2003 Toyota 4RUNNER Engine Problems
- Complaints
- 10about this part
- Share
- 1%of 696 total for the year
- Median mileage
- 155,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 10 complaints about the engine of the 2003 Toyota 4RUNNER, 1% of the 696 complaints for this model year. Where a mileage was given, the median is 155,000 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.
“Takata recall . So I'm not understanding a problem with my Toyota 4RUNNER. As of yesterday there was a great amount of smoke coming from the area of the oil stick from my assumption the oil was getting on the cadillac converter. Or something that would hit something hot on the engine to cause it to smoke I'm trying to find out if there is a recall for that.”
NHTSA complaint #11180693, filed 2019-02, 185,000 miles“I was driving down the highway after getting off the interstate when my vehicle began to overheat. I luckily noticed and pulled over before incurring more damage and warping the engine head. I have heard multiple times that these 4.0 v6's Toyota made have head gasket problems. After getting it towed back to the mechanic on thanksgiving, I was told I had a blown/leaking headgasket. I have never drove this vehicle over 3k rpms and find it ridiculous it would fail under such good condition.”
NHTSA complaint #10937713, filed 2016-12, 155,000 miles“So first off I had a Ford Escape and one day it wouldn’t crank up and started beeping loud so I called and got it towed it sat in the shop for 3 days and they told me it was fixed they fixed the abs lights and was told it was ready and I didn’t even make it out of shop and the car was running hot and als realized the miles had been docked back a lot and had to be towed again a week came around and the fan stopped spinning and they said they offer me a trade in because they didn’t know what was wrong well I got this 2003 4 runner and these both were under warranty 3 months in and both had to…”
NHTSA complaint #11771525, filed 2026-10“The rust and corrosion underneath the vehicle continually gets worse year after year. The main components of vehicle relating to the engine, powertrain and suspension underneath vehicle are corroded; holes exist in the frame of the truck through out. The frame of truck is rotted due to not being sealed properly during the manufacturing process. Due to the rust and corrosion on the frame of truck, it is impossible to get work done on exhaust and muffler areas. I will send pictures for your reference. This makes driving a safety concern for myself and my son. …”
NHTSA complaint #11460830, filed 2022-04“The frame of the car has been rusting at a significant rate in the last 4 years. Mechanic identified major rust issues that would make the vehicle not safe in case of an accident.”
NHTSA complaint #11463988, filed 2022-05Related service bulletins
- 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…
- 10149217Sep 14, 2016TSB: Supersession Notice. Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are…
- 10150414Sep 8, 2016Technical Instructions: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service…
- 10150413Sep 8, 2016Dealer Package: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service Campaign (SSC)…
- 10150412Sep 8, 2016Dealer Package email: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service Campaign…
- 10150411Sep 8, 2016Region Letter: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service Campaign (SSC)…
- 10150410Sep 8, 2016Region Letter email: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service Campaign…
- 10134223Sep 15, 2015TT: The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been interrupted.
- 10096556Sep 15, 2015Tt: the vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the engine ecm has been interrupted.
- 10132529Aug 24, 2015TechTip: Condition - The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 2 | 3% |
| 2024 | 1 | 10% |
| 2023 | 2 | 6% |
| 2022 | 1 | 3% |
| 2019 | 6 | 9% |
| 2018 | 5 | 8% |
| 2017 | 2 | 6% |
| 2016 | 6 | 8% |
| 2015 | 8 | 9% |
| 2014 | 6 | 8% |
| 2013 | 3 | 8% |
| 2012 | 5 | 5% |
| 2011 | 6 | 4% |
| 2010 | 3 | 2% |
| 2009 | 2 | 9% |
| 2008 | 7 | 7% |
| 2007 | 3 | 2% |
| 2006 | 7 | 2% |
| 2005 | 21 | 5% |
| 2004 | 18 | 3% |
| 2003 | 10 | 1% |
| 2002 | 5 | 2% |
| 2001 | 5 | 3% |
| 2000 | 4 | 1% |
| 1999 | 3 | 1% |
| 1996 | 1 | 1% |
| 1995 | 8 | 5% |
| 1994 | 1 | 2% |
| 1992 | 1 | 2% |
| 1990 | 1 | 1% |
Other parts of the 2003 Toyota 4RUNNER
284 complaintsSuspension
114 complaintsOther or unknown
111 complaintsEngine cooling
89 complaintsBrakes
74 complaintsTransmission and drivetrain
39 complaintsSteering
35 complaintsVehicle speed control
29 complaintsSeats
21 complaintsVisibility (wipers, defrost, mirrors)
18 complaintsWheels
15 complaintsFuel system
13 complaints
← All problems reported for the 2003 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