2011 Toyota Sienna transmission problems

Filed Oct 23, 2025 · Brakes, Fuel system · WA

Catalizador causando bajas emisiones, consecuencia encendido de codigos de luz de advertencia de tablero como luz indicadora de falla (check engine). Luz de advertencia ABS. Luz indicadora de derrape vsc-trac y luz de advertencia de presion de neumaticos. Al viajar por carretera simplemente se apago y sin poder tener control de la misma dicha falla causo que ya no encendiera al tener que solicitar grua para el arrarstre de la unidad hasta la agencia de toyota en cordoba veracruz. Seguro solo intervino con el arrastre de la unidad. Pero la sienna a llevado hasta el dia de hoy y fecha presente todos los servicios de agencia por la cual se llevo de inmediato, pero con la novedad es que ni la misma agencia le a podido quitar la falla. No tienen ni la menor idea de la causa. Su solucion seguen ellos eran los inyectores pero la camioneta volivio a hacer la misma falla y la agencia no da garantia de su mano de obra. Solo aumenta el gasto en refacciones sin solucionar la falla.

Filed Sep 19, 2022 · Transmission · WI

Viscous coupling bearing making significant noise. Potentially hazardous if the issue causes the drivetrain to lock up.

Filed Aug 8, 2021 · Transmission · NJ

rear differential has very scary noise while driving, mechanic identified that we have to replace the rear differential which might cost $2500 to $3000 the same problem do exist on RAV4 and it's under recalls, while many people have the same problem for the same year like mine 2011 Toyota sienna AWD and other years to 2018 . This issue is the manufacture responsibility not the owner of the car as wear and tear items " my van has about 126,000 miles on it. Please a recall should be issued it is across for many people

Filed Jun 2, 2021 · Transmission · NY

Loud Noise from the rear end, diagnosed to be a viscous coupler bearing malfunction by my mechanic. Total cost of repair is 2428 Dollars. In doing my research into this matter, this is a very common issue with my model Sienna. It is also common with same year Rav4 which a TSB was issued and covered by Toyota T-SB-0080-13. To cite a transmission mechanics who have experiences with the Rav4/Sienna rear differential issues. https://www.youtube.com/watch?v=r1vg2sbYL68 I hope you can help, this is a very large cost which is almost the price of the car in total. My family needs this car as we do not live in a city with very little public transportation available to us for utilize. The price of the repair will be a hardship on our family. I hope you can convince Toyota to step up and stand behind their product, to a very well known issue. Thank you for all you do.

Filed Dec 26, 2020 · Engine, Fuel system · 110,000 miles · VA

I was driving from toronto to virginia on 23 dec 2020 and refilled gas in springfield ny walmart gas station to refill the gas. When I entered bedford pa turnpike, the car sounded with different sounds from engine on the ramp when entering the 70/76 freeway. When entered to virginia from maryland border after potomac river crossing on highway 15 , the car suddenly stopped while driving at 30 MPH and pulled the car to the side of the road slowly and when I restarted the car, it started normal and drove till chantilly virginia without any stopping. But the engine gave me different noises.

Filed Mar 26, 2020 · Transmission · 143,000 miles · MA

Rear differential failed at 143k miles

Filed Dec 17, 2019 · Transmission · 180,000 miles · WI

When accelerating vehicle makes loud humming noise. Stops when you take your foot off the gas. I was told it is the rear differential. I have read many complaints about this faulty part. Why is this not being investigated? $2000 repair.

Filed Oct 9, 2019 · Transmission · 100,000 miles · NY

Electromagnetic coupler on awd sienna, it seems like a super common problem that costs ~$2,500 us to fix and starts around the 100,000 mile odometer reading.

Filed Oct 3, 2019 · Transmission · 99,000 miles · NH

Began hearing a loud whirring sound from rear of car when car is in motion. Got louder over time. Our regular mechanic could not diagnose the noise. Toyota dealership finally diagnosed as a failed electromagnetic rear coupler. Suggested we not use 'cheap tires.' we never have. We actually went through three sets of the recommended 'run flat' tires in under 75,000 miles. As you know, these are not cheap tires to replace. Cost to replace coupler is incredibly high - should be covered under warranty, as a google search and discussions on toyota chat sites tell me this is a common problem.

Filed Jul 12, 2019 · Transmission · 165,000 miles · WI

Whirring noise from the rear differential while the vehicle is in motion. The pitch of the whir gets higher as the vehicle accelerates. Cause is a faulty bearing in the electromagnetic coupler assembly.