Honda Accord 2017–2018 — technical service bulletin
Bulletin ATS180603 · NHTSA communication 10141181 · issued Jun 2, 2018
Technical service bulletin
communication type
Fuel System, Gasoline
component
2017–2018
model years
5
vehicle entries
Official summary
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.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.