There are 1 owner-reported powertrain & transmission complaints for the 2017 Infiniti QX80in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
This is a very common and well-known issue with 2017 Infiniti QX 80 Vin number [XXX] The car RPMs flutter between 1000 RPMs to 2500 RPMs due to the TCM and EC M/ECU TCU failure to the transmission causing terrible gas mileage vehicle stalls in traffic which can cause accidents and has happened over 10 times to me I have called and reported this as well with you all Infiniti will not earn up to the fact that there is a fault and needs to replace the TCU/ECU/ECM/TCM in order to fix the issue I have an extended warranty and I’ve had to pay infinity dealership over $800 now for three different times for them to reflash these modules which does not correct the problem for longer than a week going back to the same issue it’s been an ongoing problem since we have them in the vehicle and I believe if this is investigated you will find that this is a common issue with almost every Infiniti QX 80 2017 and also some more year makes and models please investigate so consumers can be helped with this issue it’s also a safety concern as yes the vehicle needs acceleration in order to avoid a collision is not possible due to lack of power because the TCM and ECM is not communicating in order to downshift to give the power to the vehicle to get out of the way of a collision I have almost gotten into a wreck several times in stop and go traffic between the Rpm’s listed which are between 1020 500 RPMs as well as gas mileage has cut in half due to this issue and sometimes shifting we get stuck in one year or the other which normally is a higher gear therefore has no power to go we need it sometimes I have to turn the car off at stop signs or stop light in order to restore it so I did not cause a rear end collision by somebody running into me NHTSA serviced bulletin- consumers have to pay for Ben though know issue infiniti won’t take responsibility Reference: Date: AT17-002a ITB17-008a April 18, 2017 2017 QX80SHIFT SHOCK, LACK OF POWER, AND/OR RPM FLUCTUATES INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
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