Four times while driving, the STOP ENGINE light came on causing the vehicle to slow to 5 MPH--twice while I was on the freeway in busy traffic--very hazardous. Two different error codes showed after the check engine light came on and then after I stopped and restarted the engine a few hours later, the check engine lights turned off. I took it to a Freightliner repair dealer and the accelerator pedal was defective. I only had 9000+ miles on the vehicle. The error codes were: spn 2623 FMI: 4 oc:6 sa:0 and Spn 91: Spn: 2 oc:3 sa:0. Note: these codes totally reset as if nothing was wrong.
The worst 2020 Thor Motor Coach Aria problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Body1
- Electrical1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Body1
- Electrical1
Recalls 4
Equipment: recreational vehicle/trailer
- What is wrong
- 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.
- Risk
- Adhesive failure may cause the vent portion of the window to detach, increasing the risk of a crash or injury.
- 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.
Recall number 21V522000 · Recall details
Tires: valve
- What is wrong
- 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.
- Risk
- 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.
Recall number 20V559000 · Recall details
Exterior lighting: turn signal
- What is wrong
- 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 the rear marker lights, brake lights, or turn signals not functioning.
- Risk
- 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.
Recall number 20V418000 · Recall details
Service brakes, air: disc: caliper
- What is wrong
- Thor Motor Coach (TMC) is recalling certain 2019-2020 Aria 3401, 3601, 3901, 3902, and Venetian G36, J40, L40, M37, R40, and S40 motorhomes built on DTNA chassis. The brake caliper mounting bolts may have been insufficiently tightened.
- Risk
- Loose brake caliper mounting bolts can reduce brake effectiveness, increasing the risk of a crash.
- Remedy
- DTNA will notify owners, and DTNA dealers will inspect and repair the vehicles, free of charge. The recall began on May 20, 2020. Owners may contact DTNA customer service at 1‑800‑547‑0712 or TMC customer service at 1‑877‑855‑2867.
Recall number 20V167000 · Recall details
Technical service bulletins for the 2020 Thor Motor Coach Aria 1
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
What 2020 Thor Motor Coach Aria owners say
Most recent owner complaints, unedited.
The fresh water tank, which was only half full of water, broke through the floor allowing the tank to drop down to the road. I was pulling into a gas station to fill up with fuel. Luckily it happened before I got on the interstate and would have been traveling at a higher rate of speed. The tank is located in front of the rear dual tires on the pasenger side of the motorhome. At a higher speed, if the tank dragging on the ground would have come loose I would have run over the tank which probably would have caused loosing control or even flipping the motorhome over on its side. The floor appears to be a 1/8” masonite panel held up by screws that is used to support 100 gallons of water when full. That is 830 lbs. Of water plus the tank weight. There is no metal support going across the center of the tank underneath so the entire tank is held by the masonite and screws. Thor customer service told us it is out of warranty and not their problem. Extended warranty said it is a factory defect and not their problem. The customer service at thor would not let us talk to a supervisor . I had already negotiated a deal on a new one but had not signed papers yet. The dealer estimate was $10,000 dollars of which I had to pay $5,000 to keep the deal. Dealer indicated to me that eight other units of this model has had the same thing happen. The floor is dropping down at several other parts of the basement floor. This appeared within six months after purchasing the aria. The thor motorhome should be available at the dealer where it was traded. I had to use a binding ratchet strap to hold the floor and the tank up off the ground with the tank empty.
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Questions about the 2020 Thor Motor Coach Aria
Is the 2020 Thor Motor Coach Aria reliable?
Owners have filed 2 complaints about the 2020 Thor Motor Coach Aria, close to a typical Aria model year.
What is the most common problem with the 2020 Thor Motor Coach Aria?
Body and structure, with 1 complaint. Next is electrical (1).
How many recalls does the 2020 Thor Motor Coach Aria have?
4 recalls, covering equipment, tires and exterior lighting.
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