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Service bulletins for the 2018 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.

236 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
APaS111320189012018-11-30. Service bulletin. ENGINE. Dealer message - American Honda (AHM) is investigating certain 2018 Accords & Civic Type-Rs with customer complaint of oil leak from the timing chain case cover. To fully 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.
APaS102620189012018-11-13. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda (AHM) is investigating certain 2018 Accords & Civic Type-Rs with customer complaint of oil leak from the timing chain case cover. To fully 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.
APaS070920189042018-08-06. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2016-2018 Civics with a customer complaint of excessive vibration and/or noise due to a broken side engine mount. The vibration can be felt through the steering wheel or floor at idle. The noise can be described as clunking or banging. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
APaS070920189042018-07-30. Service bulletin. ENGINE AND ENGINE COOLING; STEERING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2016-2018 Civics with a customer complaint of excessive vibration and/or noise due to a broken side engine mount. The vibration can be felt through the steering wheel or floor at idle. The noise can be described as clunking or banging. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
ATS1806032018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); FUEL SYSTEM, GASOLINE. Tech line summary article - Have a vehicle in your shop with low mileage (less than 1,500 miles) and a hard-to-pinpoint engine knock? We're currently investigating vehicles for hairline fractures in the crankshaft sprocket, and we suspect it may be the cause for this noise. In some cases you may be able to see these fractures by just removing the crankshaft pulley; however, they can be very small and you may need to remove the cam chain to ensure a thorough inspection.
APaS053120189032018-06-11. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2016-2018 Civics with a customer complaint of excessive vibration and/or noise due to a broken side engine mount. The vibration can be felt through the steering wheel or floor at idle. The noise can be described as clunking or banging. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
APaS040620189032018-04-23. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2017-2018 Civic Hatchbacks with a customer complaint of the windshield washer tank leaking. To fully 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.
APaS100420179012017-10-12. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2016-2018 Civics & 2017-2018 CR-Vs with a customer complaint of an oil leak. To fully understand the cause of this condition, AHM would like to inspect 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.