No complaints are listed for the 2020 Thor Motor Coach Siesta. NHTSA's API and bulk file list none in this build.
Data build 2026-10-09.
NHTSA lists this vehicle as THOR MOTOR COACH SIESTA.
Model-generated complaint tags: No complaints are listed for tagging.
Recalls
See new recalls and investigations this week.
4 recalls.
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: 2020-05-28. Systems: SERVICE BRAKES, HYDRAULIC, STRUCTURE.
Defect: Thor Motor Coach (TMC) is recalling certain 2020 Daybreak, Four Winds, Delano, Gemini, Quantum, Tiburon, Chateau Citation, Compass, Chateau, Siesta, Freedom Elite, and Synergy motorhomes built on Mercedes Benz Sprinter chassis [platform 907 (VS30)]. The rear part of the fender liner on the front axle may contact and chafe the brake hose, possibly resulting in a loss of brake fluid.
Consequence: If the brake fluid leaks, this may extend the braking distance, increasing the risk of a crash.
Remedy: TMC will notify owners, and an authorized Mercedes-Benz dealer will inspect the brake hoses for chafing and replacement if necessary. The fender liner will also be altered to permit more clearance. All repairs will be performed free of charge. This recall began June 25, 2020. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000191.
Do not drive: No. Park outside: No.
Date: 2020-05-27. Systems: EQUIPMENT, POWER TRAIN.
Defect: Thor Motor Coach (TMC) is recalling certain 2020 Daybreak, Four Winds, Delano, Gemini, Quantum, Tiburon, Chateau Citation, Compass, Chateau, Siesta, Freedom Elite, and Synergy motorhomes built on Mercedes-Benz Sprinter chassis [platform 907 (VS30)] equipped with automatic transmissions. The owner's manual does not correctly specify the certain conditions under which the automatic parking function (excerpt)
Consequence: If a customer were to rely on the Auto-P function as described in the Operator's Manual, the possibility of a vehicle rollaway or unintended vehicle movement cannot be ruled out which could increase the risk of a crash. (excerpt)
Remedy: TMC will notify owners, and a Mercedes Benz dealer will supplement the Operator's Manual with a correct description of the Auto-P function equipped in the vehicle. This recall began June 25, 2020. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000190. (excerpt)
Do not drive: No. Park outside: No.
Date: 2019-10-08. Systems: EQUIPMENT.
Defect: Thor Motor Coach (TMC) is recalling certain 2014 Tuscany 36M, 40E, 2015 Citation 24SL, Siesta 24SL, Axis 25.1 and Vegas 25.1, 2016 Four Winds 31E, 31W, 35SF, Chateau 31E, 31W, Synergy SD24, Citation 24SL, 24SS and Siesta 24SL, 24SS, 2017 Four Winds 31E, 31W, Chateau 31E, 35SD, Citation 24SS and Siesta 24SS, 2018 Citation 24SS and Siesta 24SS, 2019 Quantum CR24, Four Winds 24BL, Citation 24MB and S (excerpt)
Consequence: An inadvertently overloaded motorhome due to an incorrect carrying capacity can increase the risk of a crash. (excerpt)
Remedy: TMC will notify owners, and dealers will issue new OCCC labels with correct seating positions and weight calculations, free of charge. The recall began November 21, 2019. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000176. (excerpt)
Do not drive: No. Park outside: No.
Manufacturer communications
4 manufacturer communications.
Communications by system| System | Count |
|---|
| BACK OVER PREVENTION | 2 |
|---|
| ELECTRICAL SYSTEM | 1 |
|---|
| EQUIPMENT | 1 |
|---|
10200513
Date: 2021-08-19. Type: Service Bulletin/Repair Instructions. Systems: BACK OVER PREVENTION.
On certain Mercedes-Benz Sprinter vans, the MBUX multimedia system software might not meet specifications. Under very specific conditions, the MBUX multimedia system might not start and the display might remain black, or could reboot unintentionally after 50 seconds of initial startup. Accordingly,
10200514
Date: 2021-08-19. Type: Service Bulletin/Repair Instructions. Systems: BACK OVER PREVENTION.
On certain Mercedes-Benz Sprinter vans, the MBUX multimedia system software might not meet specifications. Under very specific conditions, the MBUX multimedia system might not start and the display might remain black, or could reboot unintentionally after 50 seconds of initial startup. Accordingly,
10186660
Date: 2021-01-25. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Procedure for retrofitting units with an Onan 3.2 kW diesel generator to have hour meter function with Firefly system.
10169044
Date: 2019-12-05. Type: Service Bulletin/Repair Instructions. Systems: EQUIPMENT.
This letter stated that there were no Service Bulletins or Technical Service Bulletins issued for the month of November, 2019.