Daihatsu Sirion MOT pass rate and common problems
66.0% of 8,519 Daihatsu Sirion MOT tests pass.
The Sirion's pass rate of 66.0% is in line with the average across all Daihatsu models, at 66.9%.
The Daihatsu Sirion passes 66.0% of the time, noticeably below the figure for the national average for cars (79.2%).
Own this Daihatsu Sirion?
This is the average across every Daihatsu Sirion in the dataset. Look up your own registration for its actual MOT history, and a free place to keep its maintenance records.
Have service invoices? Upload and keep them with your car’s history →
How to check and keep your Daihatsu’s service history →
Pass rate by vehicle age
Pass rate eases gradually with age, from 72.2% at 10–15 years to 65.4% at 15+ years.
| Vehicle age | Pass rate | Tests | Average mileage |
|---|---|---|---|
| 0–3 years | no tests recorded | 0 | no reading |
| 3–6 years | no tests recorded | 0 | no reading |
| 6–10 years | no tests recorded | 0 | no reading |
| 10–15 years | 72.2% | 813 | 71,030 miles |
| 15+ years | 65.4% | 7,706 | 73,427 miles |
Common MOT failure reasons for the Daihatsu Sirion
The most common reason the Daihatsu Sirion fails its MOT is suspension — present in 61.8% of failed tests, most often logged as "Ball joint excessively worn".
| Category | Share of failed tests | Example |
|---|---|---|
| Suspension | 61.8% | Ball joint excessively worn |
| Lamps, reflectors and electrical equipment | 44.8% | Not working |
| Brakes | 34.9% | Excessively corroded |
| Body, chassis, structure | 20.0% | Has a major leak of exhaust gases |
| Visibility | 16.1% | Does not clear the windscreen effectively |
| Tyres | 14.9% | Tread depth below requirements of 1.6mm |
| Noise, emissions and leaks | 14.6% | Lambda reading after 2nd fast idle outside specified limits |
| Steering | 10.8% | Ball joint has excessive play |
| Seat belts and supplementary restraint systems | 4.3% | Prescribed area strength or continuity significantly reduced |
| Identification of the vehicle | 1.2% | Inscription illegible |
Buying a used Daihatsu Sirion: what to check
These checks follow the Daihatsu Sirion’s own MOT record: the areas it fails on most often, and how that changes as the car gets older. None of them replaces a mechanic’s inspection, but they tell you where to look first.
The biggest drop in pass rate for the Daihatsu Sirion comes between 10–15 years and 15+ years old, from 72.2% to 65.4%. If you are looking at one in or just past that range, read its MOT history closely.
By mileage, the steepest fall is from 0–30,000 mi to 30,000–60,000 mi: 85.1% down to 72.5%. Mileage matters as well as age, so compare the car’s recorded mileages with its year.
1. Suspension
Recorded in 61.8% of failed Daihatsu Sirion MOTs.
Listen for knocks over bumps and speed humps, and check the car sits level. Push down on each corner: it should settle rather than keep bouncing.
2. Lights and electrics
Recorded in 44.8% of failed Daihatsu Sirion MOTs.
Walk round with the lights on: headlights (dipped and main), indicators, brake lights, fog light and number-plate lamp. Check the dashboard warning lights come on with the ignition, then go out once the engine starts.
3. Brakes
Recorded in 34.9% of failed Daihatsu Sirion MOTs.
On the test drive, the car should stop straight without pulling or juddering, and the handbrake should hold it on a slope. Look through the wheels for scored or heavily lipped discs.
4. Bodywork and corrosion
Recorded in 20.0% of failed Daihatsu Sirion MOTs.
Look underneath and along the sills for corrosion, especially near suspension and seat-belt mountings. Uneven panel gaps or mismatched paint can indicate accident repair.
5. Windscreen and wipers
Recorded in 16.1% of failed Daihatsu Sirion MOTs.
Look for windscreen chips and cracks in the driver’s line of sight, and check the wipers clear the screen and the washers work.
Check the car’s own MOT history. Averages describe the model, not the car in front of you. Look up its registration for past failures, advisories that were never fixed, and gaps or dips in the recorded mileage.
Ask for the service history. Invoices show what was done and when; a stamp alone shows less. See how to check Daihatsu service history and what a service history check can tell you.
Related Daihatsu models
- Daihatsu Terios — 64.8% pass rate
- Daihatsu Fourtrak — 68.3% pass rate
- Daihatsu Copen — 76.4% pass rate
- Daihatsu Charade — 63.1% pass rate
- Daihatsu Hijet — 67.7% pass rate
Frequently asked questions
- What is the MOT pass rate for the Daihatsu Sirion?
- 66.0% of Daihatsu Sirion MOT tests pass, based on 8,519 tests in the DVSA anonymised MOT tests and results dataset.
- What are the most common MOT failures for the Daihatsu Sirion?
- The most common reason the Daihatsu Sirion fails its MOT is suspension — present in 61.8% of failed tests, most often logged as "Ball joint excessively worn".
- What are the common problems with the Daihatsu Sirion?
- Going by its MOT results, the most common problem areas on the Daihatsu Sirion are suspension; lights and electrics; brakes.
- What should I check when buying a used Daihatsu Sirion?
- Start with the areas it most often fails its MOT on: suspension; lights and electrics; brakes; bodywork and corrosion; windscreen and wipers. Then check the specific car's MOT history by registration for failures, advisories and mileage, and ask the seller for service invoices.
- Does this show the Daihatsu Sirion's service history?
- No — this is MOT test data, which covers roadworthiness, not servicing. A service history is a separate record of maintenance work, which a specific car only has if its owner has kept it. See the Daihatsu service history guide for how to check and keep one.