2012 Toyota 4RUNNER Electrical system Problems
- Complaints
- 6about this part
- Share
- 6%of 96 total for the year
- Median mileage
- 37,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the electrical system of the 2012 Toyota 4RUNNER, 6% of the 96 complaints for this model year. Where a mileage was given, the median is 37,000 miles. 1 recall campaign on record is filed under a similar system.
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.
“Squirrels keep eating my electrical wiring and the wiring harness. They access the engine bay through the openings in the wheel wells after jumping on top of the tires. The results have disabled my ABS, 4wd, limited slip, etc. I've tried rodent repellent, fox urine, and parking in the garage. Nothing helps. Toyota needs to stop using soy based wiring, and they need to close the holes in the wheel wells.”
NHTSA complaint #10859964, filed 2016-04, 63,000 miles“Toyota uses new green (environment friendly) wiring that is tasty to rodents and other pest- they are aware that it can attract animals to eat the wiring and electrical systems on their vehicles and refuse to cover the damages incurred on the warranty - they refer the customers to seek monetary aide from their insurance company - in my case it was $3000.00 in damages to my vehicle for a rat eating the wires /electrical system. My insurance paid for it - but how can I be assured it will not occur again. ?? Toyota needs to be responsible.”
NHTSA complaint #10644989, filed 2014-10, 37,000 miles“I came home last night at about 9:30 pm and parked the car in the garage. This morning at 7:30 am I went into the garage and heard a buzzing sound coming from near the rear wheels of the car. My best guess was the fuel pump was still running (I had a different problem with a fuel pump not running when the ignition was turned on with a 2000 jaguar about a year ago). I turned the ignition on and off without cranking the engine, the buzzing continued. I started the 4RUNNER, ran it for about 20 seconds, and shut the engine off. Buzzing stopped.”
NHTSA complaint #10532819, filed 2013-07, 11,450 miles“The backup camera does not work consistently. While not moving and then shifiting into reverse, the screen does not change or changes to something other than the camera. It usually stops working after several stops and shifts into reverse. Sometimes it goes 2 or 3 days without displaying and then starts working again another day.”
NHTSA complaint #11383575, filed 2020-12, 85,000 milesRelated recalls
- 12V120000Mar 23, 2012Gulf states toyota is recalling certain model year 2012 4runner and sienna vehicles, equipped with non-original equipment remote engine starters. A…Covers: Toyota 4RUNNER 2012, Sienna 2012
Related service bulletins
- 10238157May 30, 2023TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered…
- 10182983Oct 12, 2020TT: Some customers may encounter Bluetooth® connectivity concerns such as: ?Difficulty to pair the phone. ?Intermittent Bluetooth® failure to connect to the vehicle when first…
- 10169334Nov 18, 2019TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active after the initial trial period. Once the subscription has expired the DCM…
- 10164330Jul 1, 2019TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections…
- 10155247Feb 28, 2019TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first…
- 10133654Nov 22, 2017TSB: REVISION NOTICE November 22, 2017 Rev1: ? Applicability has been updated to include 2014 ? 2018 model year vehicles. Any previous printed versions of this bulletin should be…
- 10142506Apr 19, 2017TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active. The first year of service is provided in the vehicle purchase price. Once…
- 10152205Jan 6, 2017TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0101-11. Applicability has been updated to include 2016 ? 2017 model year vehicles…
- 10132930Nov 29, 2016TSB: OBSOLETE NOTICE: September 14, 2016: This bulletin is now obsolete. Please see T-SB-0134-16.
- 10132642Oct 3, 2016TT: Some customers may experience Bluetooth disconnections or loss of SMS text message functionality on the navigation/audio system with Android phones running OS 4.4 or later…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 14% |
| 2025 | 8 | 13% |
| 2024 | 2 | 20% |
| 2022 | 2 | 5% |
| 2021 | 3 | 8% |
| 2020 | 1 | 3% |
| 2019 | 8 | 12% |
| 2018 | 4 | 7% |
| 2017 | 5 | 14% |
| 2016 | 18 | 23% |
| 2015 | 13 | 15% |
| 2014 | 24 | 31% |
| 2013 | 4 | 11% |
| 2012 | 6 | 6% |
| 2011 | 6 | 4% |
| 2010 | 4 | 3% |
| 2009 | 4 | 18% |
| 2008 | 5 | 5% |
| 2007 | 13 | 8% |
| 2006 | 18 | 5% |
| 2005 | 9 | 2% |
| 2004 | 22 | 3% |
| 2003 | 12 | 2% |
| 2002 | 3 | 1% |
| 2001 | 6 | 3% |
| 2000 | 4 | 1% |
| 1999 | 17 | 5% |
| 1998 | 11 | 4% |
| 1997 | 6 | 2% |
| 1996 | 3 | 2% |
| 1995 | 6 | 3% |
| 1993 | 5 | 10% |
| 1992 | 6 | 11% |
| 1990 | 1 | 1% |
Other parts of the 2012 Toyota 4RUNNER
70 complaintsBrakes
7 complaintsFuel system
6 complaintsOther or unknown
6 complaintsEngine
5 complaintsSteering
5 complaintsBody and structure
2 complaintsSuspension
2 complaintsVehicle speed control
2 complaintsElectronic stability control
1 complaints
← All problems reported for the 2012 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