2015 Toyota Sienna Engine Problems
NHTSA lists 18 engine complaints for the 2015 Toyota Sienna, about 8% of its 232 total complaints, including 4 fires and 5 injuries. Median mileage at failure was 36,650 miles. No related recalls are listed for this engine issue.
- Engine complaints
- 18
- 8% of 232
- Crashes reported
- 1
- Fires reported
- 4
- Injuries reported
- 5
- Median mileage
- 36,650 mi
- Related recalls
- 0
Typical engine symptoms owners report
- Owners report the engine catching fire without warning, sometimes while the vehicle was parked or driving, in some cases producing smoke and flames that damaged the vehicle extensively.
- Some owners describe the engine stalling suddenly at speed or at idle, with a burning smell present in at least one case tied to a later engine fire.
- Several complaints describe persistent oil leaks from the timing chain cover, timing cover gasket, or upper oil pan, with repeated dealer repairs failing to permanently fix the leak.
- One owner reported a complete engine seizure and total loss of power, power steering, and power braking while driving at 99,000 miles.
- One complaint describes a burnt or stuck intake valve causing loss of compression in a cylinder, rough running, and loss of acceleration.
- One owner reported delayed throttle response during highway merging, where the engine failed to respond for a few seconds before surging.
When 2015 Toyota Sienna engine complaints were filed
First complaint Apr 19, 2015, latest Aug 26, 2026.
Engine recalls for the 2015 Toyota Sienna
No safety recalls on record for this model year.
Engine complaints by Sienna model year
Raw complaint counts per model year; newer years have had less time to accumulate complaints.
Frequently asked questions
- How common are engine problems in the 2015 Toyota Sienna?
- NHTSA lists 18 engine complaints for the 2015 Sienna, which is 8% of the 232 total complaints filed for that model year.
- Is there a recall for the 2015 Toyota Sienna engine?
- No related recalls are listed in NHTSA data for this engine complaint category.
- Have there been engine fires reported in the 2015 Toyota Sienna?
- Yes, NHTSA data shows 4 fires and 5 injuries connected to the complaints filed under the engine and related electrical/fire incidents for this model year.
- At what mileage do 2015 Sienna engine problems tend to occur?
- The median mileage at failure reported to NHTSA for engine-related complaints on the 2015 Sienna is 36,650 miles.