Service bulletins for the 2020 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.
234 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| BTI&08192021906 | 2021-08-25. 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. |
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| BPaS08192021902 | 2021-08-25. 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&08192021904 | 2021-08-25. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2020 RDXs with a client complaint of a noise coming from the front windows when opening or closing. 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. |
| B21-028 | 2021-08-13. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Service Bulletin - The MIL comes on with DTC P061B (PCM Internal Malfunction) is stored. |
| BTI&07302021904 | 2021-08-03. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2020 RDXs with a client complaint of a noise coming from the front windows when opening or closing. 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&07302021902 | 2021-08-03. 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. |
| BPaS07302021 | 2021-08-03. 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. |
| BPaS07232021 | 2021-07-27. Service bulletin. ELECTRICAL SYSTEM. Dealer Message - American Honda Motor Co., Inc. has agreed to a proposed class action settlement relating to Infotainment System components on the 2019 and 2020 RDX. AHM will provide additional details to its authorized Acura dealers if and when the Court grants final approval of the settlement. Should you have any questions in the interim, please visit www.infotainmentsettlement.com |
| BTI&07072021904 | 2021-07-20. 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. |
| BPaS07092021 | 2021-07-20. 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&06152021901 | 2021-06-22. 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. |
| BTI&06012021902 | 2021-06-11. Service bulletin. VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2020 RDXs with a client complaint of a noise coming from the front windows when opening or closing. 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. |
| B21-021 | 2021-06-11. Service bulletin. POWER TRAIN. Service Bulletin - The MIL comes on with DTC P0236 (Turbocharger Boost Sensor Circuit Range/Performance Problem) stored. |
| BTI&05282021901 | 2021-06-04. 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. |
| B20-053 | 2021-06-04. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Service Bulletin - The MIL is flashing with loss of power. |
| BPOC05102021 | 2021-05-25. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Dealer Message - On February 18, 2021, American Honda announced a warranty extension for certain 2019-2020 RDX vehicles. This warranty extension covers communication issues in the MOST bus network where the vehicle may experience popping or crackling from the speakers, a blank display, no sound from the audio system, a Network Loss message, center display staying on after turning the vehicle to the OFF mode with the door open, display switches between the Day Mode and Night Mode, the "Drive mode not available" message appears, or the disclaimer message is stuck on. |
| BPaS04292021 | 2021-05-05. 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. |
| ONLF9O04232021 | 2021-04-27. Service bulletin. ELECTRICAL SYSTEM. "Owner Notification Letter - Please be advised that there was a printing error in a letter you recently received regarding the above-mentioned warranty extension. Acura is adding an additional 2,000 miles to this extension. Please note that the warranty coverage for the MOST bus network on your vehicle is 6 years or 74,000 miles from the original date of purchase, whichever comes first. This notification replaces the previous letter you may have received. We apologize for any inconvenience this error may have caused you. What is the reason for this Warranty Extension? On some 2019 RDX models, a loose connection in the MOST bus network may cause the following: - A popping or crackling from the speakers, a blank display, or no sound from the audio system - Network Loss and/or Drive Mode Not Available Messages or the disclaimer message stuck on - The center display staying on after turning the vehicle to the OFF mode with the door open - Display switches between the Day Mode and Night Mode On some 2020 RDX models, a loose connection in the MOST bus network may cause the following: - A popping or crackling from the speakers, a blank display, or no sound from the audio system - A Network Loss message For vehicles that display any of the above respective symptoms, American Honda is extending the warranty for the MOST bus network on these vehicles to 6 years or 74,000 miles from the original date of purchase, whichever comes first." |
| ONLF9O04222021 | 2021-04-27. Service bulletin. ELECTRICAL SYSTEM. "Owner Notification Letter - On some 2019 RDX models, a loose connection in the MOST bus network may cause the following: - A popping or crackling from the speakers, a blank display, or no sound from the audio system - Network Loss and/or Drive Mode Not Available Messages or the disclaimer message stuck on - The center display staying on after turning the vehicle to the OFF mode with the door open - Display switches between the Day Mode and Night Mode On some 2020 RDX models, a loose connection in the MOST bus network may cause the following: - A popping or crackling from the speakers, a blank display, or no sound from the audio system - A Network Loss message For vehicles that display any of the above respective symptoms, American Honda is extending the warranty for the MOST bus network on these vehicles to 6 years or 74,000 miles from the original date of purchase, whichever comes first." |
| B20-053 | 2021-04-21. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin - The MIL is flashing with loss of power. |
| ONLF9O04052021 | 2021-04-15. Service bulletin. ELECTRICAL SYSTEM. "Owner Notification Letter - On some 2019 RDX models, a loose connection in the MOST bus network may cause the following: -A popping or crackling from the speakers, a blank display, or no sound from the audio system -Network Loss and/or Drive Mode Not Available Messages or the disclaimer message stuck on -The center display staying on after turning the vehicle to the OFF mode with the door open -Display switches between the Day Mode and Night Mode On some 2020 RDX models, a loose connection in the MOST bus network may cause the following: -A popping or crackling from the speakers, a blank display, or no sound from the audio system -A Network Loss message For vehicles that display any of the above respective symptoms, American Honda is extending the warranty for the MOST bus network on these vehicles to 6 years or 72,000 miles from the original date of purchase, whichever comes first." |
| B21-009 | 2021-04-15. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin - A loose connection in the MOST bus network is causing 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, Center Display Unit Stays On with Ignition Turned to OFF and Door Open, display switches between the Day Mode and Night Mode, the Drive mode not available message appears, or Disclaimer is stuck on. |
| BPaS03252021902 | 2021-04-06. Service bulletin. EQUIPMENT; VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2020 RDXs with a client complaint of a noise coming from the front windows when opening or closing. 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. |
| B20-032 | 2021-04-05. 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). |
| BPaS02262021902 | 2021-03-02. Service bulletin. VISIBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2019-2020 RDXs with a client complaint of a noise coming from the front windows when opening or closing. 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.