2017 Toyota Highlander Problems

Vehicle is a 2017 Toyota Highlander (VIN [XXX]) experiencing the UA80 8-speed transmission whine defect (T-SB-0160-18) upon acceleration. An authorized Toyota dealership test drove and officially verified the transmission failure and recommended a full replacement. However, Toyota Corporate is refusing to honor the ZJC Customer Support Program warranty extension due to an arbitrary VIN cutoff. The failing internal transmission components pose a safety risk as they can lead to harsh shifting, slipping, or a sudden loss of motive power while driving in traffic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Vehicle had history of hard shifting from 1st drive. On January 24, 2026 we heard a ringing sound as we were driving. Approximately 10 minutes after the noise began, the Check Engine light illuminated. We drove back home and connected our code reader to find P0741, P2714 and P2757. Had the vehicle towed to my Toyota Service Center and upon inspection, was informed that the transmission had failed and would require replacement. I was informed that although it was a 2017 with the UA80E manufacturered in April 2017 - it did not qualify for free replacement under Toyota. A rebuilt unit was secured and installed on 2/11/26. Toyota authorized $2000 Goodwill Assistance and their Warranty Labor Rate. I paid the remainder of the bill. The 'new' transmission also shifts hard and just doesn't feel like it it working right.

bought the car in 2018 and ever since it makes a rttling noise, Toyota says it is the hybrid system engaigeing, hybrid cars are not supposed to make noise.

The contact owns a 2017 Toyota Highlander. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer, who determined that the spark plugs needed replaced. The spark plugs were replaced by an independent mechanic, but the failure recurred. The vehicle was taken back to the independent mechanic, who retrieved diagnostic trouble codes P11F0 (Air-Fuel Ratio Imbalance) and P0305 (Misfire In Cylinder Number 5). The mechanic cleaned the fuel injectors, but the failure persisted. The contact was informed that the fuel injectors needed to be replaced. The vehicle was taken to a second dealer, Toyota of Cedar Park (5600 183A Toll Rd, Leander, TX 78641), who determined that cylinder #5 needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 151,000.

March 5th purchased a battery from Autozone Z net Fit Match that caused cascading electrical and life -safety risk while traveling from hewitt, TX to Washington DC for our families spring break trip including 4 minor children. Component: 12-Volt Battery / Electrical System / Power Steering / Service Brakes Summary: Vehicle suffered catastrophic failure of Power Steering and Braking systems while in motion due to the installation of an incompatible lead-acid battery recommended by AutoZone’s 'Z-Net' catalog. Despite Toyota Technical Service Bulletin T-TT-0523-19 (Jan 2019) stating this VIN requires an Enhanced Flooded Battery (EFB/AGM) for its Stop-Start system, the retailer’s database continues to misidentify standard batteries as compatible. This mismatch causes a voltage drop that disables critical safety modules ('Limp Mode'). I have video evidence of the catalog error. This is a systemic misrepresentation affecting 2017+ Toyota Highlander safety compliance.

Formal Complaint to NHTSA – Summary I am submitting this formal complaint regarding repeated mechanical and electrical failures involving my 2017 Toyota Highlander, purchased as a Toyota Gold-Certified vehicle with an extended Platinum Warranty. Despite strictly following Toyota’s maintenance guidelines and using only certified dealerships for all services, the vehicle has become inoperable multiple times, requiring five separate tows and resulting in repair costs exceeding $10,000. In June 2025, a Toyota dealership replaced the engine after diagnosing a warped head due to water pump failure. Following this, the vehicle began experiencing repeated charging system failures and electrical malfunctions. Multiple components—including the alternator, battery, and sensors—were replaced at another Toyota dealership based on ongoing issues, but the problems persisted. On September 2, 2025, a Toyota technician identified a missing ground wire nut as the likely root cause of these electrical failures. He confirmed the issue originated during the engine installation and that the unsecured ground caused system malfunctions. After repairs, the vehicle was again returned with a loud engine knocking noise, later traced to an improperly secured component from a prior repair. These events have raised significant concerns for the safety of myself and my family. Improper installation of major components and misdiagnosis by certified service providers have led to hazardous driving conditions, unexpected vehicle shutdowns, and unnecessary costs. I am requesting that the National Highway Traffic Safety Administration investigate this matter for potential safety defects related to improper engine installation, grounding failures, and faulty electrical diagnosis by certified Toyota service centers. Documentation, invoices, and repair records are available upon request. Thank you for your attention to this critical safety issue.

The engine stalled because the fuel pump is failing. We have found that many 2017 Toyota Highlanders have had the fuel pump recalled for this exact issue, yet our VIN is not included in this recall. We experienced the exact issue the recall was issued for stalling while driving. Issue on July 24, 2027: The engine stalled while driving on the highway at high speed and lost power steering, creating a major safety issue. We had our vehicle towed to a car care center. The car care center identified diagnostic codes related to low pressure fuel system pressure, engine stall history, etc. but cannot reproduce the issue. After checking multiple systems, he believes the issue is a failing fuel pump. Background: Over the past 6 months, we have had problems with the check engine light turning on. On multiple occasions, we have brought the car to get diagnosed and the reading has consistently been fuel pressure codes. Each time we get the car diagnosed, the technician could not reproduce the issues and cleared the codes without resolution.

Leaking fuel line due to deterioration of plastic liner in fuel line.

March 5th purchased a battery from Autozone Z net Fit Match that caused cascading electrical and life -safety risk while traveling from hewitt, TX to Washington DC for our families spring break trip including 4 minor children. Component: 12-Volt Battery / Electrical System / Power Steering / Service Brakes Summary: Vehicle suffered catastrophic failure of Power Steering and Braking systems while in motion due to the installation of an incompatible lead-acid battery recommended by AutoZone’s 'Z-Net' catalog. Despite Toyota Technical Service Bulletin T-TT-0523-19 (Jan 2019) stating this VIN requires an Enhanced Flooded Battery (EFB/AGM) for its Stop-Start system, the retailer’s database continues to misidentify standard batteries as compatible. This mismatch causes a voltage drop that disables critical safety modules ('Limp Mode'). I have video evidence of the catalog error. This is a systemic misrepresentation affecting 2017+ Toyota Highlander safety compliance.

With 22k miles on vehicle, car won’t start due to Brake power low fault. Battery was replaced in attempt to rectify problem with no success, vehicle will need to be towed in for repair.

The radar cruise control system on my 2017 Toyota Highlander is not functioning properly and creates a safety hazard. When initially setting the radar cruise control, the system works as expected. I can accelerate to a desired speed, press the “set” control, and the vehicle maintains that speed correctly. The problem occurs when I try to increase the set speed. After setting an initial speed (for example, 45 mph), I accelerate to a higher speed (such as 65 mph) and press the “set” control again to update the cruise setting. Instead of setting the new speed, the system reverts to the previously stored speed. When this happens, the vehicle rapidly decelerates and applies braking to return to the lower speed. This sudden and unexpected braking creates a dangerous situation, especially on highways, as it can put surrounding drivers at risk of a rear-end collision. I have tested this multiple times and experience the same result each time. This issue only occurs when using radar cruise control and does not occur with standard cruise control. note this has been an ongoing issue since the day I purchased my vehicle in January 2017. I notified the dealership about the issue and they stated they would open a case with Toyota

-- What component or system failed or malfunctioned, and is it available for inspection upon request? This report is regarding a premature transmission failure in our 2017 Toyota Highlander equipped with the UA80F 8-speed automatic transmission. Our highlander is currently stuck at High Tech Automotive in Wenatchee, WA 150+ miles from home after experiencing a transmission failure on the highway. -- How was your safety or the safety of others put at risk? During the transmission failure while driving on the highway the Check Engine Light came on as well as ABS light and vehicle went into a limp mode. The transmission failure and subsequent limp mode rapidly decreased our speed while traveling on the highway and forced us to limp the vehicle at low speeds across traffic putting ourselves and others traveling on the highway at risk. This vehicle has been well maintained and serviced in accordance with Toyota’s recommended maintenance schedule. Despite this, the transmission failed unexpectedly during a recent family road trip to Wenatchee, WA, leaving us stranded far from home. -- Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, the vehicle was towed to High Tech Automotive in Wenatchee WA (where it is currently stranded). The diagnostics report there confirmed proper transmission fluid level and a failed transmission with burnt transmission fluid. -- Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Not yet. A request for assistance was sent to Toyota today. -- Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There were no warning lamps, or messages. We've had the vehicle maintained and there was a whirring sound which we had inspected at Dougs Auto Tune and Repair thinking it could be the timing chain or alternator but there was no indication of transmission issues.

Driver side interior visor has failed and does not secure in place causing obstruction of view while driving.

Side mirror (glass) shakes/rattles at speeds over 45mph. This affects the visibility of things in the mirror as well as becomes distracting to the driver. When on the interstate with smooth pavement it's impossible to ignore... It's just more noticeable then. Tried moving the mirror to verify and yes, it's loose. Just reporting it now that I became aware of this website but car has had this issue for at least 2 years.

On April 5, 2026, my 2017 Toyota Highlander was involved in a side‑impact (T‑bone) collision on the front & rear passenger side. I was seated in the front passenger seat. The impact was hard enough that my insurance company declared the vehicle a total loss. During the crash, I struck my head, but no airbags deployed (front, side, or curtain). The vehicle is being released to Liberty Mutual Insurance. There were no warning lamps, messages or other symptoms of the problem prior to the failure. I am concerned that the airbag/SRS system may not have functioned properly in a crash severe enough to total the vehicle and cause a head injury to a front passenger. I am requesting that NHTSA record this incident and consider whether there may be a safety defect related to side or curtain airbag non‑deployment in this vehicle. Crash date: April 5, 2026 Approximate speed of other vehicle: [unknown] Location of impact: front passenger side (T‑bone) Result: vehicle declared total loss, head injury to front passenger, no airbag deployment.

My vehive has 122,000 miles...I recently received an airbag mafuction warning on the dash info system and to contact dealer. The dealer states this driver side airbag is now defective and needs to be replaced at a cost of $1100.00 The airbag has never been deployed. How is this noit covered under safety requirements on current vehicles? How do I know that the part was not defective when initally installed?

I have had this car seat for 1 year and 3 days and I just found out that the headrest foam piece came off the plastic base frame(06/26/2025). It has been handled with extreme care and I got it in June 2024. It has stayed in my car and the only reason I found the problem was because I was cleaning them off. It is the third Chicco car seat to have found the foam headrest either broken in half or completely separate from the plastic base in 2 months (2023 & 2024 manufacture dates). There is something wrong with this and I really hope an investigation starts so that others can avoid these issues and potential repercussions from this flaw.

I have had this car seat for 1 year and 10 months and I just found out that the headrest foam piece is split in half (06/26/2025). It has been handled with extreme care and I got it in September of 2023. It has stayed in my specific car and the only reason I found the problem was because I was cleaning them off. It is the third Chicco car seat to have found the foam headrest either broken in half or completely separate from the plastic base in 2 months (2023 & 2024 manufacture dates). There is something wrong with this and I really hope an investigation starts so that others can avoid these issues and potential repercussions from said flaw.

The paint on the hood is flaking off. There is no reason other than the paint being defective for this to happen in this manner. We just noticed it today. 11/14/25

This 2017 Highlander Blizzard Pearl White paint is defective on the drivers side door. Paint started to bubble in 2021 then peeled off with rust stains underneath due to water damage. It appears that there is no sealant on the door for the paint to adhere so it continues to peel and rust. A defective paint job on this vehicle when manufactured. Please have Toyota take responsibility for their irresponsible paint job on this door. The vehicle has never been in an accident or hit with anything on the drivers side of the door. They need to correct their incomplete and incompetent painting. There seems to be no sealant underneath for the paint to adhere to. Please address this error.

The contact owns a 2017 Toyota Highlander. The contact stated that upon entering the vehicle and attempting to buckle the seat belt, the contact became aware that the seat belt was no longer attached. No warning lights were illuminated. The vehicle was taken to the dealer, who determined that the anchor point bolts were severely corroded. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 75,000.

2017 TOYOTA HIGHLANDER. CONSUMER WRITES IN REGARDS TO DEFECTIVE SEATBELTS. THE CONSUMER STATED THE RIGHT REAR PASSENGER SIDE BUCKLE CUT THROUGH THE BELTED FABRIC. THE CONSUMER REQUESTED TO BE REIMBURSED FOR THE REPAIRS.

Toyota manufacturing issue-fuel line is manufactured incorrectly-had gas seeping into cab of vehicle and tailpipe. Severe safety issue Steering wheel/column sticks and almost lose control when driving due to a worn out coupler-poor design and manufacturing.

My car would randomly shut off at red lights, one time I was on a hill & thought I was going to roll back into the car in front of me. After restarting it would turn on. The radio would randomly shut off. We eventually replaced the battery. On a Fri.(Dec 17th) my car would not start, so my Husband drove the kids & I to school, upon my return the car started. He told me the wheel locks & I need to move it. Then on Mon. (Dec 20th) driving my daughter to preschool school…I have video from home camera showing your system will not let me attach a video) …my car stalling as I reversed out of the driveway. I loose all control, then you hear that I pulled the emergency break & stop just before two cars pass by. I then restart the car, it goes, I drive 3 houses down I pressed the break to make a left turn onto a side street, my car accelerated & smashed into a telephone pole on the drivers side. You can hear the crash on my home camera. The impact was so hard, it bent my a frame, my airbags did not deploy, my drivers side door would not open. I shifted the pole & cracked the frozen dirt ground around it as seen in the pics. I can provide a copy of the body work repairs. We paid our $1k deductible. The car jpeg image icon does is not show like the other pics attached, so I attached a screen shot as well. We have other pictures & video’s of damage to provide upon request

The contact owns a 2017 Toyota Highlander. The contact stated that upon purchasing the vehicle, there was an abnormal clicking sound coming from the front passenger’s side tire. There was no warning light illuminated. The vehicle was taken to a dealer and the contact was informed that the wheel bearings needed to be replaced. The vehicle was then taken to the dealer where it was purchased, Norm Reeves Honda Superstore Huntington Beach (19131 Beach Blvd, Huntington Beach, CA 92648), and the contact was informed that no fault was found with the vehicle. The contact stated that the vehicle stalled while attempting to make a U-turn with an unknown message on the instrument panel. Upon investigation, the contact linked the failure to NHTSA Campaign Number: 20V682000 (Fuel System, Gasoline). The vehicle was taken back to the dealer where it was purchased; however, the mechanic was unable to duplicate the failure. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 67,500.

When the vehicle was ~1.5 years old following its 10,000 mile maintenance, substantial thumping generated from the rear of the vehicle. Each time, the dealership attempted to resolve the problem finding issues with struts; however, it only went away in late March after having the vehicle in the shop for weeks at a time on 5 different occasions Nov 2018 - Mar 2019. I engaged Toyota HQ (800-331-4331) - filing report #1901092572 - requesting an exchange of the vehicle. This was denied and I was offered a 8 year warranty. *Due to COVID, I rarely drove this vehicle through 2020 and most of 2021, where to date, I have only ~34,000 miles on the vehicle. -On 21 Oct 2021, my wife was stopped at a gas station and attempted to start the vehicle. The vehicle would not start and the following lights came on without previous warning: 1)Braking Power Low, 2)Maintenance needed soon, & 3)Orange yellow triangle lit up with exclamation mark. My wife was stranded for 3 hours and the vehicle had to be towed. The dealership informed me that Toyota installed a generic battery into the vehicle (when being sold) that was only to have 4-5 years of life; however, my concern was that this vehicle had just completed maintenance and there was no warning of this upcoming issue. When repaired, I had to pay for the name brand (True Start) battery. -On 16 Jan 2022, after having driven the Highlander for 25 minutes, I started the engine while in a parking lot. While moving forward and the engine still going, the brakes and power steering went out. On the dashboard, the same lights that came on in Oct 2021, did so again. I had to let the vehicle coast (having no control) with my wife and child in the car through the parking lot. It came to a stop at the concrete parking curb stop at a store front. Toyota stated that since there was no check engine light that there was no code and they could not duplicate the problem. The vehicle was sent back to me with no resolution or explanation.

The low beams began to get dim after ~60K miles until it began to be difficult to see the right shoulder of the road. After a number of visits, the Toyota dealer said there was some kind of cloudiness on the internal surfaces of the low beam and that the only solution was to replace both headlight assemblies. By then I had also failed state inspection (because of the lights.) I paid the ~$1400 for the replacements and the lights work now. BUT, I can see inside the sealed low beam portion a few areas with a bit of cloudiness. The dealer said they could not explain and Toyota Engagement (the only way to contact the company), after I sent a long written explanation said, "contact an authorized Toyota service center. So...this is resolved but the car was not safe for a while and I have had to pay to fix a safety issue that I had nothing to do with (vehicle has mainly been garaged and not driven offroad etc).

I PURCHASED A TOYOTA HIGHLANDER IN APRIL 2017 FROM THE JIM COLEMAN DEALER IN BETHESDA, MARYLAND. SINCE THEN, THIS TERRIBLE DESIGNED CAR IS HURTING ME AND MY FAMILY. IN THE BACK OF THE CAR, THE REAR LIGHT COVERS STICK OUT ABOUT 3 INCHES, THE EDGES ARE AS SHARP AS A KEEN KNIFE (PHOTOS ATTACHED). WHEN I UNLOAD STUFF FROM THE TRUNK, IT OFTEN HURTS ME. I HAVE TRIED TO BE VERY CAREFUL. I ALSO REMINDED MY TEENAGE SON WITH CAUTION. HOWEVER, IT STICKS OUT TOO MUCH AND IS TOO SHARP. IT IS HARD TO AVOID. IT KEEPS HURTING. FOR EXAMPLE, THREE MONTHS AGO, ON AN EVENING IT WAS DARK AND RAINING, AT A COSTCO PARKING LOT, WHEN I UPLOADED GROCERIES ONTO THE CAR, MY RIGHT ARM AND JOINT WERE SUDDENLY HIT BY THIS SHARP CUTTING EDGE OF THE REAR LIGHT COVER. THE KEEN EDGE CUT MY ARM, AND THE STICK OUT PART BADLY HURT MY JOINT (PHOTOS ATTACHED). I COULD NOT RAISE MY ARM. THREE MONTHS HAVE PASSED; HOWEVER, MY JOINT IS STILL PAINING. I WENT TO JIM COLEMAN DEALER AND POINTED OUT THE DANGER PART IN THE REAR. I HAD THEIR MANAGERS AND STAFF TO FEEL BY PUTTING THEIR HANDS ON THE KEEN EDGE. THEY ALL ADMITTED IT IS BAD DESIGN AND EASY TO INJURE PEOPLE. BUT THEY SAID THEY COULD NOT DO ANYTHING ABOUT IT. I ASKED IF THEY COULD REPORT INCIDENTS/CASES TO MANUFACTURERS, AND HAVE IT IMPROVED. THEY SAID THEY SELL CARS ONLY. I RANDOMLY TOOK PHOTOS OF OTHER MADE OF CARS (PHOTOS ATTACHED). NONE OF THEM STICK OUT A KNIFE LIKES HIGHLANDER. IT IS A NIGHTMARE WHEN USING THIS HIGHLANDER DAILY. *JS

I WAS IN A REAR IMPACT COLLISION IN MY HIGHLANDER. MY VEHICLE WAS STATIONARY ON A HIGHWAY, HAVING STOPPED TO AVOID A COLLISION, AND WAS HIT FROM BEHIND AT A RELATIVELY HIGH RATE OF SPEED (ESTIMATED 55-65 MPH). MY CAR WAS PUSHED INTO THE CAR IN FRONT OF IT WHICH CAUSED A CHAIN REACTION WITH SEVERAL OTHER VEHICLES. IMMEDIATELY AFTER IMPACT I BEGAN TO FEEL NECK AND BACK PAIN AND WAS TRANSPORTED TO THE HOSPITAL. PRIOR TO TRANSPORT, WE NOTICED THAT MY HEADREST HAD BROKEN FREE IN THE IMPACT AND WAS LAYING ON THE BACK FLOORBOARD.

THE NEW HEADRESTS ARE TOO FAR FORWARD AND CREATE A LITERAL PAIN IN THE NECK. THE NEW HEADREST REQUIREMENTS ARE CAUSING THE MANUFACTURERS TO PRODUCE VEHICLES THAT THE END USERS ARE HAVING TO MODIFY, OR SET THE SEATS AT AN ANGLE THAT INCREASES THE LIKELIHOOD OF INJURY IN AN ACCIDENT. THIS IS TRUE OF MOST NEW VEHICLES. PLEASE REVISE THE NEW REGULATIONS.

Tire size 245/60R13 105N. Two weeks ago Tire Pressure Monitoring System light went on. Last week I brought it to Toyota dealer to have it patched. On 3/27/22, tire exploded. This tire is a safety hazard

TL* THE CONTACT OWNS A 2017 TOYOTA HIGHLANDER EQUIPPED WITH ACHILLES DESERT HAWK UHP TIRES, SIZE: 285/40R22 (NA). THE CONTACT NOTICED THAT THE SIDEWALLS WERE SEPARATING FROM ALL FOUR TIRES. THE CONTACT ASSOCIATED THE FAILURE WITH NHTSA CAMPAIGN NUMBER: 18T013000 (TIRES). THE CONTACT CALLED TIRE TOWN AUTO SERVICE (LOCATED AT 627 OLD SPANISH TRAIL, SLIDELL, LA 70458, (985) 643-7092) AND INFORMED THEM OF THE FAILURE. THE TIRES WERE NOT DIAGNOSED OR REPAIRED. THE TIRE MANUFACTURER WAS NOTIFIED. THE TIRE AND VEHICLE FAILURE MILEAGE WAS 20,000. *LN CONSUMER STATED PLEASE SEE ATTACHED PHOTOS OF TIRE SIDEWALL SPLITTING. I HAVE TRIED EMAILING THE COMPANY TO FIND OUT ABOUT RECALL OR TO GET A REPLACEMENT. THESE TIRES ARE DEFECTIVE AND CAN CAUSE AN ACCIDENT. *JB