2011 Citroen C1 1.0L Petrol · FT11 VSD

The 2011 Citroën C1 presents a mechanical profile dominated by a persistent rear brake pipe corrosion issue that recurs across multiple test cycles, punctuated by intermittent passes and two outright failures. The most recent MOT on 2026-08-17 returned a PASSED result, but this followed a pattern of three consecutive failures between 2023 and 2025, with the worst instance occurring in July 2024 when the danger rating included exposed ply or cords on the rear child seat adult belt. While the vehicle has stabilised to regular passes since early 2024—including a clean April 2024 test—the recurrence of rear brake pipe deterioration (notably near-side and off-side sections to the flex line) indicates a systemic sealing or corrosion problem rather than isolated wear. The overall trend is therefore one of fluctuating compliance with an underlying issue that requires resolution before relying on the current clearance. At 104,718 miles on a 2011 model, the car accumulates approximately 7,000 miles per annum, which aligns with typical usage expectations for this age group and suggests moderate daily or occasional use rather than heavy commercial deployment. There is a six-month gap between the 2023-08-11 failure and the 2024-08-09 pass, during which the vehicle remained roadworthy according to the MOT standard, though the absence of intermediate testing does not guarantee continued reliability. The consistent presence of rear brake pipe corrosion across four separate test years demonstrates that the issue is not transient but rather embedded in the vehicle's rear axle assembly or surrounding chassis protection. Given the modest yearly mileage, the brake system and related components may appear less degraded than their counterparts on higher-mileage vehicles, yet the repeated failure mode warrants immediate attention upon acquisition. The rear brake pipes themselves represent the primary concern, as the corroded sections near-side and off-side to the flex line can leak hydraulic fluid under stress, leading to reduced braking performance and potential brake fluid contamination. During a test drive, listen for any hissing or wet noise emanating from the rear brake piping area, particularly when accelerating or braking hard, and check visually for fluid drips along the pipe length. The rear child seat fitting also merits scrutiny because the adult belt cannot be fully inspected through the mount, meaning the buckle routing and harness tension may be compromised even if the seat itself appears functional; verify that the belt path is accessible and that the seat can be removed and reinstalled without obscuring critical safety hardware. Both the near-side and off-side rear tyres have been recorded as worn close to the legal limit and exhibiting edge wear, suggesting possible weight transfer imbalance or uneven load distribution that should be confirmed by measuring tread depth and inspecting the contact patch shape under the vehicle. Additional test-drive observations should focus on how the car handles corners and deceleration, as worn tyres and potentially loose brake piping can manifest as a pulling sensation or vibration when the wheels are turned. The previously failed tests noted direction indicator failures, so while not present in the latest MOT, it remains worth confirming that all lights function correctly during operation. If the rear brake pipes are confirmed faulty, replacement is advisable as repair attempts on corroded metal tubing often prove ineffective and may simply delay the inevitable failure. The combination of recurring brake pipe corrosion, limited child seat inspection access, and borderline tyre wear means that a thorough physical inspection of these areas is essential before committing to purchase, especially given the vehicle's substantial remaining life expectancy based on its age and current mileage.