Owners have reported 2 crashes and 6 injuries to NHTSA for the 2024 Toyota Sienna. These are unverified owner reports, not confirmed defect rates.
Owner complaints11
UNKNOWN OR OTHER
Owners of the 2024 Toyota Sienna report several issues, with a notable number of complaints about the sunroof unexpectedly exploding, described as a loud pop or sound similar to a gunshot. Additionally, there are instances of sudden acceleration during braking, particularly when driving downhill, and a concerning report of the vehicle stalling and losing power on the freeway, accompanied by warning messages about charge and fluid. Some owners also mention problems with the vehicle's gear recognition, affecting the operation of power side doors and the rear tailgate. Safety implications include potential loss of control due to acceleration issues, stalling in traffic, and the risk of injury from the sunroof glass. These issues occur at various mileage ranges and timeframes, with no clear pattern in the reported timelines.
Owner complaints9
SERVICE BRAKES
Owners of the 2024 Toyota Sienna frequently report issues with unintended acceleration or surging when braking, particularly at low speeds or when coming to a stop. Symptoms described include the vehicle unexpectedly jolting forward, requiring drivers to apply additional braking force. These issues are often intermittent and have been reported to occur within the first few thousand miles of ownership. Safety implications are significant, with one reported crash resulting in two injuries when the brakes failed to stop the vehicle as intended. Prospective buyers should be aware of these recurring braking performance problems that may affect driving safety.
Severity signals: 1 crash, 0 fire, 2 injury reports
Owner complaints4
SEATS
Owners report issues with the 2024 Toyota Sienna's seats, particularly with the third-row seats not locking securely in the stowed position. Complaints frequently mention that these seats can bounce or shift when driving over speed bumps or during sudden stops, potentially leading to them becoming unsecured. Additionally, one owner describes the second-row seat moving freely along its track when a lever is pulled, resulting in an injury during abrupt braking. The safety implications include the risk of seats or objects hitting passengers, as well as potential injury due to the seats not remaining secured. These issues are noted without specific mileage references, suggesting they may not be tied to vehicle age or use.
Severity signals: 0 crash, 0 fire, 1 injury reports
Owner complaints4
VEHICLE SPEED CONTROL
Owners of the 2024 Toyota Sienna report issues with unintended acceleration and throttle response problems, particularly at low speeds. Complaints frequently mention the vehicle surging forward when brakes are applied, with one owner experiencing a crash as a result. Another common issue involves the forward collision avoidance system potentially cutting off throttle control, leaving the vehicle unresponsive in traffic. These problems are noted by owners with approximately 11,000 miles on their vehicles, and no warning messages or lights are typically displayed. Safety implications include the risk of crashes and loss of control, which are significant for potential buyers to consider.
Severity signals: 1 crash, 0 fire, 0 injury reports
Owner complaints4
STRUCTURE
Owners of the 2024 Toyota Sienna report issues primarily with the trunk and sliding doors. Commonly described symptoms include the trunk door failing to close properly, randomly opening, and requiring manual force to shut, with some owners mentioning a screeching sound. One owner reports that the lift gate strut bent and exploded, posing a potential safety risk, while another owner describes a power sliding door failing to detect an obstruction, resulting in an injury. These issues are noted from the time of purchase and persist over extended periods, with some owners experiencing them across multiple service visits. Safety implications include the risk of injury from door malfunctions and exploding components.
Severity signals: 0 crash, 0 fire, 1 injury reports
Owner complaints3
TIRES
Owners of the 2024 Toyota Sienna report issues primarily related to tire integrity. Complaints frequently mention sidewall bulging in Firestone Destination LE3 tires (size P235/65R17), with multiple tires reportedly developing noticeable bulges shortly after installation. This problem has been confirmed by several service centers and affects both the original and replacement sets. Another owner reports a low tire pressure warning, which was attributed to possible weather influences, occurring at approximately 17,826 miles. The sidewall bulging presents a risk of sudden tire failure and potential loss of vehicle control, though no incidents of crashes or loss of control have been reported. Used car buyers should be aware of these tire-related issues when considering this model.
Owner complaints2
ENGINE
Owners of the 2024 Toyota Sienna report issues related to engine performance. One owner describes the vehicle unexpectedly stopping for 2-3 seconds while driving in city conditions, with the power returning after repeated pressing of the gas pedal. This issue has occurred multiple times. Another owner mentions the need for a complete engine replacement due to an unspecified appearance-related issue, expressing concerns about potential depreciation. These complaints occur within the first few months of ownership, but no specific mileage is provided. No crashes, fires, or loss of control are reported in these instances.
Owner complaints2
POWER TRAIN
Owners report issues with the 2024 Toyota Sienna's power train, particularly involving a temporary loss of throttle response. Complaints frequently mention that when attempting to accelerate from a stop or low speed, the vehicle does not respond to the accelerator pedal for 2-3 seconds. This symptom occurs without any warning lights on the dashboard. The issues are noted in vehicles with varying mileage, including one report at 68,000 miles. The lack of immediate acceleration poses a potential safety risk, especially in situations involving oncoming traffic.
Owner complaints2
VISIBILITY/WIPER
Owners of the 2024 Toyota Sienna report issues with the driver-side exterior mirror wobbling, particularly noticeable on bumpy roads and at highway speeds. This wobbling results in distorted images, making it challenging to assess surrounding traffic, and is exacerbated at night or in rainy conditions due to blurred lights. Some owners have had replacement mirrors installed, but the issue persists, and dealerships often describe the movement as normal. Additionally, one owner notes a wavy appearance in the vehicle's windshield, affecting visibility. These complaints typically arise at low mileage, with one vehicle reported at 6,500 miles. Safety implications include potential difficulty in maintaining awareness of surrounding vehicles, but no crashes or loss of control are reported.
