2017 Mazda 6 2.2L Diesel · HT66 ONS

The Mazda 6’s MOT history reveals a concerning pattern of repeated failures with no recorded defects, a red flag that demands immediate scrutiny. The most recent test on 9 April 2026 at 150,448 miles failed for the second time in under a year, following a pass on 15 April 2025 at 141,247 miles. This inconsistency—paired with the absence of any documented faults—suggests either deliberate test evasion or systemic issues being overlooked. The fact that the vehicle passed in January 2024 at 129,718 miles before failing again just two days later at 129,715 miles implies either a temporary fix or a tester’s leniency, neither of which inspires confidence. Without visible defects, the failures point to either a deliberate circumvention of MOT standards or deeper, unrecorded mechanical neglect. The mileage accumulation is aggressive for a nine-year-old vehicle, averaging around 16,716 miles annually—a rate that accelerates wear on critical components. The gap between January 2024 (129,715 miles) and January 2025 (141,234 miles) covers roughly 11,500 miles in a year, while the stretch from April 2025 (141,247 miles) to April 2026 (150,448 miles) sees another 9,200 miles in just 12 months. This rapid mileage suggests either heavy use or potential odometer manipulation, though the latter would be harder to verify without service records. The lack of advisories or defects in any test further raises questions about whether the vehicle has been driven excessively hard or if its condition has been deliberately misrepresented. Given the absence of recorded faults, a buyer should prioritise a thorough inspection of structural integrity and hidden wear. Pay close attention to suspension components—coil springs, anti-roll bars, and bushings—since these often degrade under high mileage without leaving obvious MOT flags. Check for binding in the braking system, particularly the rear calipers, as this is a common failure point that can be overlooked in cursory tests. Exhaust emissions should also be scrutinised, as repeated passes without advisories may mask catalytic converter inefficiency or engine management issues. Finally, inspect for corrosion in wheel arches, sills, and suspension mounting points, as rust can compromise structural safety without triggering an MOT failure. The vehicle’s history demands a pre-purchase inspection by a qualified mechanic, ideally one specialising in Japanese models. The pattern of failures without defects is atypical and warrants deeper investigation into whether the car has been maintained to standard or if its true condition has been concealed. Without transparency in the MOT records, the risk of acquiring a vehicle with unresolved mechanical or safety issues remains significant.