Model year

2021 Thor Motor Coach Four Winds

Other, gasoline, built in United States. Owner complaints on file from Jun 24, 2021 to Dec 12, 2024.

Recall campaigns covering this model year93,099 vehicles or units across those campaigns
Owner complaints2Close to the median 2021 other
Severity index0.02021 others average 7.1
First 24 months1Complaints in its first two years
Complaints over time

Complaints about the 2021 Thor Motor Coach Four Winds peaked in 2021, with 1 filed

Owner complaints about this model year, by the year they were filed with NHTSA.

00.250.50.7512021120222023202420252026
Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

50% of complaints about the 2021 Thor Motor Coach Four Winds name equipment

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

Equipment
1
Steering
1
Structure
1
Speed control
1
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

9 recall campaigns cover the 2021 Thor Motor Coach Four Winds

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Recall campaigns for the 2021 Thor Motor Coach Four Winds
CampaignFiledSubjectComponentVehiclesRemedy
20V-718Nov 19, 2020Saddle valve securing bolt may be overtightened, possibly damaging the o-ring seal and causing a continuous gas leakEquipment190Repair or modification
20V-711Nov 17, 2020BIM (Battery Isolation Manager)/BIR (Battery Isolation Relay) is not watertight when exposed to engine compartment heatElectrical system1,074Part replacement
20V-458Aug 5, 2020Bolts of the wrong size were used to secure the barrel chair pedestals, allowing the pedestal to separate from the floor in the event of a crashSeat belts248Inspection
20V-444Jul 29, 2020Wiring harnesses for the front seats may have been routed incorrectly and could become jammed and damaged in the swivel seat framesAirbags463Repair or modification
20V-423Jul 22, 2020100amp converter breaker was incorrectly installed at the battery tray when a 70amp breaker is required, possibly resulting in the wiring…Electrical system934Part replacement
20V-419Jul 20, 2020Battery cable may not have been properly secured within the chassis rail, which can cause it to contact the exhaust manifold and heat shieldElectrical system63Repair or modification
20V-339Jun 9, 2020Adhesive bond between the glass and the metal hinge frame of the frameless windows may fail which would then allow the glass to detach and fall outVisibility and wipers71Part replacement
20V-303May 27, 2020Wire harness in the rear of the vehicle may contact the vehicle frame, resulting in damage to the circuits that support the fuel pump and the…Electrical system34Repair or modification
20V-178Mar 25, 2020Rear axle differential may have an insufficient amount of fluid, possibly resulting in a failure of the rear axle assembly and a driveshaft separationPowertrain22Part replacement
Source: NHTSA ODI recalls file.
Owner complaints

What owners reported about the 2021 Thor Motor Coach Four Winds

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

2 complaints on file, page 1 of 1.

  1. Filed Dec 12, 2024Failure Aug 5, 2024Longview, WARecreational vehicle/trailer, Body

    My wife and I were driving Westbound on [XXX] in Washington state just East of Seattle when the driver side slide out went out on its own while my wife was sleeping on the couch. After taking it to the center it was purchased at they told me it was a failure of the safety retainers on the locking dogs that keep the unit secure when retracted. The manufacturer denied to repair. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

    NHTSA complaint 11630380
  2. Filed Jun 24, 2021Failure Apr 10, 2021Saint Peter, MNSteering, Vehicle speed control

    When driving with cruise control on and encounter a slight side wind or even a grade change in road surface where the coach is not perfectly level the cruise will quit and hill decent light comes on, will not rest until it is shut off for 10 min or so. It is a issue with steering angle sensor, I can be driving perfectly straight but if the steering wheel is turned off center for more than a half mile or so even though going straight , the cruise will quit. it can happen multiple times in a 300 mile trip, may not even work for the whole trip. or on a nice day straight road no wind it will be just fine. it is a correlation of steering angle to wheel turn angle, needs more range/allowance.

    NHTSA complaint 11422162
Source: NHTSA ODI complaints file.
Investigations

NHTSA has not opened an investigation on this model year

Source: NHTSA ODI investigations file.
Service bulletins

7 manufacturer communications cover this model year

Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall.

  • RC000220SAOwner Jun 9, 2021 · Service Bulletin/Repair Instructions
    MBAG has determined that on certain model year 2019-2020 Sprinter vehicles, the retaining washer on the bolt that connects the brake pedal to its bearing block could come loose. If the retaining washer were to come loose, over time it could detach from th…
  • RC000220SADealer Jun 9, 2021 · Service Bulletin/Repair Instructions
    MBAG has determined that on certain model year 2019-2020 Sprinter vehicles, the retaining washer on the bolt that connects the brake pedal to its bearing block could come loose. If the retaining washer were to come loose, over time it could detach from th…
  • RC000221SAOwner Apr 1, 2021 · Service Bulletin/Repair Instructions
    According to the tire manufacturer, Continental Tire the Americas (CTA), the affected tires may have an overcure condition and CTA has initiated a safety recall for these tires. According to CTA, overcured tires may experience a carcass break in the sidew…
  • RC000212SAOwner Feb 18, 2021 · Service Bulletin/Repair Instructions
    On your vehicle, it may be possible that the engine cover insulation does not fully extend to the perimeter of the factory engine cover. In addition, vehicles built on a Ford chassis may have higher engine compartment temperatures during certain idle cond…
  • RC000212SADealer Feb 18, 2021 · Service Bulletin/Repair Instructions
    On your vehicle, it may be possible that the engine cover insulation does not fully extend to the perimeter of the factory engine cover. In addition, vehicles built on a Ford chassis may have higher engine compartment temperatures during certain idle cond…
  • TSB 21-01 Mar 24, 2021 · Service Bulletin/Repair Instructions
    From November 2020 to February 2021, units produced at Plant 250 have a wire missing that would cause the 120VAC load shedding to not work properly. This affects model year 2021 31E, 31EV, 31W, 31WV, SL31, SE31, LF31, and WS31 floor plans with the 2 A/C o…
  • TSB 20-01 Mar 24, 2021 · Service Bulletin/Repair Instructions
    From November 2020 to February 2021, units produced at Plant 250 have a wire missing that would cause the 120VAC load shedding to not work properly. This affects model year 2021 31E, 31EV, 31W, 31WV, SL31, SE31, LF31, and WS31 floor plans with the 2 A/C o…
Source: NHTSA manufacturer communications files.