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full bulletin at NHTSA ↗2007 Toyota Yaris electrical problems
severe 15 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
15
Recalls
0
Avg fix
$850
5fires
What stands out
Of the 6 model years of Toyota Yaris we track for electrical problems, this one carries the most owner complaints on file — 15.
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.
TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections have been updated. October 30, 2017 Rev1: ? Applicability has been updated to include 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0012-13. Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated
full bulletin at NHTSA ↗TSB: REVISION NOTICE November 22, 2017 Rev1: ? Applicability has been updated to include 2014 ? 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. In the event that a Toyota vehicle becomes submerged in water, many components may be physically damaged. Electrical and electronic components, including wiring harnesses, are particularly susceptible to corrosion and subsequent malfunction. Although any flooding can be damaging, salt water flooding elevates the potential for abnormal conditions and may increase risks due to its highly corrosive and conductive nature. Salt residue also continues to corrode and remain conductive even after a vehicle dries.
full bulletin at NHTSA ↗TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0101-11. Applicability has been updated to include 2016 ? 2017 model year vehicles. Service Bulletin No. T-SB-0101-11 is Obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many lubricants, cleaners, and automotive chemicals contain silicone or other compounds that may contaminate electrical contacts, and therefore increase electrical resistance and decrease switch perfor
full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE: September 14, 2016: This bulletin is now obsolete. Please see T-SB-0134-16.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners describe two broad electrical categories that'll affect your daily driving and safety. On the critical end: multiple reports of electrical fires in the engine bay, power switches, and door wiring—some occurring at low mileage (under 10,000 miles), others at highway speeds. One vehicle burned at two separate locations simultaneously; another caught fire with no warning lights. A driving school operator saw the power switch burn on multiple Yaris units and had to disconnect power to prevent spreading flames.
On the drivability side, owners report electronic throttle control cutting out mid-acceleration, especially around curves or during merges. One driver nearly collided when the car refused to go faster than 40 mph on a highway while the speedometer needle froze. After hub work, one owner's ABS lights stuck on permanently despite replacing wiring harnesses. Spiral cable failures trigger airbag warnings at 75K miles ($530 repair, common enough that owners found multiple complaints online). A/C drains clog yearly, shorting the blower motor. Door locks and horns fail electrically. One Yaris stalled without warning at 70 mph.
Same Toyota Yaris electrical reports on nearby years: 2008 · 2009
Failure modes owners describe
Electrical fires in wiring and power switch
Multiple owners report fires igniting in engine bay wiring, driver-side door wiring, and power window switches. One vehicle caught fire at two separate locations (airbag area and driver-side lateral center). A driving school owner saw burn marks and fire on the power switch mounted near foam material. One vehicle's electrical wires on the firewall burned while driving at highway speed, destroying the vehicle. Another fire occurred in door panel wiring at 70,000 miles.
When: One vehicle with less than 10,000 miles; another at approximately 70,000 miles; instances occurring while driving at various speeds (25 mph, 70 mph, highway)
Symptoms owners cite: Fire in engine bay; Orange glow under hood; Smoke from driver-side window; Burn marks on power switch; All wires melted in door panel; No warning indicators before fire; Burn smell from power switch
Repairs/costs cited: Power switch replacement ($200 mentioned); door panel wiring replacement; one vehicle destroyed by fire
Recalls/TSBs owners mention: Manufacturer notified; stated investigation would be conducted; insurance expert determined factory defect
Electronic throttle control and acceleration sensor malfunction
Owners report loss of acceleration control, car will not accelerate past 40 mph even with pedal fully pressed. One owner describes plastic accelerator sensor assembly losing electrical contact around corners, uphill, or from dead stops, causing car to become sluggish then suddenly accelerate. Speedometer needle stuck during these events. One incident nearly caused a collision during highway lane change.
When: Highway driving; attempting to merge at 50-60 mph; various speed ranges (25 mph to 70 mph in other instances)
Symptoms owners cite: No acceleration past 40 mph; Speedometer needle stuck; Engine noise similar to overheating or fan belt; Vibration during acceleration failure; Car jolts then seems fine after drifting; Poor acceleration around corners; Sluggish performance from dead stop
Repairs/costs cited: $215.95 repair mentioned for accelerator sensor assembly; dealership unable to diagnose the problem in at least one case
ABS and brake warning lights staying on continuously
After rear wheel hub replacement and ABS sensor reattachment, ABS light and emergency brake light remained illuminated on dashboard and would not turn off. Owner had three ABS relay sensor warning faults diagnosed (front right and both rear wheels). Replaced all three wiring harnesses but lights stayed on. Battery reset attempted without success.
When: After hub replacement in May 2015; lights remained on continuously from that point
Symptoms owners cite: ABS and emergency brake lights on continuously; Lights do not turn off on startup; Loss of ABS function; Persistent dashboard warning lights despite repairs
Codes mentioned: ABS relay sensor warning faults - front right wheel, ABS relay sensor warning faults - both rear wheels
Repairs/costs cited: Replaced all three wiring harnesses for affected wheels; attempted internal computer reset by disconnecting battery
Spiral cable failure causing airbag warning light
Multiple owners report airbag warning light illumination, diagnosed as failure of the spiral cable (steering column connector). Owners note this appears to be a common issue affecting many Toyotas based on internet searches. At least one owner was charged $530 for parts and labor to replace the failed component.
When: At approximately 75,000 miles in one case; mileage not stated in another
Symptoms owners cite: Airbag warning light on; Light stays on continuously
Repairs/costs cited: $530 for spiral cable parts and labor; only dealership could diagnose
A/C condenser drain clogging and blower motor failure
Water drain for air conditioning condenser clogs regularly, allowing water to accumulate in the unit and overflow onto the blower motor and blower housing, causing electrical short circuits. Results in blown fuses and blower motor failure requiring replacement. Mold buildup occurs in carpeting due to moisture.
When: Recurring every summer since purchase; multiple instances over vehicle ownership
Symptoms owners cite: Water overflow onto blower motor; Blown fuses; Blower motor failure; Mold buildup in carpeting; Health hazard from mold
Repairs/costs cited: Blower motor replacement; fuse replacement; multiple repairs needed
Alternator corrosion
Alternator developed corrosion requiring replacement. Manufacturer did not inform consumers of this potential defect.
Symptoms owners cite: Alternator corrosion
Repairs/costs cited: Alternator replacement required
Door lock electrical failures
Driver-side door lock developed electrical problem preventing use of key to lock the door; door could only be locked from inside. Subsequently, hatchback door lock also failed and could not be opened with key, rendering hatchback door unusable.
Symptoms owners cite: Key does not lock driver-side door; Key does not open hatchback door; Door locks inoperative
Horn electrical failure
Vehicle horn became inoperative. Dealer attributed failure to electrical failure.
When: At 45,000 miles
Symptoms owners cite: Horn inoperative
Repairs/costs cited: Vehicle not repaired
Unexpected stalling at highway speed
Vehicle stalled without warning while driving at 70 mph.
When: At approximately 215,000 miles
Symptoms owners cite: Stalling without warning at highway speed
Repairs/costs cited: Vehicle not diagnosed or repaired
Seat belt warning light malfunction
Seat belt warning light flashes continuously and does not stop.
Symptoms owners cite: Seat belt light flashes continuously
Synthesized from 15 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had electrical trouble with your 2007 Toyota Yaris?
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 2007 Toyota Yaris?
It's a meaningful issue. 15 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 11 complaints that reported odometer mileage, most electrical failures cluster between 45,000 and 107,500 miles, with the median around 80,000. A quarter of owners report trouble before 45,000; a quarter make it past 107,500. 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/2007/Toyota/Yaris.
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.