2016 Citroen C4 1.6L Diesel · LB65 PCV

The most recent MOT recorded on 19 January 2026 resulted in a failure, the major defect being a split constant‑velocity boot on the off‑side front outer drive‑shaft joint which no longer prevents ingress of dirt. The test also retained several advisory items that have persisted for several years – a defective rear exhaust mounting, corrosion of the front anti‑roll bar, and corrosion of both rear coil springs. Over the last five test cycles the vehicle has repeatedly failed on CV‑boot integrity and on the central exhaust hanger, while advisory items have accumulated rather than being resolved, indicating a maintenance trend that is worsening rather than stabilising. With a recorded 67 226 miles on the odometer for a ten‑year‑old 2016 Citroën C4 the average annual mileage works out at roughly 6 700 miles, which is within the normal UK usage band. The relatively modest per‑year distance suggests the car may have spent periods of inactivity, a factor that can accelerate age‑related degradation such as corrosion of suspension components, tyre perishing and battery sulphation. There is no evidence of any sudden mileage spikes that would point to high‑stress wear on the drivetrain, but the low‑average usage also means that many parts may be approaching the end of their calendar‑life rather than their mileage‑life. A prospective buyer should give particular attention to the front CV joints. Look for grease splatter around the boots, listen for a clicking or whine when turning the steering wheel at low speed, and feel for any vibration under acceleration that may indicate joint wear. The rear exhaust mounting should be inspected for cracked or broken brackets and for any rattling or exhaust fumes entering the cabin, especially at low engine speeds. The front anti‑roll bar should be checked for excessive play, rusted bushings or cracked welds that could produce a clunk when cornering. Corroded rear coil springs should be examined for surface rust, loss of spring integrity or cracks; any sign of compromised springs could affect ride quality and load‑bearing capacity. Tyre condition is also a concern – the MOT advisories note slight damage and perishing on both rear tyres and previous warnings about front tyre edge wear – so verify tread depth, side‑wall integrity and look for dry‑rot, especially given the vehicle’s likely periods of standing. Beyond the recurring defects, a thorough pre‑purchase inspection should include a check of the registration‑plate lamp on the nearside rear, ensuring it illuminates correctly, and a visual inspection of the central exhaust hanger for any fracture or missing bolts. Examine the brake discs for surface rust, scoring or uneven wear, and confirm that the calipers move freely without binding. Verify the condition of the 12 V battery – a load test is advisable given the car’s age and possible idle periods – and confirm that coolant, engine oil and transmission fluid have been changed within the manufacturer’s recommended intervals, as fluid degradation can occur with time even if mileage is modest. Addressing the CV‑boot replacement, rear exhaust mounting repair and tyre replacement will be essential to bring the vehicle back to a reliable and road‑worthy state.