2018 DS DS3 1.2L Petrol · SK68 WKA

A pattern of recurring brake and underbody advisories defines the mechanical profile of this 2018 DS DS3, with the most recent test on 19 June 2026 producing both a pass and a fail on the same day. The failure was driven by a dangerous leak from the offside rear brake hose, a serious defect on any hydraulic braking system, alongside a nearside headlamp aim that was too high. The same inspection also flagged a defective front exhaust mounting and corrosion to the rear subframe, neither serious enough to fail but both worth noting. Looking back through the record, the 2025 test drew attention to an offside rear service brake binding slightly and loose offside rear sill trim, while the 2021 test had already noted offside rear brake fluctuation and brake disc wear on both rear items. The intervening tests in 2022, 2023, and 2024 were clean apart from a 2024 failure for a split offside front CV joint boot. Taken together, the rear braking area has been a consistent source of advisory attention, and the 2026 dangerous leak represents an escalation of that trend rather than an isolated event. With 57,628 miles recorded over roughly eight years, this DS3 is accumulating about 7,200 miles annually, which sits broadly in line with typical usage for a car of its age. There are no extended gaps between tests that would suggest long periods off the road, and the mileage progression between tests appears consistent rather than erratic. At this annual rate, consumable wear on items such as brake pads, discs, tyres, and suspension bushes is proportionate to mileage, and the components that have drawn advisories broadly align with what one would expect to see surfacing on a vehicle of this age and mileage. The CV boot failure in 2024 and the brake hose issues in 2026 are the standout mechanical events within an otherwise steady usage profile. A prospective buyer should pay particular attention to the rear braking system during any inspection and test drive, given the history of fluctuating binding at the offside rear and the dangerous hose leak recorded at the most recent test. Listen for any dragging or uneven retardation from the rear brakes, feel for a spongy or inconsistent pedal, and check visually for fresh fluid residue around the offside rear hose unions and caliper. With subframe corrosion noted as not seriously weakened, it remains worth inspecting the rear underside on a ramp for any progression, particularly around mounting points, and listening for clonks or knocks over uneven surfaces that might indicate play in suspension linkages. The defective front exhaust mounting should be checked for excessive movement or rattling under engine load, and the split CV boot from 2024 warrants confirmation that the joint itself has not suffered long-term damage, which would typically present as a clicking noise on full lock turns. Finally, given the headlamp aim failure on the same day as the pass, verify that both headlamps are correctly aligned and that the adjustment mechanism is intact before assuming the lighting system is in order.