Rodents chewed up wiring harness for fuel injector. Vehicle parked in encoded garage.
2016 Toyota 4Runner electrical problems
severe 17 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
17
Recalls
0
Avg fix
$850
1fire
When does it fail?
Of the 17 electrical complaints filed for the 2016 Toyota 4Runner, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 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
Among the 16 model years of Toyota 4Runner in our records for electrical problems, this one ranks #2 by owner-complaint volume.
Electrical accounts for 22% of all owner complaints filed against this vehicle, across 8 categories tracked.
What owners are reporting 3 most recent
Bought a used 2016 4runner. Had it 3 weeks and a rodent chewed the wires on the main wiring harness. Toyota (that I have 2 warranties through) does not cover rodent damage even though the material that they use attracts rodents apparently from my research. I have $3500-$5500 in damage and my car has been at the dealership waiting for repair for 3 weeks now. The insurance company is fighting them…
The wiring inside of the engine was chewed through by rodents. I drive the vehicle every day and it was serviced two days before. After performing some research, I found out that Toyota and other companies use soy based products to make wiring. This apparently attracts rodents as it is basically food for them.the vehicle was parked in front of my home in a marked parking spot. I have parked…
Had electrical trouble with your 2016 Toyota 4Runner?
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 2016 Toyota 4Runner?
It's a meaningful issue. 17 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 9 complaints that reported odometer mileage, most electrical failures cluster between 12,000 and 40,000 miles, with the median around 29,922. A quarter of owners report trouble before 12,000; a quarter make it past 40,000. 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/2016/Toyota/4Runner.
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.