2021 Honda Civic technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Sep 25, 2026 Service bulletinUnder certain conditions, the cylinder head gasket effectiveness may be reduced which may
• Aug 26, 2026 Service bulletinUnder certain conditions, the cylinder head gasket effectiveness may be reduced which may
• Aug 26, 2026 OtherDealer Message
• Jul 29, 2025 Service bulletinOil leak at timing chain tensioner inspection cover due to possible insufficient sealant adhesion on...
• Dec 3, 2024 OtherDealer Message
• Nov 5, 2024 OtherDealer Message
• Sep 12, 2024 OtherDealer Message
• Jun 19, 2024 Service bulletinDue to a new North America regulation which introduces a new refrigerant and oil requirement, the...
• Mar 21, 2024 Service bulletinDealer Message
• Oct 25, 2023 Service bulletinThe ACC system error message comes on while driving when outside temperatures are low/near freezing due to...
• Oct 17, 2023 Service bulletinService News
• Sep 28, 2023 Service bulletinDue to a new North America regulation which introduces a new refrigerant and oil requirement the...
• Jun 12, 2023 Service bulletinOwner Notification Letter
• May 19, 2023 Service bulletinDealer Message
• Apr 25, 2023 Service bulletinDealer Message
• Apr 5, 2023 Service bulletinCustomers have complained of the air conditioning system not blowing cold air due to the oil/refrigerant...
• Mar 28, 2023 Service bulletinDealer Message
• Jan 3, 2023 Service bulletinDealer Message
• Dec 13, 2022 Service bulletinDealer Message
• Dec 13, 2022 Service bulletinDealer Message
• Sep 5, 2022 Service bulletinCustomer complains that the manual transmission will not shift, the clutch is slipping, or the vehicle...
• Aug 22, 2022 Service bulletinDealer message
• Jul 27, 2022 Service bulletinDealer message
• Jul 26, 2022 Service bulletinDealer message
• May 1, 2022 Service bulletinThere is a rattling coming from the front of the vehicle
• Jan 29, 2022 Service bulletinServiceNews Article
• Oct 5, 2021 Service bulletinDealer Message
• Sep 7, 2021 Service bulletinDealer Message
• Aug 31, 2021 Service bulletinThe ACC system error message comes on while driving when outside temperatures are low/near freezing.
• Aug 31, 2021 Service bulletinServiceNews Article
• Aug 9, 2021 Service bulletinDealer Message
• Aug 3, 2021 Service bulletinTech Line Summary Article
• Jul 6, 2021 Service bulletinOwner Notification Letter
• Jun 24, 2021 Service bulletinServiceNews Article
• Jun 18, 2021 Service bulletinAmerican Honda is extending the warranty on the A/C condenser to 10 years from the original date of...
• Jun 3, 2021 Service bulletinThere is a rattling coming from the front of the vehicle.
• May 28, 2021 Service bulletinDealer Message
• Jan 19, 2016 Service bulletinSS 1023006Â Successful Regen Reference for EPA 07 MBE 900 Engines