2023 Toyota Corolla engine problems

13 owner complaints filed with NHTSA name the engine on the 2023 Toyota Corolla — 18% of all complaints for this model year.

Engine complaints

18%

share of all complaints

—

median reported incident mileage

1 / 0

crash / fire reports

What owners report

“after fueling strong fuel smell in vehicle within 100 miles check fuel cap light came on. next day check engine light came on. made appointment at dealership . dealership performed evap smoke test which found smoke coming from top of fuel cell. installed fuel pump ring and evap hose clip. performed…”
filed Dec 23, 2025
“I got a message that the engine needs maintenance and I should go to the dealership and have the coolant bypass valve repaired. I see there's a lawsuit against Toyota for a manufacturing defect in that component on 2019-2023 Corollas. I'd like to know if I'll get a refund.”
filed Oct 25, 2025

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

OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete.
T-SB-0104-21 Rev2 · Service Bulletin/Repair Instructions · issued Feb 27, 2026
OBSOLETE NOTICE August 19, 2025: This bulletin is now obsolete. Please see T-SB-0059-25.
T-SB-0088-23 Rev2 · Service Bulletin/Repair Instructions · issued Aug 19, 2025
Some 2020 – 2025 model year Corolla vehicles may exhibit a vibration or rattle noise from the right-hand engine mounting insulator sub-assembly. This condition will usually go away when the engine’s Revolutions Per…
T-SB-0059-25 · Service Bulletin/Repair Instructions · issued Aug 15, 2025
OBSOLETE NOTICE February 11, 2025: This bulletin is now obsolete. Please see T-SB-0021-25.
T-SB-0107-20 Rev2 · Service Bulletin/Repair Instructions · issued Feb 12, 2025