2015 Infiniti Q50 vehicle speed control problems
21 owner complaints filed with NHTSA name the vehicle speed control on the 2015 Infiniti Q50 — 17% of all complaints for this model year.
What owners report
“While driving my 2015 Infiniti Q50s, the transmission suddenly suffered a catastrophic electronic failure, causing the vehicle to immediately drop into "limp mode." This resulted in a sudden and dangerous loss of acceleration while operating in traffic. A diagnostic scan revealed trouble codes…”
filed Jul 15, 2026
“The transmission speed sensor has failed needs a new valve body. It seems like a very common problem with this car and it’s a $3000 fix according to my mechanic. I think there needs to be a recall issued considering everybody on this website is reporting the same problems.”
filed Apr 15, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Vehicle Speed Control problems in other Q50 years
| Year | Reports | Share |
|---|---|---|
| 2019 Q50 | 4 | 13% |
| 2018 Q50 | 2 | 5% |
| 2017 Q50 | 2 | 3% |
| 2016 Q50 | 3 | 8% |
| 2014 Q50 | 11 | 7% |
Other reported problem areas on the 2015 Infiniti Q50
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.