Daihatsu Sirion MOT Pass Rate & Official DVSA Failure Statistics

Daihatsu Sirion MOT History and Failure Rates vs UK National Average

The Daihatsu Sirion passed on its first attempt in 68.7%, and its overall record sits −6.0 percentage points below the national average for all cars. These figures come from every recorded DVSA MOT test for the Daihatsu Sirion in the 2023–2025 data: 22,729 tests across 11 model years (2000–2010). A test still carries exactly one pass or fail verdict.

Figures are computed from every recorded DVSA test for this model in the 2023–2025 data.

Most Common Daihatsu Sirion MOT Problems by Failure Category

Every MOT failure a tester records belongs to one inspection section of the DVSA manual. For the Daihatsu Sirion, the Suspension section leads the record — the breakdown below shows where the recorded failures cluster, then the exact strings behind the three biggest sections.

Shares are over the Daihatsu Sirion's recorded defect strings, merged across its year pages.

Top Recorded Daihatsu Sirion DVSA MOT Test Statistics & Defect Descriptions

The descriptions below are the exact DVSA failure strings testers recorded most often for the Daihatsu Sirion, each with how many of the model's 22,729 tests it was noted on.

• "Ball joint excessively worn" (Major) — noted on about 1,660 Daihatsu Sirion tests, 7.3% of the model's MOT record.
• "Headlamp lens slightly defective" (Minor) — noted on about 1,286 Daihatsu Sirion tests, 5.7% of the model's MOT record.
• "Joints constant velocity boot severely deteriorated" (Minor) — noted on about 995 Daihatsu Sirion tests, 4.4% of the model's MOT record.
• "Windscreen damaged but not adversely affecting driver's view" (Minor) — noted on about 555 Daihatsu Sirion tests, 2.4% of the model's MOT record.
• "Registration plate lamp(s) inoperative in the case of multiple lamps or light sources" (Minor) — noted on about 539 Daihatsu Sirion tests, 2.4% of the model's MOT record.
• "Wipers does not clear the windscreen effectively" (Major) — noted on about 518 Daihatsu Sirion tests, 2.3% of the model's MOT record.

Best and Worst Daihatsu Sirion Model Years by Pass Rate

The strongest Daihatsu Sirion model year on record is 2010 (78.2% across 403 tests), and the weakest is 2001 (66.9%). The gap between them is 11.3 points. Years with fewer than 50 recorded tests are excluded, so these are the years with enough MOT history to mean something.

Daihatsu Sirion reliability is improving in the DVSA data — the pass rate moves about 1.2 points a year across the most recent model years shown above.

Newest model year first. Only years with at least 50 recorded tests are listed.

Pre-MOT Inspection Checklist for Daihatsu Sirion Owners

These checks follow this Daihatsu Sirion's own most-recorded failure strings, starting with what a tester is most likely to flag on a Daihatsu Sirion.

• the suspension joints — “ball joint excessively worn”

  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.

• the lights — “headlamp lens slightly defective”

  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.

• the windscreen — “windscreen damaged”

  Check the driver’s side of the screen within the swept area for chips and cracks; anything larger than 10mm in the driver’s central view is a fail. Most chips can be resin-repaired for far less than a new screen.

Derived from the DVSA failure strings testers recorded for the Daihatsu Sirion. A check that finds nothing means the item is likely fine, not that the test is guaranteed.

Frequently Asked Questions: Daihatsu Sirion MOT & Reliability