2016 DS DS3 1.6L Diesel · PL16 ECA

The mechanical story of this DS3 is dominated by brake and suspension wear that escalated sharply in the run-up to its most recent test. Between 2020 and 2024 the vehicle passed six consecutive MOT inspections with no advisories recorded, suggesting that during that period the consumable components remained within acceptable limits. That pattern broke in 2025, when advisories appeared for a minor front exhaust gas leak and front and rear brake pads noted as wearing thin. By June 2026 the brake-related deterioration had reached a critical stage, prompting a fail with dangerous defects recorded against both nearside front and nearside rear brake pads, which were found to be less than 1.5 mm thick, alongside an advisory noting that the offside rear brake disc was worn, pitted, and scored. The vehicle subsequently passed two days later on 19 June 2026, but the advisory for an offside front suspension arm rear bush cracking and showing wear persisted across both the failed and passed tests. This sequence indicates that the braking system and front suspension components have been left to deteriorate to a point where safety-critical friction material required immediate replacement and the suspension linkage is now showing age-related degradation. Mileage accumulation across the recorded testing period appears broadly consistent with the vehicle's ten-year age, with annual use averaging around 8,400 miles based on the 84,625 total figure. The testing history is uninterrupted from 2020 onwards, with annual inspections carried out in successive summers, indicating the car has remained in regular active use rather than being laid up for extended periods. This continuous usage pattern is generally favourable for preventing the drying-out of seals and the corrosion of underbody components that can affect stored vehicles, but it does mean that the mechanical components have accumulated wear proportionate to genuine road miles. The late-life emergence of brake and suspension defects at this mileage and age is consistent with components such as pads, discs, and rubber suspension bushes reaching the end of their functional service life, and suggests that further similar replacements are likely as mileage continues to accumulate. For a test drive, particular attention should be paid to the braking system given the dangerous pad condition recorded at the most recent test. Even though the vehicle subsequently passed, the abrupt transition from clean tests to dangerous pad wear in a single year suggests that pad condition should be verified directly, ideally by inspecting pad material thickness through the wheel or by asking for documentary evidence of replacement. On the road, listen for any squeal or grinding from the nearside corners, check for pedal pulsation that might indicate the pitted offside rear disc has worn further, and observe whether the vehicle pulls under heavy braking which could point to uneven pad wear or a binding caliper. The exhaust should also be listened to at idle and on the over-run for any ticking or blowing sounds consistent with the minor front exhaust leak advisory from 2025, which may have progressed. The persistent advisory regarding the offside front suspension arm rear bush warrants close physical inspection prior to purchase. With the engine running and the vehicle stationary, watch for any vertical movement at the offside front wheel when the body is rocked, and on the road, listen for clonking or knocking noises transmitted through the suspension over speed humps, potholes, or uneven surfaces. Steering vagueness, tramlining on cambers, or uneven front tyre wear would all indicate that the bush has deteriorated beyond the advisory threshold and requires replacement. Given that the brake hydraulic reservoir was also flagged as close to its minimum level at the failed test, it is worth checking the fluid level and inspecting the area around the master cylinder and callipers for any signs of leakage, as low fluid can mask a developing hydraulic issue or external seepage.