Toyota Sienta Reliability, MOT Pass Rate & Common Faults
Free Toyota Sienta car check
Is the Toyota Sienta reliable? We analysed 1,656 real MOT tests across 442 vehicles to find out.
Got a specific Toyota Sienta? Enter the reg for a free check:
The Toyota Sienta is above average for reliability based on real UK MOT data. Here's everything you need to know before buying a used Toyota Sienta.
Toyota Sienta Number Plates
Number plates registered to a Toyota Sienta. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Toyota Sienta MOT Pass Rate by Year
How likely is a Toyota Sienta to pass its MOT? Here's the pass rate for each registration year, newest first.
Toyota Sienta Problems — What Goes Wrong?
The most common reasons a Toyota Sienta fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Toyota Sienta Common Faults & Problems
These are the most common serious faults found on Toyota Sienta models during MOT testing — flagged as dangerous or major failures that need immediate attention.
Toyota Sienta Mileage — What's Normal?
How many miles does a typical Toyota Sienta owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Toyota Sienta MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Toyota Sienta year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2020 | 121 | 81.8% | 35,238 | 55,367 | 88,167 |
| 2019 | 126 | 89.7% | 30,052 | 50,338 | 77,990 |
| 2018 | 138 | 88.4% | 30,331 | 42,348 | 58,786 |
| 2017 | 321 | 86.3% | 46,363 | 60,959 | 96,350 |
| 2016 | 278 | 88.1% | 42,324 | 58,433 | 81,068 |
| 2015 | 147 | 83.0% | 49,467 | 66,278 | 94,226 |
| 2005 | 68 | 83.8% | 72,388 | 114,301 | 130,298 |
| 2004 | 82 | 80.5% | 75,469 | 107,806 | 134,409 |
How Long Does a Toyota Sienta Last?
Based on 442 Toyota Sienta vehicles on UK roads.
Toyota Sienta Mileage Distribution
Total mileage recorded across all Toyota Sienta MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Toyota Sienta
Based on MOT pass rates across all registration years with sufficient test data.
89.7% MOT pass rate from 126 tests
80.5% MOT pass rate from 82 tests
The best year to buy a used Toyota Sienta is 2019, which has the highest MOT pass rate at 89.7% across 126 tests. The 2004 model year has the lowest pass rate at 80.5% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Toyota Sienta Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Toyota Sienta THIS CAR | 85.1% | 1,656 | 64,438 mi | 22 yrs |
| Toyota Yaris | 77.7% | 9,038,234 | 54,896 mi | 27 yrs |
| Toyota Corolla | 75.4% | 4,239,724 | 75,409 mi | 36 yrs |
| Toyota Avensis | 75% | 3,497,866 | 89,776 mi | 28 yrs |
| Mbk Skyliner | 74% | 998 | 13,145 mi | 25 yrs |
Compared to the Toyota Yaris (77.7% pass rate) and the Toyota Corolla (75.4% pass rate), the Toyota Sienta outperforms both on MOT reliability.
Found a Toyota Sienta you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Toyota SientaShould you buy a used Toyota Sienta?
The Toyota Sienta has an overall MOT pass rate of 85.1% across 1,656 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common failure point is fog lamp missing with 9 recorded occurrences. Check for this on any test drive or pre-purchase inspection.
On the safety side, the most frequently flagged dangerous fault is tyre tread depth below requirements of 1.6mm. Dangerous faults cause an immediate MOT failure and mean the vehicle is not roadworthy until repaired. If you're viewing a Toyota Sienta with an expired or recently passed MOT, ask the seller whether any dangerous faults were found and fixed during the last test.
A typical Toyota Sienta owner drives around 6,426 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Toyota Sienta models stay on UK roads for around 22 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.