No complaints are listed for the 2021 Thor Motor Coach Quantum. NHTSA's API and bulk file list none in this build.
Data build 2026-10-09.
NHTSA lists this vehicle as THOR MOTOR COACH QUANTUM.
Model-generated complaint tags: No complaints are listed for tagging.
Recalls
See new recalls and investigations this week.
4 recalls.
Date: 2020-11-17. Systems: ELECTRICAL SYSTEM.
Defect: Thor Motor Coach (TMC) is recalling certain 2020-2021 Daybreak, Four Winds, Chateau, Freedom Elite, Quantum motorhomes built on a Chevrolet chassis. The BIM (Battery Isolation Manager)/BIR (Battery Isolation Relay) is not watertight when exposed to engine compartment heat.
Consequence: Water may get into the BIM/BIR and create electrical arcing, increasing the risk of a fire.
Remedy: TMC will notify owners, and dealers will replace the BIM/BIR with a Trombetta solenoid, free of charge. The recall began January 13, 2021. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000206.
Do not drive: No. Park outside: No.
Date: 2020-07-29. Systems: AIR BAGS, ELECTRICAL SYSTEM, SEATS.
Defect: Thor Motor Coach (Thor) is recalling certain 2020-2021 Daybreak, Four Winds, Quantum, Delano, Tiburon, Chateau and Freedom Elite motorhomes and 2020 Gemini, Chateau Citation, Compass, Siesta, and Synergy motorhomes built on Sprinter Van chassis (platform 970 (VS30), equipped with swivel seats. The wiring harnesses for the front seats may have been routed incorrectly and could become jammed and da (excerpt)
Consequence: If the wiring harness is damaged, the side air bag within the seat may deploy inadvertently or not deploy as designed in the event of a crash, increasing the risk of injury to vehicle occupants. (excerpt)
Remedy: Thor will notify owners, and Mercedes-Benz dealers will inspect the wire harness routing for both front seats and will repair the wiring and add clips or cable ties as needed, free of charge. This recall began August 13, 2020. Owners may contact Thor customer service at 1-877-855-2867 Mercedes-Benz customer service at 1-877-762-8267. Thor's number for this recall is RC000200. (excerpt)
Do not drive: No. Park outside: No.
Date: 2020-07-20. Systems: ELECTRICAL SYSTEM.
Defect: Thor Motor Coach (TMC) is recalling certain 2021 Daybreak, Four Winds, Quantum, Chateau, and Freedom Elite motorhomes built on the 2020 Ford E-Series chassis. The battery cable may not have been properly secured within the chassis rail, which can cause it to contact the exhaust manifold and heat shield.
Consequence: Battery cable contact with the exhaust manifold and heat shield can increase the risk of a fire.
Remedy: TMC will notify owners, and dealers will inspect the routing of the battery cable. If needed the cable will be re-routed and properly secured, free of charge. This recall began September 11, 2020. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000197.
Do not drive: No. Park outside: No.
Date: 2020-05-27. Systems: ELECTRICAL SYSTEM, ELECTRONIC STABILITY CONTROL (ESC), SERVICE BRAKES, HYDRAULIC.
Defect: Thor Motor Coach (TMC) is recalling certain 2020-2021 Quantum, Chateau and Four Winds, and 2020 Vegas and Axis motorhomes built on a Ford E-series chassis. A wire 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 anti-lock braking system (ABS). (excerpt)
Consequence: Damage to the fuel pump circuit in the wiring harness could result in an unexpected engine stall. Damage to the ABS wiring can lead to reduction of ABS functionality and a loss of roll stability control (RSC) functionality. These scenarios increase the risk of a crash. (excerpt)
Remedy: TMC will notify owners, and Ford dealers will inspect the wire harness for damage. If no damage is found, dealers will apply anti-abrasion tape over the area and ensure clearance to surrounding components. If damage is found, dealers will splice in new wire and apply anti-abrasion tape over the area and ensure clearance to surrounding components. All services will be performed free of charge. (excerpt)
Do not drive: No. Park outside: No.
Manufacturer communications
6 manufacturer communications.
Communications by system| System | Count |
|---|
| ELECTRICAL SYSTEM | 2 |
|---|
| ENGINE AND ENGINE COOLING | 2 |
|---|
| SERVICE BRAKES | 2 |
|---|
10197979
Date: 2021-06-09. Type: Service Bulletin/Repair Instructions. Systems: SERVICE BRAKES.
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 the bolt, and in the worst case and with ongo
10197980
Date: 2021-06-09. Type: Service Bulletin/Repair Instructions. Systems: SERVICE BRAKES.
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 the bolt, and in the worst case and with ongo
10189723
Date: 2021-03-24. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
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 option
10189724
Date: 2021-03-24. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
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 option
10197904
Date: 2021-02-18. Type: Service Bulletin/Repair Instructions. Systems: ENGINE AND ENGINE COOLING.
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 conditions. This may result in elevated tempera
10197965
Date: 2021-02-18. Type: Service Bulletin/Repair Instructions. Systems: ENGINE AND ENGINE COOLING.
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 conditions. This may result in elevated tempera