Use cautionVehicle recall · NHTSA · Published June 30, 2019
Thor Motor Coach Challenger 2020 Recall: Slide-Out Room Movement Risk
Thor Motor Coach is recalling 2019-2020 Challenger motorhomes due to potential unexpected movement of the slide-out room, which could increase injury risk. Owners should contact customer service for free software updates.
Thor Motor Coach is recalling certain 2019-2020 Challenger motorhomes because their vehicle control software may cause the slide-out room to move unexpectedly, potentially increasing injury risk. Affected owners should contact TMC customer service for free software updates to address the issue. Read more at govinfonow.com/recall/80101-thor-motor-coach-challenger-2020-recall-slide-out-room-movement.
“Thor Motor Coach Challenger 2020 Recall: Slide-Out Room Movement Risk.” GovInfoNow, updated August 18, 2026. https://govinfonow.com/recall/80101-thor-motor-coach-challenger-2020-recall-slide-out-room-movement. Based on NHTSA recall #19V504000 (https://www.nhtsa.gov/recalls?nhtsaId=19V504000).
Thor Motor Coach recalled certain Challenger, Miramar, Magnitude, Outlaw, Omni, and Palazzo motorhomes because the vehicle control system software may cause the slide-out room to move unexpectedly, increasing injury risk, according to the National Highway Traffic Safety Administration (NHTSA) on June 30, 2019. Dealers will update the affected software free of charge.
How to tell if you have it
Thor Motor Coach Challenger, 2019-2020
Thor Motor Coach Magnitude, 2019-2020
Thor Motor Coach Miramar, 2019-2020
Thor Motor Coach Omni, 2019-2020
Thor Motor Coach Outlaw, 2019-2020
Thor Motor Coach Palazzo, 2019-2020
What to do
TMC will notify owners, and dealers will update the affected software, free of charge. The recall is expected to begin August 28, 2019. Owners may contact TMC customer service at 1-877-855-2867.
The hazard
The vehicle control system software may cause the slide-out room to move unexpectedly, which can increase the risk of an injury.
Context
Thor Motor Coach has 93 other recalls on record since September 9, 2010. Recent Thor Motor Coach recalls include a November 17, 2025 notice regarding solar panel detachment risks and an October 17, 2025 recall for Quantum models involving LP hose fire risks. Other recent recalls of similar products include a July 14, 2026 Ford Explorer seats recall, a December 9, 2025 Thomas Built Buses Saf-T-Liner C2 unsecured wheelchair risk notice, and a September 6, 2026 Ford F-150 power train recall.
How to tell if you have this one
Check for 2019-2020 Challenger, Miramar, Magnitude, Outlaw, Omni, or Palazzo motorhomes. The recall began August 28, 2019, and TMC will notify owners of the software update.
Brand
Thor Motor Coach
Category
Vehicle
Based on the official NHTSA remedy
What to do — step by step
Contact TMC Customer Service
Call 1-877-855-2867 to schedule a software update for your motorhome.
Update Vehicle Software
Dealers will provide a free software update to fix the unexpected movement issue.
Official remedy
What NHTSA says to do
TMC will notify owners, and dealers will update the affected software, free of charge. The recall is expected to begin August 28, 2019. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000170.
How this recall unfolded
Recall timeline
1NHTSA received the defect report
2Recall expected to begin (expected, per the notice)
Dates from the agency record only; steps without a date are left out.
Take action
Contact Thor Motor Coach
We’ve drafted a message you can send Thor Motor Coach to request your refund or repair — edit it as you like.
Subject: Recall 19V504000 — Thor Motor Coach Challenger 2020 Recall: Slide-Out Room Movement Risk
Hello,
I own a Thor Motor Coach Challenger 2020 Recall: Slide-Out Room Movement Risk that is covered by recall 19V504000 from Thor Motor Coach.
The official recall notice states: TMC will notify owners, and dealers will update the affected software, free of charge. The recall is expected to begin August 28, 2019. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000170.
I’m writing to arrange the remedy described in the recall (a refund, repair, or replacement as applicable). Could you please tell me the next steps to resolve this?
Thank you.
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
Plain-language summary written by qwen3:4b on August 18, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.