12 problems related to automatic transmission have been reported for the 2005 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Toyota Sienna based on all problems reported for the 2005 Sienna.
The contact owns a 2005 Toyota Sienna van. The failure mileage was 700 and the current mileage was 51000. There is a transmission delay with his vehicle that is constant, and occurs when driving between 6-10 mph. The dealer called it hunting for a gear. The vehicle has been to the dealer 6 times since a month after purchasing the vehicle for this problem; however the dealer has been unable to repair the vehicle.
Hesitation when downshifting to 1st, then when trying to accelerate it feels as if nothing is going to happen so you give it more accelerator and then it accelerates too fast, mostly noticeable as you turn a corner.
The vehicle exhibits unpredictable acceleration. When the acceleration is pressed there is a delay of several seconds before the vehicle responds resulting in an unsafe situation.
: the contact stated the vehicle had difficulty switching gears and caused acceleration issues. The service dealer stated the computer system adjusted to the driver and this was a normal function. However, the contact stated the gears did not shift properly. Updated 10/18/2006 - the vehicle would hesitate when picking up speed. The check engine light illuminated. The dealer found code for evap purge valve. The technician found the vacuum lines off at intake.
When accelerating from 5-10 mph, van hesitates and then jerks forward trying to find correct gear or catch up. This is especially dangerous on snow/ice. Took to local dealer 3 times and was told all of Toyota's 5-speed transmissions do this and my Sienna wasn't as bad as others. The dealership did reprogram computer and I could tell no difference. I was told there was nothing else they could or /would do. I complained to Toyota headquarters and still got nowhere.
2005 Toyota Sienna. Consumer states problems with transmission response. The first encounter the consumer had with the dealer with regards to the transmission was poor programming. So, the dealer re-calibrated the ecm. However, the transmission continued to hesitate before shifting up or down. The problem was most noticeable when slowing down.
On my 2005 Sienna xle limited awd, I have noticed at 50+ miles an hour interstate or even downhill) that the car feels like there is excessive rolling resistance, and if I don;t accelerate, very soon it downshifts (have noticed this even on a downhill slope at 45 miles a hour). Service advisor said all Toyota cars as designed to downshift as soon as you take your foot from the pedal (something which sounds very strange to me, since I'm driving other makes and models as well). Seems the transmission is not tuned well. On a separate matter, I noticed several times that the car hesitates to accelerate for a few seconds when I push the accelerator a bit harder at very low speeds, such as when I need to merge into heavy traffic from a side road. It also happened when I needed to change the lanes from a very slow moving lane to one where I needed to accelerate rapidly. Again, something feels wrong about the transmission.
: the contact stated while driving 15mph or less, the automatic transmission shifted into neutral. Although the gearshift was not visibly seen changing gears, the vehicle was physically felt shifting down and loosing momentum. The vehicle was seen by the local dealer. The dealer reprogrammed the computer, but the problem persisted. The dealer was unable to determine how to remedy the problem.
Contact owns a 2005 Toyota Sienna. The vehicle has severe hesitation, almost impossible to drive the vehicle on a wet road or on a snowy road. Gas pedal and transmission do not seem to connect. No crashes. No police reports. No fires. The vehicle has been to Toyota dealer 5 times; the mechanic came back and said they found nothing wrong with vehicle. (11/08/05) the transmission would down shift very harsh on turns and on hills. The service dealer placed an upgraded computer in the vehicle but the problem worsened.
2005 Sienna le auto transmission will not downshift properly at slowing / low speeds. Feels like shifts into neutral at times. Has been checked by dealer every 5,000 mile oil change with same answer - nothing found.
Toyota 2005 Sienna Mini van xle fwd - accelerating from low speed roll (around 5 to 10 mph) the car essentially experiences a stalling condition where it will not accelerate for a few seconds. More gas pedal depression results in a sudden occasionally almost uncontrollable acceleration.
Hesitation when accelerating. Particularly when already rolling at less than 5 miles an hour.