2021 Hyundai Santa FE Ultimate HEV Auto 1.6L Hybrid electric · ER51 ARY

The vehicle achieved a clean PASS at its most recent MOT test on 24 April 2026 with no defects or advisories recorded, which is the most reassuring indicator in the history file. However, the overall pattern warrants close scrutiny rather than complacency. Just four days earlier, on 20 April 2026, the vehicle failed on a Dangerous defect concerning the rear brake pads, which were found to be less than 1.5 mm thick. A prior failure on 13 February 2025 cited a Major defect for a constant coolant leak from the exhaust system area when the engine was running, a serious emissions and environmental hazard, though the vehicle subsequently passed on 14 April 2025 with no advisories. The presence of a Dangerous failure immediately before a clean pass suggests the rear brake pads were renewed at short notice to secure the test, and the rapid turnaround between the failure and the pass indicates reactive rather than proactive maintenance. The rear tyre edge wear advisories from July 2024 further suggest that attention to rear axle geometry, brake balance, or suspension geometry may be advisable. The recorded mileage of 64,680 miles over five years equates to approximately 12,936 miles annually, which is notably high for a vehicle of this age and well above the typical UK average. MOT records indicate consistent use with the mileage accumulating steadily rather than long periods of standing, which generally benefits mechanical longevity by avoiding issues such as brake disc corrosion, seized calipers, and perished rubber components. However, higher annual mileage accelerates wear on consumables including brake pads and discs, tyres, suspension bushes, coil springs, and the hybrid drivetrain components. The cumulative effect on a hybrid powertrain, particularly the regenerative braking system, brake actuation, and high-voltage battery thermal management, should be considered alongside the standard combustion-related wear items. Given the Dangerous rear brake pad failure, it is essential to confirm exactly what remedial work was carried out. A prospective purchaser should verify whether the rear brake discs were machined or replaced at the same time as the pads, as worn pads scoring already-thin discs can compromise braking efficiency and lead to premature wear of the new friction material. On a test drive, listen for any rear brake squeal, grinding, or pulsing through the pedal, and check for pulling to one side under braking. Inspect the rear discs through the wheels for lipping, blueing from overheating, or excessive surface corrosion around the outer edge, which may indicate binding calipers or a reluctant parking brake mechanism, both common on hybrid vehicles where the friction brakes are used less frequently due to regenerative braking. Inspect the rear tyres carefully for uneven shoulder wear, which could point to lingering geometry issues or a partially seized rear brake caliper dragging unevenly. Verify the rear tyre age via the DOT sidewall date code, as tyres fitted in 2024 may be approaching the five-year replacement threshold even if tread depth remains adequate. The coolant leak failure from 2025 is a separate but important concern requiring verification. Coolant leaks from the exhaust system area could indicate a failing EGR cooler, a compromised head gasket allowing coolant into the combustion process, or a deteriorated coolant hose routing near heat-exposed components. On a test drive, watch for any white sweet-smelling vapour from the exhaust on a cold start, fluctuations in the coolant temperature gauge, persistent coolant loss requiring frequent top-ups, or any mayonnaise-like residue beneath the oil filler cap. Check the coolant expansion tank level and condition of the coolant itself, which should appear clean and brightly coloured rather than discoloured or oily. As the vehicle is now five years old with high mileage, time-based servicing items should be confirmed regardless of the clean MOT outcome. Verify that the 12V auxiliary battery has been replaced recently, as conventional lead-acid units typically last only four to five years, and a failing battery on a hybrid can cause a cascade of electrical faults. Confirm that the engine oil and filter, transmission fluid, brake fluid, and coolant have been renewed in line with Hyundai's schedule, and ensure the high-voltage hybrid battery has been health-checked with a diagnostic report available. Insist on a full Hyundai main agent or specialist hybrid service history to validate the integrity of the hybrid system before purchase.