Pass rate
72.1%
Below average — 0.1 pts behind the 72.2% that cars this age and mileage manage.
Across 369 recorded tests.
Typical repair bill £46–£119
2004 Daihatsu Sirion MOT pass rate
- 2004
- typical 65,650 mi
Most common fault
Suspension
23.8% of faults · 21.0% nationally
mostly worn arm bushes, split ball-joint boots and broken coil springs.
Which year to buy
- Best 2010 78.2% pass
- Avoid 2001 66.9% pass
Across the 11 years on record, a spread of 11.3 points. See every year →
- First-attempt pass
- 65.9%
- Typical mileage
- 66k mi
The 2004 Daihatsu Sirion MOT pass rate is 72.1% of its MOT tests — about what its age and mileage predict. Suspension is the biggest single reason it fails, at 23.8% of what testers record.
Check your postcode
MOT pass rates are national — type your postcode to see how Daihatsu Sirion does in your corner of the country.
Expert verdict
Fewer problems with tyres
Tyres are 11.3% of this car’s recorded faults, against 19.8% nationally — the mirror image of the usual story on a car of this age.
- Based on a small sample. 369 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 Daihatsu Sirion? Get an email when these numbers change .
How does the 2004 Daihatsu Sirion compare?
Cars of this age and mileage average 72.2%, so this figure is 0.1 points behind what its age and mileage predict. On a first attempt, before any retests, the figure drops to 65.9%. The median 2004 Daihatsu Sirion in this dataset had covered 65,650 mi.
Pass rates also shift with the test month: tests recorded October–March passed 71.0% of the time, April–September 73.8%.
The single most recorded failure item is "Ball joint dust cover severely deteriorated", noted on 9.21% of tests.
- 369 recorded tests behind this page.
- 72.1% overall pass rate, 65.9% on a first attempt.
- Across every year of the Daihatsu Sirion, the average is 75.0% — best year 2010 (78.2%), worst 2001 (66.9%).
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
- 369
- Typical mileage (median)
- 65,650 mi
- Make and model
- Daihatsu Sirion
- Updated
- 2026-11-05
Source: DVSA anonymised MOT test data (2023–2025), OGL v3.0.
Top part to budget for
Ball Joint
Usually a DIY or independent-garage job.
Does mileage affect the Sirion MOT pass rate?
Pass rate by odometer reading. Bar lengths start at 59% so small gaps stay visible.
Regional pass rates for the Sirion
| Region | Tests | Pass rate |
|---|---|---|
| South East | 87 | 77.0% |
| South West | 76 | 67.1% |
| Yorkshire | 47 | 66.0% |
| East of England | 38 | 57.9% |
| West Midlands | 37 | 81.1% |
| East Midlands | 27 | 74.1% |
| London | 24 | 87.5% |
| North West | 17 | 76.5% |
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 2004 Sirion
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 2004 Sirion
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 suspension joints 9.2% of tests
“ball joint dust cover severely deteriorated”
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 corrosion 8.7% of tests
“component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength”
Look under the sills, around the jacking points and where the suspension mounts meet the body. Flaking, holed or crumbly metal fails; a brown stain on sound metal does not.
-
Check the lights 4.6% of tests
“malfunction indicator lamp inoperative or indicates a malfunction”
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.
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 2004 Sirion through its MOT
Across the 10 items that are recorded most often on this model, the average repair comes to £46–£119 — and 46% of those repairs are parts that cost under £30.
- Average repair across the 10 common items
- £46–£119
- Cheapest common item: malfunction indicator lamp inoperative or…
- £3–£12
- Dearest common item: component mounting prescribed areas…
- £180–£450
- Common items a careful owner can do at home
- 80%
- Repairs that still cost under £30
- 46%
Estimates from typical UK parts prices, weighted by how often each item appears in 369 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 Sirion, side by side
11 model years on record, from 2000 to 2010. Across them the pass rate runs from 66.9% to 78.2% — a spread of 11.3 points. The bar under each year is the item that failed it most often.
- 2000 68.3% ball joint dust cover severely…
- 2001 66.9% ball joint dust cover severely…
- 2002 73.1% ball joint dust cover severely…
- 2003 74.0% ball joint dust cover severely…
- 2004 72.1%ball joint dust cover severely…
- 2005 72.4% ball joint excessively worn
- 2006 73.5% ball joint excessively worn
- 2007 75.4% ball joint excessively worn
- 2008 75.9% ball joint excessively worn
- 2009 77.6% ball joint excessively worn
- 2010 78.2% ball joint excessively worn
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 2004 Daihatsu Sirion 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 2004 cars with a similar record
- Audi A2 72.0%
- Nissan Micra 72.2%
- Ford Fiesta 71.9%
- Honda Jazz 72.3%
- Volvo V70 71.7%
- Honda Civic 72.5%
Closest pass rates among 2004 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 2004 Daihatsu Sirion 10 failure items · 6 advisories · 10 inspection categories · mileage brackets · all of it in the page, none of it above the fold
Every inspection category
Shares of the 1,007 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 |
|---|---|---|---|---|
| Suspension | 244 | 23.80% | 20.98% | +2.82 |
| Brakes | 201 | 19.60% | 20.89% | −1.29 |
| Lamps, reflectors and electrical equipment | 137 | 13.40% | 12.21% | +1.19 |
| Tyres | 116 | 11.30% | 19.76% | −8.46 |
| Body, chassis, structure | 93 | 9.10% | 5.57% | +3.53 |
| Noise, emissions and leaks | 69 | 6.70% | 5.52% | +1.18 |
| Non-component advisories | 55 | 5.40% | 4.18% | +1.22 |
| Visibility | 49 | 4.80% | 4.97% | −0.17 |
| Identification of the vehicle | 25 | 2.40% | 1.76% | +0.64 |
| Seat belts and supplementary restraint systems | 18 | 1.80% | 0.82% | +0.98 |
The exact failure items, in the tester's words
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Ball joint dust cover severely deteriorated Suspension | Minor | 9.2% | £18–45 |
| Component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength Suspension | Major | 8.7% | £180–450 |
| Malfunction indicator lamp inoperative or indicates a malfunction Noise, emissions and leaks | Major | 4.6% | £3–12 |
| Registration plate lamp(s) inoperative in the case of multiple lamps or light sources Lamps, reflectors and electrical equipment | Minor | 3.5% | £5–20 |
| Headlamp lens slightly defective Lamps, reflectors and electrical equipment | Minor | 3.0% | £5–25 |
| Position lamp not working Lamps, reflectors and electrical equipment | Major | 3.0% | £5–25 |
| Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt Steering | Minor | 3.0% | £18–45 |
| Wipers does not clear the windscreen effectively Visibility | Major | 3.0% | £8–22 |
| Stop lamp not working Lamps, reflectors and electrical equipment | Major | 2.7% | £3–12 |
| Exhaust system has a major leak of exhaust gases Body, chassis, structure | Major | 2.4% | £45–120 |
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 |
|---|---|---|---|
| Rigid brake pipes excessively corroded Brakes | Advisory | 17.3% | £80–180 |
| Tread depth below requirements of 1.6mm Tyres | Advisory | 13.3% | £45–95 |
| Has a tear, caused by separation or partial failure of its structure Tyres | Advisory | 12.5% | £45–95 |
| Non-component advisories Fuel Pipe/s corroded Non-component advisories | Advisory | 11.1% | £180–450 |
| Component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength Suspension | Advisory | 8.9% | £180–450 |
| Pins and bushes pin or bush excessively worn Suspension | Advisory | 7.9% | £40–150 |
Pass rate by mileage
| Mileage | Tests | Pass rate | Median odometer |
|---|---|---|---|
| 0-30k | 18 | 77.8% | 24,207 mi |
| 30-60k | 148 | 71.6% | 49,529 mi |
| 60-90k | 129 | 71.3% | 74,998 mi |
| 90-120k | 55 | 67.3% | 102,783 mi |
| 120k+ | 19 | 89.5% | 145,768 mi |
Source: 369 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.
2004 Sirion MOT questions
What is the MOT pass rate for a 2004 Daihatsu Sirion?
72.1% of the 369 2004 Daihatsu Sirion tests in this dataset passed, against a national average of 72.2% for cars first used in 2004. First-attempt pass rate: 65.9%.
What are the most common MOT failures on a 2004 Daihatsu Sirion?
The three most recorded items are ball joint dust cover severely deteriorated (9.21%), component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength (8.67%), malfunction indicator lamp inoperative or indicates a malfunction (4.61%). Percentages are the share of tests on this vehicle that recorded the item.
Does mileage affect the 2004 Daihatsu Sirion MOT pass rate?
Yes. Cars under 30,000 miles passed 77.8% of the time, falling to 89.5% for those over 120,000 miles. The median 2004 Daihatsu Sirion in this dataset had covered 65,650 mi.
Does the season affect the 2004 Daihatsu Sirion MOT pass rate?
Tests recorded in the winter months (October–March) passed 71.0% of the time; summer months (April–September) passed 73.8%. Brakes, tyres and lights are tested harder in bad weather, but the difference is small on most models.