Service bulletin A20-049

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10199348
Published by NHTSA	2021-07-21
Manufacturer's number	A20-049
Manufacturer's date	2021-07-12
NHTSA component	EQUIPMENT

NHTSA's summary

Service Bulletin - There is a popping or crackling from the speakers or no sound from the audio system. You may also see a Network Loss message and/or display issues.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories

Vehicles listed
HONDA ODYSSEY	2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
25V877000	2025-12-17. EQUIPMENT ADAPTIVE/MOBILITY:WHEELCHAIR RESTRAINTS/SECUREMENT:LATCH/ANCHOR:

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
APOC05102023901	2023-05-23. Service bulletin. Dealer Message - American Honda is requesting a parts inspection for only 76253-THR-A12 - MIRROR SET, L. Check your current inventory and return any inventory of these parts to American Honda immediately that are missing the 2 silver tabs/clips. They tabs/clips may be loose in the package.
ATI&01212022901	2022-01-25. Service bulletin. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2022 Odysseys with a customer complaint of the power sliding door not closing, not opening or stopping/reversing during either 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.
ATI&01192022902	2022-01-25. Service bulletin. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2022 Odysseys & Ridgelines with a customer complaint of 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 vehicle before attempting a repair of any kind.
ATI&11162021902	2021-11-24. Service bulletin. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2022 Odysseys & Ridgelines with a customer complaint of 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 vehicle before attempting a repair of any kind.
AATS211101	2021-11-24. Service bulletin. Tech Line Summary Article - Customers are reporting the windows roll up partially but stop and roll back down when attempting to close the sliding door windows using the Auto-Up feature. An investigation of the complaint has identified a software compatibility issue between the window switch and window regulator. We are currently working on a fix, but there is currently no recommended repair. Until a repair is made available, advise the customer to close the window using manual operation by lightly pulling up on the switch until the desired position is reached. Also, they should avoid pulling up firmly on the switch to prevent activating automatic operation and the Auto-Up feature.
ATI&10202021903	2021-10-28. Service bulletin. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2022 Odysseys with a customer complaint of the auto-up feature failure of the rear sliding door window; the window goes up halfway and falsely reverse downward. 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.
AJA17881	2021-09-09. Service bulletin. Job Aid - This job aid contains information on the MOST Bus Network and troubleshooting information for common problems.
ATI&08092021908	2021-08-17. Service bulletin. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2022 Odysseys with a customer complaint of the power sliding door not closing, not opening or stopping/reversing during either 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.
A20-049	2021-02-26. Service bulletin. Service Bulletin - There is a popping or crackling from the speakers or no sound from the audio system. You may also see a Network Loss message and/or display issues.
A21010C	2021-01-30. Service bulletin. ServiceNews Article - We have received information from the vendor (Alpine) that display panels are being replaced for cracks on the center display screen. When they review these parts, they're finding that an aftermarket screen protector had been installed and that the screen protector is cracked. So, if you have a center display that appears to have a cracked screen, confirm that it does not have an aftermarket screen protector installed. If installed, remove it, and then check if the center display screen itself is cracked.