Pass rate
88.1%
Above average — 6.0 pts ahead of the 82.1% that cars this age and mileage manage.
Across 84 recorded tests.
Typical repair bill £26–£75
2015 Toyota Sienta MOT pass rate
- 2015
- typical 56,749 mi
Only 84 tests of this exact model and year are in the DVSA data, below the 100 we ask for before a page goes in the index. The figures are still shown, because they are the only ones there are.
Most common fault
Lamps & electrics
26.1% of faults · 12.2% nationally
Part only £6–£18 for Registration plate lamp inoperative (multiple lamps). What fitting it takes →
Which year to buy
- Best 2018 95.2% pass
- Avoid 2020 84.8% pass
Across the 6 years on record, a spread of 10.4 points. See every year →
- First-attempt pass
- 86.7%
- Typical mileage
- 57k mi
The 2015 Toyota Sienta MOT pass rate is 88.1% of its MOT tests — 6.0 points ahead of what its age and mileage predict. Lamps & electrics is the biggest single reason it fails, at 26.1% of what testers record.
Check your postcode
MOT pass rates are national — type your postcode to see how Toyota Sienta does in your corner of the country.
Expert verdict
Lamps & electrics: 2.1× the national share
Lamps & electrics make up 26.1% of everything recorded on the 2015 Toyota Sienta, against 12.2% nationally — 13.9 points above. Walk round the car with the lights on before the test: bulbs, indicators and number-plate lamps are the cheapest failures to prevent and among the most common.
- Beats its own age and mileage. Once you allow for how old and how far these cars have been driven, the expected pass rate is 82.1% and this one manages 88.1% — 6.0 points ahead of what its age and mileage predict.
- Based on a small sample. 84 tests back this page. That is enough to publish and to index, not enough to treat the decimal places as precise — read the pattern, not the second digit.
Written from this page's own figures: fault shares against the national composition, the like-for-like pass rate, and the priced repair list. How these are worked out
Watching a Toyota Sienta? Get an email when these numbers change .
How does the 2015 Toyota Sienta compare?
Cars of this age and mileage average 82.1%, so this figure is 6.0 points ahead of what its age and mileage predict. On a first attempt, before any retests, the figure drops to 86.7%. The median 2015 Toyota Sienta in this dataset had covered 56,749 mi.
The most common fuel recorded here is Hybrid — 67% of tests, with a 85.7% pass rate.
The single most recorded failure item is "Position lamp incorrect colour", noted on 3.57% of tests.
- 84 recorded tests behind this page.
- 88.1% overall pass rate, 86.7% on a first attempt.
- Across every year of the Toyota Sienta, the average is 89.6% — best year 2018 (95.2%), worst 2020 (84.8%).
Figures count every completed test on this vehicle-year in the dataset, including retests. See methodology for the exact definition.
This page's data
- Tests analysed
- 84
- Typical mileage (median)
- 56,749 mi
- Make and model
- Toyota Sienta
- Updated
- 2026-11-05
Source: DVSA anonymised MOT test data (2023–2025), OGL v3.0.
Top part to budget for
Headlight Bulb
Usually a DIY or independent-garage job.
Does mileage affect the Sienta MOT pass rate?
Pass rate by odometer reading. Bar lengths start at 42% so small gaps stay visible.
Fuel type and reliability
Pass rate by fuel type. Hybrid is the most common here (67% of tests).
Regional pass rates for the Sienta
| Region | Tests | Pass rate |
|---|---|---|
| South East | 29 | 93.1% |
| West Midlands | 20 | 90.0% |
Regions come from the postcode area recorded at the test station. Areas on region borders are assigned to the region with the majority of their population.
What fails a 2015 Sienta
Everything a tester recorded on this vehicle, grouped into the inspection sections that produced it. The notch on each bar is the national share, so you can see at a glance whether this car is unusual or just ordinary.
A test can record several items, so these percentages do not add up to 100%. The exact strings, with prices, are in the full DVSA record at the bottom of this page.
Before your test
Three checks worth doing on a 2015 Sienta
These are not generic tips — they are the faults recorded most often on this exact model, rewritten as things you can check yourself. All three take about ten minutes and cost nothing.
-
Check the lights 3.6% of tests
“position lamp incorrect colour”
Switch everything on and walk round the car: both headlamps on dip and main, every indicator, both brake lights, reverse, fog and the two number-plate lamps. A bulb is a few pounds and a five-minute job.
-
Check the suspension joints 2.4% of tests
“linkage ball joint dust cover ball joint dust cover no longer prevents the ingress of dirt”
With the car parked on level ground, rock the top of each front wheel in and out while someone watches the suspension arm. Clunks, or rubber boots split and greasy, are what testers record here.
-
Check the battery 1.2% of tests
“battery(ies) insecure”
Check the battery is secure and its terminals are clean and tight — a loose battery is a fail on its own, and a weak one shows up as slow cranking on a cold morning.
Shares are the proportion of tests on this vehicle that recorded the item, so they overlap: one test can record several.
What it costs to get a 2015 Sienta through its MOT
Across the 10 items that are recorded most often on this model, the average repair comes to £26–£75 — and 50% of those repairs are parts that cost under £30.
- Average repair across the 10 common items
- £26–£75
- Cheapest common item: rear fog lamp does not emit a steady red light
- £3–£15
- Dearest common item: joints constant velocity boot severely…
- £80–£250
- Common items a careful owner can do at home
- 80%
- Repairs that still cost under £30
- 50%
Estimates from typical UK parts prices, weighted by how often each item appears in 84 MOT tests on this vehicle. They exclude diagnostics, retest fees and garage labour where the part is a DIY fit, and they are not figures from the DVSA dataset. Older and higher-mileage examples cost more than the average. How these estimates are built → · All MOT repair costs → · Cheapest cars to put through a test →
Every year of the Sienta, side by side
6 model years on record, from 2015 to 2020. Across them the pass rate runs from 84.8% to 95.2% — a spread of 10.4 points. The bar under each year is the item that failed it most often.
- 2015 88.1%position lamp incorrect colour
- 2016 87.7% rear fog lamp not working
- 2017 89.7% registration plate lamp(s)…
- 2018 95.2% registration plate lamp(s)…
- 2019 92.7% joints constant velocity boot…
- 2020 84.8% rear fog lamp does not emit a…
Colour is the pass rate on a fixed scale, so a block means the same thing on any model. Each year links to its own page with the full fault breakdown.
Compare the 2015 Toyota Sienta with another year
The raw pass rate mostly measures age. The year comparison adds the like-for-like figure, the mileage bands and the repair bill.
Other 2015 cars with a similar record
- Suzuki Vitara 87.9%
- BMW 2 Series 87.9%
- MINI COOPER 88.3%
- Audi A7 88.3%
- BMW I3 87.8%
- Volkswagen Golf 87.6%
Closest pass rates among 2015 cars with at least 2,000 tests, so a small sample cannot flatter itself into the list. See the full rankings: best and worst MOT pass rates.
The full DVSA record for the 2015 Toyota Sienta 10 failure items · 6 advisories · 8 inspection categories · mileage brackets · all of it in the page, none of it above the fold
Every inspection category
Shares of the 69 individual items recorded on this vehicle, and the same share across all cars nationally. A single test can record several items, so a row is not a percentage of tests.
| Category | Items | This car | Nationally | Difference |
|---|---|---|---|---|
| Lamps, reflectors and electrical equipment | 18 | 26.10% | 12.21% | +13.89 |
| Suspension | 17 | 24.60% | 20.98% | +3.62 |
| Tyres | 17 | 24.60% | 19.76% | +4.84 |
| Brakes | 9 | 13.00% | 20.89% | −7.89 |
| Body, chassis, structure | 4 | 5.80% | 5.57% | +0.23 |
| Visibility | 2 | 2.90% | 4.97% | −2.07 |
| Identification of the vehicle | 1 | 1.40% | 1.76% | −0.36 |
| Road Wheels | 1 | 1.40% | 0.75% | +0.65 |
The exact failure items, in the tester's words
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Position lamp incorrect colour Lamps, reflectors and electrical equipment | Minor | 3.6% | £5–25 |
| Joints constant velocity boot severely deteriorated Body, chassis, structure | Minor | 2.4% | £80–250 |
| Linkage ball joint dust cover ball joint dust cover no longer prevents the ingress of dirt Suspension | Major | 2.4% | £18–45 |
| Rear fog lamp does not emit a steady red light Lamps, reflectors and electrical equipment | Major | 2.4% | £3–15 |
| Registration plate lamp(s) inoperative in the case of multiple lamps or light sources Lamps, reflectors and electrical equipment | Minor | 2.4% | £5–20 |
| Ball joint dust cover severely deteriorated Suspension | Minor | 1.2% | £18–45 |
| Battery(ies) insecure but not likely to fall from carrier Lamps, reflectors and electrical equipment | Minor | 1.2% | £60–140 |
| Dipswitch does not operate immediately when selected on main beam Lamps, reflectors and electrical equipment | Major | 1.2% | £5–25 |
| Driver's view of the road through the swept area of the windscreen significantly affected by an obstruction Visibility | Major | 1.2% | £80–200 |
| Fixing missing Road Wheels | Major | 1.2% | £20–55 |
Severity is as recorded: Major and Dangerous fail the test outright; Minor and Advisory do not. Costs are estimates from typical UK parts prices — see how they are built.
What testers noted without failing the car
Advisories are the early warnings — the same parts a year or two before they fail. Reading them is how you tell a car that has been maintained from one that has been patched.
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Tread depth below requirements of 1.6mm Tyres | Advisory | 10.7% | £45–95 |
| Brake pads less than 1.5 mm thick Brakes | Advisory | 8.3% | £18–45 |
| Pins and bushes pin or bush excessively worn Suspension | Advisory | 6.0% | £40–150 |
| Swivel pins and bushes swivel pin and/or bush excessively worn Suspension | Advisory | 6.0% | £40–150 |
| Has a tear, caused by separation or partial failure of its structure Tyres | Advisory | 4.8% | £45–95 |
| Linkage pins and bushes pin or bush excessively worn Suspension | Advisory | 2.4% | £40–150 |
Pass rate by mileage
| Mileage | Tests | Pass rate | Median odometer |
|---|---|---|---|
| 0-30k | 2 | 50.0% | 29,112 mi |
| 30-60k | 47 | 89.4% | 45,803 mi |
| 60-90k | 28 | 89.3% | 72,516 mi |
| 90-120k | 3 | 66.7% | 109,194 mi |
| 120k+ | 4 | 100.0% | 156,430 mi |
Source: 84 recorded tests on this vehicle-year. Every row above is recomputed from the same DVSA extract as the rest of the page — see the methodology.
2015 Sienta MOT questions
What is the MOT pass rate for a 2015 Toyota Sienta?
88.1% of the 84 2015 Toyota Sienta tests in this dataset passed, against a national average of 82.1% for cars first used in 2015. First-attempt pass rate: 86.7%.
What are the most common MOT failures on a 2015 Toyota Sienta?
The three most recorded items are position lamp incorrect colour (3.57%), joints constant velocity boot severely deteriorated (2.38%), linkage ball joint dust cover ball joint dust cover no longer prevents the ingress of dirt (2.38%). Percentages are the share of tests on this vehicle that recorded the item.
Does mileage affect the 2015 Toyota Sienta MOT pass rate?
Yes. Cars under 30,000 miles passed 50.0% of the time, falling to 100.0% for those over 120,000 miles. The median 2015 Toyota Sienta in this dataset had covered 56,749 mi.
Which fuel type is most reliable for a 2015 Toyota Sienta?
Hybrid: 85.7% pass rate across 56 tests. Petrol: 92.9% pass rate across 28 tests. Shares are of the tests on this vehicle that recorded each fuel type.