2019 Toyota Highlander Complaint Log

I was nearly in an accident because the vehicle was unable to accelerate quickly due to transmission shift delay.

Erratic shifting, dangerous hesitancy and slow starts when pulling into traffic, whining. Took the car to the Toyota Dealer on 08/19/2025, diagnosed as having a failing transmission (detailed service invoice attached).

Our 2019 Toyota Highlander currently has 54,605 miles. In August 2025, when the vehicle had 50,236 miles, we brought it to the Toyota dealership to address a whining noise coming from the transmission. At that time, the vehicle was still under the manufacturer’s warranty. The dealership performed a transmission service during that visit. Within the following weeks, however, the whining noise returned, and the vehicle began experiencing hard and delayed shifting. Our children and grandchildren have recently moved to Washington, and we had planned to drive there to visit them. Unfortunately, we are now reluctant to drive the vehicle due to safety concerns, as we have been advised that the transmission may be failing. The dealership has now recommended a full transmission replacement. Because the original concern was reported while the vehicle was still under warranty, we believe the issue should have been properly diagnosed and resolved at that time. However, the problem was not addressed, and the vehicle is now outside the warranty period, with Toyota declining to cover the cost of the replacement transmission. Given that the problem was first reported while the vehicle was under warranty, we are requesting that Toyota reconsider covering the transmission repair or replacement.

Clog of evaporator box caused water intrusion into vehicle. Water leaked onto Airbag ECU causing malfunction and requiring replacement of Airbag ECU.

While driving, I began noticing a high-pitched whining or buzzing noise when pressing the accelerator, particularly at low speeds. The sound resembles an electric or remote-control car and rises in pitch with engine RPMs. The noise disappears when I release the gas pedal. A mechanic initially suspected a wheel bearing, but after further inspection, it appears the noise is coming from the transmission or drivetrain. I later discovered that this issue is widespread among 2017–2020 Toyota Highlander models equipped with the UA80E/UA80F 8-speed automatic transmission, which has been associated with internal gear and pump whine. Toyota has issued Customer Support Program POL19-04 and Technical Service Bulletin T-SB-0008-21 addressing similar transmission whine and gear damage, but my vehicle is outside the standard 5-year/60,000-mile warranty and was not included in the extended coverage list, even though the symptoms match exactly. The problem appears to be a design or component defect within the UA80-series transmission, leading to premature wear and potential failure. This can affect drivability, safety during acceleration, and could result in transmission failure without warning.

8-speed automatic transmission failing. Noticeable whining sound that increases with acceleration, however no warning lights or messages. Metal shavings found in fluid upon inspection by independent mechanic. This is exactly in line with the lawsuit, filed in the U.S. District Court for the Central District of California by plaintiff [XXX] . INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I’m reporting a drivetrain and engine performance issue affecting my 2019 Toyota Highlander, which I believe is related to Toyota's T-SB-0160-18, T-SB-0008-21, and Customer Support Program ZJC (CSP ZJC). My vehicle is exhibiting the same symptoms like: 1. Intermittent engine misfires (no consistent CEL, but noticeable during driving) 2. Hesitation and shuddering during light or moderate acceleration 3. Unintended surging/lunging — the vehicle will randomly jerk forward without throttle input 4. Whining noise under acceleration, which appears to come from the engine bay These symptoms negatively affect vehicle control and driver confidence, especially when merging, passing, or driving in traffic. The behavior is unpredictable and poses a potential safety hazard. After researching, I found that Toyota issued T-SB-0160-18 and T-SB-0008-21 for this engine, acknowledging similar performance issues due to valve train irregularities and ECM programming. Toyota also released Customer Support Program ZJC, offering limited support to some VINs. However, despite my vehicle showing the same symptoms, it is not included in the CSP, and Toyota has not offered assistance without out-of-pocket costs. This issue appears to be more widespread than Toyota’s internal VIN list suggests. Many Highlander owners have reported the same issues online, and I believe Toyota should take responsibility for correcting these performance defects under a recall, not a limited CSP. I respectfully request that the NHTSA investigate the scope and validity of Toyota's CSP ZJC and TSBs related to the 2GR-FKS engine and push Toyota to expand CSP ZJC or issue a formal recall to cover all affected vehicles based on symptoms, not just VINs

My car only has just over 70,000 miles and my transmission failed. I get regular maintenance services when needed and never had any prior issues with transmission. I was driving when the transmission failed on me leaving me stuck on the road. I took the car to Toyota service center and was told it needs to be replaced and no further details.

3 of the 4 door lock actuators do not work properly. Some don't lock and some don't unlock. The only door that currently works is the driver's door. If I don't realize that a door did not lock someone can break into my vehicle.

The AC stopped working on our 2019 Highlander. The vehicle has very little corrosion underneath or in the engine bay, yet the rear AC lines have corroded at a location where two different types of metal contact each other. This has been happening with many highlanders after 5 years, and the cost to replace is expensive.

Car started to make whining noise when accelerating, was taken to a car repair shop & it was found that the transmission will need to be replaced with only around 43k miles on the vehicle. Let it be noted that there are many other people on numerous Toyota forums complaining of the same issues.

Upon expiration of the SOS Subscription the DCM creates a loud feedback noise that goes through the passengers speaker and is causing hearing loss every time the vehicle is turned on. Has been documented many times on Reddit from other owners of 2019 highlanders

Our transmission is making a high pitched whining sound when accelerating.

Check engine light has came on. Code p107b which is what the recall for this vehicle year has but doesnt incude my vin.

The contact owns a 2019 Toyota Highlander. The contact stated that while driving at various speeds, there was an abnormal whining sound coming from the transmission. Later, while the contact’s wife was driving approximately 50 MPH, the vehicle went into LIMP Mode and decelerated unexpectedly. The contact diagnosed the vehicle and determined that there was a failure with the torque converter. The local dealer was notified of the failure, but no assistance was provided. The vehicle was not repaired. The manufacturer was not yet notified of the failure. The failure mileage was 128,000.

Defect with Transmission as hundreds of other people if not, thousands have already stated. Whining noise from Transmission after only 70,000 miles such a big issue that Toyota has a backorder on replacement transmissions.

A wine and hard shifting, toyota does not agree. I experience this issue several times a day. Taking it into the dealership again to try to diagnose.

Hi. I have a Toyota 2019 Highlander EXL. My problems is the transmission started to have the small whining noise every time I accelerates and I it's happened over 18 months ago and I didn't know that is the issues until I brought it to the Toyota Dealer for 75k maintenance. The Dealer has told me that the noise was abnormal and it's from the transmission and it's will cost me $13 K to replace with a new one. I believe in Toyota quality but now I will have to really think about it again for the next purchase ?. I don't understand why Toyota has known this issues because of many reported but never intend to fixed it. I'm not so happy with this . Please ask ToyoTa Corp to answer and do take the responsibility before someone is getting hurds Thanks Tom le

I had just driven up a steep driveway and made a slightly sharper than 90 degree turn at a very low speed to pull into a home parking spot when the car lunged forward suddenly and slammed into the stone wall of the house at a high speed. The section of this driveway after the turn is only 2.5 car lengths, but the car picked up enough speed to smash the front of the car in. The car was totaled and driver and side curtain airbags all deployed. I do not know why this happened as there is no way I would have hit the gas hard while pulling up to a building to stop. I also would not have slammed on the gas thinking it was the brake since there would have been no reason to slam on the brake when I was only going 5-10 miles per hour max around the tight turn. My shoe was not caught on a pedal, both sandals were still on my feet after the accident. I am not a two footed driver. I feel that it was an accelerator malfunction, as the gas pedal had always been a little strange with a delayed response, but may have also involved the transmission after driving up the steep hill and then returning to a short but flat stretch leading up to the house. I was very bruised up, particularly my shins and ankles. Two months later, I still have some visible bruising. I also had injuries from the seat belt on my chest and what appeared to be a powder burn from the airbags. I was quite traumatized by the sudden acceleration and violence of the crash and not understanding how or why it happened. If someone had been standing in front of the house to greet me on my return, they would have been killed. The car was towed away and totaled by the insurance company, so the problem hasn't been reproduced or confirmed. There were no warning lamps or messages that I'm aware of prior to the incident, except that the gas pedal has always felt inconsistent concerning when it engages. My phone self-dialed 911 and law enforcement came out to do an accident report.

Whining sound when when pushing the gas to accelerate. When you let go of the gas it stops.

When I start the Highlander, there is a loud (hurts your ears) feedback noise through the speakers, and the red and green lights near the SOS button flash multiple times. This happens intermittently, and when it doesn't happen the SOS button only flashes red/green once. My wife, the primary driver of the car, has slowly developed tinnitus and this is the only loud, ear piercing, noises she have been exposed to. This noise can also bring on extreme headaches. I can't imagine the damage it could do to a child. We have tried to get this fixed at the mechanic and Toyota says the part is backordered. When we go to Toyota they state they have not heard of the issue. When we search the internet it is easy to find threads of this same issue on the same model, Toyota seems to be hiding this is a known issue.

Less than 95k miles. Dealer says transmission needs replaced and cooler. Bought new- owned 5 years and 2 months. Many other 2019 highlanders online stating same problem.

• Transmission Failure. Inspection is available upon request. • We do not know if we are at risk if the transmission fails while driving. • Certified Toyota Dealership diagnosed and deemed failure – recommends full replacement • Component was inspected by a certified Toyota dealership • No warning lights

Hello, it seems that my vehicle is having a whirling noise when accelerating at different RPMs. When I researched, it isn’t an isolated incident because many others online are experiencing the same issue with most of them being told that the transmission must be replaced. And further investigation, I found that the issue could be the trans axle assembly component which can cause issues if not replaced.

Transmission started making a whining noise. Auto shop confirmed it will need a new transmission.

Upon acceleration, the engine revved high and a whine sound started once the car (2019 Highlander XLE) approached 25-40 miles per hour. It appears that this is a transmission issue that Toyota was aware about years before selling the 2019 (and later) Highlander and other models (according to consumer complaints online). The car has 92,700 miles on it and is thus out of warranty. It had a recall in 2020 though I do not know exactly what was allegedly fixed. Had Toyota disclosed these serious transmission issues, I would not have purchased the car. My local mechanic has advised that the transmission will need to be replaced at a high cost.

2019Toyota Highlander = Transmission whine and hard shift at times, Needs replacement transmission at 106,000 mile , no codes stored

Transmission failed while driving down the highway almost causing an incident. These transmissions are very unsafe and should be recalled. Toyota refuses to take responsibility for this year Highlander although it is the same 80ua transmission that was recalled in the 2017 and 2018. While Toyota has said this problem has been remedied in the later years it is very false. Please do an investigation on this before people get hurt from accidents if they haven’t already.

At approximately 85K miles my 2019 Highlander began to exhibit a high pitched “whirring” sound upon accelerating. The noise stops once you take your foot off the gas. I brought the vehicle to my local Toyota dealership to investigate the noise. They concluded that it is the transmission and I would need to replace the entire transmission. There are no warning lights or other indications aside from the sound. Transmission fluid is clear of any shavings or other indicators of an issue. Toyota service stated they could not tell me if or when the transmission might fail, just that it should be replaced. There are multiple reports of similar occurrences on online Toyota forums. There are also recalls for the exact same sound for the 2018 Highlander. I opened a case with Toyota customer service and was told there was nothing they could do to assist.

Radio head unit keeps resetting. While using navigation. Disturbing driving. Something it will continually loop resetting. Can not determine consistent cause. Would like a free replacement and or upgrade including navigation

A whinning noise can be heard from car while driving. Vehicle has just under 60k miles and dealer is saying the transmission is failing and it would need to be replaced. There was no warning lights or indication on display.

Transmission makes a whine noise and also experiencing some harsh shifting. Dealership confirmed the whine noise is an indication of transmission failure and they recommend replacing the transmission. Toyota needs to do a recall on this transmission!!

Needs transmission at 90,000 miles - original owner - well maintained car- manufacture defect according to dealer According to various websites other 2019 Toyota Highlanders have had similar issues Had 2009 Highlander that lasted til almost 200,000 with no Issues

the transmission completely failed. it is at Spitzer Toyota in Monroville. PA

Transmission failure; See attached Customer Support Program Bulletin No. POL19-04 [XXX] (for 2018 Highlanders). My vehicle is a 2019, same body style, same transmission type, etc. Toyota dealership diagnosed my vehicle today and confirmed that the issue is the same as listed in the bulletin. I filed a case with Toyota (corporate). I have located thousands of other customers online reporting the same issue as described in this bulletin. I'm requesting that Toyota modify the bulletin or create a specific one for 2019. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

2019 toyota highlander bought 3/15/25 with approximately 82,000 miles. Started making whining noise 4/7/25. On 4/9/25 took vehicle to dealer 4/11/25 notified need new transmission and transaxle seal need on new transmission. 2 weeks later on 4/25/25 picked up vehicle drove home 3 days later noticed gear oil leaking and sprayed all over under chassis. Vehicle brought back to dealer on 4/29/25. On 4/30/25 notified needs new transaxle seal on new transmission. Notified on 5/9/25 new transmission will need to be replaced again. They stated there is gouging/nicks where transaxle and transmission connect. Dealer is saying there is no transmission to put in. Toyota has put a stop to all transmissions. So now I have a vehicle with only 82,000 miles and no way to fix it.

Complaint Regarding DCM Module Failure in 2019 Toyota Highlander Platinum Our 2019 Toyota Highlander Platinum is experiencing severe audio system malfunctions, beyond simple Bluetooth and connectivity failures. The vehicle sporadically emits an extremely loud screeching feedback sound upon startup and at unpredictable times while driving. This deafening noise is highly distracting to the driver, posing a significant safety risk. Toyota has been aware of this issue for years and documented it in Technical Service Bulletin T-SB-0112-20, which identifies the faulty vehicle assembly locations. However, despite widespread reports from owners and the high cost of repairs, Toyota has failed to issue a recall. Given the clear safety hazards associated with this defect, I firmly believe Toyota should recall affected Highlanders and provide immediate replacements for the defective DCM module. Owners should not be forced to cover costly repairs for a known issue that compromises driver safety.

SUV has a pronounced whine coming from the transmission. This started at approximately 85,000 - 90,000 miles and has progressively gotten louder. The car currently has 96,000 miles on it. As I understand it Toyota has issues multiple technical service bulletin about this exact issue covering the 2017-2018 highlander but my 2019 is not covered even though it has the exact same 8 transmission. I have not taken this to the dealer as I understand it would not be covered under the factory power train warranty which is 5 years or 60,000 miles. I've purchased several Toyota vehicles over multiple decades, but with this issue on a vehicle that is not yet 7 years old I am a bit dissapointed and will not be purchasing any more toyota vehicles. Since this issue is specifically related to the powertrain it is most certainly a SAFETY related issue when this transmission fails.

The contact owns a 2019 Toyota Highlander. The contact stated while driving at an undisclosed speed, the vehicle made an abnormal whining sound. No warning light was illuminated. 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. No further information was available. The manufacturer was not made aware of the failure. The failure mileage was approximately 70,000. The VIN was unavailable.

The contact owns a 2019 Toyota Highlander. The contact stated that while driving at various speeds, there was a whining sound coming from the transmission while accelerating. The contact stated that over time, the whining sound became louder, and the vehicle later had transmission shifting malfunctions. The vehicle was taken to the local dealer, who diagnosed that the transmission was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not contacted. The failure mileage was 64,000.

The contact owns a 2019 Toyota Highlander. The contact stated while driving at an undisclosed speed, the contact became aware of an abnormal whining sound coming from the vehicle, and the transmission was shifting hard. No warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not yet repaired. The manufacturer was made aware of the failure, and a case was filed. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 95,000.

We have noticed a whinning noise as we accelerate the vehicle. Doing some investigation online I came across a lot of threads with the same issue. Seems to be the transmission. Reached out to a Toyota tech friend and he mentioned it is the transmission. They have had several Highlanders and Camry with the same issue.

While driving my Hybrid System Malfunction, check AWD, check engine, and Pre-Collision System Malfunction all came on simultaneously, it also said to put in P. It wouldn’t accelerate so I had to have it towed to the dealer since it had only been 3 days since I bought it. It was sent to a Toyota service center where it took 3 weeks for them to diagnose and replace the high pressure fuel pump. I got the vehicle back, it drove fine for a week until the same thing happened again. It stopped accelerating, said to shift into P-only the Hybrid System Malfunction, check engine, and Pre-Collision System Malfunction came up this time. I had it towed back to the Toyota service center since the problem clearly wasn’t solved and am awaiting a new diagnosis.

My 2019 Toyota Highlander with 56k miles has a whining noise whenever the accelerator is pressed down. The noise stops when you release the accelerator. This was confirmed by my Toyota dealership service department. They informed me the transmission needed to be replaced. They said this is a common problem with this vehicle but yet there has not been a recall. Cost of replacement is around $8000. Fortunately for me my vehicle is still under warranty. I found many similar complaints about the transmission on the Toyota Highlander Forum. I don't understand why there has not been a recall. Going forward I am concerned that the replacement transmission could very well have the same problem.

My 2019 Toyota Highlander with 56K miles has a whining noise whenever the accelerator is pressed. The noise stops when you release the gas pedal. This was confirmed by my Toyota dealership service department. The transmission does need to be replace. They said this is a common problem with this vehicle and yet there has been no recall. Fortunately my vehicle is still under warranty. I found manner similar complaints about this transmission on the Toyota Highlander Forum. I don't understand why there has not been a recall. Going forward I am also concerned that the replacement transmission could very well have the same problem.

There has been a high incidence of this model of Toyota Highlander having faulty transmissions. My vehicle had 129,000 when the transmission failed. It was metal shavings in the fluid. I’m hoping you will put pressure on Toyota to recall or help replace these transmissions. Thank you.

The SOS speaker squeals very loudly when starting the vehicle about 7 out of 10 times and is available for inspection. Problem is known by Toyota. [XXX] No. No warning indication or messages. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The CPO vehicle was purchased at 60k miles 11/5/2024. The vehicle started bogging down accelerating from a stop, while pulling into traffic, and decelerating randomly at 62k. The vehicle went in to the dealership at 64.5k on 2/20/2025 where they stated the transmission needed replacing due to a transmission whine and incorrect acceleration/deceleration. Toyota corporate will not acknowledge the dangerous problem with the UA80 transmission that 1000's of customers are having. This transmission is in many models with similar issues from 2017-2019.

[XXX] Dear staff there are other people complaining of ENGINE MISFIRE also [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

2GR engine family in general used in Toyota and Lexus, may have a MANUFACTURING defect as per google about the 2GR-FE engine subtype Yes, the Toyota 2GR-FE engine, a 3.5L V6 found in many Toyota and Lexus models, is known to have a recurring issue with head gasket leaks, particularly where coolant leaks externally from the engine block due to corrosion around the cylinder head where the coolant port is located; this is considered a common problem with this engine type. Key points about the 2GR head gasket issue: Leak location: Coolant typically leaks outside of the engine block, visible as stains on the block surface, rather than internally into the combustion chambers. Cause: Corrosion around the cylinder head near the coolant port, often exacerbated by road salt and old, acidic coolant. Prevention: Regularly changing coolant and occasionally hosing down the engine block, especially if you live in a region with heavy winter road salt. Repair: Replacing the head gasket usually requires removing the engine, making it a major repair job. So TOYOTA should be held liable for REPAIR COSTS and LABOR as well as the PAIN and SUFFERING a consumer has to go through, seeing all the drama of the TOYOTA