Power Train Problems of Toyota Corolla - part 1

Clutch slave cylinder at 51,000 miles failed causing vehicle clutch to not return and loss of fluid. Brake fluid and clutch fluid are used in the same reservoir and could cause issues causing vehicle to not be able to stop. Vehicle has been inspected by shop and has been replicated. The part exploded and leaks fluid inside of transmission housing. This also causes the clutch to fail as-well. Vehicle has always been serviced and maintained and this is a common issue with all vehicles that have 6 speed manual transmission with varying mileage. It is not a matter of if, it’s when and due to this being something that happens with generally no warning signs can be dangerous. There needs to be an updated part that can handle the design Toyota chose for this transmission.

See all problems of the 2020 Toyota Corolla 🔎.

I am filing this complaint regarding a serious defect in my 2021 Toyota Corolla (manual). At approximately 42,000 miles, the clutch slave cylinder failed. This defect caused hydraulic fluid to leak and contaminate the clutch assembly, resulting in significant damage and loss of proper function. Despite the fact that this issue stems from a defective part, the dealership has refused to cover the repair of the clutch assembly, stating that the clutch is not covered under warranty. Instead, they are requiring me to pay for the repair out-of-pocket, which would not have been necessary if the damage had not been caused by the defective clutch slave cylinder. I believe this is unfair and unsafe, as the failure of a clutch slave cylinder directly impacts the drivability and safety of the vehicle. This is a significant safety issue. A defective clutch slave cylinder can lead to sudden clutch failure, loss of vehicle control, and increased risk of accidents. This is not a wear-and-tear issue but a manufacturing defect that compromises the safety of the vehicle. I respectfully request that NHTSA investigate this matter to determine whether similar failures are occurring in other Toyota Corolla vehicles of this model year. If this is a widespread defect, I urge NHTSA to take appropriate action, including a recall or requiring Toyota to cover repairs.

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My 2016 Toyota Corolla suddenly showed a check engine light, and the dealer diagnosed a cvt transmission failure with code p2757. This code is linked directly to Toyota’s own TSB t-sb-0150-16 for torque converter clutch/valve-body failure. The dealer confirmed the issue and quoted me $11k to fix it. This is frightening because a failing transmission can slip, hesitate, or lose power at any moment, which puts me and others at risk. There were no early warning signs, just the sudden light. I brought it in immediately, and the problem was fully reproduced and documented by Toyota. My car is available for inspection whenever needed. Toyota corporate reviewed my case but offered very little help since my vehicle is just outside the 7-year timeframe for CA. I bought the extended warranty when the car was brand new. I have done every single service at Toyota, always on time, and my car has never been in an accident. I’ve taken care of it exactly the way Toyota told me to. This is not normal wear. This is a documented defect that puts drivers at risk and places an enormous financial burden on owners who did everything right. I’m filing this complaint because people deserve protection, accountability, and fairness, especially when a safety-related failure happens in a well-maintained vehicle. I’m only [xxx] , and I expected to own many more Toyotas throughout my life. My whole family drives Toyotas. I grew up believing this brand meant safety, reliability, and loyalty in both directions. I honestly wanted to be a Toyota driver for life. But facing an $11k repair for a known issue that Toyota already acknowledged in a TSB—without meaningful support—has broken my trust in a way I never expected. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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The slave cylinder failed at 33,186k. So, now the car is needing a new slave cylinder and clutch because the clutch has been contaminated.

See all problems of the 2022 Toyota Corolla 🔎.

This is in regards to Toyota csp 24te04 and the engine bypass system. This was also included in a class action lawsuit that got dropped. Engine bypass system is faulty and shows check engine requiring replacing of bypass valve and or wiring. According to 24te04 it has been affecting over 2 million cars, but not all are being fairly covered. They need to include all models with this system that were produced during this time. Thank you.

All 2019-2022 Toyota Corolla 6 speed manual transmission cars are affected. The slave cylinder is a defective part that fails prematurely anywhere between the 20,000-70,000 mile range. The slave cylinder on this car is made out of plastic and is located inside of the transmission, when the slave cylinder fails, it leaks brake fluid all over causing the car to lock into gear and not be able to shift which is a major safety risk when there is no signs of failure. My car locked up in the middle of a busy highway and had to be pushed off the side of the road. Not only is this a safety risk, but since the part is located inside of the transmission, which is not normal, it leaks brake fluid all over the clutch and flywheel, which will all need replacement. The dealership quotes between 4-5 thousand dollars to repair, and is not covered under warranty. Toyota knows that this part is a defective part because the new models received an updated slave cylinder made out of metal, rather than plastic, but no cars have been recalled. The car was towed to my local dealership and it is currently being worked on. The incident was reported to Toyota corporate and a case was opened to investigate this issue. Every single model made between those years are effected and has caused thousands of people to be left with an expensive repair that is unavoidable.

See all problems of the 2019 Toyota Corolla 🔎.

During a routine transmission fluid service on a 2024 Toyota Corolla hybrid, I discovered that the transmission model (pa10) is completely unlabeled and cannot be identified anywhere under the hood, in the owner’s manual, or on any visible tag. The only label is buried behind the firewall and not reasonably accessible to consumers or technicians. As a result, I initially attempted to service the wrong fluid port because Toyota provides no visible or clear identification of the transmission model or fill/drain points. Additionally, the factory-installed transmission drain and fill bolts were tightened with extreme torque well beyond normal service specifications, requiring application of high heat and excessive force to loosen. This resulted in personal injury and risk of property damage. The combination of (1) inaccessible transmission identification, (2) inadequate service guidance, and (3) extreme bolt torque creates a foreseeable safety hazard to vehicle owners or technicians attempting basic maintenance. Toyota’s official service documentation (Toyota technical information system, “tis”) that clarifies the correct fill ports is paywalled and not included with the vehicle or manual, making it impossible for consumers to safely perform essential maintenance without paying daily access fees. This lack of accessible labeling and over-torqued components presents an avoidable risk of physical injury, vehicle damage, and mis-servicing. I believe Toyota should be required to provide visible transmission identification and safe torque specifications for consumer maintenance.

See all problems of the 2024 Toyota Corolla 🔎.

At 97,000 miles, the slave cylinder in my vehicle blew. My clutch pedal had stuck to the floor, and my brakes became harder and harder to press down because the clutch takes from the brake fluid reservoir. Brake fluid began to leak from the transmission, and it had to be towed in. If I hadn't come to a stop, I could have gotten in a horrible accident.

I have had several issues with the car. As issues have not been address problems become more unsafe. Most recently I have had intermittent issues with steering. The wheel will randomly be hard to turn leaving the car to drift uncontrollably. I have gone to the dealership but because they cannot replicate the issue nothing has been done. I have gone 3 different times to get them to address the concern but they cannot replicate it so they have not examined anything. They turned off the safety setting instead of checking the adas and since turning off the systems the issues are less frequent, but still a concern. I have contacted corporate who has not helped come to a resolution to ensure the vehicle is safe to operate.

My clutch slave cylinder broke. This is a known problem for 6mt Toyota Corolla hatchbacks yet there hasn't been a recall. Some go bad as soon as 40,000 miles which is very premature.

The contact owns a 2020 Toyota Corolla. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact became aware of an abnormal clunking sound, and that the check engine warning light was illuminated. The contact stated the failure had occurred while driving on a busy road. The contact attempted to shift the gear shifter into different driving modes; however, the vehicle failed to accelerate as intended. The contact stated that several good samaritans pushed the vehicle into a nearby driveway. The vehicle was taken to an independent mechanic where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 64,000.

Rattle in transmission. Car hesitates to accelerate randomly leading to unpredictable acceleration sometimes. Transmission is failing.

I was driving on the freeway on my way to the house my car start to make some noises and I was loosing power I pulled up on the shoulder and turn off the car because the check engine came on turn off the car again but was struggling to go into first gear.

My car has 5358 miles. Started car. Drive start control malfunction light; check engine light; see dealer light all came on. Car would hardly move forward or reverse. Felt like the brakes were on. Heard subtle clicking sounds from engine. Looked this up as I never heard of this. Toyota says you must stop driving ASAP, assuming you "can" drive. You can loose control of the car. There are many things that can cause the light to come on. Dealer "says" they never heard of this. My car had to be towed. Mechanic found nothing wrong and reset computer modules. I got my car back after 3 days. Dealer says no guarantee it won't happen again without warning. So; anywhere, anytime, my car will just stop driving? how is this safe? internet searches show it's not uncommon. Toyota makes it hard to file a complaint.

Slave cylinder failure. 90,000 miles. Multiple complaints about the issue.

I have a 2019 Toyota Corolla hatchback. The problems started on July 21st, 2025. While driving my 2019 Toyota Corolla hatchback, I noted white exhaust smoke, even after the engine was warm. One week prior, I had filled the coolant reservoir, but when I checked it, the coolant was almost gone again. There were no visible leaks or puddles under the car. I refilled the coolant, but within days the car began shaking severely upon startup and emitted a coolant-burning smell. 5 minutes after, multiple warning lights illuminated on the dashboard simultaneously. I replaced the car battery, and the warnings disappeared. However, while merging onto the freeway, the same warning lights came back, the car lost power, and I could not accelerate above ~25 mph. If this occurred in heavy traffic, it could lead to a serious collision. I exited the freeway and had the car towed. Dtcs from the independent mechanic and the Toyota dealer included: p11ed00 p030085 p030027 p030200 (cylinder 2 misfire) c142571 (stop light relay actuator stuck) u1117 b2284 b15ad the Toyota dealer identified a “port injector #2 malfunction” and recommended replacing all four injectors (~$2,000) but could not confirm this would fix it. They noted a coolant-burning smell but advised addressing the misfire first before further diagnosis. There is an active class action lawsuit alleging that 2019–2023 Toyota Corolla and rav4 models have defective coolant bypass valves that may cause engine issues, overheating, or coolant loss without visible leaks. This matches the coolant loss, white exhaust smoke, and eventual power loss while driving. I request that NHTSA investigate this issue in connection to the reported coolant bypass valve defects affecting 2019–2023 Toyota Corolla models.

Clutch pedal sticks. Even after Toyota dealership bled lines. Apparent slave cylinder issue. Failure ranges from 35k to 80k miles. Faulty design using polymer is the internet’s general opinion.

Drive start control malfunction occurred when turning the car on. Second time this has happened. First time was a charcoal canister and engine coolant valve. It was replaced under warranty at 50k miles but now at 96k miles the dealer says it is not covered under the extended warranty. Not sure how this problem happened.

I just had to replace my transmission. 2 days later I have my check engine light, secondary collision, pre collision and parking brake malfunction lights came on. There is a osc recall that could cause these issues, but they’re saying stated my specific vehicle isn’t under a recall.

Beginning on April 18, 2025, my 2020 Toyota Corolla le began experiencing repeated failures involving multiple safety systems while driving. Without warning, several lights illuminate at the same time, including: brake system malfunction, pre-collision system, parking brake system, vehicle stability control, check engine, and secondary collision brake system. These warnings appear suddenly during normal driving, then sometimes disappear, then return again unpredictably. These failures disable several integrated safety systems and create a serious safety risk due to changes in braking performance, loss of stability control, and disabled collision-avoidance functions. Diagnostic scans from both the dealership and an independent mechanic repeatedly show: p1578 — brake system malfunction p265b — rocker arm actuator position sensor circuit range/performance (bank 1) both codes reappear even after being cleared. The vehicle was with loving Toyota lufkin, TX multiple times over seven months. They received over $7,100 in insurance payments for repairs, $463 towing cost (due to the negligence of loving Toyota) and almost $1,500 in rental cars (paid by state farm) but were unable to diagnose or fix the underlying failure. Loving Toyota also provided a courtesy rental for 7+ weeks while they did no repairs to the car. The safety warnings continue to occur. Toyota corporate is now involved but the vehicle remains unsafe to drive. The same code p265b is present that was present back in April 2025. This car is not safe! the problem has been reproduced by me, the dealership, and an independent shop. The vehicle is available for inspection. All scans, photos, videos, and documentation are available upon request. Date first occurred: April 18, 2025 issue continues intermittently to present day.

Manual transmission intermittent failure to/rough to engage first gear and reverse. Clutch slave cylinder high rate of failure/total failure of manual transmission. Transmission incidents happen at least once per day.

The "engine maintenance required" message on a 2020 Toyota Corolla se keep coming on after I have reset numerous time. The "engine maintenance required" message on a 2020 Toyota Corolla se typically indicates a problem with the coolant bypass valve, not the regular maintenance schedule. This message is distinct from the "maintenance required" light that usually prompts oil changes. The coolant bypass valve issue often results in a dtc code and may require replacement.

The contact owns a 2016 Toyota Corolla. The contact stated while driving at an undisclosed speed, the vehicle downshifted with no warning light illuminated. The contact also stated that the steering wheel seized with no warning light illuminated. The contact stated that the steering wheel became difficult to turn. The vehicle was able to restart. The vehicle was taken to an independent mechanic, where it was diagnosed that the steering module and the transmission had failed and needed to be replaced. The vehicle was not repaired. The vehicle was taken to the dealer but was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 43,000.

Approximately one month ago the clutch pedal on my manual 2020 Corolla went all the way to the floor and stuck in place. Had it towed to my mechanics shop and it took them nearly 2 weeks just to get a slave cylinder to replace the defective part with. Fast-forward a week later and exactly the same thing happened. According to several different threads I have read online, this seems to be a problematic situation with the manual Corollas. Hopefully I will not experience any further problems however it appears that the defective slave cylinder part is to blame.

Falla en tren motriz o transmisión.

See all problems of the 2015 Toyota Corolla 🔎.

My 2019 hatchback clutch failed clutch release bearing and slave cylinder assembly is leaking. Toyota part # 31400-19027.

Clutch throwout bearing went out at 69,000. Clutch pedal began getting stuck half way through pedal travel, then got stuck to floor. Lost all clutch operation.

As I was driving my check engine light turned and also another message saying “drive-start control malfunction”. A few second after another light came one showing “engine coolant temp high. On 11/24/24 I experienced this mechanical failure as I was driving. I was driving behind another car, where my car suddenly lost power and randomly accelerated almost causing me to crash behind the car in front of me. Thankfully I had time to press on the brakes to prevent me from crashing. I also did some research to see if other drivers also experienced this fault and seems that a lot of people with these Toyota Corolla and rav4 models. I also found that an active lawsuit is ongoing against Toyota regarding this same issue. This definitely should be something that needs to be recalled as it puts our lives at risks to either crash or even catch on fire due to overheating. My vehicle gets serviced regularly.

The transmission slave cylinder on this vehicle leaks and causes multiple issues with the transmission. It is a known issue among all manual transmission owners and resulting on average 4000 dollar repair.

No warning lamps, and no accident yet; however, I believe if I continue driving it without repair, it is a safety risk. The sound I can hear coming from cvt torque converter, impeller blades is getting louder the more I drive them vehicle. This was confirmed by a transmission service center (see photo) who identified a Toyota recall j17/j07 (NHTSA recall campaign 18v901000), which lists the 2019 Toyota Corolla hatchback with the same cvt as my vehicle. When I contacted Toyota (see screenshot), I was told I would be responsible for the repair because there's no recall associated with my vehicle VIN pertaining to cvt torque converter.

While driving and attemping to merge on highway heard a loud pop and bang sound from car car started rolling like vehicle was in neutral. This is a safety issue due to this involving the transmission and couldve caused an accident if vehicle was on highway. Warning lights such as the check engine light, traction, abs, and multiple other messages on dash.

Transmission slip, hard shifting, early or late shift. Automatic transmission.

This is an issue I have noticed with my car shortly after I bought it. The problem is that the car has a noticable delay in acceleration when accelerating from a complete stop. After doing some research online, I found that the cause was the car's cvt transmission, and that a delay in acceleration happens with other cars with cvt transmissions as well. This could be potentially dangerous especially when making right turns on a red light or when making unprotected lefts on a green, as the window of opportunity to go is sometimes short in those situations, and delaying for even a second could mean the difference between a collision or a safe turn (especially since there are some fast drivers that go much past the speed limit and will appear from behind a hill all of a sudden). What is especially problematic is that the car will rarely accelerate normally when I press the pedal, but I would say around 80-90% of the time, the car will have a delay about 1 second before it actually starts moving. To my knowledge, this problem has not been reproduced or confirmed by a dealer or independent service center. I bought the car brand-new about half a year ago so it shouldn't have any problems. The vehicle has not been inspected by anyone, and there were no warning lights or any other symptoms of the problem prior to the failure. I didn't really notice that this car had this problem when I first drove it home from the dealership because I was not used to so many other aspects of the car, but after I got more used to driving it, I realized that the delay in acceleration wasn't normal.

Engine coolant bypass valve.

Brand new car with 300 miles jerks and jolts leaving from a stop and hesitates going up hill. Feels like car has no power behind it. Forward collision also breaks randomly. Currently at dealership.