Service bulletins for the 2021 Infiniti Q50
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
111 on file from NHTSA, as of 2026-10-19.
About P0300 on the 2021 Infiniti Q50: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: P0300 are shown. Show all
| ITB21-009 | 2021-06-09. Service bulletin. ENGINE AND ENGINE COOLING. 2021 Q50/Q60; DTC P0607 STORED IN THE ECM IF YOU CONFIRM If CONSULT-III plus is available: DTC P0607 (ECM) is stored in the ECM. This DTC may be in Current or Past status. If CONSULT-III plus is not available: The vehicle displays an engine stall / no start condition with adequate fuel level, adequate battery voltage, and no fuel pump related DTCs present, Or DTC P0300 (Multiple Cylinder Misfire) is stored in the ECM and the vehicle displays misfire events on cylinder 3 and cylinder 6 only. ACTION 1. Replace the ECM. 2. Reprogram the ECM. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.