Thor Motor Coach Ace Problems by Model Year
NHTSA recorded 17 consumer complaints across the 3 model years of the Thor Motor Coach Ace (2015–2018) that have at least 5 complaints. 2016 has the most, with 7. Across all years, the part named most often is other or unknown (5 mentions). Pick a model year below to see its parts, mileage, recalls and service bulletins.
All Ace model years
Years with fewer than 5 complaints are not listed. The score compares years of the same model, allowing for the era and for how long each year has collected complaints: 50 is a typical year, lower means fewer complaints. It is not adjusted for sales volume.
| Year | Complaints | Median mi | Recalls | TSBs | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|
| 2018 | 5 | 1,300 | 3 | 2 | — | Not enough data |
| 2016 | 7 | 8,700 | 5 | 2 | — | Not enough data |
| 2015 | 5 | 20,500 | 4 | 2 | — | Not enough data |
Parts named most often, all years
Counts add up complaint mentions across the listed years. A complaint can name several parts.
- Other or unknown5 28%
- Body and structure3 17%
- Latches, locks and linkages3 17%
- Electrical system3 17%
- Visibility (wipers, defrost, mirrors)1 5.6%
- Transmission and drivetrain1 5.6%
- Suspension1 5.6%
- Steering1 5.6%
Example complaints
One per model year, chosen for length and detail. Personal details are removed. They are consumer reports, not findings.
2018: “Underrated circuit breaker, 15 amp vice 20 amp, rating for rear air conditioner. Forward air conditioner, same model and size, has correct 20 amp circuit breaker. Overrated fuse d8, 20 amp vice 15 amp, on ceiling lights. This was found while stationary troubleshooting a water leak. I decided to see what spare fuses I may need and I noted these discrepancies.”
NHTSA complaint #11091394, filed 2018-05, 161 miles2016: “The exterior door lock made by tri-mark broke trapping me and my family inside. The rv was parked at the time. The door lock had to be disassembled for us to be able to open the door. Had their been a fire or some other emergency this would have caused loss of life. This is a well known issue for many of their locks.”
NHTSA complaint #11130238, filed 2018-09, 8,700 miles2015: “After smelling a burnt smell, I investigated and found burnt and melted wire nuts within the power transfer switch. Numerous same issues are reported on the thor rv blog site. It appears that theh wire nuts commonly used in household construction come loose when used in a moving vehicle.”
NHTSA complaint #11114432, filed 2018-07, 21,000 milesOther Thor Motor Coach models
33 complaintsThor Motor Coach Windsport
27 complaintsThor Motor Coach Challenger
23 complaintsThor Motor Coach Hurricane
14 complaintsThor Motor Coach Miramar
13 complaintsThor Motor Coach Scope
12 complaintsThor Motor Coach Magnitude
9 complaintsThor Motor Coach Outlaw
7 complaints
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Methodology