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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

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
BTI&061520219052021-06-22. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2020 MDX V6s (non-Hybrid) with a client complaint of the Malfunction Indicator Light (MIL) on with the misfire DTCs P0300-P0306 stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
BPaS052620219032021-06-04. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2020 MDX V6s (non-Hybrid) with a client complaint of the Malfunction Indicator Light (MIL) on with the misfire DTCs P0300-P0306 stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
BPaS042220219022021-04-27. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2018-2020 MDXs (non-Hybrid) & TLX V6s with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P0441 (EVAP System Purge Flow Malfunction) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
BPaS041620212021-04-21. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2020 MDX V6s (non-Hybrid) with a client complaint of the Malfunction Indicator Light (MIL) on with the misfire DTC P030X (Please provide the full DTC description) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
B20-0412020-11-11. Service bulletin. ENGINE AND ENGINE COOLING. Service Bulletin - A chirping in the cabin with the engine running, the transmission in Drive, and the engine at operating temperature.
BBOM091520202020-09-22. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Dealer Message - Today, September 15, 2020, Acura is announcing a stop sale and emissions recall for certain 2017-2020 MDX Sport Hybrid and 2014, 2016-2020 RLX Sport Hybrid vehicles that may not properly clear specific diagnostic trouble codes (DTC). Presence of these codes may prevent the vehicle from passing a smog test. Refer to your eResponsibility report or do an iN VIN status inquiry to determine which units in your inventory are affected.
B14-0252020-09-22. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS. Service Bulletin - The timing belt area chirps after the engine warms up.
B14-0252020-08-14. Service bulletin. ENGINE AND ENGINE COOLING. Service Bulletin - The timing belt area makes a chirping noise after the engine warms up.
BPaS102820199032019-11-05. Service bulletin. FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP; ENGINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018-2019 MDXs & TLXs with a client complaint of a chirp noise heard from inside the cabin or coming from the engine compartment. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS090920199032019-09-18. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018-2019 MDXs & TLXs with a client complaint of a chirp noise heard from inside the cabin or coming from the engine compartment. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS081420199042019-08-20. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018-2019 MDXs & TLXs with a client complaint of a chirp noise heard from inside the cabin or coming from the engine compartment. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS071920199012019-07-26. Service bulletin. ENGINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018-2019 MDXs & TLXs with a client complaint of a chirp noise heard from inside the cabin or coming from the engine compartment. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
B19-0052019-02-26. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; VISIBILITY. "Service Bulletin - The vehicle may exhibit several of the following symptoms: - Multiple indicators are on. - The option fuse E21 (7.5 A) is blown. - It is hard to shut off the engine. - No communication with the i-HDS."
BPaS081520189032018-09-17. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 MDXs a client complaint of the auto idle stop inoperative. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS072720189032018-08-20. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 MDXs a client complaint of the auto idle stop inoperative. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS070920189032018-08-06. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 MDXs a client complaint of the auto idle stop inoperative. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
B18070C2018-08-06. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Servicenews article - Until recently, Tech Line had only two categories for auto idle stop system issues. That made it hard for our engineering staff to understand what was specifically inhibiting the system. To help with this, Tech Line has added more categories to match what's listed in the service information. As a result, when calling them for an auto idle stop issue, you must now send a snapshot. Tech Line needs it for troubleshooting and won't be able to help unless you do.
BPaS070920189032018-07-30. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 MDXs a client complaint of the auto idle stop inoperative. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS053120189042018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 MDXs a client complaint of the auto idle stop inoperative. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS042420189012018-05-14. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 MDXs a client complaint of the auto idle stop inoperative. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
B16-0082018-05-14. Service bulletin. ENGINE; FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP. Service bulletin - The high pressure fuel pump area chirps after the engine is warm. The high pressure fuel pump is making a chirp noise. NOTE: This noise does not impact the pump, engine function, or reliability.
B16-0082017-12-05. Service bulletin. ENGINE. Service bulletin - There is a chirping coming from the engine area with the engine warmed up. The high pressure fuel pump is making a chirp.

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