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full bulletin at NHTSA ↗2006 Toyota Sequoia engine problems
moderate 10 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
10
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 10 engine complaints filed for the 2006 Toyota Sequoia, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 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 engine complaint has been filed on this vehicle in over 17 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 engine 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 Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded.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: Supersession Notice. Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprogramming process and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the vehicle/ECU combination for which they are intended. ECUs have internal security that will not allow them to be programmed with another ECU?s information.
full bulletin at NHTSA ↗TT: THE VEHICLE MAY BE DIFFICULT TO START OR HAVE AN ABNORMALLY LOW OR ROUGH IDLE AFTER THE BATTERY HAS BEEN DISCONNECTED OR POWER TO THE ENGINE ECM HAS BEEN INTERRUPTED.
full bulletin at NHTSA ↗TT: The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been interrupted.
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 Sequoias report persistent unintended acceleration surges while stopped in traffic and at lights, with one claiming he must stop 8–10 feet back to avoid striking vehicles ahead. Dealerships dismissed the problem as AC compressor engagement or perception, but the owner's experience predates his previous 2002 Sequoia and occurs regardless of AC status.
The most common complaint involves sudden loss of power and complete stalling accompanied by all dashboard warning lights illuminating at once—sometimes at highway speeds. One owner had a valve spring key replaced but says the key loosened afterward, causing misfire. Other dealers have diagnosed similar failures but left vehicles unrepaired or made unknown repairs that failed days later.
Secondary air system breakdowns push vehicles into limp mode with jerky, difficult driving; owners cite repair costs of 2,000–3,000 dollars for a defect they say Toyota knows about but has not recalled. Multiple owners report check engine, VSC track, and VSC lights coming on intermittently; dealers have made eight or more diagnostic attempts without resolution. One radiator failed at just 2,700 miles and caused overheating. Throughout, dealerships consistently report they cannot duplicate problems or cannot diagnose the root cause.
Same Toyota Sequoia engine reports on nearby years: 2005 · 2007
Failure modes owners describe
Unintended acceleration surge at stop
Vehicle suddenly accelerates and lurches forward while stopped in traffic or at lights, even with foot on brake. Owner reports nearly hitting vehicles in front. Dealership claimed it was AC compressor engagement or perception, but owner reports it occurs with AC both on and off, and more frequently in summer. Owner also states this never happened in previous 2002 Sequoia.
When: 49,000 miles
Symptoms owners cite: sudden forward lunge while stopped; occurs at traffic signals and in traffic; happens with and without AC; more frequent in summer months; occurs even with brake pedal pressed
Repairs/costs cited: Dealership unable to duplicate; suggested it was AC pump engagement and told owner it was normal
Recalls/TSBs owners mention: No recall; dealership stated unable to reproduce problem
Loss of power and stalling with warning lights
Vehicle loses power and all warning lights illuminate on instrument panel while driving. Occurred at highway speeds (60 mph) and at stop lights. Multiple recurrences after initial repair attempts. One case involved valve spring key replacement; owner reports key loosened afterward causing misfire.
When: 76,000 to 112,966 miles
Symptoms owners cite: loss of power while driving; all warning lights illuminate simultaneously; vehicle stalls; recurring failure after repair; misfire after valve spring key replacement
Repairs/costs cited: Valve spring key replaced in one case but repair was done incorrectly per owner; another case had unknown repairs; one dealer advised air pump was cause but did not repair
Recalls/TSBs owners mention: Manufacturer notified in some cases; no recall mentioned
Secondary air system failure causing limp mode
Secondary air system repeatedly fails, placing vehicle in limp mode and causing jerky, difficult driving. Owner cites this as a known defect with no recall despite significant repair cost.
When: <UNKNOWN>
Symptoms owners cite: vehicle enters limp mode; jerky driving; system repeatedly fails
Repairs/costs cited: Repair cost cited as 2,000–3,000 dollars
Recalls/TSBs owners mention: No recall; owner indicates this is a known defect
Misfire and dashboard warning lights
Vehicle vibrates and dashboard lights illuminate while driving at various speeds. Dealership diagnosed misfire but did not repair. In another case, check engine, VSC track, and VSC lights illuminated intermittently with dealer unable to duplicate after eight attempts.
When: 70,000 to 111,354 miles
Symptoms owners cite: vehicle vibration; dashboard warning lights illuminate; check engine light; VSC track light; VSC light; intermittent illumination
Repairs/costs cited: Misfire diagnosed by dealer but no repair performed; warning lights remained unresolved despite eight diagnostic attempts at another dealer
Recalls/TSBs owners mention: Manufacturer not aware of failures in some cases; no recall mentioned
Radiator failure and engine overheat
Radiator failed early in vehicle's life and sprung a leak, causing engine to overheat.
When: 2,700 miles
Symptoms owners cite: radiator leak; engine overheat
Synthesized from 10 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Check engine light,vsc trac,trac off lights all on at the same time. *tr
Had engine trouble with your 2006 Toyota Sequoia?
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 engine problem on the 2006 Toyota Sequoia?
It's a documented issue but not catastrophic. 10 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 9 complaints that reported odometer mileage, most engine failures cluster between 47,000 and 112,854 miles, with the median around 76,000. A quarter of owners report trouble before 47,000; a quarter make it past 112,854. 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 $3,100 for engine 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 engine?
No active recalls currently cover engine 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/Sequoia.
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.