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Service bulletins for the 2021 Acura RDX

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.

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

By type

By component

By trouble code

Bulletins, newest first
B216732026-06-02. Over-the-air update. ELECTRICAL SYSTEM. Over The Air Update - Vehicles equipped with the System Updates application are capable of downloading and installing Over the Air System Updates. System Updates contain upgrades that fix a variety of operational errors and/or enhancements that add new functionality. Information for the various software releases can be found in this document. Software version: D.1.6.4
B23-0042025-11-04. Service bulletin. STRUCTURE:BODY. "Service Bulletin - A pop noise can occur from the rear roof area when turning into driveways, bumps, or on an incline due to, in some cases, the panoramic roof frame mounting bolts are unable to maintain the necessary clamp force. This can allow shifting, which may lead to a pop noise."
B25-0492025-09-23. Service bulletin. ENGINE. Service Bulletin - Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover.
B19-0532025-06-05. Service bulletin. SERVICE BRAKES. Service Bulletin - The front and/or rear brakes make a high-pitched squeal when the brakes are lightly applied at 24 km/h (15 mph) or less, with ambient temperatures below 10°C (50°F).
B19-0532025-06-05. Service bulletin. SERVICE BRAKES. Service Bulletin - The front and/or rear brakes make a high-pitched squeal when the brakes are lightly applied at 24 km/h (15 mph) or less, with ambient temperatures below 10°C (50°F).
BTI&050920259012025-05-20. Other. STRUCTURE:BODY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2025 RDXs and 2022-2025 MDXs with a client complaint of a pop noise in the rear sunroof area. Clients may describe a single pop noise heard while driving over a bump or turning in and out of driveways. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BTI&042520259012025-05-06. Other. STRUCTURE:BODY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2025 RDXs and 2022-2025 MDXs with a client complaint of a pop noise in the rear sunroof area. Clients may describe a single pop noise heard while driving over a bump or turning in and out of driveways. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
B23-0252025-01-13. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin - A coaxial cable terminal was not manufactured to proper specifications. An improperly manufactured terminal may lead to poor communication in the media-oriented system (MOST) bus network which can potentially affect the audio sound quality.
ONL6M3091720242024-09-26. Other. ELECTRICAL SYSTEM. Owner Notification Letter - A coaxial cable terminal was not manufactured to proper specifications. An improperly manufactured terminal may lead to poor communication in the media-oriented system (MOST) bus network which can potentially affect the audio sound quality.
B24-0452024-08-02. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin - A coaxial cable terminal was not manufactured to proper specifications. An improperly manufactured terminal may lead to poor communication in the media-oriented system transport (MOST) bus network which can potentially affect the audio sound quality.
BBOM073020249022024-08-02. Other. ELECTRICAL SYSTEM. Dealer Message - A coaxial cable terminal was not manufactured to proper specifications. An improperly manufactured terminal may lead to poor communication in the Media Oriented System Transport (MOST) bus network which can potentially affect the audio sound quality.
B19-0532024-07-24. Service bulletin. SERVICE BRAKES. Service Bulletin - The front and/or rear brakes make a high-pitched squeal when the brakes are lightly applied at 24 km/h (15 mph) or less, with ambient temperatures below 10°C (50°F).
B19-0532024-05-22. Service bulletin. SERVICE BRAKES. Service Bulletin - The front and/or rear brakes make a high-pitched squeal when the brakes are lightly applied at 15 mph or less, with ambient temperatures below 50° F.
B19-0532024-04-17. Service bulletin. SERVICE BRAKES. Service Bulletin- The front and/or rear brakes make a high-pitched squeal when lightly applied at 15 mph or less. The front brakes stop squealing when they are warmed up.For the front brakes, the brake damping force of applied shims is insufficient at colder temperature. For the rear brakes, there is not enough dampening between the rear brake pads and shims.
B23-0102024-04-03. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Service Bulletin - During engine start in cold conditions, a miscalculation in the PCM causes the air-fuel ratio to exceed DTC rich criteria.
B20-0532024-03-19. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin - The MIL is flashing with a loss of power. This is most common in hot, humid regions, or after a period of rainfall. Humid air within the intake passage may condense and accumulate moisture during steady driving which enters the engine and may cause a misfire and a flashing MIL.
BTI&021520249012024-02-27. Service bulletin. VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2019-2024 RDXs with a client complaint of the front wipers inop. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BTI&012220249022024-01-26. Service bulletin. VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2019-2024 RDXs with a client complaint of the front wipers inop. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
B23-0042024-01-26. Service bulletin. STRUCTURE. Service Bulletin - A pop noise from the rear roof area occurs when turning into driveways, bumps, or on an incline. It was determined that, in some cases, the panoramic roof frame mounting bolts are unable to maintain the necessary clamp force. This can allow shifting, which may lead to a pop noise.
BTI&010220249022024-01-09. Service bulletin. VISIBILITY/WIPER; VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2019-2024 RDXs with a client complaint of the front wipers inop. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BTI&112720239052023-12-08. Service bulletin. EXTERIOR LIGHTING. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2021 RDXs with a client complaint of moisture/condensation in the headlights. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BTI&112720239042023-12-08. Service bulletin. VISIBILITY; VISIBILITY/WIPER. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2019-2023 RDXs with a client complaint of the front wipers inop. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BTI&110820239022023-11-16. Service bulletin. VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2019-2023 RDXs with a client complaint of the front wipers inop. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BTI&102420239032023-11-01. Service bulletin. VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2019-2023 RDXs with a client complaint of the front wipers inop. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BTI&103020239012023-11-01. Service bulletin. EXTERIOR LIGHTING. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2021 RDXs with a client complaint of moisture/condensation in the headlights. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.

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