2020 Hyundai Elantra engine problems

105 owner complaints filed with NHTSA name the engine on the 2020 Hyundai Elantra — 42% of all complaints for this model year.

105

Engine complaints

42%

share of all complaints

32,500 mi

median reported incident mileage

3 / 4

crash / fire reports

What owners report

“The vehicle entered limp mode. The Hyundai dealer diagnosed a camshaft problem, said the repair would be covered, ordered the part, and began the work. After the engine was opened, the dealer noted sludge/varnish and denied coverage, claiming lack of maintenance. This VIN is included in safety…”
filed Sep 10, 2026
“2020 HYUNDAI [XXX], VIN: [XXX] Incident Description: On XXX I was pulling into a parking spot and had my foot firmly on the brake pedal. When I attempted to shift the vehicle into Park the engine suddenly revved up excessively. The vehicle then accelerated forward on its own and crashed into a…”
filed Sep 9, 2026
“The contact owns a 2020 Hyundai Elantra. The contact stated that while driving 25 MPH, there was an abnormal rattling sound coming from the engine, with the check engine warning light illuminated. The contact pulled over to the side of the road. The vehicle was restarted but unexpectedly stalled. The vehicle was taken…”
filed Sep 2, 2026

Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.

Certain Elantra (ADA) vehicles may have been incorrectly updated with Cylinder Noise Detection System (CNDS) software that can set DTC P132700; this software was intended only for Korean-built Elantra (AD) vehicles…
26-01-039H TSB · Service Campaign · issued Aug 6, 2026