The 2020 Thor Motor Coach Miramar has 1 NHTSA recall campaign affecting an estimated 1,554 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 4 complaints with NHTSA, most often about the electrical system. Last updated July 5, 2026.
Recall campaigns
EQUIPMENT19V5040002019-06-301,554 affected
Defect
Thor Motor Coach (TMC) is recalling certain 2019-2020 Challenger, Miramar, Magnitude, Outlaw, Omni, and Palazzo motorhomes. The vehicle control system software may cause the slide-out room to move unexpectedly.
Consequence
Unexpected movement of the slide-out room can increase the risk of a injury.
Remedy
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.
Complaints by component
ELECTRICAL SYSTEM
1
ENGINE
1
PARKING BRAKE:DRIVELINE:HYDRAULIC:ACTUATOR
1
1fires
VISIBILITY/WIPER
1
Total complaints4
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“While driving on the highway at 60 mph in a thunderstorm, the passenger windshield wiper collided with the driver's windshield wiper and became entangled with each other. I completely lost all wiper function and could no longer see the road. This was a life-threatening situation, with traffic all…”
“You have a technical service bulletin 20-2370 issued 09 november 2020 for this vehicle, so no notice to consumers until the issue arises and their mechanic figures it out. The issue causes an extreme heat build up that melts spark plug wires, causes loss of power and/or misfiring, and could cause…”
“You have a technical service bulletin 20-2370 issued 09 november 2020 for this vehicle, so no notice to consumers until the issue arises and their mechanic figures it out. The issue causes an extreme heat build up that melts spark plug wires, causes loss of power and/or misfiring, and could cause…”
“The contact owns a 2021 thor motor coach miramar rv. The contact stated while driving at 50 mph, the contact’s husband saw smoke and flames coming from underneath the front driver’s side undercarriage. The driver pulled the vehicle over to the side of the roadway and exited the vehicle and saw…”
Defect investigations
InvestigationPE24023 Opened 2024-08-14 · closed 2026-01-16
Trailer Hitch Receiver Structure May Crack and Separate
The Office of Defects Investigation (ODI) opened this Preliminary Evaluation, PE24023, on August 14, 2024, to investigate allegations of Thor Motor Coach motorhome frame or trailer hitch structure cracking and separating. The hitch was manufactured by Lippert and installed by Thor as standard original equipment. ODI…
InvestigationPE24023 Opened 2024-08-14 · closed 2026-01-16
Trailer Hitch Receiver Structure May Crack and Separate
The Office of Defects Investigation (ODI) opened this Preliminary Evaluation, PE24023, on August 14, 2024, to investigate allegations of Thor Motor Coach motorhome frame or trailer hitch structure cracking and separating. The hitch was manufactured by Lippert and installed by Thor as standard original equipment. ODI…
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2020 Thor Motor Coach Miramar as of
July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page
contains ads and affiliate links. Full methodology.