2020 Toyota Corolla electrical system problems

29 owner complaints filed with NHTSA name the electrical system on the 2020 Toyota Corolla — 10% of all complaints for this model year.

Electrical System complaints

10%

share of all complaints

37,500 mi

median reported incident mileage

0 / 1

crash / fire reports

What owners report

“The contact purchased a 2020 Toyota Corolla. The contact stated that they discovered a mileage discrepancy after the purchase. The vehicle was a private sale on Facebook market. At the time of purchase, the vehicle mileage was 52,000. It was later discovered that the vehicle’s title mileage was…”
filed May 21, 2026
“when I use blinker windshield wipers turn on and sometimes when I call or somebody calls my cell phone I can hear them, but they cannot hear me. does not happen all the time, but I was concerned since there was a recall on certain toyota corolla that says a short circuit may develop in the OCS…”
filed Jan 30, 2026

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

OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.
T-SB-0106-22 Rev2 · Service Bulletin/Repair Instructions · issued Jan 30, 2026
Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software.
T-SB-0001-26 · Service Bulletin/Repair Instructions · issued Jan 28, 2026
Some 2021 – 2022 model year Avalon, 2018 – 2024 Camry, 2019 – 2025 model year Corolla, 2022 – 2025 model year Corolla Cross, and 2019 – 2025 model year RAV4 vehicles with A25A-FKS and M20A-FKS engines may have a MIL ON…
T-SB-0010-24 Rev2 · Service Bulletin/Repair Instructions · issued Jun 25, 2025