2021 Hyundai Kona Electricity · PJ71 LWN

The 2021 Hyundai Kona presents a generally sound mechanical profile, though its maintenance trend shows a recent decline. The most recent MOT test on 2025-12-10 at 40,117 miles passed, but the tester flagged corrosion and wear on both rear brake discs. This contrasts with the clean bill of health recorded on 2024-12-05 at 27,544 miles. The emergence of this defect over the last twelve months indicates a worsening trend regarding the rear braking system, specifically concerning corrosion and pitting, which typically arises from standing or light use rather than heavy wear. Covering 12,573 miles between the December 2024 and December 2025 tests, the vehicle averages roughly 8,000 miles annually. This is typical for a five-year-old vehicle and suggests consistent, regular use rather than prolonged dormancy. The steady accumulation implies routine driving, yet the sudden onset of rear disc corrosion suggests the car may have been left stationary for extended periods recently, allowing moisture to settle on the unprotected braking surfaces. A prospective buyer should conduct a thorough inspection of the rear braking components. The tester noted pitting and scoring on both rear discs, alongside structural corrosion. Excessive corrosion on the disc edges and ventilation vanes can compromise the structural integrity of the braking assembly, while deep scoring accelerates pad wear. Check the rear calipers for sticking, as binding often accompanies corroded slide pins. Inspect the suspension bushes and coil springs for wear, given the mileage, and examine the undercarriage for any signs of structural rust. Tyre condition and wiper blades are consumables that require routine monitoring, but the primary focus must remain on the corroded rear brake discs to determine if machining or replacement is imminent.