Infiniti QX50 2019 — technical service bulletin
Bulletin ITB19-003 · NHTSA communication 10155154 · issued Feb 22, 2019
Technical service bulletin
communication type
Engine
component
2019
model years
1
vehicle entries
Official summary
2019 QX50; SPARK KNOCK IF YOU CONFIRM: A spark knock or knocking type noise coming from the engine under a low RPM/high load driving pattern (alternatively, ?at low speeds?) AND There are no DTCs stored in the ECM and/or TCM. ACTION 1. Reprogram the ECM, if applicable. 2. Inform the customer that premium gasoline is recommended.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.