2007 BMW 5 Series 3.0L Diesel · KH56 HCZ

Corrosion of the rear anti‑roll bar is the sole recurring mechanical note in the MOT record, remaining an advisory rather than a failure, and the most recent test on 17 November 2021 confirmed a pass despite that observation. Apart from that, the vehicle has produced a clean string of passes since 2015, with only a single isolated failure in 2016 for a non‑functional rear position lamp and insufficient washer‑fluid supply—issues that were rectified for the subsequent test. The 2021 advisory about side skirts and under‑trays limiting full under‑body inspection also suggests that some chassis areas have not been directly examined during MOTs, though no defects were recorded. At 109 872 mi the car averages roughly 5 800 mi per year, a mileage level that is low for a 2007 model. Such a modest annual accumulation often points to periods of limited use or storage, which can be benign but may also allow rubber components, bushings and seals to dry‑crack over time. The relatively low wear on drivetrain and brake components is a positive sign, yet the mileage does not preclude the gradual degradation of suspension bushings, mounts and any hidden corrosion that can develop when a vehicle sits idle for extended stretches. Prospective buyers should give particular attention to the rear anti‑roll bar and the surrounding rear suspension. On a test drive listen for any clunking or knocking over bumps, feel for excessive rear body roll or looseness in the rear end, and inspect the bar for surface rust that could have progressed beyond the advisory level. Because the side skirts and under‑trays have been noted as obstructing full inspection, request that they be removed to allow a visual check of the chassis rails, sub‑frame and exhaust hangers for any concealed rust or damage. Verify that the rear position lamp operates correctly and that the washer system now delivers adequate fluid, as these were the items that caused the 2016 failure. A comprehensive pre‑purchase examination should include a full suspension inspection (including anti‑roll bar mounts, rear trailing arms and bushings), a check of all exterior lighting, and a functional test of the washer system. Given the limited under‑body access during MOTs, a qualified mechanic should also probe the under‑tray area for corrosion or structural compromise and confirm that the emissions system registers correctly on a proper diagnostic scan, addressing the 2021 DSM read‑out issue. Confirming the integrity of these specific items will provide a realistic picture of the car’s roadworthiness beyond the MOT record.