There are 2 owner-reported fuel system complaints for the 2018 Infiniti Q50in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
POOR GAS MILEAGE RANGE PER FULL TANK IS 289MILES VERY BAD MILEAGE *TR
GAS MILEAGE IS VERRY BAD ! IN CITY ONLY MY CAR GIVE ME 14 MPG AND HWY 18MPG INFINITI SAY IS. 20MPG CITY AND 29HWY. AND COMBINED 22MPG
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026