2002 Daihatsu Sirion 1.0L Petrol · DX52 UBG

The most recent MOT test on 2023-08-14—just under three years ago—shows this Daihatsu Sirion failed without any defects recorded, a pattern that has persisted across multiple tests since 2021. The lack of advisories or failures for specific components suggests the tester did not identify any critical issues during those inspections, though the absence of defects does not imply the vehicle was mechanically sound. The repeated failures without explanations are unusual, as even minor issues are typically flagged. This inconsistency raises questions about the thoroughness of testing or whether the vehicle was driven to the test centre in a condition that masked underlying problems. The trend is neither worsening nor improving—it is stagnant, with no evidence of proactive maintenance addressing wear or corrosion. The recorded mileage of 89,187 miles over 24 years indicates very light usage, averaging just 3,716 miles annually. This suggests the vehicle has spent extended periods stationary, which can accelerate deterioration of fluids, seals, and rubber components. The gap between tests—particularly the two failures in quick succession in August 2022 (87,540 and 87,555 miles)—implies either a scheduling oversight or a deliberate attempt to pass the test without addressing wear. Such low mileage also means consumables like brake pads, suspension bushes, and timing belt components may have exceeded their service intervals without replacement, increasing the risk of sudden failure. Given the lack of specific fault codes, an in-person inspection should prioritise critical areas prone to neglect in low-mileage vehicles. Focus on the suspension for worn or perished bushes, especially at the rear where binding or uneven wear is common in older Daihatsu models. Check brake discs for lateral runout or excessive thickness variation, as repeated failures without defects could indicate underlying caliper binding or warped rotors. Examine the exhaust system for corrosion at joints and the catalytic converter for blockages, which often go unnoticed until emissions tests fail. Structural integrity should be assessed for rust penetration in wheel arches, sills, and the subframe, as prolonged standing accelerates corrosion even in seemingly well-maintained vehicles. Fluid levels and condition—brakes, power steering, and engine oil—should be verified, as stagnation can lead to sludge or contamination.