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6.7

fairly significant
Typical Repair Cost:
$3,000.00
Average Mileage:
36,380 miles
Total Complaints:
15 complaints

Most Common Solutions:

  1. not sure (15 reports)
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2007 Toyota Sienna transmission problems

transmission problem

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2007 Toyota Sienna Owner Comments

problem #15

Aug 122011

Sienna LE 3.5L V6

  • Automatic transmission
  • 53,000 miles

A D V E R T I S E M E N T S

I bought the van as a used vehicle, within a month of driving, especially when the engine is cold and in slow speeds,

I noticed this problem, ie: engine losing power, so that the transmission has to down shift abruptly.

- , Dumont, NJ, USA

problem #14

May 012013

Sienna 3.5L V6

  • Automatic transmission
  • 75,000 miles

The car lost power when slowing down. It's got slipping gears in the lower speed. There is no help when I called Toyota customer service.

- , Cerritos, CA, USA

problem #13

Dec 302011

Sienna SE

  • Automatic transmission
  • 68,400 miles

This one is so annoying I think if I put something up here about it, I'll blow up instead of going off. When this vehicle slows down with you it just freaking slow, you can get back on the speed as quick as you want. Ridiculous.

- , Bridgeport, CT, USA

problem #12

May 032012

Sienna

  • Automatic transmission
  • 66,550 miles

A D V E R T I S E M E N T S

when slowing down with my 07 Sienna i have no power to go....engine sounds like a Diesel when Cold .... took Van in with Toyota Dealer ...they said nothing wrong with it ...Talked to Toyota ...they said same thing ...nothing they can do for me ...i know i`m not the only one with the problems on the 2007 Sienna..so i made a Complaint with NTSH @ www.arfc.org or 1888-327-4236...i hope we can get this fixed....Lets all do a Complaint with NTSH....

- , FArgo, ND, USA

problem #11

Nov 092010

Sienna LE 3.5L

  • Automatic transmission
  • 42,000 miles

I am experiencing the same problem as most of the other explained here that loss of power when slowing, sounds like exhaust breaking. I am due to go to the dealer and I just checked in the web if anybody else is experiencing the issue.

- , Calgary, AB, Canada

problem #10

Apr 242008

Sienna CE

  • Automatic transmission
  • 14,890 miles

We took the car in for the third time, but to a different dealer. We asked them to check the transmission problem, but they said on their invoice, "Could not verify concern. Tech road tested and no problems were found at this time. Check transmission fluid-normal, found no trouble codes, road tested-could not verify concern." We asked one more time to go on record as saying we don't agree. We're now at 45000+ miles and it still does it.

- , Houston, TX, USA

problem #9

Sep 012007

Sienna CE

  • Automatic transmission
  • 4,901 miles

A D V E R T I S E M E N T S

This was the second time we had taken the car back to the dealer for the transmission issue. The invoice says, "Customer states when you go over a speed bump or a 90 degree, trans tries to down shift while reving way to high c/s. Has gotten worse since last service. Test drove and trans is normal at this time. Customer rode with Tom." Again, they make it sound as if we agree that nothing is wrong which is not true. Again, we asked to be put on record as stating that there is something wrong with this transmission. It shouldn't be doing this. We don't care what Toyota says.

- , Houston, TX, USA

problem #8

Jun 222007

Sienna CE

  • Automatic transmission
  • 1,384 miles

We noticed that the transmission felt weird right away. Whenever we go over speed bumps or turn the corner (times when we normally slow down and then speed up), the transmission revs. It reminds me of when I was driving a standard transmission and working the clutch wrong. The dealer mechanic's invoice says, "Customer states trans is slipping when you slow down and go over a speed bump then when you speed up trans slips. Test drove many times and also with customer and trans is shifting fine at this time." The wording of this makes it sound as if we agreed that there was nothing wrong. Not true. We requested that we go on record that we feel there is something wrong with this transmission even though they say it's fine.

- , Houston, TX, USA

problem #7

Aug 042008

Sienna LE 3.5L

  • Automatic transmission
  • 19,000 miles

After taking it to the Irvine Toyota and getting the Toyota Corp involved still the same answer. their computer does not show any fault on this car. We should all get together and sue Toyota for this . Please if interested in doing so email me. We can fix this if we all get united.

- , Mission, CA, USA

problem #6

Dec 012007

Sienna LE 3.5L V6

  • Automatic transmission
  • 18,000 miles

After purchasing our Toyota Mini Van we noticed a slip or delay in the tranmission right away. We took it to the Toyota dealership and were told they needed to reset the memory, and that it should fix our problem. they Explained that our Van has a memory tranmission and wouldn't slip or delay once it memorized our driving patterns. This did not in anyway fix the problem.. We have taken it in several, several times and complained that we feel this is a dangerous problem... The Transmission slips so badly that it actually has locked my seatbeat when it finally caught and accelerated. Toyota has stood by this problem explaining that the van is driving exactly the way it was designed to do.. I

- , Indianapolis, IN, USA

problem #5

Dec 012007

Sienna LE 3.5L V6

  • Automatic transmission
  • 18,000 miles

A D V E R T I S E M E N T S

After purchasing our mini van we noticed right away that we had a problem with our transmission.. Transmission does not shift gears when you slow down without stopping. We took it to toyota dealership and were told that they needed to reset the transmission and that would fix the problem. That in NO WAY fixed the problem.. They told us this van has a memory transmission and would correct on its own after it learned our driving patterns. This is unreal answer.. We have complained many many times,that we feel this is a dangerous flaw in the design but are continually told there is nothing wrong with the transmission, that it is operating exactly the way it was designed. The transmission has slipped so badly that It locked my seatbelt when it finally catches.. When ever you slow down ( going around curve or parking lot) without coming to a complete stop you can hear the tranmission winding up and whining then it will suddenly jerk into the next gear..Because I can get NO help from Toyota on this matter I am trading this hunk of crap in and NEVER again will I ever buy a Toyota again...

- , Indianapolis, IN, USA

problem #4

Jan 212008

Sienna

  • Automatic transmission
  • 29,521 miles

We have been annoyed by a transmission problem which the service department at Toyota has been unable to correct. The technicians made an earnest attempt to solve the problem but have no solution to offer other than it being a design problem. The problem occurs when the vehicle decelerates from a higher gear then upon accelerating the transmission doesn't seem to find the appropriate lower gear and instead slides or slips between gears until it "catches". There's an uncomfortable hesitation and temporary loss of acceleration which could result in an accident.

- , Sarasota, FL, USA

problem #3

Feb 082008

Sienna

  • Automatic transmission
  • 30,156 miles

The transmission slips or slides after decelerating then returning to power. It cannot seem to find the correct gear and instead suddenly catches when the engine revs high enough. A service call was made a year earlier when the first attempt to correct the slip was to reset the memory and then drive the car as we would in normal traffic. Apparently the computer would reprogram the transmission's shifting range according to our particular driving style. This sounded plausible but resulted in no change. We were told after the second service call that the problem had been corrected in newer models but could not be fixed in ours.

- , Sarasota, FL, USA

problem #2

Jun 252009

Sienna

  • Automatic transmission
  • 59,891 miles

This was our third service call to report that Sienna's transmission shifts with an annoying and dangerous slip then jerk at lower speeds. The service invoice shows that the technician recorded this as a "Bad ECU and to reprogram the ECU". Once again, after the third attempt, there was no change in the performance of the transmission and the technician genuinely seemed to be as frustrated as we were. I'm wondering if the two vehicles reporting problems in this area are unique of if there are more. A recall is unlikely if there aren't enough owners reporting this. We've obviously reported the problem to Toyota but maybe it will help if "AutoBeef" steps in as an independent player?

- , Sarasota, FL, USA

problem #1

Sep 012008

Sienna LX 3.5L V6

  • Automatic transmission
  • 45,000 miles

I purchased car for itís reputation for being the best minivan for a family. Lately, I have taken the Sienna to the dealership three times. Problem: Reducing speed to make either a right or left turn the car just won't accelerate. You can hear the motor literally forced. I had a car recently almost smack me from behind because the car just stalls and won't run the way it's suppose to. The first visit apparently the transmission had to be checked and corrected. Second visit memory lost and had to leave it at the shop so a Toyota mechanic could come over and reboot. Third, apparently nothing seemed wrong with it placed in diagnostic machine and no problems were detected. Today thinking of calling the dealership to have it checked again. Iím just not happy with the way itís behaving. Itís making me believe I will get into an accident because of this defect . :(

- , Sicklerville, NJ, USA

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