2013 Hyundai I20 1.2L Petrol · ND63 GDU

A pattern of chassis and brake-line corrosion is the defining mechanical concern with this 2013 Hyundai i20, with the most recent assessment on 6 October 2025 showing a pass alongside five advisories, four of which relate to corroded rear brake pipes both before and after the nearside and offside flexible hoses. The 2025 test had an associated fail on the same date, indicating that an item was identified and subsequently rectified, after which the car returned the same day or shortly after with a pass. The rear brake pipe corrosion advisories are not a one-off; they were first flagged in October 2024 and have now worsened or expanded across both rear circuits, suggesting progressive external corrosion of the rigid brake lines, a common issue on older cars operating in salt-laden environments where underseal protection has degraded. Compounding the chassis concerns, the 2023 test recorded multiple front-end advisories including play in both front anti-roll bar ball joints, both front track rod end ball joints, slight free play in the steering rack, and surface corrosion on the front Macpherson strut top mounts, indicating a front suspension and steering assembly that was already showing fatigue at that point and which, at over 64,000 miles and 13 years of age, is highly likely to have advanced further even without further advisories being recorded. The overall trajectory is one of slowly accumulating wear rather than acute failure, but the rate at which brake pipe corrosion is being identified across consecutive tests is the most pressing deterioration trend. With 64,820 miles recorded over a 13-year life, this i20 has averaged approximately 4,986 miles annually, a notably low figure that places it well below typical UK driving patterns for a vehicle of this vintage. MOT tests have been conducted at consistent yearly intervals between 2023 and 2025, confirming the car has remained in continuous use and has not been laid up for extended periods, which is favourable for component longevity because standing can accelerate corrosion of brake discs, seizure of calipers and degradation of flexible brake hoses. The relatively gentle mileage accumulation reduces wear on major drivetrain components and helps explain why brake pads have only recently begun to show thinning, with nearside and offside front pads flagged as wearing thin in 2024 rather than having been replaced multiple times previously. However, low annual mileage combined with 13 winters of road exposure also means that external corrosion protection on the underbody and brake lines has had prolonged opportunity to deteriorate, which is consistent with the recurring brake pipe advisories and the strut top mount corrosion noted in 2023. A prospective buyer should treat the rear brake pipe corrosion advisories as the priority inspection item, as corroded rigid brake lines are a safety-critical MOT failure item once they are deemed excessively weakened, and replacement of the rear axle pipework, or the entire rear brake line set, can run into several hundred pounds depending on whether the pipes are available as separate sections or require fabrication. On a test drive, listen for any scraping or metallic rattle from the rear underbody over bumps, which can indicate a pipe that has lost its protective coating, and check that the brake pedal feels firm without excessive sponginess or a noticeable change in travel. The front suspension and steering components flagged in 2023 should be carefully re-evaluated; on test, pay attention to any knocking or clonking from the front wheels over speed humps or uneven surfaces, vagueness or looseness around the straight-ahead position, uneven or excessive tyre wear across the front axle, and any knocking or clicking through the steering when turning on full lock at low speed, all of which would suggest the anti-roll bar drop links, track rod ends or steering rack have deteriorated further since 2023. The tyre advisories recorded in 2025 should be addressed regardless of any other findings, as a nearside rear tyre with damage, cracking or perishing and an offside front tyre worn close to the legal limit both represent immediate replacement items; visually inspect all four tyres for tread depth above 1.6mm, even sidewall wear, and any signs of sidewall cracking or bulges, particularly on the rear pair which are subject to additional ageing stress on a low-mileage car that may have stood for periods. On the test drive, verify that the car tracks straight without pulling to either side under gentle braking, that the ABS or stability control warning light does not illuminate, and that the steering returns smoothly to centre without requiring correction. Given the documented chassis corrosion trend and the age of the vehicle, it would be prudent to arrange an underside inspection on a ramp prior to purchase, allowing visual confirmation of the brake line condition, Macpherson strut turrets, subframe mounting points and any structural corrosion, none of which can be reliably assessed from kerbside viewing alone.