2023 Toyota 4Runner

New, strange noise started in Dec'25 (41K miles; 2yrs 9 months). No warning lights. Diagnosed as failed brake accumulator (first at an independent shop, later at the dealer). Apparently the accumulator is part of the full master cylinder assembly which must be replaced. Toyota has quoted $3,200 to complete this repair and is telling me it must be out of pocket.

NHTSA ID

11739260

Incident

Dec 28, 2025

I was driving the vehicle and suddenly the steering wheel started to getting hard to turn it and the dash board doesn’t show any failure I went right away to dealership close by they inspected the vehicle they states there is a power steering failure but the car never showed any failure on dashboard or safety system

NHTSA ID

11721837

Incident

Feb 23, 2026

Windshield cracked approximately 2” from the bottom all the way across while using the defroster to clear ice from it. I was still parked at the time. I am unsure how long it will stay water tight or become worse. One concern is the crash avoidance and the automatic high beam sensor are both attached to the windshield and don’t want them to fail. I also don’t want the entire piece of glass to shatter and land in my lap while driving. The dealer refused honoring the repair under warranty. They only use one particular repair shop (which I suspect they own) and even quoted me a price for replacing the ruined glass. In addition to paying for that I would need to pay the dealer to recalibrate the crash avoidance and headlight sensor. I have yet to report the damage to my insurance. As of yet there are no warning lights showing.

NHTSA ID

11716332

Incident

Jan 31, 2026

The contact owned a 2023 Toyota 4Runner. The contact stated that while her father was driving under 30 MPH on a side road, the driver swerved to miss a deer. The vehicle drove off a hill, rolled over and landed on its top, and all the seat belts simultaneously unbuckled, causing all the passengers to hit their heads against the roof simultaneously. Additionally, the contact noticed an abnormal fuel odor. The contact stated that she was unable to exit the vehicle. The contact's brother assisted the contact in exiting the vehicle, and all passengers were able to exit the vehicle. The vehicle then caught on fire. The fire department arrived at the scene, but it was unknown whether the fire was extinguished by the fire department. The origin of the fire was unknown. A police report was filed. It was unknown whether the air bags deployed. The vehicle was towed and deemed a total loss. The contact sustained neck and back pain, bruises and headaches. The contact stated that the headaches could be due to an impact on the brain cyst in the back of the contact's head. The contact's son sustained neck pain, back pain and bruises. The contact's brother and father sustained unknown injuries. All the passengers went to the hospital the following day and were still receiving medical assistance. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 10,000.

NHTSA ID

11715551

Incident

Dec 28, 2023

Mileage

10,000 mi

the rear manual tailgate has opened 3 times while the vehicle was at highway speeds and the doors would be locked. the latest incident happened on 1-30-26, at highway speed (70mph) the tailgate opened completely without warning. the indicator on the dash did light up and an alarm did sound. I had been on the road approximately 10 miles without incident before that. this was the third time this happened, although the first two the door did not completely open, only became unlatched but stayed shut. all three times were mornings that were extremely cold. (below -1 F) each time i made sure there was no ice or snow or other object in the way of securely closing the tailgate. even if there were, the door would not be closed from the onset and the dash warning should have indicated the door was not completely latched.

NHTSA ID

11714444

Incident

Jan 30, 2026

Started driving on the freeway when we heard something on the roof of the car and when I opened the moonroof cover from inside the car I could see that the entire moonroof had shattered. All the glass was flying off the car and onto the freeway.

NHTSA ID

11682974

Incident

Aug 25, 2025

After adjusting the vehicle lock sound level in the settings, it completely disabled my key fobs and the panic function on the key fob. Had to take to dealer to fix. Dealer had never seen the issue before. Been reported online many many times. Dealers and Toyota refuse to acknowledge a known issue.

NHTSA ID

11680482

Incident

Aug 13, 2025

Component: Tire – Dunlop Grandtrek AT20 P265/70R17 Vehicle: 2023 Toyota 4Runner (approx. 25,000 miles) After a standard tire rotation, I began experiencing severe steering wheel vibration (flutter) at highway speeds (55–65+ mph) and during braking. The issue started immediately after rotation and has not gone away, even after returning the tires to their original positions. The dealer replaced rotors and pads, but the vibration remained. There are no warning lights, and no visible tire damage. This condition has been reproduced by the dealer. Upon researching, I found that Toyota issued Tech Tip T-TT-0602-20 for this exact issue — citing steering vibration caused by Dunlop Grandtrek AT20 tires on 4Runner models. I also found similar complaints from other owners on forums and the NHTSA database. The issue appears to be related to internal tire defects (e.g., belt separation or out-of-round tires) which are not externally visible. This problem affects safety due to potential loss of steering stability at high speeds, and could worsen over time. Tires have not been replaced yet, but I plan to pursue road force balancing and a manufacturer warranty inspection. I'm glad that I was able to find this problem early before it cause tire explosion. Tire Size: P265/70R17 Tire Brand/Model: Dunlop Grandtrek AT20

NHTSA ID

11668391

Incident

Jun 21, 2025

OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.

Customers state Parking Brake efficiency concerns. The conditions can include the following: • The Parking Brake Pedal feels loose or requires full depression for proper engagement. • When not fully depressed, effectiveness on steep surfaces may be reduced, allowing the vehicle to roll with transmission in Neutral. • When not fully depressed, effectiveness on steep surfaces may be reduced, allowing the vehicle to roll slightly with transmission in Park.

Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software.

Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Service Bulletin is to provide general guidelines and procedures for odor remediation. This Service Bulletin provides a guide on how to prepare and treat the interior of the vehicle for odor remediation. Refer to the applicable model and model year Repair Manual and the EPA (Environmental Protection Agency) website for the most up-to-date safety and precautionary guidelines.

Customers state Parking Brake efficiency concerns. The conditions can include the following: • The PKB Pedal feels loose or requires full depression for proper engagement. • Ineffective on steep surfaces, allowing the vehicle to roll with transmission in Neutral. • Ineffective on steep surfaces, allowing the vehicle to roll slightly with transmission in Park. [Transmission Dependency]

The 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 Bulletin aid in locating, inspecting, and repairing refrigerant leaks.