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 ↗2006 Toyota Tacoma electrical problems
severe 20 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
20
Recalls
0
Avg fix
$850
2crashes
3fires
When does it fail?
Of the 20 electrical complaints filed for the 2006 Toyota Tacoma, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 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.
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 Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded.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
The 2006 Tacoma electrical system has multiple serious failure modes. Unintended engine acceleration is the most dangerous: engine suddenly revs to high RPM with the driver's foot off the pedal, the accelerator feels stuck, and the engine won't shut down with key-off. This happens at traffic lights, while coasting, or in park, forcing drivers to brake hard to regain control. Some incidents caused property damage collisions. Dealers cannot reproduce the problem.
Spiral cable breaks disabling airbags, horn, and cruise control are common—owners cite this as well-known in Tacoma forums. Costs run $460–$603 per replacement, and failures recur even after warranty repair. Check engine lights stay on due to electrical board faults, but Toyota's recall process requires customers to pay upfront ($300–$400) and seek reimbursement later.
Wiring fires are documented: trailer short circuits exposed an undersized fuse (30 amps on #12 wire instead of the proper 20-amp maximum), melting wiring looms and destroying the entire electrical system ($4,800 repair bill). A blower resistor overheats and corrodes, fire hazard per owners. In one case, a cigarette lighter popped out and ignited the interior at 4,000 miles. One low-mileage truck had a neutral safety switch wiring fire. Temperature-dependent signal failures above 85 degrees also reported, plus stalling events that prevent restart for 10 minutes.
Same Toyota Tacoma electrical reports on nearby years: 2005 · 2007 · 2008 · 2009
Failure modes owners describe
Unintended Engine Acceleration (Throttle Surge)
Engine suddenly revs to high RPM without driver input, foot off accelerator has no effect, key-off sometimes required to stop it. Happens at traffic lights, while coasting, in park, or while shifting. Vehicle becomes extremely difficult to control; some owners had to brake hard to stop or collide with objects. First incident reported at 800 miles on a new truck.
When: From 800 miles on new vehicles; recurring incidents within short timeframes; one incident caused property damage collision
Symptoms owners cite: Engine races to high RPM without throttle pedal depression; Accelerator pedal unresponsive or stuck; Engine does not shut down with key-off initially; Gear selector locks in Drive despite attempts to shift to Neutral; Loss of vehicle control until key-off cycle or engine restart; Throttle sticks after depression of accelerator pedal
Codes mentioned: Speed control electrical system fault, Throttle control malfunction
Repairs/costs cited: Dealers reportedly unable to reproduce or diagnose problem. One case involved electronic system inspection.
Recalls/TSBs owners mention: Case# 200701040167 issued but manufacturer stated unable to duplicate failure. No recall or TSB cited by owners.
Spiral Cable / Steering Wheel Contact Assembly Failure
Spiral cable breaks or develops electrical faults, disabling airbag system, horn, cruise control, and steering wheel audio controls. Airbag warning light illuminates. Cable shorts or circuit faults can recur even after dealer repair under warranty. Owners report costs of $460–$603 for replacement, plus diagnostic fees ($88–$94.95). Multiple owners note this is a common problem in 06 Tacoma forums.
When: At 14,685 miles, 48,000 miles, 105,000 miles, and as recently as 12 days after a different recall repair
Symptoms owners cite: Airbag warning light stays on or illuminates intermittently; Horn non-functional; Cruise control on steering wheel does not work; Steering wheel audio controls inoperative; Driver-side squib circuit short
Codes mentioned: Airbag system fault, Squib circuit short, Spiral cable open/short
Repairs/costs cited: $460–$603 replacement cost (labor and part). Diagnostic fee $88–$94.95 charged separately. No replacement plug sold by Toyota; independent shops source used parts. Failure recurs on some vehicles even after warranty repair.
Recalls/TSBs owners mention: Safety recall issued (owners cite VIN eligibility for recall but some did not receive notice). Toyota initially refused warranty coverage on one vehicle, claiming safety defect exclusion; customer escalation to corporate resulted in coverage denial. Dealer diagnostic fees not reimbursed under recall process.
Engine Stalling / Loss of Power
Vehicle stalls without warning at various speeds (5 MPH to 70 MPH), often during clutch/shift operation. Engine fails to restart for approximately 10 minutes after stalling. Problem began at 800 miles on new truck and persisted at 26,000 miles; owner lemon-law window had closed.
When: From 800 miles (new); one complaint at 26,000 miles
Symptoms owners cite: Engine stalls at variable speeds; Loss of power while shifting (manual transmission); Engine does not restart immediately after stall; 10-minute restart delay reported
Codes mentioned: Ignition or fuel system fault (unconfirmed by dealer)
Repairs/costs cited: No repair documented; manufacturer unable to duplicate problem despite multiple incidents.
Recalls/TSBs owners mention: Case# 200701040167 assigned. Manufacturer stated unable to duplicate failure.
Fuse / Wiring Protection Inadequacy (Trailer Wiring Fault)
30-amp fuse failed to protect trailer wiring circuit during short circuit event. 30-amp fuse installed on #12 gauge wire circuit; auto electric shop noted #12 wire should be protected by max 20-amp fuse. Wire melted and fuse box damaged, causing total wiring system failure and near-total vehicle fire. Repair required $2800 parts + $2000 labor. Toyota refused to discuss design flaw because repair was not performed at dealership.
When: Occurred after less than 1 mile of towing due to trailer short circuit
Symptoms owners cite: Trailer wiring short circuit triggered truck wiring fire; Melted wiring looms; Fuse box damage; Total electrical system failure
Codes mentioned: Circuit protection failure (design fault alleged)
Repairs/costs cited: $2800 parts + $2000 labor at independent auto electric shop. Independent shop identified potential design flaw: 30-amp fuse on #12 wire instead of 20-amp max.
Recalls/TSBs owners mention: Toyota corporate refused to discuss or acknowledge potential design defect when repair was not performed at dealership.
Blower/HVAC Resistor Overheating
A/C blower resistor develops hot spots on connectors and plug, indicating chronic overheating. Loose or corroded connections cause overheating before resistor fails. Problem intermittent and recurring; owner replaced resistor once thinking it was faulty, only to find hot spots remain on plug. Fire risk cited as safety concern. At 81,500 miles resistor was replaced due to loose connections.
When: At 81,500 miles (first noted); recurring intermittently for years; worsens during warm months
Symptoms owners cite: A/C works intermittently; Visible hot spots on all 4 conductor pins in plug; Plug overheating on middle two connections; Resistor connector corrosion/loose connections
Repairs/costs cited: Resistor replaced once ($cost not stated). No replacement plug available from Toyota. Used parts suppliers reportedly show similar heat damage on many plugs of this type.
Recalls/TSBs owners mention: Toyota service manager unaware of service bulletins or recalls. No parts availability for OEM replacement plug.
Brake Warning Light Illumination & Ignition System Malfunction
Brake warning indicator illuminates continuously while driving. Engine does not turn off when ignition is turned to OFF position; remote start button required to shut engine down. Failure recurred multiple times after manufacturer recall repair. Independent mechanic diagnosed leaking brake lines requiring replacement.
When: After manufacturer recall repair was performed; recurred numerous times
Symptoms owners cite: Brake warning light stays on; Ignition key-off does not stop engine; Requires remote start button to shut engine off; Brake line leakage
Repairs/costs cited: Brake lines replaced by independent mechanic. Mileage at failure unknown.
Recalls/TSBs owners mention: Vehicle was covered under recall repair initially, but failure recurred and manufacturer was notified.
Check Engine Light / Malfunction Indicator Lamp (MIL) Stuck On
Check engine light will not turn off. Independent service facility determined it is an electrical board problem. Toyota issued safety recall letter stating MIL malfunction is the cause, but remedy not yet available. Owner received only partial recall notice without official service authorization. Dealer wants customer to pay $300–$400 upfront for diagnosis and repair, then submit receipts to Toyota for reimbursement—an unacceptable burden for owner without liquid funds.
When: Timing not specified in complaint
Symptoms owners cite: Check engine light remains illuminated continuously; MIL does not respond to ignition cycles
Codes mentioned: Electrical board fault (per independent shop)
Repairs/costs cited: $300–$400 estimated repair cost at dealer, with reimbursement contingent on submission of documentation.
Recalls/TSBs owners mention: Toyota issued safety recall letter (NVS-200 referenced) citing MIL malfunction, but remedy not available. Dealer unaware of recall at time of complaint. Recall process requires customer upfront payment with promised reimbursement.
Directional Signal & Hazard Flasher Failure (Temperature-Dependent)
Directional signals and hazard flashers cease functioning when ambient temperature exceeds 85–90 degrees. Function returns to normal once vehicle cools. Problem likely in engine compartment electrical components. A/C operation in cab does not cool engine compartment, isolating electrical components from cooling effect. Owner suspects engine compartment heat source.
When: Recurring during warm/hot weather conditions; resolves when cooled
Symptoms owners cite: Directional signals inoperative in heat above 85–90 degrees; Hazard flashers non-functional in high heat; Normal function resumes after cooling
Repairs/costs cited: No repair documented; issue remains ongoing.
Recalls/TSBs owners mention: No manufacturer response documented.
Cigarette Lighter Fire
Cigarette lighter popped out of receptacle and ignited on truck floor at approximately 4,000 miles. Fire destroyed 75% of truck interior. Dealer called it a manufacturing issue and offered no assistance. Toyota investigator examined truck for 4 hours; 2 months later Toyota claimed external ignition source could have started fire, implying owner responsibility. No resolution or recall issued.
When: At approximately 4,000 miles (brand new truck)
Symptoms owners cite: Cigarette lighter ejects from receptacle; Lighter ignites interior materials; Uncontrolled fire spread
Repairs/costs cited: Fire destroyed 75% of interior. No repair cost stated; vehicle deemed destroyed.
Recalls/TSBs owners mention: Dealer acknowledged manufacturing issue but offered no help. Toyota investigator's final determination: external source may have caused fire (implying no manufacturer fault).
Wiring Harness Fire (Neutral Safety Switch Area)
Electrical wiring tied into frame wiring harness related to neutral safety switch caught fire twice. Vehicle has only 61,000 miles and is garage-kept in pristine condition (no scratches). Rear leaf spring mounts are broken and have punctured the fuel tank, complicating diagnostics. Owner reports poor construction quality.
When: At 61,000 miles (low-mileage garage truck)
Symptoms owners cite: Wiring harness fire (two separate incidents); Neutral safety switch wiring failure; Frame wiring harness involvement
Repairs/costs cited: No repair documented; vehicle deemed unsafe to operate.
Recalls/TSBs owners mention: Toyota notified but owner reports they 'could care less' about safety concern.
Synthesized from 20 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
This has been going on for few years. This month my a/c started working intermittently again. I have replaced the resistor before thinking it was bad..that's when I first noticed the hot spots. This time I investigated more. Now all 4 conductors are showing signs of a hotspots and the plug also is showing signs of overheating on the two middle connections. Toyota's service manage didn't know…
Had electrical trouble with your 2006 Toyota Tacoma?
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 Tacoma?
It's a meaningful issue. 20 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 14 complaints that reported odometer mileage, most electrical failures cluster between 38,000 and 97,000 miles, with the median around 80,000. A quarter of owners report trouble before 38,000; a quarter make it past 97,000. 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/Tacoma.
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.