2018 Infiniti Q50 engine problems
17 owner complaints filed with NHTSA name the engine on the 2018 Infiniti Q50 — 40% of all complaints for this model year.
What owners report
“Filing this complaint regarding a safety-related defect involving the turbocharger system on my 2018 INFINITI Q50. The vehicle has approximately 46,000 miles and is 8 years old. INFINITI/Nissan has acknowledged through its own Technical Service Bulletins (TSBs) that turbocharger failure on…”
filed Jan 7, 2026
“The serpentine belt on my 2018 Infiniti Q50 Sport became contaminated with oil immediately after dealer turbo replacement at the end of August 2025, causing the belt to slip, shred, and be pulled into the engine. This resulted in sudden loss of essential engine functions and poses a significant…”
filed Nov 28, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
***** Retailer Announcement ***** INFINITI is committed to providing the highest levels of product quality and customer satisfaction. Therefore, INFINITI is conducting a warranty extension to Full Useful Life (FUL) of…
P4A05, P4A06 · Service Bulletin/Repair Instructions · issued Feb 4, 2025TURBOCHARGER REPLACEMENT PROCEDURE APPLIED ENGINES: VR30DDTT IF YOU CONFIRM One or both turbochargers require replacement. ACTION 1. Replace the affected turbocharger(s). Refer to the SERVICE PROCEDURE in this…
ITB22-038D · Service Bulletin/Repair Instructions · issued Feb 4, 2025
Engine problems in other Q50 years
| Year | Reports | Share |
|---|---|---|
| 2019 Q50 | 10 | 33% |
| 2017 Q50 | 17 | 27% |
| 2016 Q50 | 10 | 26% |
| 2015 Q50 | 9 | 7% |
| 2014 Q50 | 12 | 7% |
Other reported problem areas on the 2018 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.