2015 Citroen C4 2.0L Diesel · KW15 AKV

The latest MOT test on the 2015 Citroën C4, conducted on 2026-04-28, resulted in a passing grade despite several critical advisories and one minor failure. While the vehicle has met the roadworthiness standards for the most part, the recurring issues—particularly the front drive shaft CV joint boot failure in 2024-04-03 and the persistent brake imbalance advisories—suggest a pattern of deferred maintenance or underlying wear that may have been overlooked. The 2025-05-06 test revealed a major failure for the CV joint boot, indicating that the previous minor issue was not addressed promptly, which is a red flag for long-term drivetrain reliability. The advisories on brake pad wear and rear tyre edge wear also point to ongoing friction and mechanical stress that should be monitored closely, as these could escalate into more severe failures if not serviced in time. The vehicle’s recorded mileage of 79,823 miles over approximately 11 years represents a moderate annual usage rate of around 7,257 miles per annum, which is within the expected range for a car of this age and class. However, the absence of significantly higher mileage figures over the years suggests that the car may have been used sparingly, potentially with periods of prolonged idleness or storage. This could contribute to certain wear patterns—such as standing corrosion on brake components, fluid degradation from infrequent use, or tyre perishing from exposure to environmental conditions. The CV joint failure in particular may have been exacerbated by neglect during these inactive periods, as CV boots are prone to drying out and cracking when not driven regularly. For a prospective buyer, the most critical immediate actions should focus on the drivetrain and braking systems. The CV joint boot failure is a major defect that requires urgent replacement, as the constant velocity joint is critical for smooth power transmission and can lead to catastrophic drivetrain damage if left unrepaired. On a test drive, listen for unusual clunking or grinding noises from the front axle area, especially when accelerating or turning sharply, as these symptoms indicate joint seal failure or internal component wear. Additionally, check for excessive vibration or uneven acceleration, which may signal misalignment or further joint degradation. The brake imbalance advisories from 2025-05-06 warrant a thorough inspection of the rear brake system, including disc warping, pad thickness, and caliper binding. Inspect for uneven brake pad wear, spongy or pulsating brake pedal feel, or a metallic scraping noise during braking, which could indicate warped discs or seized calipers. Beyond the immediate defects, conduct a comprehensive physical inspection of the Citroën C4. Given its age and the potential for prolonged inactivity, examine the tyres for signs of sidewall cracking or perishing, which can compromise structural integrity and safety. Check the tyre tread depth uniformly and inspect for any bulges or irregular wear patterns, as these may indicate underlying suspension or alignment issues. The rear child seat advisories from previous MOTs suggest the seat may have been fitted in a way that obstructs the driver’s view or access to the adult seatbelt, but this is not a mechanical concern—it simply needs to be adjusted to comply with legal requirements. For fluids, consider the calendar-based servicing of the engine oil, coolant, and brake fluid, as these can degrade over time even with moderate usage. Test the 12V battery for voltage output and charge capacity, as standing vehicles are prone to battery drain from parasitic loads or poor terminal connections. Finally, verify that the service book has been updated, particularly for the CV joint replacement and any previous brake work, to ensure a record of maintenance history. If the vehicle has been stored for extended periods, a thorough inspection of the exhaust system for corrosion or leaks, and the suspension for rust or excessive play in bushes, is also advisable.