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Unexplained acceleration during braking which has caused the vehicle to appear to accelerate further during braking actions causing driver to apple brakes harder

TOYOTA SIENNA HYBRID 2024 POWER TRAIN

Rear Tail Lights Failed... Brake and Signals work.  This was repaired through the dealership. 4 connectors and housing replaced invoice shows part 909890-10942.   I am writing to express my concern regarding repeated tail light failures on my black Toyota Sienna that appear to be caused by wiring connection issues. This defect creates a serious safety hazard for my family, other motorists, and pedestrians, particularly in rural areas where there is little to no street lighting.  I live in the country, where many roads are unlit and visibility at night is already limited. Because my vehicle is black, it blends into the darkness when the tail lights fail. Drivers approaching from behind may not realize my vehicle is on the road until it is too late to stop safely, significantly increasing the risk of rear-end collisions.  This issue is especially concerning because I frequently transport children in my vehicle. Their safety depends on other drivers being able to clearly see my vehicle at night. A tail light failure caused by a wiring defect could place them at unnecessary risk of serious injury or death if another vehicle is unable to see us in time.  The defect also puts other drivers at risk. Motorists traveling at highway speeds on dark rural roads rely on tail lights to judge the presence, distance, and speed of vehicles ahead. Without functioning tail lights, they may have little or no warning that another vehicle is in their lane, particularly around curves, hills, or during poor weather conditions.  This appears to be more than a routine bulb replacement issue. If the root cause is an unreliable wiring connection, the lights may work intermittently or fail unexpectedly, making it difficult for owners to recognize the problem before driving. An intermittent electrical failure is especially dangerous because drivers may believe their lights are operating normally when they are not.  Started a case with Toyota  260715001670

TOYOTA SIENNA HYBRID 2024 EXTERIOR LIGHTING

When approaching a stop sign or light and while the brake is already engaged the car will accelerate lunging the car forward from 3-10ft while driver maintains the same pressure on the break pedal.

TOYOTA SIENNA HYBRID 2024 SERVICE BRAKES

The power liftgate on my 2024 Toyota Sienna consistently fails to complete a full close-and-latch cycle. When activated, the liftgate begins its closing sequence normally but then aborts the cycle during the final stages of latching. The system emits an audible beeping signal and the liftgate reverses direction, reopening approximately one-quarter of the way. This failure occurs repeatedly when the vehicle is stationary with no external obstruction present. Multiple repeated attempts to close the liftgate using standard operation (key fob, interior switch, and exterior switch) result in the same failure pattern. The system does not complete a secure latch. Eventually, the liftgate can only be fully closed manually with physical force, bypassing the powered closing function entirely.  This condition occurs intermittently at times but has become frequent and repeatable enough to prevent reliable use of the power liftgate system. No obstructions are present during operation. The local Toyota dealership service department observed this and indicated a lift gate adjustment is required, noting it is a known issue  Toyota Customer Care has indicated they have no documented record of a known defect relating to this condition. However, multiple independent owner reports and dealer-level discussions indicate similar behavior may be occurring in other vehicles of the same model line, suggesting a potential systemic issue that may not yet be formally recognized.  This malfunction raises potential safety concerns, including but not limited to: failure of the rear liftgate to fully secure and latch, increased risk of the liftgate remaining partially open or unlatched without clear driver awareness, and reliance on manual force to override an electronic safety system designed for automatic secure closure.  I request that this complaint be documented for investigation and review to determine whether a defect trend exists in the power liftgate system of the Toyota Sienna platform.

TOYOTA SIENNA HYBRID 2024 STRUCTURE:BODY:HATCHBACK/LIFTGATE

While applying the brake at the stop light. (25 to30 mile speed limit zone) The Toyota hybrid sienna start to accelerate for split 5 or more seconds.  I have to apply the brake harder even though I was already applying the brake to slow down because the light was red and the are several cars in front of me.  For the first time I was scared thinking about rear ending some one  in front of me or the Toyota Lexus incident where it accelerated and everyone died flashing through my mind.  It was not a good feeling.

TOYOTA SIENNA HYBRID 2024 UNKNOWN OR OTHER

2024 Toyota Sienna AWD — vehicle data sourced from FuelEconomy.gov.

The 2024 Toyota Sienna AWD is a safe and reliable minivan designed for families. Its hybrid powertrain delivers impressive fuel efficiency, making it a practical choice for daily commutes and longer journeys.

	2011	2012	2013	2014	2015	2016	2024
Price	—	—	—	—	—	—	$36,885–$60,000
Engine Capacity	3.5 litre3456 cc(210.898 cu in)	3.5L	3.5L	3.5L	3.5L	3.5L	2.5 L
Fuel Type	Petrol	Regular	Regular	Regular	Regular	Regular	Regular
Transmission	6 speed automatic	Automatic (S6)	Automatic (S6)	Automatic (S6)	Automatic (S6)	Automatic (S6)	eCVT
Body Type	7/8 Seater Multi-Purpose Vehicle	Minivan - 4WD	Minivan - 4WD	Minivan - 4WD	Minivan - 4WD	Minivan - 4WD	Minivan

Toyota Sienna AWD (2024) Specifications