2013 AUDI A31.6L DIESEL

The maintenance trend for this 2013 Audi A3 is worsening regarding structural corrosion, despite passing its most recent MOT on 13 November 2025 at 154,760 miles. The tester flagged corrosion on the central sub-frame mounts and rear suspension component mounting prescribed areas, noting that covers were fitted to the underside. While the vehicle remains roadworthy, the progression from zero defects in 2022 and 2023 to active structural corrosion in 2025 indicates a deterioration in underbody integrity that demands immediate physical inspection. Accumulating 154,760 miles over thirteen years yields an average of roughly 11,905 miles annually, a typical figure for this age. However, the mileage progression reveals a notable shift. Between October 2022 and November 2023, the car covered 8,216 miles, yet the subsequent twelve months to November 2024 saw only 3,817 miles before jumping to 8,867 miles by November 2025. Crucially, the recorded mileage has not advanced since the November 2025 test, suggesting the vehicle has been standing static for over seven months. Prolonged sitting exacerbates the corrosion issues flagged in the recent test. A buyer must thoroughly inspect the underbody and front suspension components before purchase. The tester noted severe deterioration of the offside front upper anti-roll bar ball joint dust cover in November 2024 at 145,893 miles, alongside a worn and pitted offside front inner brake disc. The 2025 test did not re-flag these specific items, but a clean test does not guarantee replacement, so a physical inspection of the ball joint and disc remains essential. More critically, the November 2025 test recorded corrosion on the central sub-frame mounts and rear suspension mounting areas. Underbody covers were fitted, which frequently trap moisture and accelerate rust. A buyer must remove these covers to assess the true structural integrity of the sub-frame and suspension mounting points, as severe corrosion here compromises the vehicle's structural safety.