AI Damage2018 Thor Motor Coach Tuscany: common problems
Owners of the 2018 Thor Motor Coach Tuscany filed 5 complaints with NHTSA, most often about structure and equipment. The maker issued 2 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 5
- Technical service bulletins (TSB)
- 2
What fails most often
- 1 Structure 60% of all complaints
- 2 Equipment 20% of all complaints
- 3 Electrical system 20% of all complaints
- 4 Wheels 20% of all complaints
- Structure: 3 complaints (60% of all).
- Equipment: 1 complaints (20% of all); manufacturer bulletins for this component: 1.
- Electrical system: 1 complaints (20% of all).
- Wheels: 1 complaints (20% of all).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Structure | 3 | 0 | 0 |
| Equipment | 1 | 0 | 1 |
| Electrical system | 1 | 0 | 0 |
| Wheels | 1 | 0 | 0 |
| Engine | 0 | 0 | 1 |
| Fuel system | 0 | 0 | 1 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
On Sunday afternoon 20 June while traveling westbound on I-10 about 50 miles east of Ft. Stockton, TX, the passenger side rear slideout extended on its own. This slideout is about 2 feet deep so the width of my motor home suddenly changed from 8.5 feet wide to 10.5 feet wide.
Right tag axle hub cap broke lose from the bracket securing the hub cap to the hub and departed the motorhome chassis. Incident occurred while traveling east on I-10 in Texas somewhere between San Antonio and Weimer. The hub cap bracket separated at the feet of the bracket.
Floors in the underside pass-through storage compartments and compartments holding the water tanks is composed of a very thin layer of plywood sandwiched between two layers of very thin aluminum. This material is not waterproof and has delaminated, causing the flooring to lose its rigidity.
The flooring in the underside pass-through storage compartments is composed of a very thin layer of plywood sandwiched between two layers of a very thin aluminum. This material is not waterproof and has separated causing the flooring to loose it's rigidity.
In the thor motor coach tuscany 38sq the batteries are stored in a box that is only accessible from within the motorhome. It is in the sleeping area. Gases from the batteries that are not sealed can escape to the interior of the sleeping area and are a safety hazard for the occupants.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 14,282 of 36,656 model years in the NHTSA data (top 39% most complained about).
On average one model year of the Tuscany has 1 complaints (12 years in the data). This year has 5, above average.
What to check before buying
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Wheels. Wheel runout, cracks, signs of a wheel strike.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- The fuel rail assembly may develop leaks, which may result in an undetected prolonged diesel fuel spray
A leak involving spraying/misting fuel in the presence of an ignition source may increase the risk of fire. This affects the following Thor Motor Coach products: model year 2018-2022 Tuscany and Venetian motorhomes.
- This letter stated that there was one (1) Service Notification issued for the month of October, 2017
Other years of this model
Questions and answers
What are the most common problems with the 2018 Thor Motor Coach Tuscany?
Owner complaints to NHTSA most often mention: structure, equipment, electrical system. Total complaints: 5.
How many service bulletins (TSB) were issued for the 2018 Thor Motor Coach Tuscany?
NHTSA lists 2 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2018 Thor Motor Coach Tuscany from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2018 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.