2021 Toyota Corolla electrical problems

Filed Oct 7, 2026 · Electrical, Engine · TX

"Engine maintenance required" light is coming up constantly, only when i turn on the AC and doesn't let me view my dash at all. Ive determined it's the Engine coolant bypass valve. Many models have had this same exact issue and there needs to be a recall/repair at no cost to the owners.

Filed Jul 21, 2026 · Electrical, Engine · CA

This Toyota Corolla hatchback is experiencing an issue where it is constantly giving an “ENGINE MAINTENANCE REQUIRED” light and when scanned, it says “coolant bypass valve malfunction”. There is already a recall for many Toyota Corolla Sedans experiencing this issue of this bypass valve being defective, but because this is a hatchback, it is not part of the recall when it should be. There is already a recall for vehicles affected with this issue: T-SB-0112-24

Filed May 16, 2026 · Electrical, Engine · CA

The vehicle displays an “Engine Maintenance Required” warning message shortly after the air conditioning is turned on. The warning does not usually appear immediately at startup but consistently appears when the A/C system is activated. The vehicle currently remains drivable, but the issue appears related to the engine cooling system and may involve the coolant bypass valve/flow control valve, which has been widely reported by other owners of similar model vehicles. The problem raises safety concerns because a cooling system malfunction could potentially lead to overheating while driving. The issue has been reproduced multiple times. A generic code scan at an auto parts store did not show stored engine codes. The vehicle was taken to a Toyota dealership and Toyota customer service was contacted regarding known coverage programs related to this issue, but the VIN was reportedly not included. Warning symptoms first appeared during normal driving and continue intermittently whenever the air conditioning system is used.

Filed Mar 20, 2026 · Electrical · GA

Coolant bypass valve has shorted out. “Engine maintenance required” notification popped up on the gauge cluster

Filed Feb 25, 2026 · Electrical · CA

Today I noticed that both of my door front locks passenger and driver side do not even actuate to have the door locked and unlocked by key of by the alarm. They completely stopped working. Even I contacted Toyota Corporate several times about this issue (800) 331-4331 and got ignored. This is a safety issue that needs to be addressed immediately. This is a safety concern for me and family.

Filed Dec 27, 2025 · Airbags, Electrical · CA · crash · 1 injury

On December 12, 2025, I was in a head on car accident in my 2021 Toyota Corolla nightshade. I was slammed into the steering wheel which caused injury. My car has over $14,000 worth of damage to the front yet my airbags did not deploy. I have taken my car to Toyota several times over the past few years and every time I’ve asked about a remedy for this recall I’ve been told there is no remedy as early as June or July 2025 I had to bring my car in for a manufacturer defect with the engine that Toyota fixed for free. I asked them about the recall on the airbags. They again told me there was no remedy.

Filed Nov 5, 2025 · Electrical · GA

The navigational systems shuts off in the middle of driving. The screen will go completely black making it unsafe when using navigational directions. The system also shuts off at the slightest pot holes. Windows also won’t work when trying to put them down from the drivers side

Filed Oct 22, 2025 · Electrical, Steering · WI

The problem of windshield wipers going off either once, or at varying speeds has not been able to be reproduced by my Toyota dealership. It goes off right when I turn the car on 50% of the time and is very inconsistent. Wipers typically go off after using the turn signal, making long turns (such as into a parking spot), and driving on long curved roadways. It has been inspected and nothing has been found. There are no warning lights or messages.

Filed Aug 12, 2025 · Electrical · 110,000 miles · NJ

Odometer Fraud. The contact purchased a 2021 Toyota Corolla. The contact stated that while attempting to sell the vehicle to a Toyota dealer, the dealer informed the contact that there was a mileage discrepancy. The vehicle was a used car dealer sale. At the time of purchase in October 2024, the vehicle mileage was 60,000, and the current mileage was 74,000. However, the dealer informed the contact that the mileage on the Carfax report was 110,000.

Filed Aug 7, 2025 · Airbags, Electrical · CA · crash

My vehicle was backed into while ì was inside of it in a parking lot. Due to my horn failing., I was unable to alert the other driver to see me. The clock spring is what failed the first time at 95k they replaced it. I'm now at 147k and it failed again . Now I'm discovering that if it does not work, there's an electrical circuit failure and that the airbag will not deploy if I get in an accident. This is a serious safety issue and I feel Toyota should be responsible for it for the life of the vehicle . A horn should never go out. Especially if it not working will keep my air bag from functioning properly . 850 out of my pocket is way steep. The replacement part lasted half as long as the original part did when I bought the car that to me seems like a faulty part this should be obvious and they should just fix the problem cuz I might have to just consult an attorney should they choose not to. The attached photo shows what happens when you can't beep your horn at somebody who's about to back into your car !!! my car still has not turned on any kind of warning lamp for the airbag or any kind of malfunction light, no warnings on my radio. I have noticed that my Lane departure warning seems to work intermittently along with the automatic high beams that like to flash my high beams in people's face for some unapparent reason which also seems like a safety issue. If I had to take my car to an inspection station it would not pass an inspection due to the horn not working ! You cannot take your child to the Department of Motor Vehicles and let them take their drive test if your horn does not work ! which happened to be my case !! Very disappointing to say the least especially when you've paid $30,000 for a car.