2006 Citroen C4 1.6L Diesel · ML06 CVD

A pattern of chronic front-end wear dominates the MOT history of this 2006 Citroen C4, with steering and suspension components surfacing as advisories across multiple consecutive tests. The most recent examination on 25 March 2025 passed, but it recorded a severely deteriorated nearside front outer drive shaft CV boot alongside the same front track rod end ball joint play that was first flagged in 2024. That 2024 test also noted slight play in both front track rod ends, suggesting the wear is bilateral rather than an isolated joint. Combined with the 2020 advisories relating to an offside front suspension arm bush and a nearside front inner drag link ball joint, the record points to a chassis that has been progressively loosening at the front axle over several years. The 2020 failure, while largely electrical, also included a major advisory for a perished offside front anti-roll bar ball joint dust cover, and a 2023 advisory noted a similarly deteriorated offside front suspension component ball joint dust cover. Taken together, the steering and suspension geometry of this C4 should be treated as a priority inspection area rather than a matter of routine maintenance. Against a 20-year vehicle age, the recorded mileage of 145,631 miles equates to roughly 7,282 miles annually, which is broadly in line with typical UK usage for a car of this vintage. There are no significant gaps in the annual testing cycle, with a test recorded in every year from 2019 through 2025, indicating the vehicle has remained in continuous road use rather than being laid up for extended periods. This consistent exposure to mileage is consistent with the pattern of consumable wear observed, particularly the brake, tyre, and suspension advisories that have appeared at regular intervals. There is no evidence of a sudden mileage spike or an unusually low accumulation that might suggest clocking or extended storage, and the oil leak advisories that have appeared at every test since 2022 are consistent with a high-mileage engine and gearbox seals gradually hardening with age. A prospective buyer should plan a focused inspection of the front suspension and steering assembly before committing to purchase. On a test drive, listen for clonking or knocking noises from the front end over speed humps and uneven surfaces, which would suggest the worn track rod end ball joints or suspension arm bushes have reached the limit of their travel. Feel for any vagueness or delay in the steering response, particularly around the straight-ahead position, and check for uneven tyre wear across both front tyres, as the recurring advisories for nearside and offside front tyres worn on the inner or outer edge indicate the geometry may already be misaligned. With the engine idling, inspect the underside for the source of the persistent oil leak, paying particular attention to the sump, cam cover, and gearbox output seals, and budget for replacement of the perished CV boot noted on the 2025 test, since a torn boot will rapidly lead to joint failure if left untreated. The braking system also warrants close attention, given that parking brake efficiency has been recorded as only just meeting the minimum at both the 2024 and 2025 tests. This suggests the rear brake mechanism, whether cable-operated or integral with the caliper, is close to requiring adjustment or replacement, and the 2023 advisory for thin rear brake pads indicates the working friction material on the rear axle is approaching the end of its service life. During a road test, the handbrake should hold the car on a moderate incline without excessive lever travel, and the footbrake should produce a firm, even pedal without sponginess or judder. Finally, with the vehicle now 20 years old, a thorough underside inspection for corrosion to the subframe, brake pipes, and suspension mounting points is strongly advisable, as the MOT visual inspection only confirms what is visible from the test position and corrosion-related defects frequently develop between annual tests on cars of this age and mileage.