2014 Toyota Sienna problems

ELECTRICAL SYSTEM

Sluggish start when hot - fuel pump leak into engine when hot, causing starter issues, wears out starter, causes other stress on engine. Common issue in Toyota Siennas. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11748426 — an unverified report by a vehicle owner.

ENGINE

Sluggish start when hot - fuel pump leak into engine when hot, causing starter issues, wears out starter, causes other stress on engine. Common issue in Toyota Siennas. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11748426 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Sluggish start when hot - fuel pump leak into engine when hot, causing starter issues, wears out starter, causes other stress on engine. Common issue in Toyota Siennas. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11748426 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

The contact owns a 2014 Toyota Sienna. The contact stated that while driving at various speeds the vehicle had experienced unintended acceleration. During the failure the driver forcely pressed the brake pedal to stop the vehicle. The contact indicated that the failure had once occurred while a transporting a Uber passenger. The cause of the failure was not determined. The manufacturer and local dealer were not contacted. The failure mileage was 120,000.

NHTSA complaint #11736476 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER

Odometer Fraud. The contact purchased a 2014 Toyota Sienna. The contact discovered a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of the purchase, the mileage was 59,500. It was later discovered upon checking the paperwork that the mileage was 176,047.

NHTSA complaint #11727469 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

The vehicle died while driving and when I try to start again it will crank but can't start.

NHTSA complaint #11719245 — an unverified report by a vehicle owner.

AIR BAGS

Dear sir/ madam, I am writing to report an issue with recall status reporting. All open recalls for my vehicle (VIN: [XXX] ) were completed at an authorized dealership on [01/27/2026]. I have documentation from the dealer confirming that the recall repairs were successfully performed. However, the recall status has not been updated in the NHTSA database and still appears as “open.” I request assistance in ensuring the recall completion is properly reported and reflected in the NHTSA system. Thank you. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11713806 — an unverified report by a vehicle owner.

STRUCTURE:BODY

The passenger-side power sliding door system failed to stop or reverse when it encountered physical interference with the vehicle’s open fuel door. The door continued opening under power despite clear obstruction by a fixed exterior body component. The affected components, including the sliding door mechanism and damaged fuel door latch, remain available for inspection upon request. A powered sliding door continuing to operate against an obstruction creates a foreseeable risk of injury to occupants or bystanders, as well as vehicle damage. If a person’s hand, arm, or clothing had been in the same position as the fuel door, injury could have occurred. The incident occurred during normal vehicle use and demonstrates inadequate safeguards against obstruction. The issue has been formally reproduced or confirmed by an independent service center which noted that the incident occurred as described during normal operation of the power sliding door, and no abnormal conditions were present at the time. No warning lamps, messages, or other symptoms appeared prior to the incident. The power sliding door operated normally and without indication of malfunction until it failed to stop when encountering the open fuel door. Fueling the vehicle with the fuel door open is routine and expected vehicle use. The absence of any interlock, sensor logic, or safeguard preventing a powered sliding door from operating against an open body panel represents a design deficiency rather than a maintenance or wear issue. This condition may affect other vehicles equipped with similar power sliding door systems and warrants evaluation.

NHTSA complaint #11707717 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER

Odometer Fraud. The contact purchased a 2014 Toyota Sienna. The contact stated that upon taking the vehicle to a dealer for an oil change, it was discovered through the Carfax report that there was a mileage discrepancy. The vehicle was a private sale through Facebook Market Place. At the time of purchase, the vehicle mileage was 146,000, but upon retrieving the Carfax report, the contact discovered that the mileage was 187,391 on the State inspection report dated June 18, 2025. The issue had not been reported to another agency.

NHTSA complaint #11698149 — an unverified report by a vehicle owner.

STRUCTURE

The contact owns a 2014 Toyota Sienna. The contact stated that while driving 70 MPH, there was an audible alarm coming from the vehicle, alerting the contact that the door was ajar. The passenger’s side slide door opened independently while the vehicle was in motion. The vehicle was modified to accommodate a ramp for the contact's two wheel-bound children. The contact pulled over to the side of the road and closed the sliding door. The contact's husband tied the door to prevent it from opening independently again. The check engine warning light was intermittently illuminated. The vehicle was taken to the dealer, where it was inspected. The contact was informed that two latches had corroded and needed to be replaced. The vehicle was not repaired. Upon further investigation, the contact related the failure to NHTSA Campaign Number: 16V858000 (STRUCTURE). However, the VIN was not included. The manufacturer was not made aware of the failure. The failure mileage was approximately 99,500.

NHTSA complaint #11685365 — an unverified report by a vehicle owner.

ENGINE

The contact owns a 2014 Toyota Sienna. The contact stated that while driving 70 MPH, there was an audible alarm coming from the vehicle, alerting the contact that the door was ajar. The passenger’s side slide door opened independently while the vehicle was in motion. The vehicle was modified to accommodate a ramp for the contact's two wheel-bound children. The contact pulled over to the side of the road and closed the sliding door. The contact's husband tied the door to prevent it from opening independently again. The check engine warning light was intermittently illuminated. The vehicle was taken to the dealer, where it was inspected. The contact was informed that two latches had corroded and needed to be replaced. The vehicle was not repaired. Upon further investigation, the contact related the failure to NHTSA Campaign Number: 16V858000 (STRUCTURE). However, the VIN was not included. The manufacturer was not made aware of the failure. The failure mileage was approximately 99,500.

NHTSA complaint #11685365 — an unverified report by a vehicle owner.

LATCHES/LOCKS/LINKAGES:DOORS:LATCH

The passenger side cable that opens and closes the door snapped and is disconnected. The door will get stuck in an open or closed position.

NHTSA complaint #11667719 — an unverified report by a vehicle owner.

LATCHES/LOCKS/LINKAGES

The contact owns a 2014 Toyota Sienna. The contact stated that while opening the driver’s side sliding door, the drive belt snapped. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the sliding door drive belt. The vehicle was not repaired. The contact also stated that the same failure later occurred on the passenger’s side sliding door. The manufacturer was not notified of the failure. The failure mileage was 155,000.

NHTSA complaint #11659000 — an unverified report by a vehicle owner.

ENGINE

Timing chain cover leaking oil. This is known issue on 3.5L V6 model years 2011 -2022

NHTSA complaint #11657897 — an unverified report by a vehicle owner.

LATCHES/LOCKS/LINKAGES:DOORS:LATCH

The contact owns a 2014 Toyota Sienna. The contact stated that the passenger's side and driver's side sliding doors were locked and had failed to open automatically and manually. The contact stated that the motors of the doors were previously replaced; however, the failure persisted. The vehicle was taken to the local dealer, where the doors could not be opened. The dealer determined that the Power Sliding Door Cable Sub-Assembly, the Sliding Door Center Hinge Assembly, the Fuel Filler Door Hinge and Pin, the Power Sliding Door Rear Lock Assembly, the Sliding Door Front Lock Assembly, and an unknown part had failed and needed to be replaced. The dealer related the failure to Toyota Campaign Number: ZK1. The manufacturer was notified of the failure and informed the contact that the vehicle was no longer covered because the campaign had expired. The vehicle was not repaired. The failure mileage was approximately 100,000.

NHTSA complaint #11619970 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

The contact owns a 2014 Toyota Sienna. The contact stated that the passenger's side and driver's side sliding doors were locked and had failed to open automatically and manually. The contact stated that the motors of the doors were previously replaced; however, the failure persisted. The vehicle was taken to the local dealer, where the doors could not be opened. The dealer determined that the Power Sliding Door Cable Sub-Assembly, the Sliding Door Center Hinge Assembly, the Fuel Filler Door Hinge and Pin, the Power Sliding Door Rear Lock Assembly, the Sliding Door Front Lock Assembly, and an unknown part had failed and needed to be replaced. The dealer related the failure to Toyota Campaign Number: ZK1. The manufacturer was notified of the failure and informed the contact that the vehicle was no longer covered because the campaign had expired. The vehicle was not repaired. The failure mileage was approximately 100,000.

NHTSA complaint #11619970 — an unverified report by a vehicle owner.

ENGINE

I have 2014 Toyota sienna head gasket problem with less than 100,000 k

NHTSA complaint #11573524 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

The driver's side passenger door power cable broke. We had to turn off the power to all of the mechanical doors. There may have been a recall on this awhile back. The cable could be seen outside of the vehicle. We since have tucked it out of the way.

NHTSA complaint #11563799 — an unverified report by a vehicle owner.

STRUCTURE

The contact owns a 2014 Toyota Sienna. The contact stated while driving at various speeds, the contact heard abnormal sounds coming from the vehicle. The passenger’s side slide door became inoperable. No warning light was illuminated. The vehicle had not been diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure and advised the contact to call the NHTSA Hotline for assistance. The failure mileage was approximately 68,000.

NHTSA complaint #11552851 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

The spare tire, which is normally secured under the minivan, fell off while driving at approximately 40 mph. My son, who was driving the vehicle, heard a sudden loud noise from the underside of the vehicle. He looked in his rearview mirror and saw something in the middle of the road. He pulled over to inspect the vehicle, and noticed that the spare tire was gone, which he was able to retrieve. I brought the vehicle to a local Toyota dealer, who indicated I needed a new spare tire carrier (at a cost of $329.07), since the original unit had failed due to rust. The spare tire had never been used or removed from its manufactured mounting position since original purchase of the vehicle in 2014. There were no warning signs at any time prior to the incident that the spare tire might come loose from its mounted position. The safety issues associated with this incident are obvious, e.g., another vehicle striking the spare tire or loosing control to avoid the spare tire; the tire rolling and striking a person, another vehicle, or damaging property, etc.

NHTSA complaint #11541783 — an unverified report by a vehicle owner.

STEERING

I HAD THE VEHICLE INSPECTED BY PERSONAL MECHANIC BECAUSE THE STEERING WHEEL WOULD TIGHTEN AND THEN RELEASE WHENEVER TURNED TO RIGHT AND RELEASE ON LEFT TURN. THIS WOULD HAPPEN ON A REGULAR BASIS WHEN TURNING THE WHEEL. THE MECHANIC DID RECOMMEND THAT I CALLED THE MANUFACTURER TO CHECK IF THERE WAS ANY RECALL FOR THE PROBLEM. WHICH I DID. RESPOND WAS NO AND SO I EXPLAINED THE PROBLEM TO THE REPRESENTATIVE. THERE IS NOT A FAILURE OR INCIDENT EXCEPT THE STEERING WHEEL KEEPS ON TIGHTENING AND I'M JUST BEING CAUTIOUS. NO MANUFACTURER, POLICE, OR INSURANCE HAS INSPECTED IT BECAUSE THERE IS NO ACCIDENT. THANK GOD! JUST CONCERNED BECAUSE MY MECHANIC SAID IT IS SOMETHING FOR THE DEALERSHIP. SOMETHING TO DO POSSIBLY WITHIN THE STEERING COLUMN/CHANNEL COMPONENT. NOT SURE WHICH IS RIGHT, BUT TO CHECK FOR RECALL BY MANUFACTURER. I TOOK IT TO TIRE KINGDOM BUT SOMETHING ELSE WAS REPAIRED. SO I'M STILL HAVING TROUBLE WITH STEERING WHEEL STIFF TIGHTENING UP LIGHTLY. I WOULD FEEL IT TIGHTEN WHENEVER DRIVING 45 MILES OR MORE.

NHTSA complaint #11514086 — an unverified report by a vehicle owner.

SEAT BELTS

After a rain, water will leak into the driver and front passenger seatbelt coil housing. The front passenger seatbelt was not used in some time and mold developed with green and black stains all along the seatbelt. After it rained, the driver side seatbelt released about 1 cup of water when I pulled the seatbelt. With my wife as the passenger, she was conflicted about wearing the seatbelt while having mold pressed against her body, clothes, and breathing it in. The smell of mold is now present in the vehicle. This problem has been reproduced via online reports at SiennaChat.com. No warning lamps, messages or symptoms appeared prior, or during, this issue. I am in the process of reporting it to Toyota as soon as the next business day (Monday).

NHTSA complaint #11509193 — an unverified report by a vehicle owner.

WHEELS

Tire pressure monitor system dashboard icon is ridiculously non-intuitive. Both my wife and daughter have been baffled by it because the icon DOES NOT LOOK LIKE A TIRE! Neither are stupid, one is a college grad and the other is a junior at ASU. The icon is a cross-section of a tire, and none of them know what a tire cross-section looks like. Because of this, they have driven on dangerously under inflated tires without knowing it. Fix the icon SO IT LOOKS LIKE A TIRE! Thank you.

NHTSA complaint #11495971 — an unverified report by a vehicle owner.

WHEELS

The van seems to prematurely wear tires out before their service life expectancy. I've owned the van for seven years, and I've had to purchase over five complete sets of tires. The front tires wear-out much faster than the rear tires, and do not last more than 15K miles. I've had several alignment jobs done, both (L&R) control arms replaced, ball joints, and struts - the van still wears out tires regardless of tire brand. I suspect the must be a design flaw causing premature wear and tear on tires on the front of the van, as I just replaced another set of tires from the Yokohama brand recommended for the van. I've asked Toyota, and they claim ignorance of such a problem. It is my desire to make this problem known, and to have the Government investigate if there is an design flaw in the Sienna van which is causing rapid part failures.

NHTSA complaint #11489474 — an unverified report by a vehicle owner.

SUSPENSION

The van seems to prematurely wear tires out before their service life expectancy. I've owned the van for seven years, and I've had to purchase over five complete sets of tires. The front tires wear-out much faster than the rear tires, and do not last more than 15K miles. I've had several alignment jobs done, both (L&R) control arms replaced, ball joints, and struts - the van still wears out tires regardless of tire brand. I suspect the must be a design flaw causing premature wear and tear on tires on the front of the van, as I just replaced another set of tires from the Yokohama brand recommended for the van. I've asked Toyota, and they claim ignorance of such a problem. It is my desire to make this problem known, and to have the Government investigate if there is an design flaw in the Sienna van which is causing rapid part failures.

NHTSA complaint #11489474 — an unverified report by a vehicle owner.