TOYOTA SIENTA (2020)
Running costs, common problems, and reliability data based on 47 real MOT tests in 2024.
MOT Pass Rate
91%
Total Tests (2024)
47
Avg Mileage
40,657 mi
Est. Annual Cost
£1,582
Is the 2020 TOYOTA SIENTA reliable?
Excellent reliability. Very few MOT failures. That's 9 points above the national average of 82%. It also outperforms the TOYOTA brand average of 84%.
At 4 years old, 91% of TOYOTA SIENTAs from 2020 passed their MOT first time in 2024. That's based on 47 tests across the UK. The average mileage at this age is 40,657 miles.
How does the 2020 TOYOTA SIENTA compare?
Mileage Analysis
The average 2020 TOYOTA SIENTA has 40,657 miles on the clock, which is above the expected 29,600 miles for a 4-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Best year to buy a TOYOTA SIENTA?
The most reliable year is the 2018 model with a 100% MOT pass rate, while the 2016 model has the lowest at 88%. The 2020 sits between the two at 91%.
How much does a 2020 TOYOTA SIENTA cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
TOYOTA SIENTA by Year
Checking a specific TOYOTA SIENTA?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2020 TOYOTA SIENTA
The 2020 TOYOTA SIENTA is a small family car with a 1490cc hybrid engine. 47 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 2020, the average MOT pass rate is 92%, and this model falls short of that benchmark.
With an average of 40,657 miles at 4 years old, TOYOTA SIENTA owners cover more miles than the average driver.
2020 TOYOTA SIENTA Fuel Costs
The 1490cc hybrid engine offers a reasonable balance between performance and economy. Expect around 42 mpg in mixed driving, which works out to roughly £1,137 per year at current hybrid prices of 142p per litre (based on 7,400 miles per year). As a hybrid, real-world fuel costs will vary significantly depending on how much electric-only driving you do.
What does it cost to own a 2020 TOYOTA SIENTA?
Total estimated annual running cost is £1,582 (£132/month), broken down as £1137 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 91% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
TOYOTA SIENTA Reliability Trend
Newer TOYOTA SIENTAs show better MOT pass rates than older ones, with an average improvement of 11 percentage points.
Buying a Used 2020 TOYOTA SIENTA
At 4 years old, the TOYOTA SIENTA offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2018 model has the highest pass rate at 100%. Note: with only 47 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2020 TOYOTA SIENTA
If reliability is your priority, there are 2 similar cars with a higher MOT pass rate. Here are comparable hybrid cars with similar engines:
- TOYOTA YARIS (2018) 91% pass rate (same) from 42,493 tests
- MINI COOPER S (2019) 92% pass rate (+1%) from 33,682 tests
- TOYOTA C-HR (2018) 90% pass rate (-1%) from 31,950 tests
- VOLVO XC40 (2021) 93% pass rate (+2%) from 25,698 tests