2017 Smart (mcc) Forfour 0.9L Petrol · WN67 HTJ

A recurring pattern of brake wear and tyre wear defines the mechanical profile of this 2017 Smart Forfour, highlighted by a dangerous front‑pad failure recorded in the October 2025 test and repeated advisories for thin front‑disc surfaces and tyres edging the legal limit in successive years. While the vehicle cleared the same 2025 test overall, the presence of a dangerous defect alongside multiple advisory items signals that the braking system has been approaching the end of its serviceable life, and tyre wear has been consistently close to replacement thresholds. With just 47,185 mi logged over roughly nine years, the average annual accumulation sits near 5,200 mi, well below the typical UK average for a vehicle of this age. The low mileage suggests light use, but the steady yearly MOT cadence indicates the car has not spent prolonged periods off the road. Light usage can reduce overall component fatigue, yet the wear on brake pads, discs and tyres has progressed despite the modest mileage, implying that the wear is more a function of driving style or operating conditions rather than sheer distance. Prospective buyers should prioritise a thorough inspection of the front braking assembly. Both front pads are likely near or below the minimum thickness, and the discs have already been flagged as worn and pitted; measure the remaining disc depth and look for scoring or uneven wear that could cause judder. During a test drive, feel for any pedal sponginess, pulsation, or pull to one side, and listen for squeal or grinding that would confirm pad or disc degradation. Given the 2023 advisory about service‑brake fluctuation, a brake‑fluid change and a check for any leaking or air ingress in the hydraulic lines would be prudent. Tyre condition also warrants immediate attention. Front tyres have repeatedly been noted as close to the legal tread limit, and a rear tyre failed outright in 2022 due to insufficient depth and a nail puncture. Verify the actual tread depth with a gauge, inspect sidewalls for cuts, bulges or embedded objects, and confirm that the tyre pressures are correct. Any indication of uneven wear could point to alignment or suspension issues, so a wheel‑alignment check and a brief feel for steering pull or vibration over road imperfections should be part of the pre‑purchase assessment. Budget for replacement of the front brake pads (and likely discs) and a full set of tyres to restore the vehicle to a safe, road‑worthy state.