2018 Toyota Sequoia: what breaks, and at what mileage

The failures owners actually file about

Owners have reported 11 named failure modes on the 2018 Toyota Sequoia, and the three most-reported carry 53% of everything filed.

Cruise control failure leads with 9 reports, about 0.3 per 1,000 vehicles and with the middle half of reports between 12 to 20 miles.

Blind spot monitor failure follows with 6 reports, median 5,000 miles.

Lane keep or steering assist fault follows with 4 reports, median 45,000 miles.

By system, the reports fall mostly into adas (23), body (3) and steering (2).

What happens when these parts fail

Nothing in the reports on the 2018 Toyota Sequoia mentions a crash, a fire or an injury. That is the ordinary case and it is worth stating: most defect complaints are about a car that stopped working, not one that hurt somebody.

The average severity weight across every report on this year is 3.22, where a stalled engine or a failed airbag weighs many times more than a rattling trim panel, and a figure this high means the reports are dominated by failures with safety consequences rather than annoyances. The weighting is set out in full on the methodology page.

What the top failures cost to put right, as editorial estimates for an independent US shop rather than figures from NHTSA: cruise control failure at $200–$1,400, blind spot monitor failure at $250–$1,300, lane keep or steering assist fault at $200–$1,600 and other driver assistance problem at $250–$1,800. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.

How often, against how many were built

Scaled by an estimate of how many of these cars exist, the 2018 Toyota Sequoia draws about 1.1 per 1,000 vehicles, which puts it in the 73rd percentile of complaint rates among 2018 vehicles we can rate.

That denominator is the weakest number on the page and it is fair to say so plainly. Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound.

The working figure is 32,450 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2018 vehicles, which is what the risk score uses, is far more robust than the rate itself.

Recalls on the 2018 model year

NHTSA has issued 5 recall campaigns covering the 2018 Toyota Sequoia, affecting an estimated 88,998 vehicles. A recall is a different kind of evidence from a complaint: it is the regulator and the manufacturer agreeing that something has to be fixed, and the fix is free for as long as the car exists.

The campaigns cover steering:hydraulic power assist system, steering:rack and pinion, fuel system, gasoline:delivery:fuel pump and air bags. Whether the work was actually done on the car in front of you is a question only the VIN can answer, and the manufacturer or NHTSA will answer it free.

One caution about reading these together: a recall usually raises the complaint count for the same part, because owners who read about it go and file. The mileages stay informative; the counts get noisy.

Where 2018 sits in the model line

High risk for a 2018 — 219th riskiest of the 251 2018 vehicles we can rate. The comparison is always within the same model year, so an older car is never penalised for having had longer to break.

Across the 15 model years of this car that carry enough reports to score, 2006 comes out best at 63 and 2015 worst at 79, with 2018 itself at 68.

If the model year is negotiable, 2006, 2004, 2007 and 2008 score lower than 2018 by a margin worth acting on. Same body, same engines, different luck — usually a supplier change or a mid-cycle fix, which the complaint data can show but never explain.

Where to spend the inspection money

The mileages below are where the first quarter of reports for each mode had already been filed, which makes them the point at which a fault is worth looking for rather than the point at which it happens: cruise control failure from about 12.

On a 2018 Toyota Sequoia with more miles than that on it, the useful question to put to a seller or a mechanic is whether cruise control failure has been dealt with, and if so with what parts and at whose expense. A car that has already had the repair is in a different position from one that has not.

Treat it as where to point the inspection, not as a prediction. A well-maintained example can sail past every mileage on this page, and a neglected one can fail well before the first of them.

Where these figures stop being useful

36 owner reports; fleet size estimated from this year's own recall paperwork. Every count on this page is therefore a floor: it is the number of owners who went to the trouble of filing with a federal agency, which is a small and self-selected fraction of the owners who had the fault.

Of those 36 reports, 28 carried an odometer reading, so the mileages here describe 78% of the sample rather than all of it. Owners also round: readings pile up on multiples of ten thousand, which is why this site publishes "about 90,000 miles" and not "91,438".

The failure modes are assigned by software reading the owner's own words, which is accurate in bulk and wrong in individual cases. A mode with a handful of reports may contain a misfiled one.

And nothing here predicts what one car will do. These are other people's complaints, filed years apart, on cars maintained by strangers. Read the page as a map of where this model year has previously gone wrong, then have the specific car in front of you inspected.