How much does a 2015 TOYOTA SIENTA cost to run?

Estimated annual running cost is £1,737 (£145/month), including £1137 fuel, £195 road tax, £55 MOT, and £350 predicted repairs.

What is the MOT pass rate for a 2015 TOYOTA SIENTA?

The 2015 TOYOTA SIENTA has a 87% MOT pass rate based on 46 tests in 2026. This ranks 262 out of 559 cars from 2015.

Which year TOYOTA SIENTA is most reliable?

The 2018 TOYOTA SIENTA has the highest MOT pass rate at 100%. The least reliable year is 2016 at 88%.

TOYOTA SIENTA (2015)

Q: Is the 2015 TOYOTA SIENTA reliable?

Good reliability. Occasional issues but generally solid. 87% of TOYOTA SIENTAs from 2015 passed their MOT first time in 2026, based on 46 tests. That's 5 points above the national average of 82%.

Q: What is the average mileage for a 2015 TOYOTA SIENTA?

The average mileage for a 2015 TOYOTA SIENTA is 54,156 miles, which is below the expected 81,400 miles for a 11-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 46 real MOT tests.

Annual Cost

£1,737

£145/month

MOT Pass Rate

87%

Good

Road Tax

£195

Based on CC/year

Insurance

Grp 8-20

1400cc Hybrid

Solid Option

87% pass rate, £1737/year to run. 5 points above average.

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Hybrid1400cc11 years old46 tests54k miles avg

Annual Running Costs

Fuel (Hybrid, 1400cc)

~42 mpg

£1,137

Road Tax

Based on 1400cc

£195

MOT Test

£55

Predicted Repairs

£350

Total per year£1,737

Per month£145/mo

Per week£33/wk

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.

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Reliability Verdict

87% MOT pass rate(Good)

0%National avg: 82%100%

Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.

At 11 years old, 87% of TOYOTA SIENTAs from 2015 passed their MOT first time in 2026. That's based on 46 tests across the UK. The average mileage at this age is 54,156 miles.

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How Does It Compare?

Rank among 2015 cars262th of 559(top 47%)

Rank among TOYOTA models441th of 996(top 44%)

vs national average+5%(82% avg)

vs 2015 cars average+4%(83% avg)

vs TOYOTA average+3%(84% avg)

Mileage Analysis

54,156

Average miles

81,400

Expected for age

The average 2015 TOYOTA SIENTA has 54,156 miles on the clock, which is below the expected 81,400 miles for a 11-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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Best Year to Buy?

The most reliable year is the 2018 model with a 100% MOT pass rate, while the 2016 model has the lowest at 88%. The 2015 sits between the two at 87%.

TOYOTA SIENTA by Year

Year	Pass Rate	Tests	Avg Mileage
2020	91%	47	40,657 mi
2019	100%	64	45,073 mi
2018	100%	99	34,981 mi
2017	91%	244	44,918 mi
2016	88%	139	54,119 mi
2015	87%	46	54,156 mi

Similar Cars to Consider

AUDI Q3

2016 · 1400cc Hybrid

£1,572/year

87%

same

TOYOTA AURIS

2015 · 1798cc Hybrid

£1,867/year

87%

same

TOYOTA C-HR

2017 · 1197cc Hybrid

£1,400/year

90%

+3%

HYUNDAI IONIQ

2017 · 1580cc Hybrid

£1,732/year

89%

+2%

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About the 2015 TOYOTA SIENTA

The 2015 TOYOTA SIENTA is a small family car with a 1400cc hybrid engine. 46 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 2015, the average MOT pass rate is 83%, and this model beats that benchmark.

With an average of 54,156 miles at 11 years old, TOYOTA SIENTA owners tend to use this car less than the typical driver.

2015 TOYOTA SIENTA Fuel Costs

The 1400cc 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 2015 TOYOTA SIENTA?

Total estimated annual running cost is £1,737 (£145/month), broken down as £1137 fuel, £195 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 87% pass rate. Keeping on top of servicing will help avoid surprises.

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 2015 TOYOTA SIENTA

At 11 years old, the TOYOTA SIENTA is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2018 model has the highest pass rate at 100%. Note: with only 46 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

Based on the 2015 TOYOTA SIENTA's fuel type, age, and engine size, these are the most likely problem areas to check.

Hybrid Battery Health

Watch out

After 11 years, hybrid battery capacity may have reduced. A full replacement costs £2,000-£4,000, though reconditioning is cheaper at £500-£1,500.

Inverter and Power Electronics

Medium risk

The inverter converts DC to AC for the electric motor. Failures are expensive (£1,500+) but relatively rare. Listen for unusual buzzing sounds.

Regenerative Braking

Medium risk

Brake discs can corrode from reduced use (the electric motor handles most braking). Surface rust is normal but deep pitting needs attention.

Rust and Corrosion

Watch out

At 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.

Suspension Bushings

Watch out

Rubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2015 TOYOTA SIENTA stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
TOYOTA SIENTA(2015)	87%	£1137	£195	Grp 8-20	£1737
AUDI Q3(2016)	87%	£1137	£30	Grp 8-20	£1572-£165
TOYOTA AURIS(2015)	87%	£1327	£135	Grp 18-32	£1867+£130
TOYOTA C-HR(2017)	90%	£955	£190	Grp 5-15	£1400-£337
HYUNDAI IONIQ(2017)	89%	£1137	£190	Grp 12-25	£1732-£5

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.