2018 Hyundai Elantra: Engine complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 176 owner complaints for the 2018 Hyundai Elantra that list the engine component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11771561 (filed 10/16/2026): “Engine mounts have been replaced already twice and they keep going bad last time was over a year ago and now it's bad again making noises vibrate and this replacement was done by the dealership with parts from hyundai apparently under warranty and now warranty is almost done worries me that in a yea…”
- NHTSA complaint ODI #11768382 (filed 10/01/2026): “While driving the engine light came off and car shut down instantly. i see there is issues with the 2018 hyundai elantra but i’m coming ot if picket. $7678.50 i purchased the vehicle i. zmay and purchased a standard warranty that covers $2500 per repair. i have a 30/3 tucson and love that vehicle! …”
- NHTSA complaint ODI #11759098 (filed 08/24/2026): “After the car was started, i drove 3 houses over when there was a loud knocking sound and the car just shut off. when trying to restart it wouldn't and the check engine, battery, and oil lights came on. after pushing it out of the road we checked the oil and it was empty. the oil has just been chang…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
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Sources
Page last updated .