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EnginePart report

2016 Toyota 4RUNNER Engine Problems

Complaints
6about this part
Share
8%of 80 total for the year
Median mileage
4,867miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 6 complaints about the engine of the 2016 Toyota 4RUNNER, 8% of the 80 complaints for this model year. Where a mileage was given, the median is 4,867 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“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 on the repair and I am stuck without the vehicle. I do not have that kind of money to repair it myself. …”

NHTSA complaint #10935876, filed 2016-12, 13,500 miles

“2016 Toyota 4RUNNER with less than 5000 miles every once in a while I have noticed a lack of response to throttle when making a right hand turn. By this I mean no increase in engine RPM's proportional to throttle position. I have shrugged it off as my imagination. Now I have had two occasions where after coming to a stop at a stop sign on a steep incline where when I released the brake pedal and stepped on gas the vehicle rolled back even though I had at least 1/4 throttle applied. Not a good situation if there is a vehicle behind you.”

NHTSA complaint #10910880, filed 2016-09, 4,867 miles

“Toyota knowingly uses a soy based wire coating that attracts rodents. Something chewed through the wiring harness making my vehicle shake uncontrollably and act very strange. This is a huge safety concern because what if the damage was only partial and then through normal use like highway driving the wire fully comes apart disrupting any and all safety features”

NHTSA complaint #10993402, filed 2017-06, 12,000 miles

“Since new, I have documented at least 20 occurrences of lack of acceleration, several times almost resulting in an accident. All occurrences happen from a stopped position, then applying at least half accelerator pedal, the truck will initially accelerate, then pause for several seconds, very scary when crossing traffic or going through an intersection. Happens on turns and when going straight.”

NHTSA complaint #11113810, filed 2018-07, 10 miles

“This vehicle is junk. Has no power, excessive vibration, constant ticking, all over the road, cruise control speeds up uncontrollably, sits lopsided, extremely loud, brakes and steering lock up.,lacks heat, poor visibility . All these and more occurr while starting and driving vehicle.”

NHTSA complaint #10956888, filed 2017-02, 230 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
202523%
2024110%
202326%
202213%
201969%
201858%
201726%
201668%
201589%
201468%
201338%
201255%
201164%
201032%
200929%
200877%
200732%
200672%
2005215%
2004183%
2003101%
200252%
200153%
200041%
199931%
199611%
199585%
199412%
199212%
199011%

Other parts of the 2016 Toyota 4RUNNER

Electrical system
18 complaints
Other or unknown
18 complaints
Air bags
10 complaints
Suspension
9 complaints
Body and structure
8 complaints
Transmission and drivetrain
6 complaints
Brakes
5 complaints
Fuel system
4 complaints
Steering
4 complaints
Visibility (wipers, defrost, mirrors)
4 complaints
Wheels
4 complaints
Back-over prevention (rear camera)
3 complaints

← All problems reported for the 2016 Toyota 4RUNNER

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology