2010 Citroen C1 1.0L Petrol · YA10 AYC

A consistent theme emerges across this 2010 Citroen C1's MOT record: chronic corrosion of the rear brake pipes and, more recently, the rear subframe. The vehicle passed its most recent test on 27 October 2025, but this was achieved with five advisories, two of which relate to both nearside and offside rear brake pipes being corroded and covered in grease or other material. Notably, the nearside front to rear brake pipe corrosion was first flagged on 28 October 2024, the same day the car failed its MOT on a nearside headlamp aim issue, and the rear subframe corrosion was newly identified in the 2025 test. The progression from a single brake pipe advisory in 2023 to multiple pipe advisories plus subframe involvement in 2025 suggests an underlying chassis corrosion pattern that warrants close physical inspection rather than reliance on the pass certificate alone. Earlier history was notably lighter, with only minor mirror defects recorded in 2022 and a defective exhaust mounting in 2023, indicating that the bulk of mechanical concerns have surfaced in the final third of the recorded test history. With 97,621 miles on the odometer over a 16-year life, this C1 has averaged roughly 6,100 miles annually, which is broadly typical for its age and segment. There are no extended gaps in the MOT timeline that would suggest long periods off the road, and the mileage accumulation appears reasonably steady based on the consecutive annual tests. At this level of use, the mechanical priority shifts away from high-wear engine components and towards age-related deterioration of underbody items, exactly as the advisory record demonstrates. The recurring brake pipe and subframe findings are consistent with a vehicle that has spent many years exposed to winter road salt, particularly in a chassis region that typically traps moisture and debris. A prospective buyer should treat the rear brake pipe corrosion advisories as a near-term budgeting item. Brake pipes on small city cars of this era are known to corrode from the inside out where they run along the underbody and through the rear subframe area, and once both sides are flagged the cost of a full pipe replacement including any necessary rear brake hydraulic work can become significant. On inspection, the pipes should be physically examined with a torch for visible pitting, flaking, or wet brake dust accumulation at joints and mounting clips, and the handbrake cables and rear calipers should be checked for seized mechanisms given the high mileage. The subframe advisory should be examined by placing the vehicle on a ramp or over a pit, looking for distortion, deep scaling, or thinning of the metal around mounting points, tow eyes, and suspension arm attachments, as the assessment of "not seriously weakened" can shift between MOTs depending on inspector judgment and progression of corrosion. On a test drive, focus on symptoms that would betray the underbody deterioration already hinted at by the records. Listen for clunks or knocks from the rear suspension over uneven surfaces, which could indicate worn bushes or loose components exacerbated by subframe corrosion, and pay particular attention to the effectiveness and feel of the rear brakes, including any spongy pedal travel, binding after release, or pulling to one side under braking. The headlamp aim failure in late 2024 should be verified by checking that both dipped beams project a flat, symmetrical cutoff against a wall at the standard distance, as headlamp levelling motors and adjustment mechanisms on older C1s can drift out of specification. The exhaust mounting advisory from 2023 also warrants a physical check at the front flexible joint and rear hanger rubbers, as a collapsed mount can transmit vibration into the cabin and risk exhaust pipe contact with the underbody. Given the observed pattern, an independent pre-purchase inspection with the vehicle raised on a lift is strongly advisable before committing to purchase.