2011 Citroen C4 1.6L Diesel · SY11 CVB

The C4 presents a mixed but recently stabilising maintenance profile, with the most recent test on 15 September 2025 at 93,654 miles resulting in a pass. That said, the vehicle failed just two weeks earlier on 1 September 2025 at 93,630 miles, with a cluster of faults that suggests a period of neglect followed by rushed remedial work. The tester flagged excessively worn front suspension arm ball joints, rear inner brake pads below 1.5 millimetres, low coolant, chuffing injectors, and an oil leak. The fact that the oil leak advisory carried over into the pass result indicates it was never fully rectified, merely deemed not excessive enough to fail. The suspension and brake faults were clearly addressed between the two tests, which is positive, but the pattern of failing on core mechanical items and then passing shortly after raises questions about the depth and quality of the repairs. The mileage accumulation is broadly typical for a 2011 vehicle, averaging roughly 6,244 miles per year. The record shows a jump of approximately 5,160 miles between September 2023 and September 2024, then a further 4,369 miles to the September 2025 tests. There are no alarming gaps or sudden drops in recorded mileage, and the annual testing pattern has been consistent since at least 2023. The data is clean in terms of mileage continuity, with no obvious signs of clocking or long periods of inactivity. A buyer should focus the physical inspection on the front suspension and braking systems. The September 2025 failure for a worn offside front suspension arm ball joint is a significant structural wear item, and the replacement part should be verified for quality and correct installation. The rear brake pads were below minimum thickness at the same test, so the condition of the rear calipers, discs, and handbrake mechanism warrants close scrutiny. The persistent oil leak advisory across both September 2025 tests suggests a weeping rocker cover gasket or similar seepage that has not been properly addressed. The chuffing injectors noted at the earlier failure point to possible injector seal degradation or fuel delivery irregularity, which should be assessed under load. Coolant level warnings combined with injector noise could also point to a minor head gasket concern or simply a poorly bled cooling system, so a pressure test and coolant condition check are advisable.