2019 Toyota Sienna Complaints

POWER TRAIN — Filed 04/16/2026

2019 Sienna XLE with 77,000 miles has a UA80 Transmission is whining at the final gear per Imperial Toyota Milford MA service center. They want to replace the transmission for 9,000 USD and Toyota Corporate refuses assistance. It appear to be a common defect which could lead to transmission lockup if the gear fails.

LATCHES/LOCKS/LINKAGES — Filed 11/13/2025

The contact owns a 2019 Toyota Sienna. The contact stated that while attempting to open the driver's side sliding door, the door failed to completely open but remained ajar. The contact became aware that an electrical cable was hanging from the door. The vehicle was taken to the dealer, where it was diagnosed, and determined that the cable needed to be replaced. The dealer informed the contact that the door needed to be taken off and reinstalled to repair the vehicle. The vehicle was not repaired due to the cost. The manufacturer was notified of the failure, but no assistance was provided. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 72,000.

UNKNOWN OR OTHER — Filed 03/01/2026

Started hearing a whining noise upon acceleration. Took car to Toyota for a diagnostic check. Discovered transmission is failing. Recommended repair is a full transmission replacement, quoted 10,000. After bringing to a local mechanic for a second opinion, he claims this is a widespread issue with Toyota Siennas in similar years. After some research, Toyota quietly claims there was an issue in the manufacturing of these transmissions however won’t take accountability

STRUCTURE — Filed 12/15/2022

About 2 years after the 9/30/2019 purchase (new), the paint on the front engine hood began peeling & cracking. Calls to Parks Toyota were ineffective. Now the entire hood has pervasive cracks. The hood needs to be removed, sanded & painted with a more substantial, long-lasting paint. The paint used is supposed to contain an additional clear coat for protection.

POWER TRAIN — Filed 06/12/2025

Transmission has failed and been replaced. This is part of issues from 2017 to 2020 tranny failures, loud whining and needing to be replaced. Tranny failure is very dangerous to the occupants. Toyota has failed to warranty these.

UNKNOWN OR OTHER — Filed 10/28/2025

Lyft deactivated 60yo driver (7yr Lyft, 30yr driving) over vague "unsafe driving". Submitted **20 raw dashcam videos** (Oct 29, 2025) proving: - Full stop at flashing red light - Safe rolling stops (<4 mph) in Toyota Sienna + 3 passengers - Max 28 mph Videos requested by Lyft but ignored. **Tickets:** XXX/ XXX/ XXX **Evidence:** https://drive.google.com/drive/folders/1OIgAwnaAV8Jr8GS4uiUcmqwYodmgCAWy?usp=sharing Lyft violates safety policy (§7.3). INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

POWER TRAIN — Filed 06/29/2025

sever transmission whine started at 138k miles over a year ago.Toyota will not fix issues under recalled ua80 transmission. Said my vin doesn’t fall within recall.

Chest Clip, Buckle, Harness — Filed 05/25/2025

The Harness Adjuster Strap (item 5 in attached snip from user manual) loosens while in use. This item was manufactured post-recall 24C002000, using Nuna's new design described here: [XXX] This design change did not prevent the functionality of the strap to fail. There was zero to minimal debris (no food, drink, or water) in the mechanism causing it to fail. The Harness Release button (item 4 in snip from user manual) actuates freely. The adjuster strap, and subsequently the entire harness strap, moves freely, while the carseat is loaded or unloaded. I have a video available showing that the strop in the seat freely moving. We discovered the product failure while loading the child in the carseat and testing it's security by pulling on chest straps. Nuna's response was lackluster and unprofessional. Here is the sequence of events: We immediately reported the issue the first business day available, May 27th, and Nuna responded 24hrs later, informing us they would again respond in 1-2 business days to send us a form and shipping label to send back the defective product. We responded the same day asking them to expedite the process and send us a new product immediately as we had no backup for a carseat and my wife could not leave the home. A little over 48 hrs later they denied our request, and sent us the shipping and RMA form. We are now a full business week past the initial request and now are returning the carseat, with no assurance of when the replacement will be delivered. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

POWER TRAIN — Filed 09/09/2024

Transmission UA80e is a poorly designed transmission. It almost caused an accident due to the transmission lunching forward on its own. Also has a whine coming from the transaxle. There is a customer service program for the 2017-2018 models about this issue. But I have a 2019 and not eligible for the program. Would like for Toyota to make this right. Less than 5 year old van.

AIR BAGS — Filed 09/14/2023

My van was struck directly in the driver side rear sliding door while sitting still at a stop sign. The other driver collided straight into the passenger compartment door at an approximate speed of 30 mph crushing the door, exploding the window and neither the driver side airbags nor the side curtain airbags deployed. Resulting in my wife severely jarring around in the driver's seat, as well as my son who was securely fastened in a child booster seat in the driver side rear seat. The glass from the rear door window shattered and covered my son and the interior of the vehicle. There are no active recalls, but I read about a recall concerning the passenger side door welds that could affect operation of the side airbag and side curtain airbag sensors, but this only applied to a small number of 2019 Sienna's. Could this have been a manufacturing defect that bled over to the other door structures affecting the sensors in the same way.