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2021 Toyota 4Runner Owner Complaints

Updated May 30, 2026
Ethan Miller
2021 Toyota 4Runner Owner Complaints

Complaint Summary

The 2021 Toyota 4Runner has 49 reported complaints.

  • Top issues involve steering and suspension.

Reliability Score

Reliability Score

8.8/ 10

Based on 49 complaints

Most Frequent Issues

STEERING

11 22.4%

SUSPENSION

10 20.4%

SERVICE BRAKES

5 10.2%

WHEELS

4 8.2%

ELECTRICAL SYSTEM

3 6.1%

Quick Insights

  • The top category is STEERING, accounting for 22.4% of all complaints.

  • Owners have reported issues across 17 distinct vehicle systems.

  • Note: Complaint data reflects owner reports and may not always indicate a verified defect. Compare with Recalls and TSBs for a complete picture.

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Complaint Summary

What owners keep reporting on the 2021 Toyota 4Runner

The 2021 Toyota 4Runner has 49 owner complaints in this dataset. STEERING is the most common complaint category, representing about 22% of the reports shown here.

Most common complaint categories

The top complaint groups for the 2021 Toyota 4Runner are STEERING (11), SUSPENSION (10), SERVICE BRAKES (5).

Are these complaints a serious red flag?

Potentially. 31 complaint reports involve higher-attention systems like brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components, which is enough to justify a focused inspection.

What should buyers inspect on a used 2021 Toyota 4Runner?

Start with the top complaint systems, compare them against the recall report, then inspect service records for evidence that those same areas were already repaired or monitored.

Read the full buyer guideRecall report and remedy notesMaintenance costs and intervals2020 4Runner complaints2022 4Runner complaints2019 4Runner complaints

Detailed Complaint Log

Showing 17 of 17 systems

STEERING

11 Reports22% of total

Previewing the first 2 complaint summaries.

I BOUGHT A 2021 4RUNNER LATE APRIL OF 2021. I REPORTED AND SCHEDULED AN APPOINTMENT FOR A BALANCE CHECK. THIS DIDN'T SEEM TO FIX THE PROBLEM. WHILE THEY WHERE IN THE PROCESS OF BALANCING THE TECH BROKE 2 CENTER CAPS. I WILL SETTING UP AN APPOINTMENT TO HAVE THE DEALERSHIP RECHECK AND ALIGNMENT. I'VE READ REPORTS WHERE THIS HAS BEEN A PROBLEM BEFORE WITH A LOT OF 4 RUNNERS. I'M DISAPPOINTED WITH THE CUSTOMER SERVICE AS WELL THERE. PLEASE HELP ME RESOLVE THIS PROBLEM. I REALLY LOVE THE VEHICLE BUT AT 60-65MPH THE STEERING WHEEL SHAKES AND THE 4RUNNER WANTS TO PULL TO THE RIGHT.

5/9/2021

The steering wheel will shimmy between 50-61mph. Just under 60mph is when it's most apparent. Worse on a cold morning when beginning commute. Can vary from slight vibration felt in the hand to visibly shaking. Can also be felt on the vehicle floor and seats when at its worst.

5/21/2021

9 more complaints are available in this category.

SUSPENSION

10 Reports20% of total

Previewing the first 2 complaint summaries.

I BOUGHT A 2021 4RUNNER LATE APRIL OF 2021. I REPORTED AND SCHEDULED AN APPOINTMENT FOR A BALANCE CHECK. THIS DIDN'T SEEM TO FIX THE PROBLEM. WHILE THEY WHERE IN THE PROCESS OF BALANCING THE TECH BROKE 2 CENTER CAPS. I WILL SETTING UP AN APPOINTMENT TO HAVE THE DEALERSHIP RECHECK AND ALIGNMENT. I'VE READ REPORTS WHERE THIS HAS BEEN A PROBLEM BEFORE WITH A LOT OF 4 RUNNERS. I'M DISAPPOINTED WITH THE CUSTOMER SERVICE AS WELL THERE. PLEASE HELP ME RESOLVE THIS PROBLEM. I REALLY LOVE THE VEHICLE BUT AT 60-65MPH THE STEERING WHEEL SHAKES AND THE 4RUNNER WANTS TO PULL TO THE RIGHT.

5/9/2021

Steering wheel shimmy and shake from around 55-63mph. Intermittently happens but is very well documented across forums. This affects 4runners that are brand new, and there is no clear answer to a fix.

5/26/2021

8 more complaints are available in this category.

SERVICE BRAKES

5 Reports10% of total

Previewing the first 2 complaint summaries.

On May 27, 2021 The brakes failed on my brand new 2021 Toyota TRD Off-Road Premium 4Runner. I attempted to brake at a stop light, the brake pedal went to the floor and the car did not stop. Luckily no accident occurred and I was able to drive it home (4 miles). No warning lights or messages appeared at all before, during or after the incident. This occurred between 3-4 pm in Custer, SD on Main Street during clear weather. The vehicle was hauled to Toyota dealer in Rapid City, SD the next morning, May 28th. They could not duplicate the issue, brakes appeared to work fine. They found no fluid leaks and no computer trouble codes. Dealer says they can't diagnose and fix it unless they can replicate the issue. I asked how brakes can completely fail and then work fine again - they don't know. After this brake failure I have found several other 4Runner owners who have experienced this same failure, under similar conditions and speeds. Other owners have also submitted incident reports to NHTSA.

6/23/2021

Driving up to 60mph the steering wheel vibrates excessively. I have taken it to the dealer and got repairs to fix it but 2 days later it returned. I had wheels balanced and rotated with an alignment. I fear I will loose control of the suv soon.

2/19/2022

3 more complaints are available in this category.

WHEELS

4 Reports8% of total

Previewing the first 2 complaint summaries.

TIRE PRESSURE WAS 56 PSI ON ALL FOUR TIRES; MEASURED ON THREE DIFFERENT GAUGES. BRIDGESTONE DUELER H/T TIRES WITH WRITING 'NEVER EXCEED 40 PSI'. NEW CAR PURCHASED 13 DAYS AGO.

12/25/2020

I BOUGHT A 2021 4RUNNER LATE APRIL OF 2021. I REPORTED AND SCHEDULED AN APPOINTMENT FOR A BALANCE CHECK. THIS DIDN'T SEEM TO FIX THE PROBLEM. WHILE THEY WHERE IN THE PROCESS OF BALANCING THE TECH BROKE 2 CENTER CAPS. I WILL SETTING UP AN APPOINTMENT TO HAVE THE DEALERSHIP RECHECK AND ALIGNMENT. I'VE READ REPORTS WHERE THIS HAS BEEN A PROBLEM BEFORE WITH A LOT OF 4 RUNNERS. I'M DISAPPOINTED WITH THE CUSTOMER SERVICE AS WELL THERE. PLEASE HELP ME RESOLVE THIS PROBLEM. I REALLY LOVE THE VEHICLE BUT AT 60-65MPH THE STEERING WHEEL SHAKES AND THE 4RUNNER WANTS TO PULL TO THE RIGHT.

5/9/2021

2 more complaints are available in this category.

ELECTRICAL SYSTEM

3 Reports6% of total

Previewing the first 2 complaint summaries.

On 3/30/21 it was discovered that my 2021 4runner with 5500 miles caught fire while parked in my enclosed garage. This event happened while my family and I were sleeping. The fire was discovered @5am at which time the fire department was contacted. The fire was contained to the garage. The vehicle was a total loss and was determined to be the source of the fire that destroyed all of the contents in my garage and significantly damaged the garage structure resulting in a rebuild. The fire department performed an initial investigation, a 3rd party fire investigator performed an investigation, and State Farm along with a representative from Toyota conducted an investigation. Per my claims adjuster, the investigation determined that the fire originated in the vehicle but the exact cause could not be determined due to the damage to the wiring harness and the proximity to the condenser. This incident could have easily lead to significant injury or death to my family. The vehicle had not experienced any issues, no warning lights had indicated an issue, and the only maintenance that had been performed to the vehicle was a tire rotation at 5000 miles at the Toyota dealership.

7/16/2021

Saturday morning July 12th after starting my vehicle, a warning was presented “SRS AIRBAG SYSTEM MALFUNCTION”. I immediately took it to the dealership where they ran diagnostics. The service advisor admitted he nor his mechanic had ever seen anything like that before. They were unable to detect the issue that day. We planned to return the vehicle Thursday July 17. I dropped it off at 10am and never heard from the dealership again that day. Friday, July 18th I contacted the service advisor around 10 am to get an update in which he said they were looking into it. Friday afternoon, I received a call from the service advisor letting me know that the front passenger Occupant ECU had malfunctioned, costing approximately $1000. After researching this, I learned that Toyota has issued many recalls on this issue with other models. I called Toyota headquarters to see how they would rectify this but ended the conversation with no solution other than it is the consumer’s liability. This is a safety issue that should fall back on the manufacturer, especially given the history of recalls issued on this specific defect.

7/18/2025

1 more complaint is available in this category.

VISIBILITY/WIPER

2 Reports4% of total

Previewing the first 2 complaint summaries.

WHILE DRIVING IN A SNOWSTORM ON AN INTERSTATE HIGHWAY AT NIGHT ON 1/25/2021, TWO IMPORTANT SAFETY SYSTEMS FAILED DUE TO ICE AND SNOW BUILDUP ON THE VEHICLE. FAILURE 1: THE PRE COLLISION SYSTEM (PCS) WARNING LIGHT ILLUMINATED INDICATING TEMPORARY FAILURE OF THE PCS SYSTEM (SEE PHOTO 1). THIS WAS DUE TO ICE AND SNOW BUILDUP ON THE FORWARD SENSOR, LOCATED ON THE FRONT GRILLE (SEE PHOTO 2). PROBLEM COULD ONLY BE RECTIFIED BY STOPPING AND PHYSICALLY REMOVING THE ICE BUILDUP, AS REFERENCED IN THE TOYOTA OWNER'S MANUAL, PAGE 252. I RECOMMEND THE SENSOR BE RELOCATED IN FRONT OF THE REAR VIEW MIRROR HIGH ON THE WINDSHIELD, WHERE WINDSHIELD DEFROST AND THE ANGLE OF THE GLASS WILL REDUCE OR ELIMINATE THE BUILDUP. IN THE SHORT TERM, PERHAPS A PLASTIC AIR DEFLECTOR OR SHIELD CAN BE FABRICATED WHICH WILL KEEP ICE FROM INTERFERING WITH THE SENSOR. FAILURE 2: HEADLIGHT HIGH BEAM FAILURE. THE DESIGN OF THE HEADLIGHT COVER FACILITATES ICE BUILDUP OVER THE ENTIRE STRUCTURE (SEE PHOTO 3). SINCE THE HIGH BEAM BULB IS INBOARD AND AFT OF THE LOW BEAM BULB, IT CANNOT PENETRATE THE ICE BUILDUP AT ALL, AND MAKES THE HIGH BEAMS COMPLETELY INEFFECTIVE. WEATHER CONDITIONS WERE: OUTSIDE AIR TEMP: 30 TO 32 DEGREES; NIGHT; HEAVY SNOW; ALTITUDE: 3,000 TO 6,563 FEET.

1/26/2021

I was driving my new car with less than 500 miles on a highway with no other cars around and nothing overhead. It sounded like a gun went off then I could hear the glass falling sliding around on the sunroof shade. The glass was blown outward proving nothing fell and broke it. A Toyota dealers is replacing the sunroof but refuse to accept responsibility and let warranty pay. My 2 year old daughter was in the cover and I’m so thankful I had the sun roof shade closed because glass would have been sprayed over all of us.

8/16/2021

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

2 Reports4% of total

Previewing the first 2 complaint summaries.

WHILE DRIVING IN A SNOWSTORM ON AN INTERSTATE HIGHWAY AT NIGHT ON 1/25/2021, TWO IMPORTANT SAFETY SYSTEMS FAILED DUE TO ICE AND SNOW BUILDUP ON THE VEHICLE. FAILURE 1: THE PRE COLLISION SYSTEM (PCS) WARNING LIGHT ILLUMINATED INDICATING TEMPORARY FAILURE OF THE PCS SYSTEM (SEE PHOTO 1). THIS WAS DUE TO ICE AND SNOW BUILDUP ON THE FORWARD SENSOR, LOCATED ON THE FRONT GRILLE (SEE PHOTO 2). PROBLEM COULD ONLY BE RECTIFIED BY STOPPING AND PHYSICALLY REMOVING THE ICE BUILDUP, AS REFERENCED IN THE TOYOTA OWNER'S MANUAL, PAGE 252. I RECOMMEND THE SENSOR BE RELOCATED IN FRONT OF THE REAR VIEW MIRROR HIGH ON THE WINDSHIELD, WHERE WINDSHIELD DEFROST AND THE ANGLE OF THE GLASS WILL REDUCE OR ELIMINATE THE BUILDUP. IN THE SHORT TERM, PERHAPS A PLASTIC AIR DEFLECTOR OR SHIELD CAN BE FABRICATED WHICH WILL KEEP ICE FROM INTERFERING WITH THE SENSOR. FAILURE 2: HEADLIGHT HIGH BEAM FAILURE. THE DESIGN OF THE HEADLIGHT COVER FACILITATES ICE BUILDUP OVER THE ENTIRE STRUCTURE (SEE PHOTO 3). SINCE THE HIGH BEAM BULB IS INBOARD AND AFT OF THE LOW BEAM BULB, IT CANNOT PENETRATE THE ICE BUILDUP AT ALL, AND MAKES THE HIGH BEAMS COMPLETELY INEFFECTIVE. WEATHER CONDITIONS WERE: OUTSIDE AIR TEMP: 30 TO 32 DEGREES; NIGHT; HEAVY SNOW; ALTITUDE: 3,000 TO 6,563 FEET.

1/26/2021

was going to work on rt 80 east had cruise control on and was getting off exit 45 in new jersey to get bus into manhattan at approx 430 amwhile getting off highway stepped on brakes pedal went to floor tried pumping nothing happened nor did criuise control disengage or collision warning come on a total collapse of system had this car for approx 1 month purchased used at paramus mercedes benz took this vehicle to my mechanic for a full inpection everything was good vehicle had approx 22000 miles on it at purchase lost all control and crashed going off roadway and sliding down bridge abuttment car is a total loss rushed to hospital car was hauled off abutment by wrecker company police fire and ambulance showed up had to break sunroof to get me out no one could belive i survived this happened yesterday feb 3 2023 called toyota corporate and they issued me a claim number as well as my insurance comp looking on line this problem seemed to happen to quite a few people can you please address this issue before more people get injured or worse its only by the grace of god that i am writing this to you this vehicle is now in storage at powder mill collision thankyou

2/4/2023

UNKNOWN OR OTHER

2 Reports4% of total

Previewing the first 2 complaint summaries.

Steering wheel shimmy and shake from around 55-63mph. Intermittently happens but is very well documented across forums. This affects 4runners that are brand new, and there is no clear answer to a fix.

5/26/2021

On 3/30/21 it was discovered that my 2021 4runner with 5500 miles caught fire while parked in my enclosed garage. This event happened while my family and I were sleeping. The fire was discovered @5am at which time the fire department was contacted. The fire was contained to the garage. The vehicle was a total loss and was determined to be the source of the fire that destroyed all of the contents in my garage and significantly damaged the garage structure resulting in a rebuild. The fire department performed an initial investigation, a 3rd party fire investigator performed an investigation, and State Farm along with a representative from Toyota conducted an investigation. Per my claims adjuster, the investigation determined that the fire originated in the vehicle but the exact cause could not be determined due to the damage to the wiring harness and the proximity to the condenser. This incident could have easily lead to significant injury or death to my family. The vehicle had not experienced any issues, no warning lights had indicated an issue, and the only maintenance that had been performed to the vehicle was a tire rotation at 5000 miles at the Toyota dealership.

7/16/2021

EXTERIOR LIGHTING

2 Reports4% of total

Previewing the first 2 complaint summaries.

When carrying cargo, the cutoff of the LED low beam headlamps is shifted upward blinding on coming traffic and dazzling other drivers. This requires the driver to manually adjust the angle of headlight projection under the hood of the vehicle, as there is not automatic system to do so, or even a manual system inside the vehicle. As a result, it’s likely few drivers will do this. Also, it is not possible to manually adjust the headlamps every time the weight in the vehicle shifts. LEDs are particularly bright and affect oncoming traffic. If they are not perfectly aligned at least 50% of the oncoming cars flash their lights at me, many leaving their brights on, probably assuming I am doing the same. Therefore, it’s not just that my vehicle is blinding them, but there is also an element of road rage that comes into play with both drivers becoming dazzled. As such, basic visibility safety at night, should require LED headlamps to all have a self-leveling feature to account for the headlight cutoff angle changing when carrying cargo.

10/2/2021

As the vehicle was traveling on a highway at 35 mph the vehicle shut off electronically three times and powered itself back on after 15 seconds or so of continuous cruising on the highway. Unable to accelerate or control the vehicle while the electronic component shut off in the vehicle. Three days later, a series of warning lights and check engine lights turned on, which has occurred 6 other times, and has been brought to local Toyota dealer multiple times (over six times) and no fix has been conducted to repair the vehicle other than resetting the vehicles ECU. When all of the warning lights turn on, the vehicle loses 2nd gear and juts itself forward and becomes extremely difficult to control to the point where I have almost gotten into life threatening accidents over 4 times. Toyota has acknowledged that they do not know what is wrong with the vehicle and is unsure how to fix it. This is a safety concern that is not getting enough attention and needs to be rectified before someone or myself ends up killing ourselves

3/6/2024

FORWARD COLLISION AVOIDANCE: WARNINGS

1 Report2% of total

Previewing the first 1 complaint summaries.

WHILE DRIVING IN A SNOWSTORM ON AN INTERSTATE HIGHWAY AT NIGHT ON 1/25/2021, TWO IMPORTANT SAFETY SYSTEMS FAILED DUE TO ICE AND SNOW BUILDUP ON THE VEHICLE. FAILURE 1: THE PRE COLLISION SYSTEM (PCS) WARNING LIGHT ILLUMINATED INDICATING TEMPORARY FAILURE OF THE PCS SYSTEM (SEE PHOTO 1). THIS WAS DUE TO ICE AND SNOW BUILDUP ON THE FORWARD SENSOR, LOCATED ON THE FRONT GRILLE (SEE PHOTO 2). PROBLEM COULD ONLY BE RECTIFIED BY STOPPING AND PHYSICALLY REMOVING THE ICE BUILDUP, AS REFERENCED IN THE TOYOTA OWNER'S MANUAL, PAGE 252. I RECOMMEND THE SENSOR BE RELOCATED IN FRONT OF THE REAR VIEW MIRROR HIGH ON THE WINDSHIELD, WHERE WINDSHIELD DEFROST AND THE ANGLE OF THE GLASS WILL REDUCE OR ELIMINATE THE BUILDUP. IN THE SHORT TERM, PERHAPS A PLASTIC AIR DEFLECTOR OR SHIELD CAN BE FABRICATED WHICH WILL KEEP ICE FROM INTERFERING WITH THE SENSOR. FAILURE 2: HEADLIGHT HIGH BEAM FAILURE. THE DESIGN OF THE HEADLIGHT COVER FACILITATES ICE BUILDUP OVER THE ENTIRE STRUCTURE (SEE PHOTO 3). SINCE THE HIGH BEAM BULB IS INBOARD AND AFT OF THE LOW BEAM BULB, IT CANNOT PENETRATE THE ICE BUILDUP AT ALL, AND MAKES THE HIGH BEAMS COMPLETELY INEFFECTIVE. WEATHER CONDITIONS WERE: OUTSIDE AIR TEMP: 30 TO 32 DEGREES; NIGHT; HEAVY SNOW; ALTITUDE: 3,000 TO 6,563 FEET.

1/26/2021

VISIBILITY:SUN/MOON ROOF ASSEMBLY

1 Report2% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Toyota 4Runner. The contact stated while driving approximately 70 MPH, the sunroof exploded, sending glass inside the cabin of the vehicle. The vehicle was taken to a local dealer where it was diagnosed with needing the sunroof to be replaced however, the vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 2,800.

1/20/2022

TIRES

1 Report2% of total

Previewing the first 1 complaint summaries.

Yokohama 245/60r20 Geolander G96 that came with my brand new 2021 Toyota 4Runner Limited I purchased in December 2020. Over the last several weeks every 7 to 10 days I have needed to put air in all 4 tires. Then I was driving on a smooth paved street arriving at work my low pressure warning light came on. I got out and had a flat tire. I found the inner sidewall failed at only 28,000 miles. I didn’t hit anything on the road, or hit a curb etc. just normal driving on paved roads. Putting on the spare I took my 4Runner to the Toyota dealership a few miles away. The service technician at our local Toyota dealer today stated they, “are seeing this issue as a common problem with this particular tire on Toyota 4Runners in our Colorado Cold climate, is causing the rubber to become excessively brittle. Even with normal use, the smallest stones/sand used in our highway plows/sanding trucks cause catastrophic premature tire failure. They may be fine for use in California warm clients but not here in Colorado.” This explains why recently every 7 to 10 days I have needed to put additional air in all 4 tires. The rubber is prematurely becoming brittle/rot in cold weather thus not properly sealing the air. The technician recommended going with 4 new tires from a different manufacturer, stating the problem will continue with the other 3 Yokohama tires and likely a new Yokohama tire as well. He agreed the tire should be recalled as this is unacceptable especially for a tire with a M+S (mud and snow rating), only 28,000 miles on and properly taken care of. At $400+ per tire this is a huge expense and clearly a HUGE safety issue in cold climates. In cold weather having to refill tires with air every 7 to 10 days is a real hassle as well. Good thing I have my own air compressor at home. I only drive with the correct air pressure per my owners manual as stated on my drivers door. The Toyota dealer drew a white chalk square around the tire failure area.

11/19/2022

VEHICLE SPEED CONTROL

1 Report2% of total

Previewing the first 1 complaint summaries.

was going to work on rt 80 east had cruise control on and was getting off exit 45 in new jersey to get bus into manhattan at approx 430 amwhile getting off highway stepped on brakes pedal went to floor tried pumping nothing happened nor did criuise control disengage or collision warning come on a total collapse of system had this car for approx 1 month purchased used at paramus mercedes benz took this vehicle to my mechanic for a full inpection everything was good vehicle had approx 22000 miles on it at purchase lost all control and crashed going off roadway and sliding down bridge abuttment car is a total loss rushed to hospital car was hauled off abutment by wrecker company police fire and ambulance showed up had to break sunroof to get me out no one could belive i survived this happened yesterday feb 3 2023 called toyota corporate and they issued me a claim number as well as my insurance comp looking on line this problem seemed to happen to quite a few people can you please address this issue before more people get injured or worse its only by the grace of god that i am writing this to you this vehicle is now in storage at powder mill collision thankyou

2/4/2023

POWER TRAIN

1 Report2% of total

Previewing the first 1 complaint summaries.

As the vehicle was traveling on a highway at 35 mph the vehicle shut off electronically three times and powered itself back on after 15 seconds or so of continuous cruising on the highway. Unable to accelerate or control the vehicle while the electronic component shut off in the vehicle. Three days later, a series of warning lights and check engine lights turned on, which has occurred 6 other times, and has been brought to local Toyota dealer multiple times (over six times) and no fix has been conducted to repair the vehicle other than resetting the vehicles ECU. When all of the warning lights turn on, the vehicle loses 2nd gear and juts itself forward and becomes extremely difficult to control to the point where I have almost gotten into life threatening accidents over 4 times. Toyota has acknowledged that they do not know what is wrong with the vehicle and is unsure how to fix it. This is a safety concern that is not getting enough attention and needs to be rectified before someone or myself ends up killing ourselves

3/6/2024

AIR BAGS

1 Report2% of total

Previewing the first 1 complaint summaries.

Saturday morning July 12th after starting my vehicle, a warning was presented “SRS AIRBAG SYSTEM MALFUNCTION”. I immediately took it to the dealership where they ran diagnostics. The service advisor admitted he nor his mechanic had ever seen anything like that before. They were unable to detect the issue that day. We planned to return the vehicle Thursday July 17. I dropped it off at 10am and never heard from the dealership again that day. Friday, July 18th I contacted the service advisor around 10 am to get an update in which he said they were looking into it. Friday afternoon, I received a call from the service advisor letting me know that the front passenger Occupant ECU had malfunctioned, costing approximately $1000. After researching this, I learned that Toyota has issued many recalls on this issue with other models. I called Toyota headquarters to see how they would rectify this but ended the conversation with no solution other than it is the consumer’s liability. This is a safety issue that should fall back on the manufacturer, especially given the history of recalls issued on this specific defect.

7/18/2025

SEATS

1 Report2% of total

Previewing the first 1 complaint summaries.

Saturday morning July 12th after starting my vehicle, a warning was presented “SRS AIRBAG SYSTEM MALFUNCTION”. I immediately took it to the dealership where they ran diagnostics. The service advisor admitted he nor his mechanic had ever seen anything like that before. They were unable to detect the issue that day. We planned to return the vehicle Thursday July 17. I dropped it off at 10am and never heard from the dealership again that day. Friday, July 18th I contacted the service advisor around 10 am to get an update in which he said they were looking into it. Friday afternoon, I received a call from the service advisor letting me know that the front passenger Occupant ECU had malfunctioned, costing approximately $1000. After researching this, I learned that Toyota has issued many recalls on this issue with other models. I called Toyota headquarters to see how they would rectify this but ended the conversation with no solution other than it is the consumer’s liability. This is a safety issue that should fall back on the manufacturer, especially given the history of recalls issued on this specific defect.

7/18/2025

FUEL/PROPULSION SYSTEM

1 Report2% of total

Previewing the first 1 complaint summaries.

Vehicle was diagnosed from a mechanic with no fuel pressure due to not starting. Vehicle has approximately 135,000 miles and had no warnings or indications of problem. It appears when VIN was ran on gov. recall that Honda had issues with fuel pump. Vehicle will be inspected by Toyota dealer.

12/10/2025

About This Data

Data and Methodology

MethodologyHow we score →

Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.

FAQ

What are the most common owner complaints for the 2021 Toyota 4Runner?

The most reported complaint category for the 2021 Toyota 4Runner is STEERING, with 11 owner reports. That is about 22% of all complaints logged here. Other recurring themes include STEERING, SUSPENSION, SERVICE BRAKES.

Are complaints about the 2021 Toyota 4Runner a serious warning sign?

Potentially. 31 complaint reports fall into higher-attention systems such as brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components. That does not prove every vehicle has a defect, but repeated complaints in those systems justify a more careful pre-purchase inspection.

How should buyers use complaint data for the 2021 Toyota 4Runner?

Use complaints as an early pattern to investigate, not a standalone verdict. Start with the top complaint categories, compare those themes against the recall report and maintenance guide, then inspect service records for evidence that the same problem areas were already addressed. If the same issue appears repeatedly across complaints and recalls, treat it as a real ownership-risk flag.

Are complaints about the 2021 Toyota 4Runner severe?

31 complaint reports involve higher-attention systems such as brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components, which is enough to justify a focused inspection before purchase.

Complaint list entries are sourced from owner-submitted NHTSA ODI records.

Read complaint summaries

Toyota 4Runner: How should complaint data influence buying decisions?

Use complaint patterns together with recalls and maintenance guidance to estimate ownership risk and inspection priorities.

Carfocal links complaint data directly to recall and maintenance routes for the same model year.

Return to full vehicle report
Complaint entries
49
Top-topic view
5 grouped topics shown
Primary source
NHTSA ODI owner complaint records

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In this guide

  1. 01Overview
  2. 02Common Problems
  3. 03Owner Complaints
  4. 04Data and Methodology

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