2020 Mazda CX-30 GT Sport Mhev 2.0L Petrol · NK70 OME

The 2020 Mazda CX-30 GT Sport MHEV holds a current MOT valid until 27 May 2027, having passed its most recent test on 27 May 2026 at 34,693 miles. The maintenance trend has shifted from stable to worsening. The two prior tests in June 2024 and June 2025 were completely clean, yet the 2026 pass flagged corrosion on both front and rear brake pipes, specifically noted as being covered in grease or other material. The tester did not fail the vehicle, but the presence of corroded brake lines at such low recorded mileage raises a flag about how the car has been stored or maintained, particularly if it has spent extended periods stationary. The mileage profile is unusually low for a six-year-old vehicle, averaging roughly 5,782 miles per year. The record shows a fairly consistent accumulation pattern: 26,624 miles in November 2023, 29,685 miles in June 2024, 32,141 miles in June 2025, and 34,693 miles in May 2026. That represents approximately 2,500 miles per year in the most recent period, with no suspicious gaps or sudden jumps in the data. The low mileage itself is not inherently problematic, but vehicles covering such short annual distances are more susceptible to moisture ingress, brake seizing, and fluid degradation from lack of regular heat cycles. The recurring theme across the record is brake system wear and deterioration. In November 2023 at 26,624 miles, the tester flagged worn front brake pads, worn and pitted front and rear discs, and a nearside front tyre worn to near the legal limit. By May 2026, the focus shifted entirely to corroded brake pipework. A prospective buyer should have the underside inspected with particular attention to the condition of all brake lines, flexible hoses, and caliper slides. The corrosion noted on the pipes, especially the reference to grease or contamination, suggests previous underseal or coating work may be masking deterioration rather than preventing it. Beyond the braking system, the low annual mileage warrants a check of the exhaust system for internal condensation corrosion, the condition of all rubber bushings and seals that may have dried out from infrequent use, and the health of the MHEV battery and regenerative braking system, which can behave differently in vehicles that rarely reach operating temperature on longer runs. The tyre wear pattern noted in 2023 also suggests the front suspension geometry should be verified, as uneven edge wear at relatively low mileage points to possible alignment drift rather than simple wear.