The contact owns a 2015 Toyota Highlander. The contact stated while driving at 30 MPH, the vehicle accelerated without any warning at high speed. The contact desperately depressed the brake pedal, but the vehicle would not stop, causing the vehicle to drive into traffic and striking several vehicles causing front damage to the vehicle. The contact was unsure if anyone was injured. A police report…
2015 Toyota Highlander powertrain problems
severe 7 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Complaints
7
Recalls
0
Avg fix
$2,500
1crash
When does it fail?
Of the 7 powertrain complaints filed for the 2015 Toyota Highlander, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 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 powertrain complaint has been filed on this vehicle in over 3 years — the issue may be aging out of the active population.
What owners are reporting 2 most recent
When driving my highlander the following error messages appeared, error keeping the start button pressed will cause an emergency stop. I dismissed this. Then it popped up a message that car cannot drive while brake and accelerator are pressed simultaneously. I lost ability to accelerate so tried to pull of busy road, pressing the brake pedal restored acceleration. Then when I stopped in traffic…
Had powertrain trouble with your 2015 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 powertrain problem on the 2015 Toyota Highlander?
It's a meaningful issue. 7 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Based on the 7 complaints filed, powertrain issues most often appear around 81,557 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain 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 powertrain?
No active recalls currently cover powertrain 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/2015/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.