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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
BTI&111620219012021-11-24. Service bulletin. LATCHES/LOCKS/LINKAGES; STRUCTURE:FRAME AND MEMBERS; EQUIPMENT. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 RDXs with a client complaint of the center console lid (armrest) not latching/staying closed intermittently or at all times. To better understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind.
BTI&110920212021-11-16. Service bulletin. SERVICE BRAKES, HYDRAULIC. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2022 RDXs with a client complaint of a brake noise. The noise can be described as a squeal. 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.
B21100A2021-11-16. Service bulletin. AIR BAGS; SEATS. ServiceNews Article - There are several possible causes for the SRS DTC U3000-49 (Internal Failure of the SRS Unit) to be stored. If you can duplicate the DTC, the troubleshooting will take you through the step-by-step process in isolating the faulty component. In most situations, the SRS Unit should be last on the list of components to replace. Here is a quick tip for troubleshooting a faulty seat weight sensor.
BTI&110320212021-11-09. Service bulletin. TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for 2019-2022 ILXs, 2022 MDXs, 2021-2022 RDXs & TLXs with a client complaint of the Tire Pressure Monitoring System (TPMS) light on due to a faulty sensor with a client complaint of the Tire Pressure Monitoring System (TPMS) light on due to a faulty sensor. To better understand the cause of this condition, AHM would like to collect specific parts from the before attempting a repair of any kind.
BTI&103020219012021-11-03. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 RDXs & 2022 MDXs with a client complaint of the sunshade or sunroof closing partially before reversing open or will not move in the closing direction from any position. 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&102920212021-11-03. Service bulletin. WHEELS. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for 2019-2022 ILXs, 2022 MDXs, 2021 RDXs and 2021-2022 TLXs with a client complaint of the Tire Pressure Monitoring System (TPMS) light on due to a faulty sensor. To better understand the cause of this condition, AHM would like to collect specific parts from the before attempting a repair of any kind.
BTI&102720219012021-11-03. Service bulletin. SUSPENSION. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 RDXs with a client complaint of front bearing noise coming from the front while driving. The noise can be described as howling or moaning. 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.
BTI&102520219012021-11-03. Service bulletin. SEATS. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 RDXs with a client complaint of the center console lid (armrest) not latching/staying closed intermittently or at all times. To better understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind.
B21-0282021-11-03. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Service Bulletin - The MIL comes on with DTC P061B (PCM Internal Malfunction) is stored.
BTI&102020219042021-10-28. Service bulletin. SERVICE BRAKES. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 RDXs with a client complaint of a brake noise. The noise can be described as a squeal. 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.
BTI&101220212021-10-19. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 RDXs & 2022 MDXs with a client complaint of the sunshade or sunroof closing partially before reversing open or will not move in the closing direction from any position. 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&100720212021-10-16. Service bulletin. TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS; TIRES. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for 2019-2022 ILXs, 2022 MDXs, 2021 RDXs and 2021-2022 TLXs with a client complaint of the Tire Pressure Monitoring System (TPMS) light on due to a faulty sensor. To better understand the cause of this condition, AHM would like to collect specific parts from the before attempting a repair of any kind.
BTI&100520219012021-10-16. Service bulletin. EQUIPMENT; STRUCTURE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 RDXs with a client complaint of the center console lid (armrest) not latching/staying closed intermittently or at all times. To better understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind.
BTI&100120219032021-10-16. Service bulletin. SERVICE BRAKES, HYDRAULIC. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 RDXs with a client complaint of a brake noise. The noise can be described as a squeal. 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.
BTI&100120219012021-10-16. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 RDXs with a client complaint of the sunshade or sunroof closing partially before reversing open or will not move in the closing direction from any position. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS100120212021-10-16. Service bulletin. EQUIPMENT. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2021 RDXs with a client complaint of a rattle noise coming from the Head-Up Display (HUD). 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&092020219022021-10-06. Service bulletin. WHEELS. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 RDXs with a client complaint of front bearing noise coming from the front while driving. The noise can be described as howling or moaning. 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.
BTI&091020219012021-09-16. Service bulletin. SEATS; SEATS:CRITICAL FASTENERS. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 RDXs with a client complaint of the center console lid (armrest) not latching/staying closed intermittently or at all times. To better understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind.
BTI&090720219042021-09-16. Service bulletin. SERVICE BRAKES. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 RDXs with a client complaint of a brake noise. The noise can be described as a squeal. 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.
BTI&090720219012021-09-16. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 RDXs with a client complaint of the sunshade or sunroof closing partially before reversing open or will not move in the closing direction from any position. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS090720219022021-09-16. Service bulletin. ELECTRICAL SYSTEM:ADAS:HUD:SOFTWARE; VISIBILITY; ELECTRICAL SYSTEM:ADAS:HUD:CAMERA/SENSOR; ELECTRICAL SYSTEM:ADAS:HUD:PROJECTOR. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2021 RDXs with a client complaint of a rattle noise coming from the Head-Up Display (HUD). To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BJA178822021-09-16. Service bulletin. ELECTRICAL SYSTEM. Job Aid - This job aid contains information on the MOST Bus Network and troubleshooting information for common problems.
BJA178822021-09-09. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Job Aid - This job aid contains information on the MOST Bus Network and troubleshooting information for common problems.
B21080A2021-09-02. Service bulletin. FORWARD COLLISION AVOIDANCE. ServiceNews Article - When returning the vehicle to the client, inform them that if the message Adaptive Cruise Control System Problem comes back on when the vehicle is driven in freezing conditions, it is likely because of snow or ice buildup on the radar. Advise the client of the following procedure to clean the front grille where the radar is located.
B21-0272021-09-02. Service bulletin. FORWARD COLLISION AVOIDANCE. Service Bulletin - The ACC system error message comes on while driving when outside temperatures are low/near freezing.

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