At a Glance
The Toyota Sienta has 0 identified common problems across 3 generations (2003–present) and suspension the most common problem category. Based on 897 MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on a specific model than the UK average — confirmed at 99% statistical confidence. Read our DVSA MOT data methodology →
Below: generation-by-generation comparison of Toyota Sienta common problems, MOT failure types, and pass-rate data drawn from DVSA records. Click any generation to see fuel- and engine-specific fault patterns, mileage-banded repair guidance, and the most common MOT failures testers record.
MOT Tests & Failures by Generation
Toyota Sienta generations by MOT tests, failures, and identified problems from DVSA data
Hover over each bar for a full breakdown. Tap any bar to view that generation's problems.
Showing total MOT tests, failures, and known problems per make. Hover over each bar for a full breakdown.
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Tell Us About Your Problem
Help other Toyota Sienta owners — report a problem and we'll add it to the database
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Browse Toyota Sienta Generations
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Most Common Toyota Sienta MOT Failures
Every reason Toyota Sienta vehicles fail their MOT, ranked by frequency. Select an individual year to see only that year’s failures, or stay on ‘All time’ for the combined picture across our 20 years of DVSA data. Scroll inside the table for the full list.
| # | Failure | % of failures |
|---|---|---|
| 1 | Tyre condition | 11.63% |
| 2 | Rear fog lamp not working | 9.77% |
| 3 | Wiper blades deteriorated | 9.77% |
| 4 | Position lamp not working | 8.37% |
| 5 | Headlamp fault | 6.51% |
| 6 | Suspension joint or bush worn | 6.05% |
| 7 | Tyre tread depth below limit | 5.58% |
| 8 | Brake pads or linings worn | 4.65% |
| 9 | Windscreen washer not working | 4.19% |
| 10 | Driveshaft fault | 3.72% |
| 11 | Number plate lamp not working | 3.72% |
| 12 | Fog lamp not working | 3.26% |
| 13 | Exhaust system fault | 2.79% |
| 14 | Ball joint dust cover split | 2.79% |
| 15 | Stop lamp not working | 1.86% |
| 16 | Indicator fault | 1.40% |
| 17 | Bumper damaged or insecure | 0.93% |
| 18 | Dip switch fault | 0.93% |
| 19 | Spark ignition emissions above threshold | 0.93% |
| 20 | Tyre size or type not matched | 0.93% |
| 21 | Windscreen damage affecting view | 0.93% |
| 22 | Headlamp aim defect | 0.93% |
| 23 | Suspension linkage fault | 0.93% |
| 24 | Airbag warning light on | 0.47% |
| 25 | Anti-roll bar worn or corroded | 0.47% |
| 26 | Axle beam corroded or cracked | 0.47% |
| 27 | Battery loose or leaking | 0.47% |
| 28 | Body security fault | 0.47% |
| 29 | Bonnet catch or hinge fault | 0.47% |
| 30 | Brake performance below minimum | 0.47% |
| 31 | Front lamp not working | 0.47% |
| 32 | Front suspension joint worn | 0.47% |
| 33 | Headlamp washer not working | 0.47% |
| 34 | Parking brake performance below minimum | 0.47% |
| 35 | Rear reflector damaged or missing | 0.47% |
| 36 | Reversing lamp switch fault | 0.47% |
| 37 | Seat belt condition | 0.47% |
| 38 | Suspension arm worn or corroded | 0.47% |
| 39 | King pin or swivel pin worn | 0.47% |
Showing all 39 reasons — scroll inside the table for the full list.
Toyota Sienta MOT Failures by Category
Total MOT failure occurrences for the Toyota Sienta, grouped by category. Same data as the failures table above — just sliced by category instead of fault title. Hover a slice for the top failures in each category.
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Frequently Asked Questions
What are the most common Toyota Sienta problems?
Based on analysis of 897 Toyota Sienta MOT tests from DVSA data, we have 0 identified common problems across 3 generations. Suspension is the most common problem category.
Which Toyota Sienta generation has the most problems?
We haven't identified significant problem patterns specific to any single generation of the Toyota Sienta yet — either this is a well-engineered model across all its generations, or the sample size per generation is still small. Check individual generation pages for MOT failure and advisory breakdowns.
How is this data calculated?
We analyse anonymised DVSA MOT test records under the Open Government Licence. An issue is classified as a "Common Problem" when it occurs significantly more often on a specific model than the UK average, confirmed at 99% statistical confidence. Read the full methodology page for details.
Can I report a problem with my Toyota Sienta?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Toyota Sienta owners spot problems early. All submissions are reviewed before being added to the public database.
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