There are 1 owner-reported speed control & cruise complaints for the 2018 Infiniti QX30in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact owns a 2018 Infiniti QX30. The contact stated while driving at various highway speeds, the vehicle suddenly decelerated to 30 MPH. During the failure the check engine warning light illuminated and the message "Inoperative - See Owner’s Manual" was displayed. The vehicle was taken to the local dealer on several occasions and the ignition module, engine cylinders, brake wiring harness and brake sensor were replaced; however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was 23,000.
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