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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
B20-0322021-09-02. Service bulletin. POWER TRAIN; VEHICLE SPEED CONTROL. Service Bulletin - The AWD indicator comes on with DTC C1843-62 (left rear differential fluid pressure deviation) and/or DTC C1844-62 (right rear differential fluid pressure deviation).
BTI&081920219062021-08-25. 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.
BPaS081920219022021-08-25. Service bulletin. VISIBILITY. 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&081920219022021-08-25. 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&073020219022021-08-03. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY. 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.
BPaS073020212021-08-03. 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&072820219012021-08-03. 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&070720219042021-07-20. 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 not close at all. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
BPaS070920212021-07-20. Service bulletin. VISIBILITY. 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&061520219012021-06-22. 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 not close at all. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
B20-0312021-06-22. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin - There is a popping or crackling from the speakers, a blank display, or no sound from the audio system. You may also see a Network Loss message.
BTI&060320212021-06-11. 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.
B21-0212021-06-11. Service bulletin. POWER TRAIN. Service Bulletin - The MIL comes on with DTC P0236 (Turbocharger Boost Sensor Circuit Range/Performance Problem) stored.
BTI&052820219012021-06-04. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY. 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 not close at all. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
B20-0532021-06-04. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Service Bulletin - The MIL is flashing with loss of power.
BPaS042920212021-05-05. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY. 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 not close at all. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
B20-0532021-04-21. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin - The MIL is flashing with loss of power.
B21010C2021-01-30. Service bulletin. ELECTRICAL SYSTEM. ServiceNews Article - It has been found that when replacing the PCM/ECM, the Dynamic Drive mode images - normally displayed on the center display - no longer appear. In order to prevent this, make sure that the software version on the infotainment control unit reads D.1.5.1 or higher. If the version is not up to date, you must complete the update by using the OTA function or via USB.
B20-0532021-01-05. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Service Bulletin - The MIL is flashing with loss of power. Humid air within the intake tract may condense and accumulate excessive moisture during steady driving.

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