2012 Toyota Sienna Engine cooling Problems
- Complaints
- 1about this part
- Share
- 0%of 247 total for the year
- Median mileage
- 1,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2012 Toyota Sienna, 0% of the 247 complaints for this model year. Where a mileage was given, the median is 1,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Joining highway in a situation where vehicles giving way cause hesitation and then give way causing braking then acceleration repeatedly, transmission refused to downshift on kick down, vehicle would not accelerate, actually slowed significantly forcing following vehicles to brake .vehicle eventually began to pick up speed.generally poor response from transmission in all modes. Transmission drops out of drive at low speeds causing engine to race before taking up drive, very hard to operate vehicle smoothly.. …”
NHTSA complaint #10456744, filed 2012-04, 1,500 milesRelated service bulletins
- 10253223Mar 4, 2024This is to advise of various price adjustments that will affect Toyota Genuine Motor Oil and Long Life Coolant, effective March 1, 2024. These products are ordered through the…
- 10183281Oct 21, 2020TT: HVAC drain tube is found to be blocked/clogged.
- 10178524Jul 30, 2020TT: HVAC drain tube is found to be blocked/clogged.
- 10177599Jun 3, 2020These SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication requested return of unsold inventory due to a loss of CARB certification. These SKUs can no…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2013 | 1 | 1% |
| 2012 | 1 | 0% |
| 2011 | 6 | 1% |
| 2010 | 4 | 2% |
| 2009 | 4 | 2% |
| 2008 | 12 | 3% |
| 2007 | 14 | 4% |
| 2006 | 4 | 0% |
| 2005 | 17 | 2% |
| 2004 | 46 | 2% |
| 2003 | 6 | 6% |
| 2002 | 16 | 9% |
| 2001 | 24 | 13% |
| 2000 | 66 | 18% |
| 1999 | 39 | 18% |
| 1998 | 33 | 11% |
Other parts of the 2012 Toyota Sienna
84 complaintsBody and structure
72 complaintsOther or unknown
28 complaintsElectrical system
27 complaintsTransmission and drivetrain
17 complaintsSteering
15 complaintsWheels
12 complaintsBrakes
11 complaintsVehicle speed control
11 complaintsEngine
9 complaintsTires
8 complaintsVisibility (wipers, defrost, mirrors)
8 complaints
← All problems reported for the 2012 Toyota Sienna
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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