NHTSA vehicle safety data

2020 Thor Motor Coach Miramar Recalls & Complaints

The 2020 Thor Motor Coach Miramar 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 2020 Thor Motor Coach Miramar. Recall data is refreshed daily from NHTSA.

2020 Thor Motor Coach Miramar owner complaints

Owners have filed 3 complaints with NHTSA about the 2020 Thor Motor Coach Miramar, describing incidents dated February 16, 2021 to August 25, 2023.

Most-cited components

  • Electrical System 1 complaint
  • Engine 1 complaint
  • Parking Brake 1 complaint
  • Visibility/Wiper 1 complaint

Of the 3 complaints on file, 1 reports a fire (owner-reported, not verified by NHTSA).

Newest complaints

  • ODI #11541103 · Filed

    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…

  • ODI #11425335 · Filed

    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 a…

  • ODI #11422330 · Filed

    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 a…

Read all 3 complaints

NHTSA defect investigations

NHTSA's investigations file lists the 2020 Thor Motor Coach Miramar in 1 investigation. A listed model year means only that an investigation names it; it says nothing about any particular vehicle. An open investigation is not a finding that a safety defect exists, and NHTSA can close one without a recall.

Open and recently closed NHTSA defect investigations

Window Adhesive Failure

NHTSA #21V522000 · Structure · NHTSA notice

Reported July 8, 2021 · Thor Motor Coach

Potentially affected: 521 vehicles

Repair completion: 55.85% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Thor Motor Coach campaign RC000232 · Owners notified September 8, 2021

Defect description

Thor Motor Coach (TMC) is recalling certain 2019 Challenger, Palazzo, Tuscany, 2019-2020 Miramar, 2019-2021 Aria, Outlaw, and Venetian recreational vehicles equipped with Hehr 6400 series windows. The adhesive that bonds the vented portion of the window may fail.

Safety consequence

Adhesive failure may cause the vent portion of the window to detach, increasing the risk of a crash or injury.

Manufacturer remedy

Dealers will inspect the windows, and replace the vent if necessary, free of charge. Owner notification letters were mailed September 8, 2021. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000232.

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.

Slide Room may Move

NHTSA #19V504000 · Equipment — Recreational Vehicle/Trailer · NHTSA notice

Reported June 30, 2019 · Thor Motor Coach

Potentially affected: 1,554 vehicles

Repair completion: 84.55% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Thor Motor Coach campaign RC000170 · Owners notified August 1, 2019 · Vehicles built March 23, 2018 – June 20, 2019 (per NHTSA)

Defect description

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.

Safety consequence

Unexpected movement of the slide-out room can increase the risk of a injury.

Manufacturer 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.

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.safercar.gov.

Other Thor Motor Coach Miramar model years

Check your 2020 Thor Motor Coach Miramar VIN

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

Check a Thor Motor Coach VIN