Service bulletins for the 2021 Honda Civic
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.
79 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Driver assistance are shown. Show all
| A21080A | 2023-10-25. Service bulletin. VEHICLE SPEED CONTROL; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Service News - If an Adaptive Cruise Control System Problem comes back on when the vehicle is driven in freezing conditions, inform the customer it is likely due to snow or ice buildup on the radar. Advise the customer of the following procedure to clean the front grille where the radar is located. |
|---|---|
| A21080A | 2021-09-02. 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." |
| A21-068 | 2021-09-02. Service bulletin. FORWARD COLLISION AVOIDANCE; ELECTRICAL SYSTEM. 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.