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What 69 owners told NHTSA about the 2018 Toyota Sienna

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (69)Crash / fire / injury (6)Transmission & drivetrain (18)Fuel system (13)Electrical system (6)Airbags (5)Body & structure (5)Engine (5)Speed control (5)Seats (4)Brakes (2)Visibility & wipers (2)

5 of 69 complaints match · Body & structure · clear filters

Jan 25, 2022Transmission & drivetrainBody & structureSeats

The last week of September 2021 my husband notice a sound like water runing and a leak on the driver and passenger seats, we take the vehicle to the Dealer for an inspection on October 2nd. They said the AC hose was clogged for a spiderweb and the leak can create a mold. This mold can affect my family health. We informed to the insurance and we taked the vehicle to the Dealer for repair. They did an expensive special cleaning to Remove the mold, and disamble my entire vehicle, the worse is my vehicle still unassembled after 3 months at the dealership. All this happens with out any warning sign, symptoms or light. This vehicle is 3 years old and all services on time and by the same Dealership. My vehicle has a lot of technology but not warning about this AC clogged and damage my entire vehicle wich still on repair.

NHTSA ODI 11448917

Jul 3, 2021Body & structure

The front passenger side bumper snap(s) comes undone, by air flow, as vehicle travels down the road - this causes further tearing of the supporting plastic frame. Local Toyota dealership says this initially was caused by a driver of the vehicle hitting a concrete curb. Note: Bottom of the bumper is only 8 inches from ground surface. The safety issue is: the bumper and its supporting plastic frame will eventually break and fall off vehicle while in transport. I have witnessed this several times on other vehicles (especially on Toyota's). Dealer compounds problem by saying entire bumper has to be replaced at high cost to customer. Customer delays repair (as I have). This causes further damage to the supporting plastic frame. I have gone from one snap to several snaps in duration. I sent Corporate Toyota a complaint - Essentially, they said they would not do anything .

NHTSA ODI 11423342

Oct 29, 2020Body & structure

POWER DOOR CABLE BROKE,DOOR DOES NOT OPEN

NHTSA ODI 11372307

Sep 18, 2018Body & structure

THE AUTOMATIC SLIDING DOORS DO NOT HAVE AN AUTO/EMERGENCY STOP IF SOMETHING IMPEDES THEIR SHUTTING. A CHILD CAN GET CRUSHED IF AN ADULT IS NOT THERE TO STOP THE DOORS. EVEN THOUGH I WAS THERE IT WAS VERY HARD FOR ME (AN ADULT) TO STOP THE DOORS FROM CLOSING. YES, THE CHILD WAS WRONG FOR PUSHING THE CLOSE BUTTON THEN REACHING BACK IN THE VAN TO RETRIEVE SOMETHING. HE THOUGHT IT WOULD STOP UNTIL HE WAS DONE. THANKFULLY I WAS STANDING BESIDE HIM AND WAS ABLE TO PULL HIM AWAY BUT THE DOOR STILL CAUGHT MY ARM AND I HAD TO PUSH REALLY HARD TO STOP IT. IT JUST HAPPENED SO FAST. THE VEHICLE WAS STATIONARY, IN PARK, AND THE IGNITION WAS SWITCHED OFF.

NHTSA ODI 11130170

Aug 31, 2018Body & structure

TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT THE CARPET ON THE DRIVER SIDE NEAR THE ACCELERATOR AND BRAKE PEDALS WAS LOOSE AND MADE CONTACT WITH THE DRIVER'S FOOT WHILE DRIVING. THE VEHICLE WAS TAKEN TO CAIN TOYOTA (6527 WHIPPLE AVE NW, NORTH CANTON, OH), BUT THE FAILURE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 4,700.

NHTSA ODI 11123640

Working with the data? Download all 69 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2018 Toyota Sienna verdict →