2018 Mazda MAZDA3 engine problems
12 owner complaints filed with NHTSA name the engine on the 2018 Mazda MAZDA3 — 11% of all complaints for this model year.
What owners report
“My 2018 Mazda 3 has an intermittent electrical failure on the high-speed CAN network that causes multiple safety-critical systems to fail while driving. When the fault occurs, the dash lights up with warnings for powertrain, ABS/traction, lane departure, collision-avoidance, TPMS, immobilizer, and…”
filed Nov 19, 2025
“What component or system failed or malfunctioned, and is it available for inspection upon request? The high-pressure fuel pump failed. This component failure prevents the car from starting or staying running. The check engine code confirmed the high-pressure fuel pump failure. The failed component…”
filed Oct 20, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Incorrect exhaust valve spring may fail while driving, potentially causing an engine stallCampaign 17V745000 · Nov 21, 2017
Related service bulletins
This SA supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-061/25 12/17/25 DESCRIPTION If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s)…
SA-041-26 · Service Bulletin/Repair Instructions · issued Jun 19, 2026This Service Alert supersedes the previously issued M-Tip(s) listed below. The changes are noted in Red text. MT-002/19 09/30/19 and 12/19/19 DESCRIPTION If an engine assembly is replaced after a catastrophic internal…
SA-026-26 · Service Bulletin/Repair Instructions · issued Apr 16, 2026This Service Alert supersedes the previously issued SA(s) and TSB(s) listed below: The changes are noted in Red. SA-035/24 05/31/24 DESCRIPTION There is a concern that some water pumps are being replaced that are not…
SA-014-26 · Service Bulletin/Repair Instructions · issued Mar 11, 2026
Engine problems in other MAZDA3 years
| Year | Reports | Share |
|---|---|---|
| 2022 MAZDA3 | 2 | 9% |
| 2021 MAZDA3 | 18 | 37% |
| 2020 MAZDA3 | 1 | 3% |
| 2019 MAZDA3 | 11 | 15% |
| 2017 MAZDA3 | 5 | 6% |
| 2016 MAZDA3 | 7 | 7% |
| 2015 MAZDA3 | 6 | 5% |
| 2014 MAZDA3 | 13 | 9% |
| 2013 MAZDA3 | 11 | 9% |
| 2012 MAZDA3 | 32 | 14% |
| 2011 MAZDA3 | 3 | 2% |
| 2010 MAZDA3 | 22 | 3% |
Other reported problem areas on the 2018 Mazda MAZDA3
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.