Where each one leads
Buick Terraza
- Against cars of the same year, the Buick Terraza comes out better in New York safety inspections (fails 43% more often than average) than the Toyota Sienna (fails 83% more often than average).
Toyota Sienna
- On Canada's official test the most frugal 2026 Toyota Sienna uses 6.6 l/100 km, the 2007 Buick Terraza 12.6.
Only measures that do not depend on how many cars were sold: pass and failure rates against cars of the same age, ratings, fuel use and CO₂. How we compare
At a glance
| Buick Terraza | Toyota Sienna | |
|---|---|---|
| Model years in the US safety record | 2005–2008 | 1996–2020 |
EEA new-car registrations (CC BY 4.0) · DVLA licensed vehicles (OGL v3.0) · RDW (CC0) · Traficom (CC BY 4.0) · generations: Wikidata (CC0).
Reliability and problems
| Buick Terraza | Toyota Sienna | |
|---|---|---|
| New York safety inspections failed | 3.3% | 3.1% |
| … against cars of the same year | +43% | +83% |
| US owner complaints | 207 | 8,552 |
| Most complaints about | Electrical system | Structure |
| Model year with most complaints | 2005 (120) | 2004 (2,062) |
| US recall campaigns | 3 | 50 |
| Manufacturer service bulletins | 2,840 | 5,314 |
| NHTSA defect investigations | 6 | 32 |
Complaint, recall and bulletin counts grow with the number of cars sold and are not adjusted for it. UK MOT: DVSA anonymised MOT results (OGL v3.0); New York: DMV inspections; complaints, recalls, bulletins and investigations: NHTSA (public domain); odometer: RDW (CC0).
Safety
| Buick Terraza | Toyota Sienna | |
|---|---|---|
| NHTSA overall rating | — | 5★ (2020) |
NHTSA New Car Assessment Program, most recent rated model year (public domain).
Fuel, emissions and price
| Buick Terraza | Toyota Sienna | |
|---|---|---|
| Official combined fuel use, Canada | 12.6 l/100 km (2007) | 6.6 l/100 km (2026) |
Canada: NRCan Fuel Consumption Ratings, most frugal version of the latest year (OGL Canada). Europe: EEA monitoring of new-car CO₂ and on-board fuel meters (OBFCM), CC BY 4.0. Price: RDW catalogue price (CC0). Finland: Traficom (CC BY 4.0).