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full bulletin at NHTSA ↗2006 Toyota Highlander electrical problems
moderate 21 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
21
Recalls
0
Avg fix
$850
When does it fail?
Of the 21 electrical complaints filed for the 2006 Toyota Highlander, here's the actual mileage breakdown — failures cluster heaviest at 125,000-150,000 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
No new NHTSA electrical complaint has been filed on this vehicle in over 14 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full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.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
Owners of 2006 Highlanders describe a pattern of critical electrical failures that emerge across the vehicle's lifespan. The most dangerous issue is hybrid inverter failure—vehicles lose all power suddenly while driving at 55–70 mph, with warning lights flooding the dash seconds before shutdown. Replacement costs run $9,000–$10,000 if out of warranty; Toyota's recall (Campaign 11V342000) lacked available parts when issued.
ABS actuators fail by losing pressure, triggering VSC warnings. One owner reports the same part failed twice—once under a 2016 recall, then again without coverage—after dealers ignored a chronic whirring sound on multiple service visits.
Power windows stick in the down position repeatedly, a safety hazard for emergency egress. Owners paid hundreds in repairs; Toyota's 2012 recall covered 2007–2009 models but excluded 2006s despite identical complaints filed earlier.
Battery drain, stalling at 5-minute intervals, and accelerator lag (1–2 second delay before engine engages, causing lurching) round out the electrical chaos. One owner's vehicle stalled 6 times and required 3 battery replacements; the dealer found an internal short but couldn't stop the problem.
Owners repeatedly report Toyota claiming no complaints existed, then discovering widespread forum posts and recalls affecting the same model. Multiple incidents occurred when vehicles were relatively young (3–5 months old).
Same Toyota Highlander electrical reports on nearby years: 2005 · 2007 · 2008 · 2009
Failure modes owners describe
Hybrid Inverter Failure
The hybrid inverter assembly fails suddenly while driving, causing complete loss of power and vehicle shutdown. Occurs across a range of mileages and without prior warning. Multiple owners report all warning lights illuminating moments before stall. Repair costs quoted between $9,000–$10,000 if out of warranty. Some owners also report inverter issues as part of electrical recall (Campaign 11V342000) with delayed or unavailable parts.
When: Mileage ranges from 29,500 to 136,000 miles; incidents reported across multiple years of ownership
Symptoms owners cite: Complete loss of power while driving; Vehicle stalls at highway speeds (55–70 mph); All warning lights illuminate on dash; Vehicle will not restart; Check Hybrid System warning appears; Power steering stops working
Codes mentioned: Check Hybrid System, VSC (Vehicle Stability Control) warning
Repairs/costs cited: Inverter replacement $9,000–$10,000; one owner had warranty coverage; others denied manufacturer assistance or faced parts unavailability
Recalls/TSBs owners mention: NHTSA Campaign 11V342000 (Electrical System recall); parts were not available when recall was issued; no assistance offered to out-of-warranty owners
ABS Actuator Pressure Loss / Failure
ABS actuator loses pressure and fails, triggering VSC warning light and requiring replacement. One owner reports the same actuator was replaced under recall in 2016 but failed again. Associated with a chronic whirring sound that dealers missed on multiple service visits. Replacement cost approximately $2,700 (including ~$2,000 parts).
When: At least one failure noted after previous 2016 recall repair; owner notes whirring sound was present throughout ownership
Symptoms owners cite: VSC (Vehicle Stability Control) warning light illuminates; All check lights on dashboard light up; Chronic whirring sound from ABS actuator; ABS system loses pressure
Codes mentioned: VSC warning
Repairs/costs cited: $2,700 estimated repair cost (~$2,000 for parts); same part had been replaced under recall in 2016
Recalls/TSBs owners mention: Previous recall repair in 2016; no warranty coverage for repeat failure; owner was not informed of actuator noise as defect during earlier service visits
Power Window Switch Failure / Sticking
Passenger and rear windows fail intermittently, sticking in the down position or becoming inoperable. Multiple owners report paying hundreds of dollars in repairs. One owner notes a 2012 recall for 2007–2009 models was announced after they complained to Toyota, suggesting 2006 models may have been excluded despite similar defects. Windows can be stuck halfway or fully down, creating a safety concern for emergency egress.
When: Issues ongoing since 2012 and persisting through vehicle ownership; one complaint notes windows stuck at 88,000 miles
Symptoms owners cite: Passenger window stopped working; Rear windows stuck in down position; Front driver window hesitates to work; Window rattling while partially or fully down; Windows inoperable despite multiple repairs
Repairs/costs cited: Owners paid hundreds of dollars in repairs; dealers found costs too expensive to fix all windows; some owners disconnected power to stuck windows to prevent further failure
Recalls/TSBs owners mention: Toyota issued recall for power switch (sticky switches) in 2007–2009 models in October 2012, but 2006 models were not included despite similar complaints. Owner reported contacting Toyota on 08/28/2012 and being told of no complaints; recall announced 2 months later.
Electrical System Battery Drain / Internal Short
Vehicle experiences chronic electrical drain causing repeated battery depletion and stalling. One owner reports the vehicle stalled 6 times and required 3 battery replacements. Dealer found an internal short by the engine and replaced a theft deterrent switch, but the stalling problem persisted. Another owner reports the car going dead for no reason.
When: Recurring issue; one owner reports stalling began when car was 3–5 months old and has continued
Symptoms owners cite: Vehicle stalls unexpectedly; Battery drains repeatedly; Vehicle will not restart after short shutdown periods (5 minutes); Requires battery jump start
Codes mentioned: SHIFT TO PARK error code (even when already in Park)
Repairs/costs cited: Battery replaced 3 times; internal short found by engine; theft deterrent switch replaced; dealer unable to fully resolve stalling problem
Accelerator Lag / Hesitation on Engagement
Engine exhibits a 1–2 second delay between accelerator input and engine response, causing sudden lurch forward. Occurs both when initially accelerating from a stop and when resuming acceleration after releasing the pedal. Owner reports learning to expect and compensate for the condition but notes it creates a safety risk.
When: Complaint filed 02/04/2010; condition ongoing
Symptoms owners cite: 1–2 second pause between accelerator input and engine engagement; Sudden lurch forward after pause; Hesitation occurs when resuming acceleration at low speeds; Hesitation occurs after initial stop
Computer Control Module / ECU Failure
Instrument panel warning lights remain illuminated and vehicle will not start. One owner reports the computer core needed replacement; another reports the inverter assembly was replaced to address illuminated instrument panel lights. These cases suggest potential ECU or hybrid control module malfunction.
When: Failure mileage approximately 90,000 miles (at least one case)
Symptoms owners cite: Brake light, antilock brake light, and check engine light illuminate; Vehicle will not accelerate; Antilock brakes do not function; Instrument panel lights remain illuminated; Vehicle will not start
Codes mentioned: Check Engine, ABS light, Brake light
Repairs/costs cited: Computer core replacement diagnosed in one case; vehicle not repaired in at least one instance
Accessory Failures (Visors, Remote Lock)
Multiple electrical accessories fail, including sun visors that do not stay in up position and door lock remote fobs that become inoperable. Owner notes these are additional safety hazards.
When: At 88,000 miles and ongoing
Symptoms owners cite: Sun visor does not stay in up position; Door lock fob (driver side) quit working
Synthesized from 21 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Tl* the contact owns a 2006 Toyota highlander hybrid. The contact stated that the lights on the instrument panel remained illuminated and the contact was unable to start the vehicle. The vehicle was towed to the dealer but not repaired. The failure and the current mileage was not available. Updated 02/09/12*lj the dealer replaced the inverter assembly. Updated 02/29/12
Tl*the contact owns a 2006 Toyota highlander hybrid. The contact stated that while driving approximately 55 MPH the vehicle completely stalled and coasted until it stopped. The vehicle was towed to a dealer who inspected the vehicle and informed the contact that there was an inverter failure. The vehicle was not repaired. The failure mileage was approximately 130,000. Updated 02/08/11*lj…
Had electrical trouble with your 2006 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 2006 Toyota Highlander?
It's a documented issue but not catastrophic. 21 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 16 complaints that reported odometer mileage, most electrical failures cluster between 42,000 and 145,000 miles, with the median around 100,000. A quarter of owners report trouble before 42,000; a quarter make it past 145,000. 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/2006/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.