TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system.
full bulletin at NHTSA ↗2012 Toyota Highlander electrical problems
moderate Owners of the 2012 Toyota Highlander have filed 28 NHTSA complaints about the electrical, typically surfacing around 48,151 miles at roughly $850 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See electrical across all vehicles →
Failure mileage
Complaints
28
Recalls
0
Avg fix
$850
| Model year | electrical complaints |
|---|---|
| 2008 Highlander | 38 |
| 2009 Highlander | 19 |
| 2010 Highlander | 52 |
| 2011 Highlander | 19 |
| 2012 Highlander (this page) | 28 |
| 2013 Highlander | 22 |
| 2014 Highlander | 32 |
| 2015 Highlander | 45 |
| 2016 Highlander | 14 |
When does it fail?
Of the 28 electrical complaints filed for the 2012 Toyota Highlander, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 28 electrical complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA electrical complaint has been filed on this vehicle in over 13 years — the issue may be aging out of the active population.
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.
TT: Some customers may encounter Bluetooth® connectivity concerns such as: ?Difficulty to pair the phone. ?Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ?Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as ability to change the track using the steering wheel controls. These concerns can be caused by changes made on the customer?s phone. Make sure to inquire with the customer if the connectivity concerns occurred after receiving an operating system update on their phone, or if they have restored their phone data/settings recently.
full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2012 Highlander's electrical system shows a consistent pattern of actuator failures across multiple systems. Power door lock actuators are the dominant complaint—owners report locks failing to engage or disengage via key fob or manual controls starting around 30,000–50,000 miles, almost always after the 36,000-mile warranty expires. Multiple owners state all four doors have failed simultaneously or in quick succession, with dealership repairs running $500–$600 per door. Several owners confirm dealers acknowledge seeing this problem repeatedly.
Power tailgate motors fail with similar timing, starting intermittently before stopping altogether. Toyota has issued a service bulletin for this issue but denies warranty coverage despite multiple class-action lawsuits.
Other significant failures include a hybrid system shutdown at 65,000 miles (no restart, dealership unable to diagnose after 6+ hours), an ignition switch wire disconnection triggered by tilt-steering adjustment (causing engine shutdown while parked), and brake actuator/booster failure in a hybrid at 70,000 miles. Window motors have also failed. Less common reports include headlights staying on intermittently, defroster malfunction, and an engine shutoff when the defroster button is pressed.
One owner's mechanical key couldn't unlock the vehicle when both the fob and car batteries were dead—the fob battery is required even for mechanical unlock.
Costs for repairs outside warranty range from $500 to over $3,000, with owners questioning why they bear the expense for what appears to be systematic design or manufacturing defects.
Same Toyota Highlander electrical reports on nearby years: 2010 · 2011 · 2013 · 2014 · 2015
Failure modes owners describe
Power Door Lock Actuator Failure
Door lock actuators fail to lock and/or unlock via key fob or manual door controls. Failures occur intermittently at first, then completely. Multiple doors can fail—some owners report all four doors affected. Failures begin around 30,000–50,000 miles, often right as warranty expires (36,000 miles).
When: 30,000–50,000 miles; typically near or after 36,000-mile warranty expiration
Symptoms owners cite: Door will not lock or unlock via key fob remote; Door will not lock or unlock via driver-side door controls; Intermittent failure of one or more doors before total failure; Child cannot exit locked rear passenger door; Doors fail to lock when transmission shifted to Park; Doors fail to unlock when transmission shifted to Park or unlock button pressed
Repairs/costs cited: Dealership replacement of actuators: $500–$600 per door; total repair costs reported as $900–$2,000 for multiple doors. Owner reports dealership states they 'see this all the time.'
Power Tailgate Motor Failure
Power tailgate fails to open and close. Failures begin intermittently before stopping altogether. Toyota issues a service bulletin but denies warranty coverage and refuses to repair under recall despite multiple class-action lawsuits.
When: Around 2–4 years of ownership; described as occurring after warranty expiration
Symptoms owners cite: Tailgate will not close or opens intermittently; Tailgate stops working completely
Repairs/costs cited: Dealership diagnoses as broken motor; repair cost borne by owner (out of warranty).
Recalls/TSBs owners mention: Toyota Service Bulletin exists on this issue for 2012 models; however, Toyota refuses warranty coverage despite multiple class-action lawsuits filed.
Ignition Switch Disconnection—Tilt-Steering Column
Adjusting the tilt-steering column causes ignition switch wire to detach or break, resulting in engine shutdown. Owner could not restart vehicle and lost steering and braking power while parked; incident occurred on first-ever column adjustment.
When: 1 year of ownership; incident at approximately 1,000 miles (vehicle purchased 1 year prior)
Symptoms owners cite: Engine shuts off immediately when tilt-steering column is adjusted; Engine will not restart; Loss of steering and braking power
Repairs/costs cited: Vehicle required towing to dealership. Cause: ignition switch wire detached or broken due to tilt action.
Hybrid System Failure (Power Loss)
Hybrid powertrain shuts down suddenly after normal startup and warm-up, with warning message indicating hybrid system problem. Vehicle will not restart. Dealership unable to diagnose after 6+ hours of troubleshooting by hybrid expert; suspected inverter issue.
When: 65,000 miles; occurred after normal 5-minute warm-up
Symptoms owners cite: Car shuts down after 12 feet of driving; Car will not restart; Warning message: 'Hybrid System Problem' displayed
Repairs/costs cited: Dealership unable to determine cause; suspected inverter component. May not be covered under extended warranty.
Recalls/TSBs owners mention: Owner references recalls 13V396000 (2006–2010 Highlanders) and 14V053000 (2010–2014 Prius) as potentially similar issues.
SRS Airbag System Malfunction
Passenger seat sensor malfunction triggers 'Check SRS Airbag System' warning. Dealership attempts repair three times in three weeks, but warning reappears within a day each time. Toyota has issued a recall (13V014000) for seats and front airbag on 2012 Highlanders, but owner's VIN is not included.
When: July 2021
Symptoms owners cite: Warning message: 'Check SRS Airbag System. Have your vehicle checked by dealer immediately'; Passenger seat sensor malfunction
Repairs/costs cited: Dealership repair attempted three times in three weeks; failure persists.
Recalls/TSBs owners mention: Toyota recall 13V014000 (Campaign, Report Date Jan 16 2013) covers seats and front airbag on 2012 Highlanders, but owner's VIN excluded.
Brake Actuator and Booster Assembly Failure (Hybrid)
Brake actuator and booster assembly fails in hybrid models, affecting braking system functionality. Owner states this is a widespread issue on Toyota hybrids and describes it as inevitable ('not a matter of if, but when'). This is the owner's second hybrid with this failure.
When: 70,000 miles
Symptoms owners cite: Brake actuator and booster assembly failure; Reduced or compromised braking system functionality
Repairs/costs cited: Replacement cost over $3,000 at dealership and independent hybrid repair shops.
Power Window Motor/Regulator Failure
Front driver-side window makes clicking noise as if coming off track; arm motor eventually stops working completely. Front passenger-side window now making the same noise. Owner fears opening it.
When: Not specified in complaint
Symptoms owners cite: Window makes clicking noise as if coming off track; Arm motor stops working; Window will not move
Repairs/costs cited: Owner replaced arm on driver's side.
Headlights Staying On Intermittently
Headlights will not shut off intermittently when powering off vehicle. Occurs at low mileage. Dealership found no failures during diagnostic testing and vehicle not included in any recalls.
When: 1,000–3,300 miles
Symptoms owners cite: Headlights will not shut off when vehicle powered off; Intermittent occurrence
Repairs/costs cited: Dealership diagnostic found no failures; vehicle not repaired.
Recalls/TSBs owners mention: Not included in any recalls.
Rear Window Defroster Malfunction
Rear window defroster does not function properly, causing windows to remain foggy for extended periods.
When: 1,000–3,300 miles
Symptoms owners cite: Defroster does not function properly; Windows remain foggy for long periods
Recalls/TSBs owners mention: Not included in any recalls.
Speedometer Inaccuracy
Speedometer consistently displays 3 miles per hour higher than actual vehicle speed, as verified against highway speed monitors and GPS indicators. Toyota dealer and headquarters state speedometer is within performance specification.
When: Not specified
Symptoms owners cite: Speedometer reads 3 mph higher than actual speed
Recalls/TSBs owners mention: Toyota states speedometer is within performance specification.
Power Tailgate Opens on Its Own
Trunk/tailgate opens spontaneously without user input, even when owner is away from vehicle.
When: Not specified
Symptoms owners cite: Trunk/tailgate opens on its own; Can occur while owner is in house or away from vehicle
Engine Shutdown When Defroster Activated
Engine shuts off while driving when defroster button is turned on.
When: Not specified
Symptoms owners cite: Engine shuts off while driving; Triggered by activating defroster button
Mechanical Key Lock Requires Battery Power
The mechanical key built into the key fob cannot unlock the vehicle without battery power in the fob, even when the vehicle battery is dead. This prevents owner access to vehicle when both fob and vehicle batteries are depleted.
When: Vehicle had dead battery
Symptoms owners cite: Cannot unlock vehicle with mechanical key when fob battery is dead; Cannot unlock vehicle with key fob when vehicle battery is dead
Power Lift Gate Bar Detachment
Power lift gate support bar detached from door. Mechanic indicates new tailgate is needed.
When: Not specified
Symptoms owners cite: Powerlift gate bar came off from door
Repairs/costs cited: Mechanic indicates new tailgate required.
Synthesized from 28 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
Tl* the contact owns a 2012 Toyota highlander. The contact stated that while driving approximately 35 MPH and steering to the right, the engine suddenly emitted an abnormal noise. The contact also stated that the headlights would not shut off intermittently when powering off the vehicle. In addition, the defroster for the rear window would not function properly, causing the windows to remain…
This is the second Highlander Hybrid I've owned that has had the brake actuator and booster assembly fail affecting the functionality of the car's braking system. Replacing these two parts has an absurd price of over 3k at the dealership and other independent hybrid repair shops. My car only has 70k miles on it and I've read this issue applies to almost all other Toyota Hybrids. If most hybrid's…
The front driver window was making a clicking noise as if it were coming off the track. Eventually, the arm motor stopped all together and I had to replace the arm. Now the front passenger window is making the same noise and I'm afraid to open it. The leather interior is cracking badly on all seats. I rarely have passengers and condition the leather. I've had to use an adhesive to prevent…
2012 TOYOTA HIGHLANDER was locked & battery was dead. Could not unlock using either the key fob or the mechanical key in the fob. Was told even the mechanical key requires battery power.
Had electrical trouble with your 2012 Toyota 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 2012 Toyota Highlander?
It's a documented issue but not catastrophic. 28 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?
Across the 17 complaints that reported odometer mileage, most electrical failures cluster between 17,400 and 86,000 miles, with the median around 48,151. A quarter of owners report trouble before 17,400; a quarter make it past 86,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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/2012/Toyota/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.