2024 Toyota Grand Highlander Electrical Problems

While driving my 2024 Toyota Grand Highlander Hybrid AWD at highway speed with only 16,755 miles on the vehicle, multiple warning messages suddenly appeared, including warnings related to the engine, hybrid system, AWD system, and other vehicle functions. The vehicle instructed me to pull over immediately and significantly reduced power output, making it difficult to maintain highway speed and safely maneuver through traffic. I was able to reach the shoulder and had the vehicle towed to a Toyota dealership. The dealer diagnosed a punctured radiator caused by a rock or similar road debris that allegedly passed through the front grille and struck the radiator. The dealer confirmed that coolant loss from the puncture triggered the vehicle's protective reduced-power mode. This failure created a significant safety risk. A sudden loss of power while traveling at highway speed increases the risk of rear-end collisions and other accidents, particularly in heavy traffic where drivers may not expect a vehicle to rapidly decelerate. There were no warning lights, messages, leaks, drivability concerns, or other symptoms before the incident. All warnings appeared suddenly at the time of failure. Toyota has declined warranty coverage, classifying the damage as a road hazard. However, I believe this may indicate a design defect. I have identified numerous reports from other GH owners describing nearly identical failures involving rocks penetrating the radiator through the front grille, often at relatively low mileage. These reports suggest the radiator may be inadequately protected from ordinary roadway debris. My concern is not simply radiator damage, but that a small piece of road debris encountered during normal driving can disable a critical component and cause the vehicle to enter a severe reduced-power mode at highway speed. I request that NHTSA investigate whether the front grille and radiator protection design of the Grand Highlander creates an unreasonable safety risk

NHTSA ID

11746510

Incident

Jun 24, 2026

While traveling at highway speed on I-75 northbound, the vehicle experienced a complete and total loss of electrical power. and propulsion. The following conditions were present simultaneously: - Complete loss of propulsion - Inability to shift transmission to neutral — vehicle could not be moved out of the active traffic lane - Complete loss of hazard lights — no ability to warn approaching traffic - Vehicle remained stranded in active highway traffic for approximately 15 minutes - Electrical power spontaneously restored after approximately 15 minutes - Vehicle was then driven off the interstate under its own power That was a life-threatening event. My wife and I could have been struck from behind by highway traffic with no warning lights, no ability to move the vehicle, and no way to signal distress. DEALER VISIT 1 — SATURDAY, APRIL 26, 2026 Dealer: Sarasota Toyota, Sarasota, Florida Complaint presented: Complete electrical shutdown on I-75 the previous day as described above Action taken by dealer: Performed recall repair for black screen issue Outcome: Vehicle returned to customer same day Post-repair symptom: Low voltage warning appeared on drive home from Sarasota Toyota Saturday afternoon Note: Dealer did not perform full electrical diagnostic. Dealer did not flag battery failure. Dealer did not retain vehicle for further investigation despite being informed of complete highway electrical shutdown the previous day. DEALER VISIT 2 — MONDAY, APRIL 28, 2026 Dealer: Germain Toyota of Naples, Naples, Florida Complaint presented: Complete electrical failure on I-75, low voltage warning after Sarasota repair, battery failure Findings: Battery confirmed dead. Alternator confirmed functioning normally. Dealer assessment: Condition described as unusual. Case escalated to Toyota Field Technical Specialist. Current status: Vehicle retained at Germain Toyota of Naples. Rental vehicle provided to customer.

NHTSA ID

11734470

Incident

Apr 24, 2026

This is regarding recalls for my 2024 Toyota Grand Highlander Hybrid Platinum Max. The vehicle has been in the possession of Koons Tysons Toyota since December 23, 2025 (80 days as of 3/11/26), for repair of Safety Recall #25TA13 and #25TB13 NHTSA 25V744) involving the Panoramic View Monitor System/Parking Assist ECU. The dealership has explicitly informed me that the vehicle is unsafe to operate and have therefore kept it. Toyota and its authorized dealer have made three (3) repair attempts to correct this safety defect. Two separate replacement components were ordered and installed without resolving the issue. A third required component is currently on backorder with no definitive ETA or repair completion date, as the date keeps getting pushed. We are not being updated and are not receiving information from the dealership and Corporate about the details about the problem and nature of the delay. Toyota has obligations under federal recall law administered by the National Highway Traffic Safety Administration (NHTSA) to remedy safety defects within a reasonable time and at no charge to the consumer. An indefinite inability to complete a safety recall repair due to parts unavailability raises serious concerns under those obligations. Furthermore, a previous recall #25TA08 (NHTSA 25V595) which was supposedly completed on October 14, 2025 by the same dealership is showing as INCOMPLETE in the vehicle record with NHTSA.

NHTSA ID

11723563

Incident

Dec 23, 2025

The contact owns a 2024 Toyota Grand Highlander. The contact received notification of NHTSA Campaign Number: 25V595000 (Electrical System), and the vehicle was taken to the dealer on several occasions, but the dealer informed the contact that the part to do the recall repair was not yet available. The contact stated that the instrument panel had failed. Additionally, the contact stated that the vehicle was not driving properly, and the vehicle was shuddering while exceeding 70 MPH. The vehicle was taken to the dealer, where it was diagnosed with an axle leak, and the contact was informed that there was no warning light illuminated for the failure due to the instrument panel failure. The axle leak was repaired; however, the failure persisted. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the failure, and a case was filed; however, no assistance was provided. The failure mileage was approximately 9,000.

NHTSA ID

11719872

Incident

Aug 24, 2024

Mileage

9,000 mi

In the middle where the car chargers are – the one in the center isn’t working but the one to the right is. When doing maps, the visual map disappeared and just showed where to turn – happened about 2-3 time. Today the entire screen went black – no radio, phone, maps, nothing. No way to operate it at all. This is unrelated to the current recall that addresses the speedometer / display right behind the steering wheel.

NHTSA ID

11714183

Incident

Jan 26, 2026

The contact owns a 2024 Toyota Grand Highlander. The contact received notification of NHTSA Campaign Number: 25V595000 (Electrical System); however, the part to do the recall repair was not yet available. The contact stated that while driving at various speeds, the instrument panel failed to show critical information as intended. No warning light was illuminated. The vehicle was taken to a local dealer, where it was diagnosed and determined that the failure was recall-related; however, the parts were not available for the recall repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 90,000.

NHTSA ID

11709659

Incident

Sep 15, 2024

Mileage

90,000 mi

My vehicle has been out of service since October 7, 2025 due to a complete failure of the instrument cluster (combination meter). This issue is related to SAFETY RECALL 25TA08. The instrument panel is fully non-functional, making the vehicle unsafe and inoperable. The vehicle has been at Toyota dealership for approximately three months, with no repair completed and no clear timeline provided. The dealership stated they are awaiting instructions from Toyota Corporate and cannot proceed independently.

NHTSA ID

11708716

Incident

Sep 28, 2025

I am filing a complaint regarding a safety recall on my Toyota vehicle. Toyota issued the recall notice on September 11, 2025, but as of today there is still no available remedy. Due to this recall, my vehicle has been deemed unsafe and undriveable and has been out of service since October 8, 2025. While a rental vehicle has been provided, I have been without my own car for several months with no clear timeline or resolution. I am concerned about the extended delay in providing a recall remedy for a safety-related defect and the lack of transparency regarding next steps. I am requesting that NHTSA review Toyota’s handling of this recall, including the prolonged lack of a remedy and the impact on vehicle owners. I believe this delay is unreasonable and warrants further oversight.

NHTSA ID

11705092

Incident

Oct 8, 2025

The contact owns a 2024 Toyota Grand Highlander. The contact stated that upon starting the vehicle and reversing, there was an abnormal banging sound coming from the vehicle. While attempting to reverse, the vehicle failed to move, but the vehicle was restarted and operated as designed. While driving, there was an abnormally loud clanking sound coming from the vehicle with the “WRENCH SYMBOL” displayed. There were other unknown warning lights illuminated. The vehicle was taken to the local dealer, who was unable to duplicate the failure. The vehicle was not diagnosed or repaired. The contact stated that the vehicle would be taken back to the local dealer for additional diagnostic testing. The manufacturer was not contacted. The failure mileage was approximately 18,000.

NHTSA ID

11699123

Incident

Nov 13, 2024

Mileage

18,000 mi

center infoscreen blacked out while driving on 2 occasions weeks apart. screen rebooted after restarting car each time.

NHTSA ID

11694215

Incident

Jun 15, 2025

fuel guage does not accurately indicate the amount of fuel in the tank. when guage showing completely empty the car takes about 12 gallons to fill, tank capacity shown in manual is 17.2 gallons.

NHTSA ID

11694213

Incident

Apr 30, 2024

Vehicle Safety Complaint — 2024 Toyota Grand Highlander My 2024 Toyota Grand Highlander has experienced multiple serious defects, including two official recalls: • 25TA08 — instrument cluster failure • 24TA09 — airbag defect This week, the instrument display failed completely, making it impossible to view speed or system warnings. I’ve been unable to work since then, causing financial hardship for my family. Earlier, I also had to replace the entire drive shaft at my own expense (~$2,500), which is highly unusual for a new vehicle. These repeated issues raise serious concerns about safety and reliability. I’ve submitted a formal complaint to Toyota Brand Engagement Center, and it has been acknowledged and assigned to a Case Manager. The dealer is still searching for a suitable loaner vehicle that meets my work requirements. Given the severity and recurrence of these defects, I request that NHTSA investigate this pattern and consider whether the vehicle qualifies for buyback or replacement under applicable consumer protection standards. • VIN: [XXX] • Mileage: 96150 miles INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11691128

Incident

Sep 28, 2025

The contact owns a 2024 Toyota Grand Highlander. The contact stated that there was a small crack on the windshield on the driver's side at the top where the windshield meets the frame. The contact stated that the crack had started to expand. The contact recently noticed another crack in the center of the windshield, starting at the bottom. The contact stated that both cracks were approximately 5 inches long and expanding. The contact had not struck a rock or road debris for the windshield to crack. The contact had taken the vehicle to a dealer to be diagnosed and was advised by the dealer that the cracks were the result of small stones being kicked up by other vehicles. The vehicle was not repaired. Additionally, the contact had been experiencing failures of the infotainment screen going black, and the side-view mirror Blind Spot warning lights not functioning as designed. The vehicle had been taken to the same dealer several times, and the dealer resolved the issue. The contact stated that the infotainment screen failure had reoccurred. The manufacturer was not informed of the failure. The failure mileage was approximately 40,000.

NHTSA ID

11685012

Incident

Aug 2, 2025

Mileage

40,000 mi

Over 1.5 years of owning my new 2024 grand Highlander platinum hybrid pro max I have had multiple incidents (6 documented now with toyota) where after coming to a complete stop I go to accelerate and the car shutters,sputters,lunges, and even looses power or goes into “limp mode”. I have been almost hit several times now by oncoming traffic because my grand Highlander completely loses power. It will not accelerate. After 5 seconds I typically hear loud groaning noises followed by two loud bangs and two violent lurches forward before my car finally regains power. No warning lights popped up on my dash any of the times my car has lost power. My dealership keeps telling me “no problem found” and that I am the only one with this issue. This is false. There are many complaints online and finally after I did not give up the dealership pulled a comprehensive RoB scan/report on my car and found multiple transmission failure codes on the transmission system/TCM. One “lack of acceleration code” was even dated two weeks before I bought my brand new grand Highlander with toyota. I received my grand Highlander with 6 miles on it. I was the first owner. My PDI “pre-delivery inspection date was one week after this transmission failure code”. When I presented this to toyota reps who finally met with me at the dealership they had nothing to say. Toyota knows about this problem and they do not know how to fix it. It is a serious safety issue and I refuse to allow someone to get hurt because Toyota will not be honest and relay this known issue. After the dealership and toyota reps told me I was the only one with this issue toyota officially released a service bulletin in March 2025 for a TCM flash reset/update to address sluggish acceleration, loss of power, and limp mode with the transmissions TCM when the hybrid systems battery is at 33% or less. My dealership installed the TCM update about 1.5 months ago and unfortunately my car has had two more instances since with loss of power.

NHTSA ID

11670662

Incident

Nov 15, 2024

The contact owns a 2024 Toyota Grand Highlander. The contact was unable to fill the fuel tank completely. The contact stated that the fuel tank had a 17-gallon capacity; however, the contact was only able to get more than 10 gallons into the tank. Additionally, the contact stated that the Auto START/STOP feature was not functioning as needed. The contact had taken the vehicle to a local dealer, who was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was 16,455.

NHTSA ID

11649434

Incident

Dec 20, 2024

Mileage

16,455 mi

The vehicle airbag is not fixed yet it is almost on year now. Either had to fix or issue new car. even the price come down now lost money due to bad name. when driving suddenly the safety fails and shows error the blind spot. And there is another recall also electrical one they ask us to come fix. How come a car be safe if airbags do not deploy you have to force them fix it please one year is too much it is safety concern.

NHTSA ID

11623584

Incident

Nov 5, 2024

The contact owns a 2024 Toyota Grand Highlander. The contact stated that the infotainment system screen display turned black intermittently, preventing the contact from accessing the safety features as needed. An unknown warning light was illuminated. The contact also stated that the third-row driver's side seat was stuck after being folded and failed to unfold as needed. The vehicle was taken to the dealer, where it was determined that an unknown part had detached. The dealer repaired the vehicle; however, the failure recurred. Additionally, the contact received notification of NHTSA Campaign Number: 24V461000 (Air Bags); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The failure mileage was approximately 1,000. VIN tool confirms parts not available.

NHTSA ID

11618952

Incident

Nov 9, 2023

Mileage

1,000 mi

I have had 2 intermittent issues since I bought this vehicle brand new. 1) Hard, Jerky shifting from 1-2 or 2-3 gear 2) Huge safety issue regarding loss of power and inability to accelerate from a stop even though the car is on and in drive. This has happened to me multiple times and is very intermittent so it is hard to replicate. This has happened when I am attempted to accelerate from a complete stop and the car begins to move but then does not accelerate at all. Almost as if the powertrain shut off even though it was moving under its own power a fraction of a second ago. This has happened to me multiple times with my entire family in the car as we attempted to enter intersections leaving the car powerless with oncoming traffic. Thankfully we were not hit by another car but could have been.

NHTSA ID

11613041

Incident

Sep 20, 2023

The contact owns a 2024 Toyota Grand Highlander. The contact stated that while the vehicle was parked, it was discovered that the key fob lost power causing the key fob to become undetected inside the vehicle. The contact was not able to lock or start the vehicle due to the failure. In addition, there was a beeping sound coming from the vehicle. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 7,000.

NHTSA ID

11610985

Incident

Aug 26, 2024

Mileage

7,000 mi

There are two documented events, Jun 28 and Jul 02, but several others have been observed While moving forward -Exiting a private drive, from a stopped position -Turning right to merge into a traffic lane -The vehicle failed to accelerate rolling forward into traffic at idle speed only -There was no response from the vehicle when the accelerator peddle was depressed or re-depressed -Vehicle had to be “coasted” to the right shoulder out of the way of oncoming traffic After traffic passed -While still on the road shoulder and the vehicle still running -It was a minute or two before the vehicle started to respond to throttle -When it did started to respond, it was laggy for about 30 seconds -Response remained laggy until the speed passed 20 mph and it started to respond as normal There were no vehicles or obstructions within range that should have triggered a vehicle control response There were no instrumentation or gauge cluster warnings indicating obstructions

NHTSA ID

11600288

Incident

Jul 2, 2024

Sometimes the radio lose volume all the way. You could turn the volume all the way up , change stations, FM, Sirius and nothing happens. The only way that this issue goes away and you can go back and start listening is to turn off completely the vehicle, leave if off, for a few secs, then power on . turn on the vehicle. This is very annoying since if you are driving for a long period of time, you cannot turn off the vehicle to do this trick. I hope this 3.0 Toyota Multimedia works better and more reliable.

NHTSA ID

11585432

Incident

Mar 14, 2024

Toyota provides the ability to use a phone for a key. Only one key was provided due to chip shortages. My phone has been registered as a key. I left my home with only my phone. Upon coming out of the store my phone would not open the door after trying numerous fixes including calling Toyota. My wife unlocked the car remotely via satellite. Trying for 20 minutes with Toyota we could not get the vehicle to recognize my phone. My wife had to drive the only set of keys to my location. The vehicle still wouldn't start until I unlocked the vehicle with the FOB. Had this issue occured in a remote area without cell service I would have been locked out of my vehicle with no way to call for help.

NHTSA ID

11555916

Incident

Nov 19, 2023

The vehicle main screen on the dash will not go past the “get started” screen without accepting Toyotas privacy agreement on their app. I cannot use the screen as it defaults to this screen each time the car starts and does not allow a menu to the feature I paid for. This is both a safety and privacy issue as I should be able to use the vehicle while not agreeing to the privacy policy and I should be able to access the screen without distraction from driving. I explained to the salesmen I did not agree with the privacy policy and have been able to navigate the vehicle without issue in my 2014 and 2021 Highlander. I contacted Toyota and there is not work around. The manufacturer will not provide a solution other than removing all my safety features, which did allow me to get past the Home Screen. I asked to return the vehicle because I cannot use it and was refused. I would like to be able to protect my privacy and be able to use the screen I paid for without offering access to cameras and other location and audio recording devises on the vehicle.

NHTSA ID

11540890

Incident

Aug 23, 2023