2012 Citroen C1 1.0L Petrol · DF12 LRZ

The defining mechanical narrative for this 2012 Citroen C1 is one of a rolling pattern of recurring advisories focused on the exhaust system, rear brake pipework, and front anti-roll bar linkage, with one notable failure event in late 2024. The most recent test on 17 November 2025 recorded a pass but continued this trend, flagging a slight blow from the offside rear exhaust and corrosion or contamination on the rear brake pipe. Looking at the broader trajectory, the exhaust gas leak advisory has appeared in three consecutive annual tests from 2023 to 2025, and the rear brake pipe advisory has now been flagged twice within twelve months, suggesting a slowly worsening condition rather than isolated wear. The single failure in November 2024, caused by a dangerously worn offside front anti-roll bar pin or bush alongside an excessively worn nearside equivalent, is particularly significant. The fact that the offside front linkage was already flagged as worn but within tolerance in 2023, became dangerous by November 2024, and now passes again indicates the component was likely replaced at that point, but it underlines that the front suspension bush wear on this vehicle is accelerated relative to normal expectations for a small city car. At 116,003 miles over approximately fourteen years of age, this C1 has accumulated around 8,286 miles annually, which is broadly typical for a vehicle of its class and age, and there are no significant gaps in the MOT testing record that would imply long periods off the road. Mileage progression appears consistent year on year, suggesting regular if modest use. Mechanically, this kind of steady urban mileage pattern tends to be kinder to major drivetrain components than high-mileage motorway use, but it does expose suspension, braking, and underbody components to the rigours of potholes, kerbs, and short-trip thermal cycling. The fact that wear items like anti-roll bar pins, brake lines, and exhaust mountings are already presenting issues indicates the undercarriage is seeing real-world stress and confirms that a careful physical inspection underneath the car is warranted, particularly around the front subframe and rear axle line. A prospective buyer should pay close attention to the front suspension on a test drive. Listen for clonking or knocking noises from the front end, particularly when traversing speed bumps, potholes, or during sharp low-speed direction changes, as these are classic indicators of worn anti-roll bar drop links and bushes. The nearside and offside should be checked by hand for any vertical or rotational play in the anti-roll bar pins, and the bushes themselves should be inspected for cracking, perishing, or splitting. Any looseness would suggest the replacement parts used post-failure may already be settling or that adjacent components such as the anti-roll bar itself or its mounting brackets could be fatigued. Steering feel should also be monitored for any vagueness, knocking through the wheel, or uneven self-centring, all of which can accompany worn front suspension geometry on the C1 platform. The rear brake pipe corrosion advisory is a more serious longer-term concern that warrants direct scrutiny. Underneath the vehicle, the brake lines running along the underbody and rear axle should be inspected for surface rust, pitting, or any sign of corrosion weeping through the pipe wall, particularly at the unions and brackets where moisture and road salt collect. A thorough test should also include a firm brake pedal application at speed to check for a spongy feel, any pulling to one side under heavy braking, or excessive pedal travel, all of which could indicate compromised brake hydraulic integrity. The recurring exhaust leak advisories suggest the centre and rear sections have been weeping gradually. On a cold start, listen for an uneven or louder than expected exhaust note, ticking from the middle or rear sections, or any smell of exhaust gases inside the cabin, which would confirm the joints or flexi-section require attention. Finally, given the recurring tyre wear advisories on the front pair, an alignment check should be requested, as uneven or rapid edge wear on the C1 frequently points to worn front suspension components or geometry out of specification, both of which connect directly to the anti-roll bar issues already documented in the MOT history.