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Service bulletins for the 2018 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.

159 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
ITB19-0242019-10-08. Service bulletin. SEATS; ELECTRICAL SYSTEM; AIR BAGS. DTC B00A0-00 STORED IF YOU CONFIRM DTC B00A0-00 (OCCUPANT DETECTION SENSOR UNIT) is stored And OCS zero point reset cannot be performed And The following screen will display: ACTION 1. Check the Occupant Classification System (OCS) control unit using the ODS Analysis tool software. • Refer to SERVICE PROCEDURE on the next page. HINT: “OCS” may also be referred to as “ODS”. 2. Perform “75-zero RESET”.
ITB18-040c2019-10-08. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. SOFTWARE UPDATES FOR INFOTAINMENT ISSUES This bulletin has been amended. See AMENDMENT HISTORY on the last page. Discard all previous versions of this bulletin.
ITB19-0182019-09-10. Service bulletin. ELECTRICAL SYSTEM. 2018 Q50; TPMS LIGHT ON WITH DTC STORED IF YOU CONFIRM The Tire Pressure Monitor System (TPMS) light is ON with one or more of the following DTCs stored: C1708 – [NO DATA] FL C1709 – [NO DATA] FR C1710 – [NO DATA] RR C1711 – [NO DATA] RL ACTION 1. Verify that the TPMS sensor associated with the stored DTC(s) is transmitting a signal with the Signal Tech II. 2. If transmitting, clear TPMS DTCs, turn the HVAC to maximum cool, and then road test the vehicle (see the specific conditions under steps 20 and 21 on page 6). 3. If a DTC is stored during the road test, replace the HVAC blower motor.
ITB19-002a2019-08-19. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. 2018-2019 INFINITI; DISPLAY CONTROL UNIT SERVICE INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB12-011n2019-07-22. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. TELEMATICS SERVICE INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB19-0132019-06-24. Service bulletin. LANE DEPARTURE: SENSING SYSTEM: CAMERA; EQUIPMENT:ELECTRICAL. AEB WARNING LIGHT BLINKING This bulletin applies only to vehicles equipped with a lane camera. SERVICE INFORMATION If the AEB warning light is blinking (but not illuminated steadily) or the customer states it is blinking, and there are no related DTCs, inspect the windshield. A blinking AEB warning light may occur under the following conditions: - When contamination or foreign material adhere to the lane camera viewing window on the windshield - When driving while it is snowing or when frost forms on the lane camera viewing window on the windshield - When the lane camera viewing window on the windshield is temporarily fogged up NOTE: - If DTCs are present in any of the following related systems: - Laser/Radar, - ICC/ADAS, or - Lane Camera, Refer to the related Electronic Service Manual (ESM) for diagnosis. - Refer to the following pages for further information.
ITB19-0082019-05-20. Service bulletin. EQUIPMENT. EXTERIOR CLEANING INFORMATION SERVICE INFORMATION When cleaning the exterior of an Infiniti vehicle, damage may occur when using a cleaner with too high of an alkaline concentration. - Always refer to the Appearance and care section of the related owner?s manual. - Not all cleaners are created equal. - Many cleaners come in concentrated form. - Alkaline cleaners (cleaners with a high pH value) can cause spots on paint and trim when not used as directed. - Some commercial car washes use cleaners with a high pH value. - When using cleaners that meet the conditions defined in the Appearance and care section, be sure to carefully follow the cleaner?s directions. - When finished cleaning/washing, rinse thoroughly with clean water. IMPORTANT: Damage to paint, glass, bright metal, or any other exterior surface caused by using improper cleaning products is not covered under warranty. Always refer to the Paint Incident Identification Manual (PIIM) and Assurance Products Reference Manual (APRM). Follow the guidelines in the PIIM and APRM for non-warrantable exterior body, glass, or painted surface quality issues. To access the PIIM and APRM, login to nnanet.com: - For the PIIM, select: MY LINKS > Warranty > Paint Incident Identification Manual - For the APRM, select: MY DOCUMENTS > Warranty > APRM See further information in this bulletin.
ITB19-0072019-04-15. Service bulletin. EQUIPMENT; FUEL SYSTEM, OTHER. INFINITI; P0171 AND P0174 SERVICE INFORMATION SERVICE INFORMATION Diagnosis for DTCs P0171 (FUEL SYS LEAN B1) and P0174 (FUEL SYS LEAN B2) have been revised for the APPLIED VEHICLES listed above. When performing diagnosis for either of these DTCs, start by using the SERVICE PROCEDURE section of this bulletin. NOTE: The related Electronic Service Manuals (ESM) will be revised in the future to include these diagnostic steps.
ITB19-0062019-04-15. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. INFINITI; MIL ON WITH DTC P219A AND/OR P219B STORED SERVICE INFORMATION If the MIL is ON and DTC P219A (AIR FUEL RATIO IMBALANCE B1) and/or P219B (AIR FUEL RATIO IMBALANCE B2) is stored: - DO NOT replace the Air Fuel Ratio (A/F) sensor. - Refer to the applicable Electronic Service Manual (ESM) and follow the diagnostic procedure for DTC P219A and/or P219B.
ITB18-040b2019-04-15. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. SOFTWARE UPDATES FOR INFOTAINMENT ISSUES This bulletin has been amended. Please see Amendment History on the last page. Please discard previous versions of this bulletin.
ITB19-0052019-03-25. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. CLOCK, AUDIO, HVAC OR NAVIGATION SETTINGS INTERMITTENTLY CHANGE ON THEIR OWN This bulletin applies only to vehicles equipped with INFINITI InTouch (Intelligent Key). SERVICE INFORMATION An Intelligent Key, for the applied vehicles with INFINITI InTouch?, has the abillity to trigger specific customized settings for the radio, clock, heating and air conditioning (HVAC) and navigation that are unique to that key, and each Intelligent Key for a specific vehicle may have different settings stored. EXAMPLE: The vehicle may be driven by more than one person, and each driver has a personal Intelligent Key. Each driver may adjust their preferred vehicle settings differently. If two or more Intelligent Keys with different stored settings are unintentionally interchanged, one or more of the following perceived issues might be reported by the customer(s). - Radio ? Presets are lost or change - Clock ? Settings are not showing the correct time due to day-light savings or the selected region (time zone) - HVAC ? Controls are set differently - Navigation ? Settings suddenly altered If any of these perceived issues are present: - Confirm if there are multiple Intelligent Keys being used by the customer(s) interchangeably, and if so, verify that each key?s settings are different. NOTE: Customer may not recognize that different Intelligent Keys are linked differently.
ITB17-017a2019-03-25. Service bulletin. ELECTRICAL SYSTEM. MIL ON WITH DTC P0101, P010B, AND/OR P0106 This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB16-012b2019-03-25. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL. INTELLIGENT KEY BUTTONS INOPERATIVE BUT REQUEST SWITCHES WORK This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB18-040a2019-02-25. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. INFINITI; SOFTWARE UPDATES FOR INFOTAINMENT ISSUES This bulletin has been amended. Please see Amendment History on the last page. Please discard previous versions of this bulletin.
ITB18-0402019-02-25. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. INFINITI; SOFTWARE UPDATES FOR INFOTAINMENT ISSUES IF YOU CONFIRM Any one or a combination of the following on an applied vehicle: - Reverse camera is blank (vehicles manufactured before May 1, 2018) - Reverse camera remains ON when in Drive (vehicles manufactured before May 1, 2018) - Average fuel economy displays 99.9 MPG - Display screen flickers at higher ambient interior temperatures - SXM Info Apps (Weather, Stocks, Fuel Prices) inoperative ACTION 1. Refer to page 4, step 8 in the SERVICE PROCEDURE to confirm an update applies to the Display Control Unit (DCU) of the vehicle being worked on. - Confirmation is determined by comparing the DCU part number with those listed in Table on page 5. 2. If this bulletin applies, update the DCU software. - See REQUIRED SPECIAL TOOL on page 2. NOTE: The updated software resolves the items above along with improving software stability.
ITB19-0022019-02-19. Service bulletin. EQUIPMENT:ELECTRICAL. 2018-2019 INFINITI VEHICLES; DISPLAY CONTROL UNIT SERVICE INFORMATION SERVICE INFORMATION If the Display Control Unit (DCU) needs to be replaced on an APPLIED VEHICLE for any reason, follow the steps in the Service Procedure to: - Confirm proper diagnosis and repair with TECH LINE to obtain DCU order approval, then place the order with DENSO. NOTE: The DCU order approval process does not apply to 2017 model year and earlier models. TECH LINE authorization is not needed for 2017 model year and earlier models. - Configure the Multi AV system. - 2018-2019 QX30 vehicles only: Register the replacement DCU. DCU registration is necessary whether or not the vehicle has an active Infiniti InTouch Apps subscription. NOTE: The original DCU must be installed in the vehicle while performing part of this procedure. DO NOT remove the original DCU until instructed.
ITB19-0012019-02-19. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. CHASSIS CONTROL MODULE DTC INFORMATION SERVICE INFORMATION If one or more of the following Chassis Control DTCs are stored: - C1BA0-00 - (CHASSIS CONTROL BRAKE SYSTEM) - C1B90-00 - (DIRECT ADAPTIVE STEERING SYSTEM) - C1B92-00 - (BRAKE CONTROL SYSTEM) - C1B93-00 - (ENGINE/HEV SYSTEM) - C1B94-00 - (TRANSMISSION SYSTEM) And One or more additional DTCs, other than those above, are also stored in a control unit other than the Chassis Control Module. - Perform the diagnostic/repair procedures for the additional DTCs of the other control unit FIRST. - Refer to the Electronic Service Manual (ESM) for DTC specific diagnostic information. Do not replace the CHASSIS CONTROL MODULE (CONTROLLER ASSY-IDM) if additional DTCs are present.
ITB17-042b2019-02-19. Service bulletin. ENGINE AND ENGINE COOLING. INFINITI; DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See Amendment History on the last page. Please discard previous versions of this bulletin.
ITB13-044g2019-02-19. Service bulletin. ENGINE AND ENGINE COOLING. ALL MODEL YEAR 2012 AND NEWER INFINITI VEHICLES; EVAP LEAK DTC P0442, P0455, P0456 INFORMATION This bulletin has been amended. See Amendment History on the last page. Please discard previous versions of this bulletin.
ITB12-011m2019-02-19. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TELEMATICS SERVICE INFORMATION This bulletin applies only to vehicles equipped with factory Navigation system. This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB18-0392019-01-07. Service bulletin. AIR BAGS. AIR BAG WARNING LIGHT FLASHING INDICATING SYSTEM DIAGNOSTIC MODE IF YOU CONFIRM The air bag warning light is flashing slowly (repeating 2 seconds ON, 2 seconds OFF). NOTE: If this should occur, the Air Bag Diagnosis Sensor Unit is in Diagnostic Mode and needs to be returned to User Mode. ACTION 1. Use CONSULT-III plus to check for Air Bag DTCs and perform repairs as needed. 2. Return the Air Bag Diagnosis Sensor Unit to User Mode.
ITB18-0372018-12-03. Service bulletin. STRUCTURE; EQUIPMENT. PLASTIC INTERIOR TRIM PROTECTIVE COVERING REMOVAL SERVICE INFORMATION Vehicles are delivered with plastic interior trim protective covering on the front and rear seats, front and rear door panel finishers, steering wheel, and sun visors (see examples on page 2). When removing the protective covering, care must be used to avoid scuffs, scrapes, cuts, and other abrasive contact to interior trim components. DO NOT use sharp objects like razor blades, box cutters, knives, etc. when removing the plastic interior trim protective covering. IMPORTANT: All soft trim described in this bulletin is on automatic return to NNA. Any trim found damaged in the way described in this bulletin will be charged back to the dealer.
ITB18-0342018-12-03. Service bulletin. POWER TRAIN. TRANSMISSION & ENGINE AUTOMATED DATA COLLECTION AND DIAGNOSTIC REPORTING SERVICE INFORMATION To support proper diagnosis and to promote Fixed-Right-First-Time ? Infiniti may review CONSULT-III plus (CIII plus) data relating to vehicle operation and function to help with vehicle diagnosis and diagnostic validation. IMPORTANT: For transmission/engine repair or replacement, retailers are required to connect C-III plus and perform ?Diagnosis (All Systems)?. Performing C-III plus ?Diagnosis (All Systems)? is also required prior to contacting any Infiniti call center (i.e. TECH-LINE, PCC, or WCC) for diagnostic support or claim preauthorization. NOTE: For additional information regarding Automated Vehicle Data Collection, refer to IWBI/18-019. To support Automated Vehicle Data Collection, your C-III plus must have the Diagnosis result reporting function-Setting turned ON. If Diagnosis result reporting function-Setting is OFF: - It may cause dealer consideration for Audit or the Anomalous Repair Control (ARC) program, where applicable. - It may result in a repair being non-warrantable. Refer to the Service Procedure on the next page to confirm your C-III plus ?Diagnosis result reporting function-Setting? is turned ON.
ITB15-026b2018-12-03. Service bulletin. ELECTRICAL SYSTEM. INFINITI; SIGNAL TECH-II INTELLIGENT KEY BATTERY TEST AND SIGNAL CHECK This bulletin has been amended. See Amendment History on the last page. Please discard previous versions of this bulletin.
Infiniti USA Tak2018-12-03. Service bulletin. AIR BAGS. Infiniti USA Electronic Field Communication Subject: Takata Completion Objectives for Q3 INFINITI is continuing to ask its retailers to urgently help increase customer participation in the Takata recalls to help it achieve 100% customer recall participation for the following vehicles: ? 2001 I30 ? 2002-04 I35 ? 2003-08 FX ? 2002-03 QX4 ? 2006-10 M Sedan INFINITI expects to upload the next refreshed owner list to DBS within the next week. We will also be reassigning VINs to retailers based on information changes. We didn?t reassign any VINs in Q2 to avoid any mid-quarter objective impact. If VINs were repaired out of network, the retailer/region with the original assignment received credit for the repair. This is an extremely serious safety issue and INFINITI is taking significant and unprecedented steps to increase client recall participation but it needs retailer help to achieve its remedy goals. A separate communication will be released later this month informing regional personnel of the requirements for bonus payout in Q3 and Q2 results. The Q3 objective is based on the average number of repairs in Q2 multiplied by the number of service days in Q3 (Mon-Sat minus any holidays). Retailer engagement is critical with this effort. It is a company-wide responsibility to make it a priority to replace these dangerous airbag inflators in affected vehicles. Further, increasing recall participation represents significant gross profit opportunity for our retailers.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.