There are 1 owner-reported speed control & cruise complaints for the 2019 Infiniti QX80in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
THE CRUISE CONTROL DOES NOT WORK GOING DOWN A HILL. IT WORKS ON A LEVEL ROAD. IT WORKS GOING UP A HILL. I SET IT AT SAY 50 MPH ON US ROUTE 30, BOSWELL, PA GOING DOWN A HILL AND WITHOUT APPLYING THE BRAKES THE VEHICLE WOULD BE GOING 60 MPH AT THE BOTTOM OF THE HILL. THIS IS DANGEROUS. DEALER TOLD ME NOT TO USE THE CRUISE CONTROL GOING DOWN A HILL!
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