2018 Honda Accord engine problems
521 owner complaints filed with NHTSA name the engine on the 2018 Honda Accord — 29% of all complaints for this model year.
What owners report
“Major safety issue will lead to loss power and visual hazard for cars on road. 2018 accord 1.5 has a coolant leak in cylinder 2 and three via scope verified , shop said it needs a headgasket. It had misfire codes on scanner and shakes when start up. This will be potentially big issue if motor blows…”
filed Aug 5, 2026
“My vehicle started stalling and shaking right before all of the warning lights on my dashboard came on and the safety features stopped working (brake assist, brake hold etc). After checking, the spark plugs were all burnt out so I changed it along with the coil pack and this remedied the issue…”
filed Aug 5, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Service Bulletin - Oil leak at timing chain tensioner inspection cover due to possible insufficient sealant adhesion on inspection cover.
A25-074 · Service Bulletin/Repair Instructions · issued Jul 29, 2025Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2018-2024 Accord 1.5Ls, 2021-2024 Civics 1.5Ls, 2023-2024 CR-Vs 1.5Ls, and 2017 Fits with customer complaint of Check Engine Light (CEL) on…
ATI&12022024909 · Other · issued Dec 3, 2024
Engine problems in other Accord years
| Year | Reports | Share |
|---|---|---|
| 2025 Accord | 2 | 3% |
| 2024 Accord | 10 | 8% |
| 2023 Accord | 12 | 15% |
| 2022 Accord | 29 | 13% |
| 2021 Accord | 30 | 14% |
| 2020 Accord | 67 | 19% |
| 2019 Accord | 163 | 25% |
| 2017 Accord | 62 | 12% |
| 2016 Accord | 44 | 7% |
| 2015 Accord | 105 | 18% |
| 2014 Accord | 179 | 18% |
| 2013 Accord | 179 | 13% |
Other reported problem areas on the 2018 Honda Accord
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.