2018 Dacia Duster 1.6L Petrol · AF68 XFE

The most recent MOT, dated 8 December 2025, resulted in a failure due to an exhaust lambda sensor reading that fell outside the permitted limits during the second fast‑idle test. In addition to this major defect, the test recorded advisory items for a cut on the off‑side rear tyre and mild scoring on both front brake discs. Over the preceding three years the vehicle consistently passed with only advisory notes, mainly concerning tyre cuts, brake disc surface condition and the fitting of sill covers. The emergence of a substantive emissions failure therefore marks a clear deterioration in the vehicle’s maintenance trajectory after a period of relative stability. At eight years old the Dacia Duster has logged just 29,700 miles, equating to roughly 3,700 miles per annum – well below the typical UK average of 7‑10 000 miles per year for a family SUV. Such low utilisation suggests the car has spent considerable time stationary, which can be as detrimental as high mileage in terms of fluid degradation, battery ageing and corrosion of suspension bushings and brake components. The modest annual run‑off also means that wear on consumables such as tyres, brake pads and discs may be uneven, especially if the vehicle has been driven only on short, low‑load trips. The lambda sensor failure points to a likely fault in the oxygen‑sensor circuit or a clogged catalytic converter, which can cause a rich or lean running condition and may trigger a check‑engine warning. A prospective buyer should confirm that the fault has been rectified and obtain a post‑repair MOT receipt. During a test drive listen for a rough idle, hesitation on acceleration, or a noticeable loss of power, and watch the dashboard for any emission‑related warning lights. The front brake discs, described as “worn, pitted or scored but not seriously weakened,” are approaching the end of their service life; measured thickness should be checked against the manufacturer’s minimum specification, and any vibration or pulsation when braking would indicate the need for resurfacing or replacement. The off‑side rear tyre cut, although not yet through the ply, should be inspected for progression; a fresh repair or tyre replacement is advisable before the next service, especially given the low overall mileage which can hide hidden sidewall fatigue. Given the vehicle’s age and low utilisation, the buyer should also perform a thorough visual inspection for age‑related deterioration. Examine all tyre sidewalls for cracking, dry rot or hardening of the rubber, as time rather than distance can render tyres unsafe. Check the under‑tray and sill covers for rust ingress, particularly around mounting points, and look for any corrosion on suspension arms, ball joints and exhaust hangers. Verify the 12 V battery’s state of charge and cranking performance, as prolonged storage often leads to sulfation; a load test at a reputable garage is recommended. Finally, confirm that the engine oil, coolant and brake fluid have been changed within the manufacturer’s calendar intervals – typically every 12 months for a vehicle that sits idle – and inspect for any leaks, especially around the exhaust manifold and brake calipers, before committing to purchase.