The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.
full bulletin at NHTSA ↗2024 Toyota Grand Highlander electrical problems
moderate 16 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
16
Recalls
0
Avg fix
$850
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Some 2024 – 2025 model year Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a condition where the Blind Spot Monitor (BSM) system is inoperative, there is a BSM malfunction message on the multi-information display (MID), or the driving assist information indicator is illuminated, along with one or more of the following Diagnostic Trouble Codes (DTCs) present: •C1AB413 – Outer Mirror Indicator (Module "B" Side) Circuit Open •C1AB513 – Outer Mirror Indicator (Module "A" Side) Circuit Open The BSM sensor software has been updated to reduce the possibility of these conditions.
full bulletin at NHTSA ↗Some 2024 – 2025 model year Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a condition where the Blind Spot Monitor (BSM) system is inoperative, there is a BSM malfunction message on the multi-information display (MID), or the driving assist information indicator is illuminated, along with one or more of the following Diagnostic Trouble Codes (DTCs) present: •C1AB413 – Outer Mirror Indicator (Module "B" Side) Circuit Open •C1AB513 – Outer Mirror Indicator (Module "A" Side) Circuit Open The BSM sensor software has been updated to reduce the possibility of these conditions.
full bulletin at NHTSA ↗To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.
full bulletin at NHTSA ↗To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2024 Grand Highlander's electrical and control systems are generating widespread owner complaints centered on three critical areas: powertrain control, instrument visibility, and infotainment function.
Transmission power loss is the most serious recurring issue. Multiple owners report the vehicle suddenly loses power or enters limp mode after stopping at traffic lights or other low-speed situations. No warning lights appear before or during these episodes. The vehicle shudders, sputters, and produces loud groaning and banging noises before regaining control after approximately 5 seconds. One owner discovered a transmission failure code logged two weeks before taking delivery of the new vehicle, raising questions about pre-sale quality control. Toyota issued a service bulletin in March 2025 addressing TCM software, but at least one owner reports power-loss incidents continued after the update was installed.
Instrument cluster failures are also documented across multiple vehicles. The instrument panel goes completely dark, leaving drivers unable to see speed, fuel level, or warning lights. At least two owners report vehicles out of service for months while awaiting parts under recall 25TA08. The Panoramic View Monitor System and Parking Assist ECU (recall 25V744) have also been unavailable for repair, with vehicles stuck in dealerships for 80+ days.
Infotainment screens blackout intermittently or completely while driving, cutting off access to navigation, phone functions, and radio. A few owners report blind spot monitoring failures and third-row seat mechanisms jamming after folding. Digital key systems have failed to unlock or start vehicles, and one fuel gauge reads empty with 5+ gallons still in the tank.
Failure modes owners describe
Transmission Control Module (TCM) Loss of Power / Limp Mode
Vehicle loses power or enters limp mode after coming to a complete stop and attempting to accelerate. Occurs when hybrid battery is at 33% charge or less. No warning lights appear. Vehicle shudders, sputters, lunges, and produces loud groaning noises followed by two loud bangs and violent forward lurches before regaining power. One owner reports transmission failure code was logged two weeks before vehicle delivery with only 6 miles on it. TCM flash update (service bulletin March 2025) was installed on at least one vehicle but power-loss episodes continued afterward.
When: After complete stop; hybrid battery state affects frequency. One code dated pre-delivery; recurring incidents over 1.5 years of ownership.
Symptoms owners cite: Loss of power and inability to accelerate; Vehicle enters limp mode; Shuddering and sputtering on acceleration from stop; Loud groaning noises followed by bangs; Violent forward lunges; No warning lights displayed
Codes mentioned: Transmission failure codes (multiple, unspecified), Lack of acceleration code, Sluggish acceleration code
Repairs/costs cited: TCM flash/update installed (service bulletin March 2025); failure recurred in at least one case after repair attempt.
Recalls/TSBs owners mention: Service bulletin March 2025 for TCM flash reset/update to address sluggish acceleration, loss of power, and limp mode when hybrid battery is at 33% or less.
Panoramic View Monitor System / Parking Assist ECU Failure
Safety recall 25TA13 and 25TB13 (NHTSA 25V744) involves Panoramic View Monitor System and Parking Assist ECU. Vehicle declared unsafe to operate by dealer. Three repair attempts with two separate replacement components installed failed to resolve the issue. Third required component on backorder with no definitive ETA. Recall repair remains incomplete after 80+ days in service.
When: Backorder status as of March 2026; vehicle out of service since December 23, 2025.
Symptoms owners cite: Parking Assist ECU malfunction; Panoramic View Monitor System inoperative
Codes mentioned: NHTSA 25V744
Repairs/costs cited: Two replacement components installed without resolution; third component on backorder with no ETA.
Recalls/TSBs owners mention: Recalls 25TA13 and 25TB13 (NHTSA 25V744) issued; parts unavailable. Previous recall 25TA08 (NHTSA 25V595) showing as incomplete in vehicle record despite reported completion on October 14, 2025.
Instrument Cluster / Combination Meter Complete Failure
Instrument cluster fails completely, displaying no information. Owner unable to view speed or system warnings. Related to recall 25TA08 (NHTSA 25V595). At least one vehicle out of service for approximately three months with no repair completion and no clear timeline provided. Dealership awaiting instructions from Toyota Corporate.
When: At 96,150 miles in one case; failures reported at ~90,000 miles in another. Out of service since October 7, 2025 in one case.
Symptoms owners cite: Complete instrument panel failure; Unable to display critical information; Speed not visible; System warnings not displayed; No warning lights illuminated despite failure
Codes mentioned: NHTSA 25V595
Repairs/costs cited: Parts not available for recall repair as of reporting.
Recalls/TSBs owners mention: Recall 25TA08 (NHTSA 25V595) issued for electrical system; recall parts unavailable, preventing repair completion.
Infotainment Screen Display Blackout
Infotainment system screen turns black intermittently or completely, preventing access to safety features, radio, phone connectivity, maps, and other functions. Failures occur while driving. Screen may display only turn-by-turn directions without visual map. In some cases, center information screen shows visual map that disappears, leaving only text navigation. Unrelated to instrument cluster recall.
When: At ~40,000 miles in one case; recurring at ~1,000 miles in another; intermittent throughout ownership for multiple owners.
Symptoms owners cite: Infotainment screen turns black intermittently; Screen goes completely black with no radio, phone, or maps function; Visual map disappears leaving only turn-by-turn text; Center USB charger function status unknown; chargers adjacent to infotainment malfunction
Codes mentioned: Unknown warning light illuminated (at least one case)
Repairs/costs cited: Dealer repair attempted and resolved temporarily in at least one case; failure recurred. Some owners restart vehicle to restore display.
Digital Key / Phone Key System Failure
Phone registered as digital key fails to unlock vehicle door or start engine. Owner left with only phone as key after chip shortage limited FOB availability. Phone would not unlock car after exiting store despite multiple troubleshooting attempts including Toyota support. Wife unlocked remotely via satellite but vehicle would not start until unlocked with physical FOB. Poses safety risk if failure occurs in remote area without cell service.
When: Occurred at undisclosed mileage; single incident reported but indicates systemic vulnerability.
Symptoms owners cite: Phone-based key does not unlock door; Phone-based key does not start vehicle; Vehicle unresponsive to phone key after troubleshooting
Repairs/costs cited: Unable to resolve via Toyota support; physical FOB required to start vehicle.
Recalls/TSBs owners mention: 20-minute support call with Toyota could not resolve; remote unlock via satellite performed by wife.
Key Fob Power Loss and Vehicle Lock-Out
Key fob loses power causing key fob to become undetected inside vehicle. Owner unable to lock or start vehicle. Beeping sound heard from vehicle. Vehicle completely inoperable until power restored to fob.
When: At approximately 7,000 miles.
Symptoms owners cite: Key fob loses power; Key fob undetected by vehicle; Unable to lock vehicle; Unable to start vehicle; Beeping sound from vehicle
Repairs/costs cited: Not diagnosed or repaired by owner; status unknown.
Radio / Audio System Volume Control Failure
Radio volume control fails intermittently, becoming stuck at minimum level. Owner can turn volume all the way up and change stations (FM, Sirius) with no audio output. Only remedy is complete vehicle shutdown for several seconds, followed by restart. Issue reoccurs and is problematic on long drives where vehicle shutdown is unsafe or inconvenient.
When: Intermittent; reoccurs throughout ownership.
Symptoms owners cite: Volume control unresponsive; No audio output despite maximum volume setting; Station changes do not produce audio; FM and Sirius feeds unaffected by volume controls
Repairs/costs cited: Workaround: turn off vehicle completely for few seconds, then restart.
Blind Spot Monitoring System Malfunction
Side-view mirror blind spot warning lights fail to function as designed. System may display false error messages. Resolved by dealer in at least one case but underlying reliability unclear.
When: At approximately 40,000 miles in one case; recurring in another.
Symptoms owners cite: Blind spot warning lights not functioning; False blind spot error messages displayed
Repairs/costs cited: Dealer repair attempted; one case resolved.
Third-Row Seat Stuck in Folded Position
Third-row driver's side seat becomes stuck after being folded and fails to unfold. Unknown part has detached inside seat mechanism. Dealer determined cause and repaired vehicle, but failure recurred.
When: At approximately 1,000 miles; recurring.
Symptoms owners cite: Third-row driver's side seat stuck in folded position; Seat will not unfold; Unknown internal part detachment
Repairs/costs cited: Unknown part reattached by dealer; failure recurred.
Fuel Gauge Inaccuracy
Fuel gauge does not accurately indicate fuel tank level. When gauge reads completely empty, tank requires approximately 12 gallons to refill. Manual states tank capacity is 17.2 gallons, indicating gauge reads empty when tank still contains 5+ gallons.
When: Ongoing throughout ownership.
Symptoms owners cite: Fuel gauge displays empty when tank contains fuel; Actual fuel capacity discrepancy
Windshield Spontaneous Cracking
Multiple cracks appear in windshield without impact. First crack approximately 5 inches long appears at driver's side top where windshield meets frame. Second crack approximately 5 inches long appears at center bottom of windshield. Both cracks expanding. Owner reports no rock or road debris strike. Dealer attributed cracks to debris kicked up by other vehicles, but owner disputes this explanation given lack of impact evidence.
When: At approximately 40,000 miles; both cracks actively expanding at time of report.
Symptoms owners cite: Crack at driver's side top of windshield; Crack at center bottom of windshield; Both cracks approximately 5 inches long; Cracks expanding
Repairs/costs cited: Dealer attributed to debris; vehicle not repaired.
Airbag Recall Non-Completion
Recall 24TA09 for airbag defect issued but not completed after approximately one year. Vehicle safety compromised as airbags may not deploy. Owner reports sudden safety failures and blind spot error messages while driving. No clear timeline for repair completion.
When: Recall outstanding for approximately one year as of report date.
Symptoms owners cite: Airbag defect present; Airbags may not deploy in collision; Sudden safety system failures during driving
Codes mentioned: NHTSA 24TA09
Recalls/TSBs owners mention: Recall 24TA09 issued but not completed; no ETA provided.
Synthesized from 16 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
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…
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…
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…
Had electrical trouble with your 2024 Toyota Grand Highlander?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2024 Toyota Grand Highlander?
It's a documented issue but not catastrophic. 16 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 16 complaints filed, electrical issues most often appear around 34,500 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2024/Toyota/Grand Highlander.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.