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When problems were reported
Mileage at the reported incident
Limited mileage data: 1 of 3 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Electrical System. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Exterior Lighting. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Service Brakes. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
0 crash reports0 fire reports0 injury reports
What owners actually said
3 reports
Mileage unknown · Sep 18, 2024
Electrical SystemExterior Lighting
The EATON Power Distribution Modual P\N A66-05172-00 (S\N 18108065) in my motorhome was in a recall associated with the failed rear tail lights, rear turn signals, brack lights, running lights and failure of towed vehicle lights plug. The modual was repaired as a result of the recall and was working properly. The repaired Modua…
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The EATON Power Distribution Modual P\N A66-05172-00 (S\N 18108065) in my motorhome was in a recall associated with the failed rear tail lights, rear turn signals, brack lights, running lights and failure of towed vehicle lights plug. The modual was repaired as a result of the recall and was working properly. The repaired Modual failed again in less than 1000 miles driven resulting in no passenger tail light, no brake lights, no running lights, and no function of the towed vehicle lights plug. The recall on my PDM P\N A66-05172-00 was not successful as the PDM is not working and is a safety concern.
NHTSA ODI #11615219
15,000 miles · Feb 21, 2023
Service BrakesService Brakes, Air
The contact owns a 2020 Thor Palazzo built on a 2020 Freightliner X line chassis. The contact stated that while driving approximately 55 MPH during a storm, the air brakes system alarm illuminated. The contact immediately pulled over to the side of the roadway and turned off the RV. The RV was towed to the dealer who informed th…
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The contact owns a 2020 Thor Palazzo built on a 2020 Freightliner X line chassis. The contact stated that while driving approximately 55 MPH during a storm, the air brakes system alarm illuminated. The contact immediately pulled over to the side of the roadway and turned off the RV. The RV was towed to the dealer who informed the contact that the air brake system had a pig tail that led into the transducer that had caused the chord to fracture. The dealer dried the moisture from the area and sprayed the area with silicon. The failure reoccurred approximately a year later when the contact had driven the RV during inclement weather. The vehicle was taken to another dealer who replaced the pig tail and transducer. The contact was informed by the dealer that due to the pig tail being attached so tightly and having no flexibility, the failure might recur. The manufacturer had been made aware of the failure. The failure mileage was approximately 15,000.
NHTSA ODI #11508333
Mileage unknown · Sep 28, 2021
Structure
The lower passenger side bracket between the fiberglass front of the body and the freightliner frame has released from the frame and is in danger of falling off. If this thing did come off and go bouncing down the road it could do some real damage. Noticed after other owners warned about the problem online.
Thor Motor Coach (TMC) is recalling certain 2015-2023 Palazzo recreational vehicles. The front lower cap brackets that support the front fiberglass panel may become loose and detach from the vehicle while in motion.
Consequence & remedy
Consequence: A detached bracket can become a road hazard, increasing the risk of a crash.
Remedy: Dealers will inspect and replace the front lower brackets, as necessary, free of charge. Owner notification letters were mailed March 15, 2023. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000291.
Thor Motor Coach (TMC) is recalling certain 2018-2021 Aria, Palazzo, Tuscany, and Venetian motorhomes built on a Daimler Trucks (DTNA) chassis. The tire valve stem extension for the inner wheel may contact the outer wheel rim opening and become damaged.
Consequence & remedy
Consequence: Extensive damage to the valve stem extension may result in a loss of tire pressure of the inner wheel, increasing the risk of a crash.
Remedy: TMC will notify owners, and DTNA dealers will inspect the inner wheel valve stem stabilizers, and adjust as needed and/or replace the inner valve stem, free of charge. The recall began November 2, 2020. Owners may contact TMC customer service at 1-800-524-5210 extension 104 or DTNA customer service at 1-800-547-0712. TMC's number for this recall is RC000204. DTNA's number for this recall is FL-861.
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 & remedy
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.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0
No exact-year investigations in this snapshot.
2020 Thor Motor Coach Palazzo Problems, Complaints & Recalls | Skip That Year