Daihatsu Sirion

Reliability, estimated running costs, and MOT data across 13 model years from 10,921 MOT tests in 2024.

Avg Pass Rate

70%

Total Tests

10,921

Highest Pass Rate

2010 (81%)

Years Covered

About the Daihatsu Sirion

The Daihatsu Sirion was MOT tested 10,921 times in 2024 (DVSA data, retests included) across 13 model years (1998 to 2010), with an average pass rate of 70%. That's 12 points below the average of 82% across all models in our data, so check the year-by-year data carefully before buying. Our records list petrol versions.

Best and Worst Years

Of the years with at least 100 tests, the 2010 model has the highest pass rate at 81% from 175 tests. The 1999 model has the lowest at 60%. With a 21 point gap, the year you choose makes a real difference. Newer cars usually pass more often simply because they are younger.

Reliability Trend

Newer Daihatsu Sirions pass their MOT more often than older ones, by 8 percentage points on average, which is mostly down to age and wear.

Mileage Across Years

The oldest model in our data (1998) averages 61,601 miles, while the newest (2010) averages 70,810 miles.

Estimated Running Costs

Fuel (Petrol, 1298cc)

£1,398

Road Tax

£200

MOT Test

£55

Predicted Repairs

£350

Total per year£2,003

Per month£167/mo

Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.

Full 2010 details

How reliable is the Daihatsu Sirion?

vs average of all models-12% (82% avg)

vs Daihatsu brand average-1% (71% avg)

Best to worst year spread21 percentage points

Reliability trendImproving over years

Daihatsu Sirion by Year

Click any year to see detailed running costs, reliability data, and comparisons with similar cars.

Year	Pass Rate	Tests	Avg Mileage
2010	81%	175	70,810 mi
2009	76%	1,506	72,234 mi
2008	74%	3,129	73,060 mi
2007	73%	2,462	74,433 mi
2006	72%	1,258	78,827 mi
2005	71%	1,323	79,928 mi
2004	67%	201	72,315 mi
2003	67%	199	74,428 mi
2002	72%	255	72,302 mi
2001	66%	120	72,520 mi
2000	62%	99	63,600 mi
1999	60%	130	58,053 mi
1998	64%	64	61,601 mi

Questions about the Daihatsu Sirion

Is the Daihatsu Sirion reliable?

Across its 13 model years in our data (1998 to 2010), the Daihatsu Sirion averages a 70% MOT pass rate, from 10,921 tests (DVSA MOT data for tests in 2024, retests included). That's 12 points below the average of 82% across all models in the same data. The 2010 model has the highest pass rate of the years with at least 100 tests, at 81%.

Which year Daihatsu Sirion has the best MOT pass rate?

Of the years with at least 100 tests, the 2010 Daihatsu Sirion has the highest MOT pass rate at 81%, while the 1999 model has the lowest at 60%, a 21 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.