Service bulletins for the 2018 Acura MDX
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.
145 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| ONL6AX01302026 | 2026-02-06. Other. FUEL/PROPULSION SYSTEM. Owner Notification Letter - Under certain circumstances, after coming to a stop and the idle stop feature engaging, the vehicle may not automatically restart. Acura is providing a product update with a new PGM-FI software update to fix this issue. |
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| B25-003 | 2025-09-16. Service bulletin. VISIBILITY/WIPER. Service Bulletin - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work. |
| B25-003 | 2025-07-23. Service bulletin. VISIBILITY/WIPER. Service Bulletin - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work. |
| B23-002 | 2025-07-09. Service bulletin. ENGINE. Service Bulletin - Under certain circumstances, after coming to a stop and engaging idle stop the vehicle may not restart automatically due to excessive cylinder pressure and/or low cranking torque. Typically, the client can immediately restart the vehicle by selecting Park and pressing the ENGINE START/STOP button. |
| ONL6L806042025 Form | 2025-07-01. Other. EXTERIOR LIGHTING. Owner Notification Letter - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work. |
| ONL6L806042025 Letter | 2025-07-01. Other. EXTERIOR LIGHTING. Owner Notification Letter - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work. |
| B25-003 | 2025-04-29. Service bulletin. VISIBILITY/WIPER. Service Bulletin - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work. |
| B24-022 | 2025-03-05. Service bulletin. ENGINE. Service Bulletin - The AWD warning light is on with one or more AWD DTCs having been set due to water intrusion into the electric oil pump motor connector area corrodes the terminals. |
| B24-022 | 2024-12-03. Service bulletin. STRUCTURE:BODY. Service Bulletin - The AWD warning light is on potentially due to water intrusion into the rear differential pump motor connector area that corrodes the terminals. |
| ONL6AX05292024 | 2024-06-03. Other. ENGINE. Owner Notification Letter - Under certain circumstances, after coming to a stop and the idle stop feature engaging, the vehicle may not automatically restart. Acura is providing a product update with a new PGM-FI software update to fix this issue. |
| B23-035 | 2024-01-17. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Service Bulletin - The MIL comes on during vehicle operation due to variations in the purge control solenoid valve spring, the valve wears unevenly and intermittently sticks. This may result in setting DTC P0441 (Evaporative Emission (EVAP) System Purge Flow Malfunction). |
| B23-035 | 2023-12-23. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Service Bulletin - Due to variations in the purge control solenoid valve spring, the valve wears unevenly and intermittently sticks. This may result in setting DTC P0441 (Evaporative Emission (EVAP) System Purge Flow Malfunction). |
| B23-009 | 2023-04-27. Service bulletin. ENGINE AND ENGINE COOLING. Service Bulletin - The engine will not crank on the initial startup attempt after the vehicle has been exposed to precipitation and then freezing temperatures. Water can enter the starter motor. In cold temperatures the water can freeze, preventing the starter motor from cranking the engine. |
| B23-002 | 2023-03-29. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin - Under certain circumstances, after coming to a stop and engaging idle stop the vehicle may not restart automatically due to excessive cylinder pressure and/or low cranking torque. Typically, the client can immediately restart the vehicle by selecting Park and pressing the ENGINE START/STOP button. Acura is extending the warranty coverage for valve adjustment and starter replacement related to this condition to 10 years from the original date of purchase with no mileage limitation. |
| ONL6AX03102023 | 2023-03-18. Service bulletin. ENGINE AND ENGINE COOLING. Product Update - Under certain circumstances, after coming to a stop and the idle stop feature engaging, the vehicle may not automatically restart. Acura is providing a product update with a new PGM-FI software update to fix this issue. |
| ONL6T603102023-3 | 2023-03-18. Service bulletin. ENGINE AND ENGINE COOLING. Warranty Extension - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. |
| ONL6T603102023 | 2023-03-18. Service bulletin. ENGINE AND ENGINE COOLING. Warranty Extension - Warranty Extension reimbursement form for engine idle stop repairs made before the warranty extension notice date. |
| B23-009 | 2023-03-18. Service bulletin. ENGINE AND ENGINE COOLING. Service Bulletin - The engine will not crank on the initial startup attempt after the vehicle has been exposed to precipitation and then freezing temperatures. |
| B19-019 | 2023-03-18. Service bulletin. EXTERIOR LIGHTING. Service Bulletin - Recall update for 2014 - 2019 MDX and 2017 - 2019 MDX Hybrid Sport models. An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or all of the taillights not to work. Honda updated the inspection procedure to replace both inner taillights if one or both inner taillights do not come on. |
| B23-008 | 2023-03-02. Service bulletin. FORWARD COLLISION AVOIDANCE; VEHICLE SPEED CONTROL; LANE DEPARTURE. Service Bulletin - Due to a problem with the detection logic in the multipurpose camera software, the vehicle's LKAS, ACC, or CMBS indicator lights may come on incorrectly. |
| B23-001 | 2023-02-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the customer can immediately restart the vehicle by selecting Park and pushing the ENGINE START/STOP button. |
| BBOM01062023 | 2023-01-11. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. Dealer Message - During development, the idle stop enable criteria was mis-set allowing idle stop to improperly engage while battery health is low. Under certain circumstances, after coming to a stop and engaging idle stop, the vehicle may not automatically restart. In most cases, the client can immediately restart the vehicle by selecting Park and pushing the Start button. |
| B23-002 | 2023-01-11. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE. Service Bulletin - Under certain circumstances, after coming to a stop and engaging idle stop the vehicle may not restart automatically due to excessive cylinder pressure and/or low cranking torque. Typically, the client can immediately restart the vehicle by selecting Park and pressing the ENGINE START/STOP button. NOTE: If 23-001 Product Update: PGM-FI Idle Stop Software Update is applicable to the VIN, the PGM-FI software must be updated first before the warranty extension applies. Acura is extending the warranty coverage for valve adjustment and starter replacement related to this condition to 10 years from the original date of purchase with no mileage limitation. |
| B23-001 | 2023-01-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the customer can immediately restart the vehicle by selecting Park and pushing the ENGINE START/STOP button. |
| ONLJ8F20220830 | 2022-09-09. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING. Owner notification - Our records indicate that a Emissions Recall has not been completed on this vehicle. When the powertrain control module (PCM) detects a malfunction in one of the odd number transmission gears, it will set one of four diagnostic trouble codes (DTCs). Due to inappropriate calibration of the PCM, the On Board Diagnostic (OBD) system cannot properly clear the transmission permanent DTC as required. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.