Toyota Sienta
Reliability, estimated running costs, and MOT data across 6 model years from 639 MOT tests in 2024.
Avg Pass Rate
93%
Total Tests
639
Highest Pass Rate
2017 (91%)
Years Covered
6
About the Toyota Sienta
The Toyota Sienta was MOT tested 639 times in 2024 (DVSA data, retests included) across 6 model years (2015 to 2020), with an average pass rate of 93%. That's comfortably above the average of 82% across all models in our data. Our records list petrol and hybrid versions.
Best and Worst Years
Of the years with at least 100 tests, the 2017 model has the highest pass rate at 91% from 244 tests. The 2016 model has the lowest at 88%. With just a 3 point gap, pass rates are similar across these years. Newer cars usually pass more often simply because they are younger.
Mileage Across Years
The oldest model in our data (2015) averages 54,156 miles, while the newest (2020) averages 40,657 miles.
Compared to the Toyota brand average of 84%, the Sienta performs 9 points better, making it one of the more reliable options in the Toyota range.
Estimated Running Costs
Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.
Full 2020 detailsHow reliable is the Toyota Sienta?
Toyota Sienta by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Toyota Sienta
Is the Toyota Sienta reliable?
Across its 6 model years in our data (2015 to 2020), the Toyota Sienta averages a 93% MOT pass rate, from 639 tests (DVSA MOT data for tests in 2024, retests included). That's 11 points above the average of 82% across all models in the same data. The 2017 model has the highest pass rate of the years with at least 100 tests, at 91%.
Which year Toyota Sienta has the best MOT pass rate?
Of the years with at least 100 tests, the 2017 Toyota Sienta has the highest MOT pass rate at 91%, while the 2016 model has the lowest at 88%, a 3 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
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