2017 Toyota Sienna Problems

I, as well as other owners of 2017–2018 Toyota Highlanders and 2017–2018 Siennas are experiencing serious transmission issues—including high-pitched whining, erratic shifting, clunks, hesitation, and premature failure. My 2017 Toyota Sienna has the UA80 8-speed automatic transmission at issue and started whining upon acceleration in March/April 2026 timeframe. It has always had the clunking and hesitation problem. According to Gears Magazine, the issue stems from a flawed assembly process involving the counter drive gear support. A locking tab meant to secure a vital retaining nut was not bent properly during factory assembly. This leads to gear movement, internal wear, whining, and eventually failure. Unknown to me, in 2019, Toyota had acknowledged the problem in Technical Service Bulletins T-SB-0160-18, T-SB-0008-21, which only go to dealers, and implemented a limited Customer Support Program (CSP ZJC)—but only offered coverage to a narrow group of VINs, not to all VINs for model years that have these transmissions. My car is experiencing these same symptoms. My Toyota Dealer confirmed this problem and recommended a transmission replacement for $11,000 including labor. They said my VIN was not included in the Customer Support Program. Driving with a failing transmission is highly dangerous. A bad transmission can cause sudden power loss causing the car to halt to a sudden stop, unintended acceleration, or my car might get stuck in neutral while driving. I could lose control or be unable to get to the shoulder on the highway, cause a rear-end collision, or get stuck in busy traffic. DESIRED OUTCOME REQUEST: My VIN should be covered under the Customer Support Program in the category of cars that are “less than 10 years old regardless of mileage” or a full recall of all VINs of these model years with these transmissions should be executed. Thank you.

I have a 2017 Toyota Sienna XLE with about 120k miles on it. Out of nowhere the transmission was gear hunting and surging. It eventually became impossible to get it above 30 mph. It seemed like the transmission just went haywire. No lights on the dash let me know anything was wrong. Thankfully I had just pulled off the highway. Otherwise it could've been bad. I couldn't drive it safely so I had it towed to the nearest Toyota dealership. They said that the transmission needed to be replaced. $9k....

power sliding door (behind front passenger) does not fully engage arresting hook and tends to immediately return to open position and after hitting the button again starts welling. It started about eight months ago. Now it isn’t connected at all, I just open or close it and it slides but don’t try to open it first if it’s locked or the alarm blares. I may have pulled or pushed it too many times trying to open or close it so I could drive the car. Looks like others have had the same issue with their driver side passenger door too.

I was driving around 30 MPH when the vehicle suddenly turned off. The engine stopped running, all instrumentation turned off, no power steering and no brakes. The car became uncontrollable until it coasted to a stop.

While driving at speed, the vehicle suffered a sudden and complete loss of engine power and stalled in traffic. The vehicle was diagnosed by an independent mechanic who found a failed factory-installed Denso fuel pump module. This failure mirrors Toyota Safety Recall 20TA02 (NHTSA Campaign 20V012) for the exact same model year 2017 Toyota Sienna, but my specific VIN is currently excluded from the recall list. The un-recalled defective component created an immediate highway safety hazard as me and my family were left stranded in the middle of the road. We waited for hours at the risk of oncoming traffic until we were able to have a tow truck lift the van and take to the nearest repair facility (an independent service center - Goodyear Auto Service). The repair facility diagnosed the problem and confirmed that the fuel pump failed to generate enough pressure causing the vehicle to stall and not start again. To correct the problem, the fuel pump was replaced with an OEM toyota fuel pump module assembly.

October of 2024 my van stalled while I was driving. The van was towed to an auto shop. The shop suspected a battery & alternator so replaced it. Later that same week I filled my tank at Delta Sonic and immediately proceeded to the car wash. My van stalled in the car wash. Once I was pushed out I had it towed again. I drove it for a few weeks and filled up the tank at Delta Sonic but this time the van didn’t start at all. Towed the van again. Shop thinks my issue is resolved- did a complete check of everything & returned my van to me. A week or so goes by and I filled my tank late at night and it wouldn’t start after fill up. A tow was not available. Scared and frustrated I called multiple people for help. Two hours pass, before I try to start the van again. It starts. Now I am starting to correlate a fuel fill up with my van not starting after re-fueling. My safety and my grandchild’s safety was jeopardized when my van stalled while driving in an extremely busy roadway. The next time, Multiple people had to push me out of the car wash and the last time I was forced to sit at gas pumps waiting for help. I stop filling my tank to full and take the van to Toyota. They confirmed the fuel pump was the issue and fixed it.

on July 3rd, traveling on highway to airport tire blew out (right rear). Pulled to side of road and attempted assistance but this was friday afternoon before july 4th holiday, NOTHING was going to happen except a tow - possible wait as long as 2-3 hours. reportedly the Sienna has drive flat (50 miles at 50 mph) We drove 5 mph for approx 3 to 4 miles to tire store/Les Schwab. Flat was replaced but then on inspection ALL remaining tires had card showing wear on inner tires. ALL 4 (including the blowout). Pictures submitted . Of particular concern is that we had taken the vehicle about 10 K prior (March)specifically for tire wobble noise and to fix alignment. Wear was noted, but no safety concerns raised and no cautionary recommendations offered. When we brought the vehicle and tires to the dealer AFTER the blowout we were told by service manager that the early wear was a known problem to occur specifically on the all wheel Siennas. Again, NO CAUTIONARY ADVICE GIVEN in March despite recognized wear and this known history. We had a blowout in heavy holiday traffic at 60 mph less than 10K /3month later. This easily could have been catastrophic. We reported to Toyota to a "Beth" at customer documentation and risk reduction department who did an excellent job of deflecting causation/potential blame and advised us to contact the tire manufacturer or the dealer. Absolutely no evidence of concern for safety - ours or those around us - at highway speeds. Review of web shows known problem, service manager volunteered it to be a known problem of premature wear, with service given shortly before incident WITHOUT GUIDANCE. "Beth" told us she would document our concerns but that there was nothing Toyota could do or would do other than documenting. I am hopeful you can investigate further and initiate some reparative process before there is a preventable catastrophe much like the Prius accelerator problem. we will send copies of to wherever is useful

THE BRIDGESTONE RUN FLAT TYRES ON MY TOYOTA SIENNA 2017 AWD HAS WORN OUT IN 24,000 MILES. THESE ARE THE FACTORY TYRES AND WHEN THE DEALER SOLD THE CAR TO US, THEY SAID IT COMES WITH WARRANTY . BUT IT SEEMS THAT IS NOT THE CASE. KINDLY HELP. THESE TYRES ARE EXPENSIVE AND IF I HAVE TO CHANGE IT AROUND 20,000 MILES, ITS TOO MUCH. ALL WE USE THE CAR IS TO DROP OFF KIDS TO SCHOOL AND THEIR SPORTING EVENTS. WE NEVER TOOK THE VAN IN BAD ROADS. *TR

Whining noise upon acceleration

Subject: Safety Defect Complaint – 2017 Toyota Sienna (VIN: [XXX] ) Dear NHTSA Safety Division, I am submitting a safety complaint regarding my 2017 Toyota Sienna, VIN [XXX] . In June 2023, while traveling on I-81 South in Virginia with my family of seven, the van stalled suddenly and emitted white smoke from under the hood, then the engine completely failed. The vehicle had only 111,000 miles. The repair would have cost $15,000, and I had to sell the van in 2024 for $4,000, suffering significant financial loss. Toyota informed me no recall applies to my VIN, although many 2017 Siennas experienced fuel pump failures causing stalling. As a person with disability and serious health issues, this incident caused extreme stress, hardship, and risk to my family. I request that NHTSA investigate this potential safety defect to determine whether other 2017 Siennas are affected. Sincerely, Your Name Phone Number Address INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The drivers side sliding door when on the power on, it will either not catch when opening or not shut when you are trying to shut it. You can be in the door way and it will shut on you by itself. You have to physically stop it or pull it shut. I have taken it in the past to the local Toyota dealership, when it was under warranty, multiple times. They don't see anything wrong, or cannot explain it but have replaced the sensor multiple times. It will be ok for a while and then start again. I sometimes wonder if cold weather affects it but there is no rhythm or reason to it. I am scared to have children or my parents use this door and if I turn off the power to it, it is very hard to use the door because it is so heavy. There are no warning lights, messages, or signals of any kind.

Today I had a crash and luckily walked away. I went down an embankment at speed into trees where the vehicle rolled and struck trees head on. All the vehicle airbags deployed and vehicle came to rest on the drivers side. Although there was electrical power and the engine still running none of the right side doors would open and neither would the rear hatch which was clear of obstruction! Had there been a fire I wouldn't be making this report! Doors need to be operable regardless of situation when none of them are jammed from an accident!

This has happened multiple times. Driving at various speeds. Sometimes driving straight other times turning. ABS activates with out cause. ESC light illuminates. Happens when in traffic causing the van to try to stop in traffic without warning. Thus far mechanic has not been able to duplicate.

At 70000 miles and around 9/1/2023, started to notice our brake stop suddenly steep down pedal when braking at 45mph or higher. Problem starts after fuel pump replacement recall completed by dealership August 2023. Check recall and campaign program, my vehicle VIN specifically not on the recall list for brake booster vacuum pump. I thinks Toyota HQ should take my vehicle into consideration since my vehicle is a 2017 Sienna. Contact HQ they refused to offer to diagnosis nor help replace if applicable. Due to your vin not on the recall, your on your expense.

Today 4/7/23 My 2017 Toyota Sienna accelerated on its own. I was driving my 4 children to school and we were at a stop light. When I took my foot of the brake to start making a turn the car gunned it around the corner. It scared everyone in the car half to death. Thankfully no one was hurt but it looks like others on here haven't been so lucky with this issue. I hope toyota does the right thing a d fixes this issue before more people die.

Wire harness section which controls the Parking Collision Warning and Rear Cross Traffic Warning is frayed, causing failure. This failure was determined by the dealer to be caused by mud packing into the rear bumper cavity. Dealer wanted over $1,000 to fix. Denied warranty, due to the cause being "an outside influence". There is no way to effectively wash the inside of the bumper without removing the bumper. If I pay for a new wire harness, the issue will re-occur. This poses an elevated risk to my family and any occupants of the vehicle, as key safety features must be disabled.

I was driving around 30 MPH when the vehicle suddenly turned off. The engine stopped running, all instrumentation turned off, no power steering and no brakes. The car became uncontrollable until it coasted to a stop.

Unknown, Steering wheel turns several inches when you engage the steering wheel lock. Causes the steering wheel to be off centered. Which in turn cause the alignment not centered. Dealer confirmed that it needs a steering shaft replacement.

The contact owns a 2017 Toyota Sienna. The contact stated that while driving approximately 65 MPH, the third-row driver’s side window suddenly shattered causing shards of glass to enter the vehicle. The cause of the failure was not determined. No object had contacted the vehicle to cause the failure. The local dealer and manufacturer were not yet contacted. The approximate failure mileage was 41,000.

TL* THE CONTACT OWNS A 2017 TOYOTA SIENNA. THE CONTACT STATED THAT WHILE THE VEHICLE WAS PARKED AND UNATTENDED, THERE WAS AN ABNORMAL POPPING SOUND DETECTED. THE CONTACT'S NEIGHBOR NOTICED THAT THE REAR WINDSHIELD WAS CRACKED, WITHOUT IMPACT. THE CONTACT CALLED WALSER TOYOTA (4401 AMERICAN BLVD W, BLOOMINGTON, MN 55437, (612) 294-0220) AND WAS REFERRED TO A GLASS COMPANY. THE VEHICLE WAS NOT YET REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 46,500.

Purchased used vehicle from a Toyota Dealership on or about March 27, 2021. The dashboard illumination on the 2017 Toyota Sienna only appears to operate when the vehicle is turned on AND the front headlight selector is moved to the on or automatic mode. I do not believe it is a standard feature for any vehicle to NOT illuminate the dashboard without the headlights being turned on. Issue: With no illumination of the tachometer and speedometer these items are nearly impossible to see. That naturally forces the human eye to remain looking down slightly longer than normal which can possibly result in an accident. If it is a sunny day with no need for headlights this issue is now exacerbated because the bright sunlight often causes drivers to wear tinted or dark sunglasses rendering the dashboard nearly 100% black. So, my question is a simple one: On the 2017 Toyota Sienna, with the standard feature set included as indicated under VIN - [XXX], should the dashboard lights illuminating the tachometer and speedometer areas turn on immediately and automatically when the vehicle is started? On the vehicle, the dashboard lighting only turn on when the headlights are turned on or set in the auto-headlight mode…both of which are not my choice. I want see my dashboard data automatically and without having to drive with my headlights turned on. This is a poor dashboard visibility standard for this make, model and year Sienna. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

CANNOT SEE SPEEDOMETER IN DAYTIME UNLESS HEADLIGHTS ARE TURNED ON. BOUGHT NEW AND TOOK BACK TO DEALER BUT . HE COULD NOLT GET ANY BACK LIGHTING. SPEEDOMETER HAS BLACK BACKGROUND.

The drivers side sliding door when on the power on, it will either not catch when opening or not shut when you are trying to shut it. You can be in the door way and it will shut on you by itself. You have to physically stop it or pull it shut. I have taken it in the past to the local Toyota dealership, when it was under warranty, multiple times. They don't see anything wrong, or cannot explain it but have replaced the sensor multiple times. It will be ok for a while and then start again. I sometimes wonder if cold weather affects it but there is no rhythm or reason to it. I am scared to have children or my parents use this door and if I turn off the power to it, it is very hard to use the door because it is so heavy. There are no warning lights, messages, or signals of any kind.

TL* THE CONTACT OWNS A 2017 TOYOTA SIENNA. WHILE THE VEHICLE WAS PARKED ON AN INCLINE, THE PASSENGER SIDE SLIDING DOOR OPENED AND FAILED TO LATCH. AS A RESULT, THE DOOR RETRACTED WHILE THE CONTACT'S ARM WAS STILL INSIDE THE VEHICLE. THE CONTACT MANAGED TO JERK HER ARM OUT OF THE VEHICLE, BUT SUSTAINED BRUISES AND SCRAPES TO THE ARM. MEDICAL ATTENTION WAS NOT RECEIVED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT TOOK THE VEHICLE TO TOYOTA OF NORTH CHARLOTTE (13429 STATESVILLE RD, HUNTERSVILLE, NC 28078, (704) 875-9199) AND A SERVICE APPOINTMENT WAS SCHEDULED FOR SEPTEMBER 6, 2019. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 45,397.

The contact owned a 2017 Toyota Sienna. The contact stated that while driving alone at 70 MPH and attempting not to hit tire tread in the road, she crashed into the median, her vehicle drove into a ditch, the vehicle spun twice, and then crashed head-on into a tree where it came to a stop. The driver's side air bags did not deploy, but the passenger air bags deployed when there was no occupant seated. The contact sustained neck and back injuries, and medical attention was sought via the hospital. A police report was filed, but it was not available at this time. The vehicle was towed to a tow lot. The manufacturer was not notified of the failure. The failure mileage was 216,000.

On [XXX], I was involved in a car accident in Saint John, Indiana, while driving my 2017 Toyota Sienna. The vehicle was hit on the passenger side, but none of the airbags deployed. As a result, I sustained serious injuries including cervical disc herniations, nerve compression, and ongoing pain. Since then, I’ve been unable to perform daily tasks, drive, care for my children, or work as I did before. I confirmed with Toyota that my vehicle has no active recalls, including for airbags, yet this failure occurred. There were no warning lights or messages prior to the incident. The airbag system has not yet been inspected or confirmed defective by a service center, but I am willing to make the vehicle available for inspection if needed. I am requesting that NHTSA investigate this failure, as it may represent a serious safety defect that could affect others driving the same model. I can provide supporting documentation, including medical records, police report, and photos of the vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

2nd row passenger side seat belt receptacle is not latching seat belt. The contact stated that a replacement part was ordered but not needed. It was discovered that the original part had debris inside and was cleaned out. The original part started working again and a repair was no longer needed.

REAR SEAT BELT WOULD NOT LOOSEN. IT ONLY TIGHTEN UP TRAPPING CHILD IN SEAT. THE ENGINE WAS TURNED OFF AND VEHICLE WAS IN PARK. NOTE I DON'T REMEMBER EXACT DATE BUT APPROXIMATE DATE.

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.

I BOUGHT NEW 2017 TOYOTA SIENNA AWD XLE. I NOTICED IN FIRST MONTH THAT STEERING WHEEL STARTED PULLING LEFT. TOOK THE VAN FOR ALIGNMENT BUT NEVER GOT FIXED. NOW I HAVE 25000 MILES TIRES ROTATION DEALERSHIP TOLD ME THAT MY TIRES ARE MORE WEARING INSIDE THAN OUTSIDE. AND IT'S NOT SAFE ON THE ROADS. I HAVE 4 KIDS THAT WE USE THIS VAN FOR DAILY TRANSPORTATION. I DON'T FEEL SAFE ON THE ROAD WITH MYSELF AND MY FAMILY.

2017 SIENNA - 16886 MILES. FIRESTONE TIRES STARTED WEARING THIN AT 16,462 MILES. WAS TOLD TOYOTA DOES NOT HANDLE THAT. CALLED FIRESTONE AND WAS TOLD TO GO TO CORPORATE STORE. WAS TOLD AT FIRESTONE STORE TIRES WERE AT 5/32 AND NOTHING THEY COULD DO BECAUSE TIRES WERE NOT AT 4/32. CONCERNED BECAUSE FAMILY CAR, TIRES SHOULD NOT START TO WEAR AT LESS THAN 17,000 MILES. AT 16,886 MILES WHILE MY WIFE WAS DRIVING DOWN THE CITY ROAD AT 40 MPH, 2 FIRESTONE TIRES BLEW OUT. MY CONCERN IS MORE TIRES ARE ON ROAD AND THERE HAS TO BE A PROBLEM WITH THAT BATCH OF TIRES. FIRESTONE STILL WILL NOT SAY THEY ARE IN WRONG.

EXCESSIVE TIRE WEAR ON OUTER EDGES. TIRES WERE ROTATED EVERY 5,000 MILES OR SO, AFTER 20,000 TIRES WERE VERY WORN. REPLACED AT 30,000, WHICH WAS ACTUALLY WAY PAST WHAT WAS SAFE FOR THEM. NOW, WITH MICHELIN DEFENDERS, AN ALIGNMENT UPON INSTALLATION (WHICH DID NOT SHOW ANYTHING), AND PROPER TIRE PRESSURE AT 4500 MILES, SAME WEAR IS HAPPENING. TOYOTA'S RESPONSE WAS THAT IT IS A HEAVY VEHICLE. WHAT IS IT: TIRES ARE FALSELY LABELED FOR HIGHER MILAGE THAN THEY GET OR ARE THE SIENNA TIRES NOT THE APPROPRIATE SIZE FOR THE WEIGHT OF THE VEHICLE? ATTACHED PHOTOS: FRONT WEAR AT 4500 MILES AS COMPARED TO BACK TIRE AND ORIGINAL TIRES AT 30,000.