2015 Isuzu D-MAX 2.5L Diesel · SM15 CNJ

The December 2025 MOT at 102,634 miles returned a pass, though the vehicle now carries four advisories that signal emerging mechanical concerns. Corrosion features prominently: both front coil springs show corrosion, and both brake pipes front to rear are corroded and concealed by grease or other material. A deteriorated front registration plate rounds out the list. This represents a clear deterioration from the clean pass twelve months prior. The pattern is worsening, not resolving. Mileage accumulation has been remarkably consistent and high for a vehicle of this type. Between December 2022 and December 2023, the odometer climbed from 53,775 to 70,050 miles, an increase of 16,275 miles. The following year added another 14,614 miles to reach 85,664 by December 2024. The most recent interval saw 16,970 miles added in twelve months. Annual mileage has thus hovered between 14,600 and 17,000 miles, well above the national average and suggesting sustained commercial or heavy private use. No prolonged periods of inactivity appear in the record. The December 2023 failure on parking brake efficiency, swiftly rectified for a pass the next day at identical mileage, indicates reactive rather than proactive maintenance. The brake pipe advisories demand particular scrutiny. Corrosion concealed by grease on both sides front to rear suggests either deliberate masking or accumulation of road grime in a poorly maintained undercarriage; a buyer must verify whether this masking material has hidden more advanced wall thinning or whether the pipes require immediate replacement. The corroded front coil springs, while not yet failed, sit in a critical load-bearing position and will deteriorate further given the vehicle's mileage and apparent exposure conditions. The parking brake failure at 70,050 miles, though resolved, raises questions about rear brake mechanism condition and adjustment integrity that a single-day retest may not fully address. Prospective purchasers should commission a pre-purchase inspection focusing on underbody structural corrosion, brake pipe wall thickness throughout their length, and coil spring fracture risk. The parking brake mechanism and rear brake efficiency warrant dynamometer verification. Tyre condition, given the high annual mileage, should also be assessed. This D-MAX remains roadworthy but exhibits the early signs of hard-use wear that will escalate without intervention.