2008 Toyota Sienna Electrical system Problems
- Complaints
- 45about this part
- Share
- 10%of 429 total for the year
- Median mileage
- 71,010miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 45 complaints about the electrical system of the 2008 Toyota Sienna, 10% of the 429 complaints for this model year. Where a mileage was given, the median is 71,010 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My dash panel warning lights 4 or 5 lite up, took it to a Toyota dealer, he put it on a computer and stated that ,your catalitic converter, muffler and other parts need to be replaced. Took it to another mech. He put a pint of lukus gas treatment,told me to fill the tank with higher octaine gas and run it in 4th gear .”
NHTSA complaint #11189820, filed 2019-03, 15 miles“Sliding door on our 2008 Sienna stopped opening or closing. We can not get in our get out off the car on driver side. We are glad it happened on parked position. It is not working electrical or manual mode. Toyota is asking about $1600-3000 for repair. We are trying to use the van with one sliding door and it is nor practical or safe.”
NHTSA complaint #10846223, filed 2016-03, 96,755 miles“I was getting things out of back with power lift gate up. While leaning in vehicle the power lift gate came down without warning and caught me. It did not continue to crush me but it did not reverse so I had to use a pretty good force to push it up (my wife probably would not have been able to do it). It did it a second time a week or so later. When I took it to Toyota they said the struts were bad and replaced them. …”
NHTSA complaint #10702497, filed 2015-03, 72,465 miles“The rubberized surface of the rear door latch has dissolved into goo. I assume that heat from an electrical short melted the rubber. Thus, two problems: 1) this may be a sign of a serious electrical problem that will manifest itself again but with respect to a critical component; and 2) each time the latch is used, some of the black goo comes off on my hand.”
NHTSA complaint #10428410, filed 2011-10, 45,000 miles“I had trouble accelerating up a hill and stalling and turning off on the road. I took my vehicle to my Toyota dealership for inspection and was told that rodents or such type had chewed on the electrical wiring harness because of the insulation materials attractiveness. After been first offended, I then remembered seeing a squirrel near the vehicle I presumed innocently taking shade from the hot florida sun. During that time I parked my vehicle in my driveway outside. …”
NHTSA complaint #10948012, filed 2017-01, 16,485 milesRelated service bulletins
- 10238157May 30, 2023TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered…
- 10182983Oct 12, 2020TT: Some customers may encounter Bluetooth® connectivity concerns such as: ?Difficulty to pair the phone. ?Intermittent Bluetooth® failure to connect to the vehicle when first…
- 10164330Jul 1, 2019TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections…
- 10155247Feb 28, 2019TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first…
- 10133654Nov 22, 2017TSB: REVISION NOTICE November 22, 2017 Rev1: ? Applicability has been updated to include 2014 ? 2018 model year vehicles. Any previous printed versions of this bulletin should be…
- 10132705Oct 25, 2017TSB: REVISION NOTICE October 25, 2017 Rev2: ? Applicability has been updated to include 2008 ? 2010 model year Sienna vehicles. ? The Production Change Information section has…
- 10132360Jun 15, 2017Warranty Policy Bulletin POL14-11: Rev Toyota has received reports where some vehicles may exhibit cracked and/or sticky/melting dashboards as a result of heat or humidity.
- 10131838Mar 22, 2017Warranty Policy Bulletin POL14-11: REVISED March 22, 2017: Toyota has received reports where some vehicles may exhibit cracked and/or sticky/melting dashboards as a result of…
- 10131837Mar 22, 2017Dealer Daily: Voluntary Extension of Warranty Coverage for Cracked and/or Sticky/Melting Dashboards (Instrument Panels) as a Result of Heat or Humidity.
- 10152205Jan 6, 2017TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0101-11. Applicability has been updated to include 2016 ? 2017 model year vehicles…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 12 | 10% |
| 2021 | 13 | 8% |
| 2020 | 7 | 18% |
| 2019 | 4 | 9% |
| 2018 | 7 | 10% |
| 2017 | 20 | 13% |
| 2016 | 9 | 12% |
| 2015 | 44 | 19% |
| 2014 | 16 | 10% |
| 2013 | 22 | 12% |
| 2012 | 27 | 11% |
| 2011 | 69 | 11% |
| 2010 | 20 | 12% |
| 2009 | 28 | 14% |
| 2008 | 45 | 10% |
| 2007 | 18 | 5% |
| 2006 | 85 | 8% |
| 2005 | 65 | 6% |
| 2004 | 132 | 6% |
| 2003 | 4 | 4% |
| 2002 | 24 | 13% |
| 2001 | 20 | 11% |
| 2000 | 17 | 5% |
| 1999 | 10 | 5% |
| 1998 | 14 | 5% |
Other parts of the 2008 Toyota Sienna
117 complaintsVehicle speed control
51 complaintsBrakes
43 complaintsEngine
39 complaintsOther or unknown
38 complaintsTransmission and drivetrain
38 complaintsSteering
33 complaintsElectronic stability control
29 complaintsTires
19 complaintsAir bags
14 complaintsLatches, locks and linkages
13 complaintsSeat belts
13 complaints
← All problems reported for the 2008 Toyota Sienna
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology