2017 TOYOTA SIENNA Power Train Problems

In July of 2025 my 2017 Sienna started making a whine noise. Took it to mechanic and he stated it was likely coming from transmission but recommended we take it to Toyota dealership to confirm. So we took it to Toyota and sure enough they said the transmission was failing. They said it was due to high mileage but it only had just over 150,000 at time of incident. After doing some research on line and talking with other Sienna owners I believe our Sienna should fall under the UA-80 recall.

The transmission started making a whining sound. There is a Toyota customer support bulletin pol19-04 that mentions this issue however the dealer says this car is not covered

The contact owns a 2017 Toyota Sienna. The contact stated that while starting the vehicle, reversing, and then while driving 20 MPH, there was an abnormal whining sound coming from the front of the vehicle. A dealer was contacted. The vehicle was taken to the dealer and was currently being diagnosed. The vehicle was not repaired. The contact related the failure to Technical Service Bulletin: TSB-0160-18 (Transaxle Whine Noise, Harsh Shift, MIL ON, or Reduced Power); however, the VIN was not included in the bulletin. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 120,000.

My 2017 Sienna has whine noise coming from transmission, the vehicle was inspected by Toyota dealership and confirmed that the noise is coming from Transmission. Toyota has already issued a recall for the 2017 Sienna with Transmission UA80 under program ZJC. My vehicle has the same issue, however, it is not being covered as it is UA80E. This issue seems common among all the 2017 model irrespective of transmission number. However, Toyota is not providing support to all customer and have limited to a only one transmission number.

The contact owns a 2017 Toyota Sienna. The contact stated that while driving approximately 30-40 MPH and releasing the accelerator pedal, the vehicle made an abnormal whining sound that progressively became louder. The vehicle was taken to the dealer, where it was diagnosed, and it was determined that the transmission needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was notified of the failure and denied assistance in covering the cost of the repair. The failure mileage was approximately 136,000

The contact owns a 2017 Toyota Sienna. The contact stated that while driving at an undisclosed speed and attempting to accelerate, the vehicle briefly hesitated before shifting hard into gear. The contact stated that after the failure, there was an abnormal whining sound coming from underneath the vehicle. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who was unable to provide a specific diagnosis for the cause of the failure; however, the contact was informed that there were known issues with the transmission of similar vehicles. The vehicle was not repaired. After investigating the failure, the contact related the failure to the Customer Support Program Bulletin: ZJC. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 40,000.

My 2017 Toyota sienna has a whine noise coming from the transmission. Brought it to the dealer I have done everything at for this van and they say it’s the transmission and it will cost more than it’s worth. There’s a CSP-zjc but my vin isn’t on there. It’s presenting the same exact problem as the CSP. Unbelievably, Toyota CARES isn’t doing a “good will” service fix. Very disappointed in their customer service

My transmission (UA80e) has started to steady whining noise when driving and has some choppiness when changing gears. The local Toyota dealership is recommending full replacement, the dealership said it is out of warranty. Toyota headquarters released a Customer Support Bulletin ZJC in 2019 covering this issue for the next 10 years, but they are saying they will not cover it under this bulletin even though my model year, transmission and symptoms all match the described issue.

We have started to experience the transmission whine at that is specified in Toyota's CSP ZJC documentation. We took our vehicle into our local Toyota Dealership Service Center and they confirmed that the whine was a transmission issue and that the only course of action to take would be to replace the transmission. Our vehicle was manufactured in the specified window (manufacture date 10/2016, manufacture data window from the program 7/2016-2/2018), it has the specified transmission model (UA80), we are within the coverage window stated in the support materials (within ten years of first use), we are experiencing the same transmission symptoms described in the program support materials (whining transmission noise), and we have been recommended by our local Toyota Service members to replace the transmission. From this information, it appears that we meet the criteria and are suffering the same issues as are referenced in the ZJC materials, but...

Transmission failure. The dealer confirmed the issue and was repaired at an independent shop. There are no warning lights and only audible sounds that caused us to have it checked out. This appears to be a more widespread problem as Toyota did issue a TSB for a subset of VINs of this model year.

Pressure Control Soleneoid "A" Prformance stuck oof -P0746. Second opionin: Valve bddy Assembly clutch kits inside transmission. Toyota of Dallas refuse to provide service. I had done Tranmission service done by them . Need to get it fix van with new transmission installed and correct any other recall of 2025 to be fix.

after hearing wining noise from transmission as driving down highway at full speed with out warning car suddenly and quit violently came to a stop . no waring lights ! transmission appears to be in two gears at once reverse and forward will only roll if put in neutral .internal failure in the transmission according to the dealer . The car not included in the recall issued for the same year make and model for the same thing. extremely dangerous wife and kids in the car when it happened.

While trying to accelerate on an onramp to the highway, the transmission failed to enter into higher gear, and the check engine light came on. The 2017 Sienna currently sits at 112,951 miles. Leading up to this, we had noticed the van jolting when being put into drive or reverse, and acceleration was often sluggish, with a whirring sound. Inspection by the local Toyota dealership found that the entire transmission needed to be replaced. The serial number of the transmission starts with UA02, which wasn't part of any of the existing 2017 Sienna service bulletins.

The contact owns a 2017 Toyota Sienna. The contact stated while driving at an undisclosed speed, the contact became aware of a hard shift and a high-pitched whining sound while the transmission was shifting. The vehicle was taken to an independent mechanic where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. In addition, the contact was informed that the repair was not covered under recall. The failure mileage was approximately 110,000.

On Sunday, [XXX] (at 78,793 miles), our MY17 Sienna XLE AWD suddenly displayed a Malfunction Indicator Lamp (MIL) and a message advising "Check AWD System". The vehicle disabled its cruise control system and AWD system, and no longer displays the Eco indicator when traveling at constant speeds on flat terrain. There was no obvious change to vehicle shifting behavior; the shifting has always been sluggish and occasionally "hangs" at higher RPM before downshifting. There were no symptoms or MILs prior to this incident. We consider AWD to be a safety feature when driving with snow or rain, and we frequently traverse Box Elder Canyon where the summit is nearly 6K feet above sea level. We stopped by an auto parts store (O'Reilly) where they pulled codes from the OBD-II sensor. Their reader showed 3 codes: P2714, P0741, and P2757). The vehicle is currently at Young Toyota in Logan, UT. Young...

Mi toyota sienna 2017 se le daño la transmision con 62,000 milla de uso. Estaba transitado por la carretera aproximadamente a 40 milla por hora, cuando de repente pegó freno y se detuvo. Por poco provocó un accidente. La lleve a la toyota y me dice que es transmision. Pero me informaron que no era su problema. Estuve averiguado este problema y varios me dijero que ese era un problema común en esta guagua. Para mi esto es un problema de fábrica Se supone que lo arregle sin costo. Estoy en lo correcto o no

I was driving and suddenly the 2017 Toyota Siena just lost all acceleration. The car no longer could move in gear. I put car into reverse or drive or any other gear and the vehicle would not move. The engine was on. The parking brake was not on. The transmission seems to have had a major malfunction. I had to have my car towed and my enitre family was stranded. I then looked up tranmission issues and found that 2017 Toyotas have a serious tranmission issue under “ Certain 2017 to 2018 Model Year Toyota Sienna Certain 2017 to 2018 Model Year Toyota Highlander Coverage for UA80 Transmission Customer Support Program ZJC”. I have approx 35000 miles on this vehicle and I bought it close to used from a Kingston Prestige Toyota dealership in New York State.

Parked the car on an incline (our driveway) like we have a 100 times before. Went inside to unload groceries. Came back to the car and from the passenger seat reached over to press the auto-off button. When that was pressed the car started to roll down our driveway with our daughter in the back seat. It rolled across the street, hit the side of our neighbors house, and landed in the woods. My wife sustained major injuries to her arms, legs, hands, and back. She was also 9 months pregnant. Toyota dealership says there's nothing wrong after a 30 minute inspection.

The contact owns a 2017 Toyota Sienna. The contact stated while driving 60 MPH with her four children in the rear seats, the vehicle started jerking and decelerated independently. Additionally, the transmission was slipping. There was no warning light illuminated. The contact continued driving; however, the transmission continuously slipped out of gear. The vehicle was towed to the dealer where it was diagnosed that the failure was associated with Toyota UA80 Transmission program. The dealer contacted the manufacturer who agreed to cover the repair of the vehicle. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was approximately 45,000.

The contact owns a 2017 Toyota Sienna. The contact stated while driving 35 MPH and coming to a stop, the brake pedal was depressed but failed to respond. There were no warning lights illuminated. The contact stated the brake pedal was rigid. The contact stated the failure reoccurred while driving. The brake warning light and traction control warning light were illuminated. The vehicle was taken to the dealer who could not determine the cause of the failure. The dealer advised the contact to take the vehicle back to the dealer she purchased the vehicle. The manufacturer was made aware of the failure and referred the contact to the dealer who sold her the vehicle. The vehicle was not repaired. The approximate failure mileage was 14,500.

HISTORY: PERIODICALLY OVER THE LIFE OF THE VEHICLE, WHEN I PUSH DOWN ON THE GAS PEDDLE THE CAR IS UNRESPONSIVE OR RESPONDS IN FITS AND STARTS. THIS IS USUALLY UPON STARTUP AFTER STOPPING AT A STOP SIGN OR LIGHT. BUT IT DID HAPPEN IN MAY OF 2019 AT 65MPH ON THE FREEWAY (GOING STRAIGHT), RESULTING IN SUDDEN DECELERATION. AS I MOVED OVER LANES TO GET TO THE SIDE OF THE ROAD, THERE WAS A SUDDEN JOLT AND THE CAR BEGAN FUNCTIONING NORMALLY. ON SUNDAY 9/22/19 AT 10AM I LEFT MY HOME WITH MY DAUGHTER TO GO TO THE MOVIES. LESS THAN 5 MINUTES FROM OUR HOME, IN OUR FLAT NEIGHBORHOOD GOING 25MPH, I STOPPED AT THE STOP SIGN THEN ATTEMPTED TO ACCELERATE THROUGH THE INTERSECTION. THE CAR WENT A FEW FEET INTO THE INTERSECTION AND THEN WOULDN'T MOVE, THE ENGINE MAKING A WHIRRING SOUND. IT WAS IN DRIVE. I TURNED...

VAN WERE ON A SLIGHT SLOPE DRIVEWAY WITH ENGINE STILL TURN ON AND SHIFT IN PARK. WHEN TURN THE ENGINE OFF, THE VAN ROLE BACKWARD INTO THE STREET. THIS COULD BE A RESULT OF GEAR SHIFT OUT OF PARK. IT IS A AUTOMATIC TRANSMISSION.

ISSUE STARTED AT ABOUT 4100 MILES. THE VAN WOULD NOT START AT ALL. THE PUSH BUTTON WOULD ACT AS OF THE VAN WOULD START BUT NOTHING WOULD HAPPEN. AFTER TRYING 5 PLUS TIMES IT STARTED. TOOK THE VAN TO THE DEALER THAT STATED EVERYTHING LOOKED GOOD. NOW ABOUT TWO WEEKS AGO THE SAME ISSUE OCCURED. THE VAN WOULD DISPLAY CHECK CHARGING SYSTEM ON THE DISPLAY AND THE VAN WOULD NOT START NO WOULD THE SIDE DOORS OPEN IN ORDER FOR ME TO GET MY INFANT'S OUT OF THE VAN. AFTER MULTIPLE ATTEMPTS THE VAN GOING AGAIN IT STARTED AND I WAS ON MY WAY. CONTACT TOYOTA TO INFORM THEM AND SO FAR THEY HAVE NOT CONTACTED ME BACK AS WELL AS THE DEALER.

JULY 22 2018 AFTERNOON. I WAS DRIVING THE SIENNA 2017 ON A HIGHWAY IN SPEED 70MPH IN THE ECT MODE WITH MY WIFE AND KIDS. IT SEEMED EVERYTHING NORMAL AT THE BEGINNING. WHEN I WAS PRESSING GAS PEDAL THE CAR DID NOT ACCELERATE AT ALL. ON THE CONTRARY, THE MINI-VAN WAS SLOWING DOWN. I BECAME NERVOUS SINCE THAT WAS A 3 LANES HIGHWAY, I WAS IN LEFTIST LANE AND THERE WAS NARROW CUBE AND DID NOT HAVE ENOUGH SPACE TO STOP. I PRESSED GAS PEDAL HARDER, AND ENGINE GOT TO 6000 RPM HOWEVER THERE WAS NO POWER AT ALL. WHAT MADE ME MORE NERVOUS WAS THAT THE DISPLAY DID NOT SHOW THE TRANSMISSION INDICATOR AT ALL. THE DISPLAY SUPPOSES ALWAYS SHOW THE TRANSMISSION INDICATOR SUCH AS P/N/D'. HOWEVER, AT THAT TIME THE DISPLAY DID NOT SHOW ANY OF THAT, THE DISPLAY AREA WAS BLANK. I ALSO PULLED THE SHIFT HANDLER...

TL* THE CONTACT OWNS A 2017 TOYOTA SIENNA. WHILE DEPRESSING THE ACCELERATOR PEDAL AFTER A STOP, THERE WAS A HARD JERK AND THE RPMS INCREASED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT STATED THAT THE FAILURE WAS AN ONGOING ISSUE WITH THE VEHICLE EVER SINCE IT WAS PURCHASED. THE MIRACLE TOYOTA (37048 US-27, HAINES CITY, FL 33844, (863) 956-1123) STATED THAT THE VEHICLE HAD TRANSMISSION FAILURE, WHICH WOULD DISAPPEAR AFTER DRIVING THE VEHICLE FOR AWHILE. WHILE THE CONTACT'S WIFE WAS DRIVING THE VEHICLE, A LOUD WHINING NOISE WAS HEARD. THE CONTACT'S WIFE WAS ABLE TO TURN OFF AND RESTART THE VEHICLE. AFTER A FEW MINUTES, THE NOISE DISAPPEARED. THE CONTACT RESEARCHED THE FAILURE ONLINE AND FOUND A TSB ISSUED BY TOYOTA FOR A SOFTWARE UPDATE. THE VEHICLE WAS TAKEN TO MIRACLE TOYOTA (37048 US-27, HAINES CITY, FL 33844, (863) 956-1123) WHERE IT WAS DIAGNOSED WITH NEEDING THE SOFTWARE UPDATED...

TL* THE CONTACT OWNS A 2017 TOYOTA SIENNA. WHILE DRIVING 35 MPH, THE RPMS REVVED INDEPENDENTLY AND THE TRANSMISSION SEIZED WITHOUT WARNING. THE VEHICLE WAS TOWED TO SHEEHY TOYOTA OF FREDERICKSBURG (3507 JEFFERSON DAVIS HWY, FREDERICKSBURG, VA 22408, (540) 507-0076) WHERE IT WAS DIAGNOSED THAT A SOFTWARE FAILURE CAUSED THE TRANSMISSION TO SELECT AN IMPROPER GEAR WHILE THE VEHICLE WAS ALREADY IN THE APPROPRIATE DRIVE GEAR. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND PROVIDED CASE NUMBER: 171130377. THE APPROXIMATE FAILURE MILEAGE WAS 14,000.

2017 TOYOTA SIENNA. CONSUMER WRITES IN REGARDS TO TRANSMISSION ISSUES. *LD CONSUMER SENT ADDITIONAL CORRESPONDENCE. *LD THE CONSUMER STATED THE STEERING WAS IMPRECISE. THE VEHICLE WANDERED ON THE ROAD. THE HEATER/AC FAN HAD AN ANNOYING NOISE. THE VEHICLE WOULD NOT ACCELERATE IMMEDIATELY UPON DEPRESSING THE PEDAL. THE TRANSMISSION WOULD CONSTANTLY SHIFT UP AND DOWN ON VERY SMALL HIGHWAY INCLINES. *JS