2018 Toyota 4RUNNER Electrical system Problems
- Complaints
- 4about this part
- Share
- 7%of 60 total for the year
- Median mileage
- 55,110miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the electrical system of the 2018 Toyota 4RUNNER, 7% of the 60 complaints for this model year. Where a mileage was given, the median is 55,110 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.
“Purchased vehicle brand new with 18 miles on it. I get it serviced like clockwork and have never missed a maintenance appointment. A little over a week ago, the electrical locking system on the drivers side door stopped functioning. Toyota is telling me that there are no recalls and it will cost me almost $1000.00 to repair. Now, the electric locking system for the passenger side door is not working and Toyota is still saying it is nothing they can do because there is no recall and the vehicle is no longer under warranty. This is not acceptable. …”
NHTSA complaint #11372555, filed 2020-11, 55,110 miles“Vehicle was being driven on beltway and suddenly lost all power, braking, and steering capabilities. Emergency brake was used to stop vehicle. Vehicle was not able to be restarted. Phone attached via cigarette outlet was zapped. Manufacturer has failed to assume any responsibility customer has endured due to this total vehicle malfunction.”
NHTSA complaint #11404761, filed 2021-03, 8,000 miles“Odometer Fraud. The contact purchased a 2018 Toyota 4Runner. The contact discovered that there was a mileage discrepancy per a Carfax report. The vehicle was a dealer sale. At the time of the purchase, the vehicle mileage was 65,862. However, the Carfax report indicated that the mileage was 61,000 in April 2022; 90,000 in February 2023; and 54,000 towards the end of the month in February 2023. The contact stated that the current approximate mileage was 86,000.”
NHTSA complaint #11750896, filed 2026-07, 86,000 miles“Apparently rodents have gone to the engine and ate the soy wires to the harness. This in turn has cost me over $1000 to fix. The only warning was when the warning lights came on and four runner started to shake when started.”
NHTSA complaint #11570049, filed 2024-02Related service bulletins
- 11022964Aug 20, 2025Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Free volume being too low.
- 11020657Jun 13, 2025The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service…
- 10245488Oct 25, 2023TI: TECHNICAL INSTRUCTIONS FOR LIMITED SERVICE CAMPAIGN K0P CUSTOMER SUPPORT PROGRAM 19TE12 SAFETY CONNECT SYSTEM ? VEHICLE LOCATION INACCURATE CERTAIN 2013 ? 2019 MODEL YEAR…
- 10245487Oct 25, 2023DP: The Data Communication Module (DCM) in the subject vehicles are equipped with software to identify the location of the vehicle using the Global Positioning System (GPS) to…
- 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…
- 10224102Jun 3, 2022TSB: Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio (version 01013E), Entune? Audio Plus (version 010156 or 01015C), or Entune? Premium Audio (versions…
- 10220177Jun 3, 2022TSB: Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio (version 01013E), Entune? Audio Plus (version 010156 or 01015C), or Entune? Premium Audio (versions…
- 10211830Apr 29, 2022Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio (version 01013E), Entune? Audio Plus (version 010156 or 01015C), or Entune? Premium Audio (versions…
- 10207963Jan 28, 2022TSB This Service Bulletin includes guidelines meant to help determine whether to repair or replace a wire harness assembly based on damage type. This Service Bulletin should be…
- 10188915Feb 8, 2021TSB: Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio (version 01013E), Entune? Audio Plus (version 010156 or 01015C), or Entune? Premium Audio (versions…
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 | 22% |
| 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 2018 Toyota 4RUNNER
12 complaintsFuel system
9 complaintsOther or unknown
9 complaintsAir bags
8 complaintsBrakes
7 complaintsEngine
5 complaintsBody and structure
5 complaintsSuspension
4 complaintsTransmission and drivetrain
3 complaintsElectronic stability control
2 complaintsSeat belts
2 complaintsVehicle speed control
2 complaints
← All problems reported for the 2018 Toyota 4RUNNER
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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