2021 Acura RDX Technical Service Bulletins

194 technical service bulletins (TSBs) are on record for the 2021 Acura RDX. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11033180May 18, 2026Electrical 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
• 11024891Oct 17, 2025Body and structure. "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."
• 11023274Sep 17, 2025Engine. Service Bulletin - Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover.
• 11019258May 30, 2025Brakes. 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).
• 11019244May 16, 2025Brakes. 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).
• 11018501May 10, 2025Body and structure. 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.
• 11018015Apr 25, 2025Body and structure. 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.
• 11012814Dec 18, 2024Electrical 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.
• 11008048Sep 18, 2024Electrical 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.
• 11005523Jul 30, 2024Electrical 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.
• 11005521Jul 30, 2024Electrical 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.
• 11005193Jul 13, 2024Brakes. 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).
• 11000272May 11, 2024Brakes. 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.
• 10253294Apr 2, 2024Brakes. 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.
• 10252481Mar 27, 2024Transmission and drivetrain. Service Bulletin - During engine start in cold conditions, a miscalculation in the PCM causes the air-fuel ratio to exceed DTC rich criteria.
• 10251896Mar 12, 2024Engine cooling, Electrical system. 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.
• 10250736Feb 15, 2024Visibility (wipers, defrost, mirrors). 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.
• 10249207Jan 22, 2024Visibility (wipers, defrost, mirrors). 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.
• 10249203Jan 17, 2024Body and 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.
• 10248681Jan 2, 2024Visibility (wipers, defrost, mirrors). 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.
• 10246412Nov 27, 2023Exterior 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.
• 10246411Nov 27, 2023Visibility (wipers, defrost, mirrors). 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.
• 10245279Nov 8, 2023Visibility (wipers, defrost, mirrors). 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.
• 10244664Oct 30, 2023Exterior 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.
• 10244668Oct 24, 2023Visibility (wipers, defrost, mirrors). 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.
• 10244302Oct 16, 2023Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2021-2022 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.
• 10244192Oct 2, 2023Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2021-2022 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.
• 10242569Sep 14, 2023Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2021-2022 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.
• 10241882Aug 30, 2023Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2021-2022 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.
• 10240776Aug 11, 2023Body and structure. Service Bulletin - Pop noise from the rear roof area when turning into driveways, bumps, or on an incline due to panoramic roof frame mounting bolts unable to maintain the necessary clamp force. This can allow shifting, which may lead to a pop noise.
• 10239706Jul 17, 2023Visibility (wipers, defrost, mirrors), Body and structure, Electrical system. Service Bulletin - The client may notice a loss of auto function, or no function, of the sunroof glass/sunshade due to a Motor-Control Unit error code in the clock frequency check falsely detecting a failure.
• 10239510Jul 17, 2023Visibility (wipers, defrost, mirrors), Body and structure. Service Bulletin - The client notices loss of auto function, or no function, of the sunroof glass/sunshade due to a Motor-Control Unit error code in the clock frequency check falsely detecting a failure.
• 10238818Jun 27, 2023Electrical system, Equipment. Service Bulletin - There is a popping or crackling from the speakers, a blank display, or no sound from the audio system due to a loose connection in the MOST bus network.
• 10237173May 23, 2023Visibility (wipers, defrost, mirrors), Body and structure. Service Bulletin - A driver can notice loss of auto function, or no function, of the sunroof glass/sunshade due to Motor-Control Unit error code in the clock frequency check falsely detecting a failure.
• 10233673Mar 28, 2023Engine cooling, Fuel system. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 MDXs & RDXs with a client complaint of the Check Engine Light (CEL) on & the DTC P0087 (Fuel Rail Pressure Too Low [Loss of Fuel Pressure]) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start & stumble in conjunction with CEL.
• 10233209Mar 14, 2023Engine cooling. Service Bulletin - Under certain circumstances, the vehicle may experience driveability concerns. This may result in the following DTC’s to set: • P0300 (Random Misfire Detected), • P0301 (No. 1 Cylinder Misfire Detected), • P0302 (No. 2 Cylinder Misfire Detected), • P0303 (No. 3 Cylinder Misfire Detected), • P0304 (No. 4 Cylinder Misfire Detected), • P0172 (Fuel System Too Rich)
• 10232969Mar 13, 2023Engine cooling, Fuel system. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 MDXs & RDXs with a client complaint of the Check Engine Light (CEL) on & the DTC P0087 (Fuel Rail Pressure Too Low [Loss of Fuel Pressure]) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start & stumble in conjunction with CEL.
• 10232252Feb 23, 2023Engine cooling, Electrical system. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 MDXs & RDXs with a client complaint of the Check Engine Light (CEL) on & the DTC P0087 (Fuel Rail Pressure Too Low [Loss of Fuel Pressure]) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start & stumble in conjunction with CEL.
• 10231832Feb 7, 2023Fuel system, Engine cooling. Dealer Message- American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 MDXs & RDXs with a client complaint of the Check Engine Light (CEL) on & the DTC P0087 (Fuel Rail Pressure Too Low [Loss of Fuel Pressure]) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start & stumble in conjunction with CEL.
• 10230596Jan 18, 2023Electrical system, Fuel system. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 MDXs & RDXs with a client complaint of the Check Engine Light (CEL) on & the DTC P0087 (Fuel Rail Pressure Too Low [Loss of Fuel Pressure]) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start & stumble in conjunction with CEL.
• 10230595Jan 17, 2023Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2022 RDXs with a client complaint of a screeching or squeal noise from any window when it's going up or down. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
• 10229696Jan 3, 2023Fuel system, Electrical system. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 MDXs & RDXs with a client complaint of the Check Engine Light (CEL) on & the DTC P0087 (Fuel Rail Pressure Too Low [Loss of Fuel Pressure]) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start & stumble in conjunction with CEL.
• 10229694Jan 3, 2023Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2022 RDXs with a client complaint of a screeching or squeal noise from any window when it's going up or down. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
• 10228204Dec 13, 2022Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 - 2022 RDXs with a client complaint of a screeching or squeal noise from any window when its going up or down. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
• 10228203Dec 13, 2022Engine cooling. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2021 RDXs & TLX L4s with a client complaint of an oil leak or a dealer technician noticing an oil leak from the head cover gasket during a routine maintenance. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
• 10228201Dec 13, 2022Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2022 MDXs & 2020-2022 RDXs with a client complaint of the auto-open/close function on the sunshade/sunroof being lost (client has to continuously press on the button for movement). To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
• 10227239Nov 28, 2022Electrical system, Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2022 MDXs & 2020-2022 RDXs with a client complaint of the auto-open/close function on the sunshade/sunroof being lost (client has to continuously press on the button for movement). To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
• 10227237Nov 28, 2022Engine cooling. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2021 RDXs & TLX L4s with a client complaint of an oil leak or a dealer technician noticing an oil leak from the head cover gasket during a routine maintenance. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
• 10227236Nov 28, 2022Brakes. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2022 RDXs with a client complaint of a front and/or rear brake noise which 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.
• 10227235Nov 28, 2022Visibility (wipers, defrost, mirrors). Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 - 2022 RDXs with a client complaint of a screeching or squeal noise from any window when its going up or down. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.

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