2018 Cadillac XT5 engine problems
15 owner complaints filed with NHTSA name the engine on the 2018 Cadillac XT5 — 23% of all complaints for this model year.
What owners report
“Check engine light sensor came on in mid-May which is the result of a faulty thermostat, also triggering a "Steering Assist is Reduced" message on the dashboard which I consider to be a safety issue. This is a known and common problem for this make, year and model and the cost to fix the problem is…”
filed May 26, 2026
“While driving at highway speeds, I needed to accelerate hard in order to pass another vehicle and while accelerating there was a downshift and increase in RPM. After passing, the RPM remained high even after I took foot off accelerator and it seemed the transmission did not shift back out of lower…”
filed Mar 28, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other XT5 years
| Year | Reports | Share |
|---|---|---|
| 2020 XT5 | 4 | 18% |
| 2019 XT5 | 6 | 19% |
| 2017 XT5 | 23 | 19% |
Other reported problem areas on the 2018 Cadillac XT5
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.