NHTSA vehicle safety data

2021 Thor Motor Coach A.C.E. Recalls & Complaints

The 2021 Thor Motor Coach A.C.E. has 1 NHTSA recall campaign and 3 owner complaints on file as of November 3, 2026. Recall repairs are usually free at an authorized Thor Motor Coach dealer.

NHTSA recall and complaint data for the 2021 Thor Motor Coach A.C.E.. Recall data is refreshed daily from NHTSA.

2021 Thor Motor Coach A.C.E. owner complaints

Owners have filed 3 complaints with NHTSA about the 2021 Thor Motor Coach A.C.E., describing incidents dated May 3, 2021 to July 6, 2024.

Most-cited components

Electrical System 2 complaints
Engine 1 complaint
Power Train 1 complaint
Suspension 1 complaint
Vehicle Speed Control 1 complaint

Newest complaints

ODI #11600287 · Filed July 8, 2024
Air conditioner compressor wouldn't engage in rv. Called a mobile technician. Mobile technician found burnt and melted connectors on the control board. Technician stated the connectors used for 120v power were 12v crimp connectors and had burned and melted from the amperage. Technician stated that…
ODI #11438528 · Filed October 28, 2021
Returning home from trip, route US I26 in NC, heading down 6 degree hill lost all speed control. The following dash lights came on: ABS, Engine Service, the Wrench, anti sway control. We were able to roll to the side of the road just before an entrance ramp. There was no acceleration control.
ODI #11435409 · Filed October 4, 2021
The contact owns a 2021 Thor Motor Coach Ace RV. The contact received notification of NHTSA Campaign Number: 21V202000 (Suspension, Power Train) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the…

Read all 3 complaints

Frameless Window Glass Panels May Detach

NHTSA #20V339000 · Visibility — Glass, Side/Rear · NHTSA notice

Reported June 9, 2020 · Thor Motor Coach

Potentially affected: 71 vehicles

Repair completion: 100% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Thor Motor Coach campaign RC000192 · Owners notified July 10, 2020

Defect description

Thor Motor Coach (TMC) is recalling certain 2020-2021 ACE, 2021 Four Winds and 2020 Gemini, Axis, Compass, Delano, Windsport, Hurricane, Outlaw, and Vegas motorhomes. The adhesive 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 out.

Safety consequence

If the window glass detaches while the vehicle is moving it could become a projectile, increasing the risk of a crash.

Manufacturer remedy

TMC will notify owners, and dealers will inspect the frameless windows for proper adhesive bond strength, replacing the windows as necessary, free of charge. The recall began July 10, 2020. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000192.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

try.vin has no NCAP crash-test rating on file for the 2021 Thor Motor Coach A.C.E.. NHTSA rates some vehicles by body style — pickups by cab, vans by roof height — so check nhtsa.gov/ratings.

3 owner complaints have been filed with NHTSA for the 2021 Thor Motor Coach A.C.E..

Electrical System

ODI #11600287

Incident: July 6, 2024 · Filed: July 8, 2024

Air conditioner compressor wouldn't engage in rv. Called a mobile technician. Mobile technician found burnt and melted connectors on the control board. Technician stated the connectors used for 120v power were 12v crimp connectors and had burned and melted from the amperage. Technician stated that these used connectors were illegal to use for 120v. This is a safety concern and could result in a fire. Stated we were lucky the control board melted and didn't result in a fire and burn down the coach.

Electrical System; Vehicle Speed Control; Engine

ODI #11438528

Incident: October 22, 2021 · Filed: October 28, 2021

Returning home from trip, route US I26 in NC, heading down 6 degree hill lost all speed control. The following dash lights came on: ABS, Engine Service, the Wrench, anti sway control. We were able to roll to the side of the road just before an entrance ramp. There was no acceleration control.

Suspension; Power Train

ODI #11435409

Incident: May 3, 2021 · Filed: October 4, 2021

The contact owns a 2021 Thor Motor Coach Ace RV. The contact received notification of NHTSA Campaign Number: 21V202000 (Suspension, Power Train) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The local dealer and the manufacturer were made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

Other Thor Motor Coach A.C.E. model years

Check your 2021 Thor Motor Coach A.C.E. VIN

Not every recall applies to every VIN in a given year. Enter the 17-character VIN from your Thor Motor Coach A.C.E. at nhtsa.gov/recalls to see whether your specific vehicle has an unrepaired recall.

Check a Thor Motor Coach VIN