bent and broken, apparently in the process of mating the motorhome body to the cassis cab. This cable has power in it and could result in a vehicle fire. Thor has been completely unresponsive in assisting me, despite acknowledging it’s out of warranty, and I…
ODI #11384080 · Filed December 18, 2020
TL* THE CONTACT OWNS A 2021 THOR MAGNITUDE BB35 BUILT ON A 2020 FORD F-550 CHASSIS N/A. THE CONTACT STATED WHILE STATIONARY AT A TRAFFIC LIGHT, WHILE THE DEPRESSING THE ACCELERATOR PEDAL, THE RV MADE AN ABNORMAL NOISE AND STARTED TO ROLL BACKWARDS. THE CONTACT STATED NO WARNING LIGHT WAS…

Read all 3 complaints

LP Gas Line Incorrectly Routed

NHTSA #22V094000 · Equipment — Recreational Vehicle/Trailer — LPG Systems — Lines and Fittings · NHTSA notice

Reported February 18, 2022 · Thor Motor Coach

Potentially affected: 731 vehicles

Repair completion: 45.42% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Thor Motor Coach campaign RC000256 · Owners notified March 24, 2022

Defect description

Thor Motor Coach (TMC) is recalling certain 2020-2021 Omni and Magnitude motorhomes. The LP gas line may have been incorrectly routed through the rear suspension leaf springs, which could damage the line and cause a gas leak.

Safety consequence

A gas leak increases the risk of a fire.

Manufacturer remedy

Dealers will re-route the LP line as needed, free of charge. Owner notification letters were mailed March 24, 2022. Owners may contact TMC customer service at 1-877-798-855-2867. TMC's number for this recall is RC000256. This recall is an expansion of NHTSA recall 21V-754.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

LP Gas Line Incorrectly Routed

NHTSA #21V754000 · Equipment — Recreational Vehicle/Trailer — LPG Systems — Lines and Fittings · NHTSA notice

Reported September 28, 2021 · Thor Motor Coach

Potentially affected: 738 vehicles

Repair completion: 63.81% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Thor Motor Coach campaign RC000242 · Owners notified November 23, 2021

Defect description

Thor Motor Coach (TMC) is recalling 2021-2022 Magnitude and Omni motorhomes. The LP gas line may have been incorrectly routed through the rear suspension leaf springs, which could damage the line and cause a gas leak.

Safety consequence

A gas leak increases the risk of a fire.

Manufacturer remedy

Dealers will re-route the LP line as necessary, free of charge. Owner notification letters were mailed November 23, 2021. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000242.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

try.vin has no NCAP crash-test rating on file for the 2021 Thor Motor Coach Magnitude. NHTSA rates some vehicles by body style — pickups by cab, vans by roof height — so check nhtsa.gov/ratings.

3 owner complaints have been filed with NHTSA for the 2021 Thor Motor Coach Magnitude.

Electrical System; Structure; Unknown or Other

ODI #11689266

Incident: August 15, 2025 · Filed: September 23, 2025

Rear house battery tray weld failed, tray fell and hit the ground, damaging BIM, various cables etc. Identical to Recall 19V-566 (2019–2020) but not included for 2021.  Safety concern: Batteries may detach on roadway, cause shorts/fire, or total power loss. 

Electrical System

ODI #11527258

Incident: June 12, 2023 · Filed: June 15, 2023

A wiring harness was found pinched, pins bent and broken, apparently in the process of mating the motorhome body to the cassis cab. This cable has power in it and could result in a vehicle fire. Thor has been completely unresponsive in assisting me, despite acknowledging it’s out of warranty, and I simply needed verification of their integration to the chassis, to reassure the after market warranty that this wasn’t something “tampered with”. As a retired fire fighter, I have seen the result of RV fires. They burn fast, and people die. I felt I had no option but to refer this after their intransigent and dismissive attitude. I can supply additional documentation when I retrieve the vehicle from the shop.

Power Train

ODI #11384080

Incident: December 12, 2020 · Filed: December 18, 2020

TL* THE CONTACT OWNS A 2021 THOR MAGNITUDE BB35 BUILT ON A 2020 FORD F-550 CHASSIS N/A. THE CONTACT STATED WHILE STATIONARY AT A TRAFFIC LIGHT, WHILE THE DEPRESSING THE ACCELERATOR PEDAL, THE RV MADE AN ABNORMAL NOISE AND STARTED TO ROLL BACKWARDS. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE CONTACT STOPPED THE RV BY DEPRESSING THE BRAKE PEDAL. WHILE SHIFTING TO PARK, THE RV CONTINUED TO ROLL BACKWARDS. THE CONTACT STATED HE USED THE PARKING BRAKES TO KEEP THE RV FROM MOVING. THE RV WAS TAKEN TO WAY SCARFF FORD COMMERCIAL TRUCKS (119 7TH ST NE, AUBURN, WA 98002: (888) 394-6998) WHERE IT WAS DIAGNOSED WITH NEEDING THE DRIVE SHAFT TO BE REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED AS OF YET. THE MANUFACTURER HAD BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS 6,671.

Other Thor Motor Coach Magnitude model years

Check your 2021 Thor Motor Coach Magnitude VIN

Not every recall applies to every VIN in a given year. Enter the 17-character VIN from your Thor Motor Coach Magnitude at nhtsa.gov/recalls to see whether your specific vehicle has an unrepaired recall.

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