Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Free volume being too low.
full bulletin at NHTSA ↗2017 Toyota Highlander electrical problems
severe 42 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
42
Recalls
0
Avg fix
$850
1crash
1fire
2injuries
What stands out
Owners have filed 42 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 4 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.
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 ↗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 ↗TT: Some 17-22MY Highlander and 17-20MY Sienna vehicles may experience a MIL ON condition with DTC(s) P042000, and/or P043000. This issue could involve deteriorated catalyst material from the bank 1 or bank 2 catalytic converter.
full bulletin at NHTSA ↗TSB: Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio (version 01013E), Entune? Audio Plus (version 010156 or 01015C), or Entune? Premium Audio (versions 010171, 010170, or 01017D) may exhibit one or more of the following conditions: ?Head unit reboots at a specific location. ?Abnormal Destination Search app operation. ?Rebooting caused by no songs on the USB-connected iPhone. ?A one-time reboot after ignition is cycled to ACC-ON. ?Audio stays muted after the key is cycled.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2017 Highlanders describe a frustrating electrical saga. The most common issue is sudden battery drain and failure to start despite the battery testing good or being recently replaced. One owner had to replace the battery at 44,000 miles after less than three years. Jump starts become routine, and some owners report needing them multiple times within a week.
The vehicle also stalls randomly—at stop lights, on the highway, during acceleration—and warning lights (check engine, AWD, braking power low) flood the dash without clear cause. Dealers cannot reproduce these failures. One transmission failure resulted in replacement, and the transmission shop noted he'd seen at least three identical 2017 Highlanders with the same problem in recent months. A serious case revealed a missing ground wire nut left after engine repair, which cascaded into multiple electrical failures until the dealer finally found it.
The auto start/stop feature appears problematic, triggering unwanted shutdowns at traffic lights. Audio systems malfunction, radio rebooting or shutting off before the vehicle stalls. One owner reported a charging port overheating and melting while driving. Ignition coils fail repeatedly—one owner replaced three in one year. Throughout, owners struggle with dealer diagnostics that find nothing, often leaving them with hundreds or thousands in repair costs and no solution.
Same Toyota Highlander electrical reports on nearby years: 2014 · 2015 · 2016 · 2018 · 2019
Failure modes owners describe
Battery drain and start failures
Rapid battery depletion causing inability to start engine, often with 'braking power low' warnings despite battery testing good or recently replaced. Occurs repeatedly within weeks or months. Some owners report needing jump starts multiple times in a week; one replaced battery at 2 years 11 months (44k miles) for ~$450.
When: Throughout ownership; some cases within first 5-10 months; one at 44k miles after 2 yrs 11 months
Symptoms owners cite: Vehicle will not start or requires jump start; Rapid clicking when pressing start button; Electrical panel lights dim or do not illuminate; 'Braking power low / stop in safe place' warning appears; 'Charging system malfunction' message; Battery tests good despite repeated failures; Alternator tests good despite drain
Codes mentioned: Braking power low fault, Charging system malfunction, Low braking power warning
Repairs/costs cited: Battery replacement $150–$450; jump starts; AAA battery replacement under warranty; one owner reports misdiagnosis by dealer initially pointing to bad computer before identifying battery issue; ground wire nut found missing after engine installation in one case, traced to electrical system failures
Recalls/TSBs owners mention: No recalls mentioned for 2017 model; 2020 model has electrical recall per owner research; Toyota certified dealer misdiagnosis in multiple cases; one owner notes Toyota customer support program 23TE01 (fuel pump pressure issue suspected)
Sudden loss of power and stalling while driving
Engine shuts off abruptly at stop lights, during acceleration, or on highway without warning. Warning lights illuminate (check engine, AWD, power loss). Car sometimes restarts immediately after key cycle; sometimes takes minutes or requires jump start. Occurs randomly and cannot be reproduced by dealers.
When: Throughout ownership; occurs at variable mileage from 23k to 44k miles
Symptoms owners cite: Engine stalls at stop light or during traffic; Sudden power loss on highway or acceleration; Check engine light illuminates; Check AWD / AWD failure alert; Engine power loss warning; Master warning light; Radio shuts off or reboots before stall; Vehicle lurches or jerks; No steering power after stall (loss of power steering); Unable to shift gears
Codes mentioned: Check engine, Check AWD, AWD failure alert, Engine power loss, Master warning light, SBS Airbag System Malfunction
Repairs/costs cited: Cannot be reproduced by dealers; diagnostic testing finds no failure; software update attempted in one case without resolution; dealer diagnostic unable to identify root cause in multiple cases; transmission replacement performed in one case (transmission company suspicious of pattern with same make/model)
Recalls/TSBs owners mention: Toyota manufacturer inspection stated unable to duplicate failure; no final report completed in one case; software update applied without success; no recalls identified in narratives for 2017 model on this issue
Electrical system malfunctions and ground wire issues
Multiple electrical failures traced in one case to missing ground wire nut after engine installation. Owners report repeated component failures (alternator, battery, sensors) and charging system errors despite components testing good. One dealer identified unsecured ground as root cause of cascading electrical failures.
When: Post-engine replacement repair; affecting multiple systems throughout ownership
Symptoms owners cite: Repeated alternator and battery failures despite replacement; Charging system malfunction warnings; Multiple sensor lights illuminating; Electrical diagnosis impossible despite multiple visits; Components fail after recent dealer repair
Codes mentioned: Charging system malfunction
Repairs/costs cited: Engine replaced due to warped head from water pump failure; missing ground wire nut discovered during reinstall; ground wire replacement performed; improperly secured component from prior repair caused engine knock; alternator replacement, battery replacement, sensor replacement performed
Recalls/TSBs owners mention: Toyota dealership replaced engine and later identified missing ground nut as root cause; repair records and invoices available; owner requesting NHTSA investigation for potential safety defect related to improper engine installation and grounding failures by certified service providers
Transmission jerking and power delivery issues
Transmission shifts violently, jerks, lurches, or fails to respond smoothly. In one case, transmission became unsalvageable and required replacement at high cost. Owners report delayed reactions followed by sudden acceleration, shifts into wrong gears, or inability to shift.
When: Throughout ownership; one case at low mileage in mountains
Symptoms owners cite: Violent gear shifts; Lurching and jerking during acceleration; Delayed throttle response followed by violent acceleration; Unable to shift gears or gears stuck; Vehicle lunges forward uncontrollably; Transmission enters multiple gears violently (park, reverse, drive in sequence); Check engine light illuminates with transmission failure
Codes mentioned: Check engine
Repairs/costs cited: One transmission replacement cost not specified; transmission company noted seeing pattern of same make/model/color with transmission failure in recent months
Recalls/TSBs owners mention: No recalls or service bulletins mentioned for transmission issues
Check engine light and sensor fault codes with no root cause identified
Check engine, AWD, and other fault lights illuminate repeatedly, sometimes clearing on their own or after dealer 'fixes.' Diagnostics reveal old codes or no codes. Owners report light cycles on and off without pattern. One owner notes 'throwing a bunch of old codes.'
When: Within 6 months of used purchase and throughout ownership
Symptoms owners cite: Check engine light illuminates without pattern; AWD check light; Exclamation mark warning light; 'Go to dealership' message; Lights come on and go off without clear trigger; Lights clear after dealer visit but return within days or weeks
Codes mentioned: Check engine (multiple old codes), AWD fault codes, Multiple sensor codes reported as 'old codes'
Repairs/costs cited: $250 diagnostic fee at dealership; $800 in recommended maintenance at dealership not covered by warranty; fuel system flush performed elsewhere; lights cleared temporarily then returned; mechanic unable to reproduce or diagnose
Recalls/TSBs owners mention: No recalls mentioned; dealership unable to identify root cause
Auto start/stop feature causing stalling and electrical drain
Automatic idle-stop feature triggers unwanted engine shutdown at traffic lights and causes repeated battery drain. Feature disables when AWD system engages. One owner notes battery drain persists even when feature manually disabled.
When: At traffic lights and idle; recurring over 1.5+ years
Symptoms owners cite: Engine stalls at stop light when auto start/stop engages; Complete loss of electrical power (no lights); Cannot shift gears when stalled; Battery depleted repeatedly; Auto feature triggers shutdown at inappropriate times
Repairs/costs cited: Owner manually disables auto start/stop feature to prevent battery drain, but drain continues
Recalls/TSBs owners mention: TSB 0148-19 mentioned for 2017 model in one narrative (engine computer reprogramming and coil replacement), but owner notes their vehicle does not show this TSB; recall exists for 2020 model with same issue per owner research
Ignition coil misfires and engine rough operation
Engine misfires during acceleration causing rough idle and loss of power. Ignition coils replaced multiple times (three replacements in one year) with recurrence of same symptom. Known Toyota service bulletin TSB 0148-19 addresses this, but some 2017 owners report not covered.
When: During highway acceleration; repeat failures within one year
Symptoms owners cite: Engine misfire during acceleration; Rough engine operation; Loss of power/deceleration required; Repeat failures after coil replacement
Codes mentioned: Check engine (ignition coil fault implied)
Repairs/costs cited: Ignition coil replaced three times in one year; TSB 0148-19 covers engine computer reprogramming and coil replacement for some 2017 models but not all
Recalls/TSBs owners mention: TSB 0148-19 (engine reprogramming and coil replacement) exists but not applied to all 2017 Highlander engine types; not a formal recall
Random electrical noise and mysterious sounds
Vehicle emits loud, intermittent buzzing or alarm-like sound with unusual pitch when parked and powered off. Sound does not match horn or panic alert. Continues when engine is started. Causes concern about short circuit. Sound stops intermittently then recurs.
When: Vehicle parked in driveway; occurs Saturday evening and again next day
Symptoms owners cite: Loud buzzing/alarm sound with unusual pitch when parked and off; Sound continues when vehicle is turned on; Sound stops spontaneously then recurs 20 minutes later; No warning lights on dashboard; Battery tests good
Repairs/costs cited: No diagnosis performed; dealership closed when incident reported; owner suspects electrical short
Recalls/TSBs owners mention: No manufacturer response documented
Charging port overheating and melting
USB/charging port at middle armrest overheated, melted to floor, and produced smoke while driving. Port has functional cap to prevent debris entry. No debris found in port at time of incident.
When: While driving, 13 miles from home
Symptoms owners cite: Smoke coming from charging port at middle armrest; Heat felt from port; Port melted to floor
Repairs/costs cited: No repair note provided
Recalls/TSBs owners mention: No manufacturer response documented
Radio intermittent operation and audio fluctuation
Radio randomly shuts off, reboots, or fluctuates between bass/treble settings without user input. Occurs repeatedly over ownership despite dealer visits. One owner replaced battery three times with vehicle still having only 25k miles but issue persists.
When: Throughout ownership; consistent issue; one case with 25k miles
Symptoms owners cite: Radio shuts off or reboots randomly; Audio fluctuates between bass/treble without input; Radio goes off before vehicle stalls (warning sign in some cases); Recurring after multiple dealer service visits
Repairs/costs cited: Dealer visited 4 times; no resolution achieved; battery replaced 3 times (unrelated to radio but indicates broader electrical issues)
Recalls/TSBs owners mention: Toyota states no problems exist; issue unresolved despite multiple service attempts
Hands-free calling system with excessive echo
Hands-free calling feature has severe echo making calls unusable while driving. Issue existed since new vehicle purchase. Forces driver to use handheld phone, violating California law requiring hands-free operation.
When: Since new vehicle purchase; persistent
Symptoms owners cite: Excessive echo on incoming hands-free calls; Hands-free feature unusable while driving
Recalls/TSBs owners mention: Issue reported as ongoing problem with Toyota 2019 and older models; owners pursuing lemon law option
Power liftgate malfunction
Power liftgate fails to close. Part of broader electrical failure pattern with multiple components malfunctioning simultaneously.
When: During ongoing electrical issues
Symptoms owners cite: Power liftgate does not close
Moonroof random opening and closing
Moonroof opens and closes randomly without user input. Occurs as part of broader electrical malfunction pattern alongside violent lurching and shifting.
When: During periods of electrical malfunction and transmission issues
Symptoms owners cite: Moonroof opens and closes randomly
Recalls/TSBs owners mention: No resolution found; dealer unable to replicate problem
Fuel pump pressure fault and no-start condition
Vehicle refuses to start with 'braking power low' error message and suspected fuel pump pressure issue. Customer support program 23TE01 referenced. Owner hopes issue becomes recall.
When: Recurring within 4-month period
Symptoms owners cite: Vehicle will not start; 'Braking power low / stop in safe place' error message; Error message contains information not in owner's manual
Repairs/costs cited: Issue documented under customer support program 23TE01; owner has paperwork
Recalls/TSBs owners mention: Customer support program 23TE01 in place (fuel pump pressure issue suspected)
Engine knock and improperly secured components post-repair
Loud engine knocking noise appears after dealer repairs. Traced to improperly secured component from prior repair during engine installation.
When: After engine replacement and repair
Symptoms owners cite: Loud engine knocking noise
Repairs/costs cited: Component found improperly secured from prior repair; requires re-securing
Recalls/TSBs owners mention: Toyota dealership identified and repaired; issue related to service quality
Water in spark plugs and fuel system issues
Water discovered on spark plugs after vehicle fails to start post-refueling. Spark plugs replaced but issue recurs within days with all warning lights returning.
When: After refueling; recurring within days of spark plug replacement
Symptoms owners cite: Vehicle will not start after refueling; Water on spark plugs; Weak starting (takes minutes); All warning lights return within days of repair; Rough running/engine missing sound
Codes mentioned: Check engine, AWD warning, Exclamation light
Repairs/costs cited: Spark plugs replaced; no lasting resolution
Recalls/TSBs owners mention: No manufacturer action documented
Purge valve faults and rough idle with misfires
Vehicle shakes heavily when stopped with misfires while braking. Mechanic reports seeing many 2017 Highlanders with faulty purge valves.
When: At idle/stopped
Symptoms owners cite: Heavy shaking when stopped; Misfires while braking
Repairs/costs cited: Mechanic notes pattern of purge valve failure across 2017 Highlander population
Throttle looseness and transmission failure
Throttle becomes loose without explanation despite regular maintenance. Transmission subsequently fails. Accelerator does not engage properly while driving; vehicle appears reluctant to accelerate.
When: Out of nowhere despite regular maintenance
Symptoms owners cite: Loose throttle with no apparent cause; Transmission not working; Vehicle stops during acceleration; Does not accelerate properly while driving
Repairs/costs cited: Mechanic cannot explain throttle looseness
Synthesized from 42 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
2017 TOYOTA HIGHLANDER VIN: [XXX] I purchased my Highlander new in 2017 and I have had consistent electrical issues. The radio has consistently fluctuated between bass, treble, and off for no apparent reason. I have taken my vehicle to the dealer 4 times and still no change. I have replaced the battery 3 times although I only have 25,000 miles on 55,000mile tires, the tire treads are wearing…
I purchased my Highlander new in 2017 and I have had consistent electrical issues. I the radio has consistently fluctuated between bass, treble, and off for no apparent reason. I have taken my vehicle to the dealer 4 times and still no change. I have replaced the battery 3 times although I only have 25,000 miles on 55,000mile tires, the tire treads are wearing quickly. I rarely go anywhere and…
Had electrical trouble with your 2017 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 2017 Toyota Highlander?
It's a meaningful issue. 42 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Across the 13 complaints that reported odometer mileage, most electrical failures cluster between 25,000 and 41,000 miles, with the median around 36,000. A quarter of owners report trouble before 25,000; a quarter make it past 41,000. 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/2017/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.