2020 Thor Motor Coach Magnitude problems: recalls, complaints and what to check
NHTSA has 6 recalls and 2 owner complaints on file for the 2020 Thor Motor Coach Magnitude. Here is what they are, what a technician checks for each kind of fault, and how to look one over before you buy it.
Other: 2 recalls
Recall 19V566000 (01/08/2019): EQUIPMENT
Thor Motor Coach (TMC) is recalling certain 2019-2020 Omni and Magnitude motorhomes. The battery tray may be improperly welded to the chassis frame, allowing the battery tray to detach from the chassis.
Fix: TMC has notified owners, and dealers will weld on an additional support to the battery tray, free of charge. The recall began August 8, 2019. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000171.
Recall 19V504000 (30/06/2019): EQUIPMENT:RECREATIONAL VEHICLE/TRAILER
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.
Fix: 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.
Doors, windows, steps and lights: 2 recalls
Recall 19V240000 (27/03/2019): VISIBILITY:REARVIEW MIRRORS/DEVICES
Thor Motor Coach (TMC) is recalling certain 2018 Thor Chateau and Four Winds motorhomes and 2019-2020 Magnitude and Omni motorhomes. The backup camera displays may revert back to the factory default settings which may cause the camera image to be reversed.
Fix: TMC will notify owners, and dealers will install a harness to install that will prevent the image from inverting, free of charge. The recall began April 30, 2019. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000168.
Recall 19V786000 (01/11/2019): SEATS:FRONT ASSEMBLY:RECLINER
Thor Motor Coach (TMC) is recalling certain 2019-2020 Magnitude and Omni motorhomes. The seat recliner mechanisms may be missing the third pawl required for seat back strength, resulting in a loose seat back. These vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 202, "Head Restraints" and 207, "Seating Systems."
Fix: Ford has notified TMC owners, and Ford dealers will inspect the seat structures and replace them, as necessary, free of charge. The recall began October 21, 2019. Owners may contact Ford customer service at 1-866-436-7332 or TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000178.
What a tech checks: Mostly adjustments and wear: steps that stop halfway on a bad switch, doors out of alignment after a slide shifted, exterior lights with a corroded ground. Before you buy: Every door, lock, window and light.
LP gas and gas appliances: 1 recall
Recall 22V094000 (18/02/2022): EQUIPMENT:RECREATIONAL VEHICLE/TRAILER:LPG SYSTEMS:LINES AND FITTINGS
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.
Fix: 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.
What a tech checks: Regulator, lines and fittings, then the appliances: furnace, water heater, range. A proper pressure-drop leak test is the first thing a tech does on an LP complaint. Before you buy: Smell for gas with the tank open; have a shop do the leak test.
LP and furnace lessons · Furnace guide · Furnace 3D lab · Water heater 3D lab
12 volt and 120 volt electrical: 1 recall
Recall 19V417000 (05/06/2019): ELECTRICAL SYSTEM:WIRING
Thor Motor Coach (TMC) is recalling certain 2019-2020 Magnitude, Omni motorhomes, models BB35 and BH35. Wires located in the electrical junction box may move around and contact an extra screw that was errantly installed.
Fix: TMC will notify owners, and dealers will inspect the junction box and remove the extra screw, and repair any damaged wiring, as necessary, free of charge. The recall began July 15, 2019. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000169.
What a tech checks: Voltage drop, grounds, the converter and the transfer switch. Melted shore-cord plugs and bad grounds cause most of the electrical complaints techs actually see. Before you buy: Battery at rest, converter output on shore power, GFCI test, every outlet.
12 V electrical lessons · 120 V and generator lessons · Wiring diagrams
Structure, roof and leaks: 2 complaints
What a tech checks: Roof sealant, seams, window and slide seals, and the frame. Water intrusion shows up as delamination, soft floors and stained ceilings months after the leak started. Before you buy: Press the sidewalls and walk the floor; look at every seam and seal.
Roof, leaks and body lessons · Seals and leaks guide
What owners reported to NHTSA
09/10/2021, STRUCTURE: 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. I have read on Thor forums that countless other owners are having similar problems, which stems from the front cap not being secured/installed correctly. This includ
08/11/2021, STRUCTURE: The cabover cap that attaches to the main RV body is coming loose and appears to be separating from the body.
Looking at a 2020 Thor Motor Coach Magnitude?
The Buyer's Check walks you through it on your phone: what to ask, the outside walk-around, water damage, every system on every power source, with the recalls above built in. You get a report that says what's a walk-away and what to negotiate on.
Checked against NHTSA 2026-10-23. Recall repairs are free at an authorized dealer. Complaints are owner reports to NHTSA and are not verified.