The 2018 Thor Motor Coach Aria has 2 NHTSA recall campaigns affecting an estimated 4,048 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 2 complaints with NHTSA, most often about the equipment. Last updated July 5, 2026.
Recall campaigns
TIRES20V5590002020-09-151,631 affected
Defect
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
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…
Thor Motor Coach (TMC) is recalling certain 2017-2020 Aria, Venetian and Tuscany, 2017 Tuscany XTE and 2017-2019 Palazzo motorhomes vehicles that received an inspection-only remedy for recall 18V-763. The rear mounted Power Distribution Module (PDM) may have been damaged during manufacturing, possibly resulting in…
Consequence
Non-functioning exterior marker lights can increase the risk of a crash.
Remedy
TMC will notify owners, and Daimler Trucks dealers will replace the PDM, free of charge. Owner letters were mailed October 6, 2021. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000196.
Complaints by component
EQUIPMENT
1
STRUCTURE
1
Total complaints2
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“The contact owns a 2018 freightliner xc-r. The contact stated that one of the windows located at the front end of the motorhome had started to delaminate. The contact used silicone to seal the window; however, he noticed that other windows in the motorhome were also experiencing the same failure.…”
“The contact owns a 2018 freightliner xc-r. The contact stated that one of the windows located at the front end of the motorhome had started to delaminate. The contact used silicone to seal the window; however, he noticed that other windows in the motorhome were also experiencing the same failure.…”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2018 Thor Motor Coach Aria as of
July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page
contains ads and affiliate links. Full methodology.