2019 BMW I3 Electric · MF69 FOU

The most recent MOT on 9 October 2025 was a pass, but it carried an advisory concerning the rear brake disc being worn, pitted or scored with the inner surfaces completely rusted. The preceding test on 8 October 2025 failed on several major items – ineffective windscreen wipers, fluctuating rear service brake pressure, overall service‑brake efficiency below the required level and insufficient parking‑brake performance. Since the earlier passes in 2022, 2023 and 2024 recorded no defects, the vehicle’s maintenance record shows a generally stable trend that has recently deteriorated in the braking system, requiring prompt attention to prevent recurrence of a failure. With 59,298 miles logged on a 2019 model, the car averages roughly 8,500 miles per year, which sits comfortably within the typical UK usage pattern for a seven‑year‑old vehicle. There are no obvious mileage spikes or long periods of inactivity evident from the MOT data, suggesting the car has been driven regularly rather than being left idle for extended periods. This moderate annual mileage implies that wear on consumables such as tyres, brake pads and suspension components should be proportionate to age rather than excessive mileage‑induced fatigue. The rear brake disc condition highlighted in both the failure and advisory is the most pressing concern. Completely rusted inner surfaces can lead to uneven pad contact, reduced heat dissipation and a higher likelihood of disc cracking under load. On a test drive the driver should listen for a low‑frequency growl or feel a pulsation when applying the rear brake, and inspect for any visible scoring or uneven wear on the disc face. Given the fluctuating rear service‑brake pressure recorded, it is advisable to have the hydraulic system flushed and the rear brake fluid replaced, and to check the condition of the rear caliper pistons and parking‑brake mechanism for sticking or corrosion. The wiper failure noted a year earlier should be verified by a simple sweep across the windscreen; any streaking or missed zones may indicate a worn blade or a weak motor that could re‑appear under heavy rain. Beyond the brake system, the car’s age warrants a thorough inspection of time‑related items. Examine the tyre sidewalls for cracking, dry‑rot or age‑related hardening, especially if the tyres have not been rotated recently. The 12‑volt battery, now approaching seven years, should be load‑tested and its terminals inspected for corrosion. Check the coolant, brake and power‑steering fluids for colour change or particulate contamination, as these are typically serviced on a calendar basis rather than mileage alone. Finally, verify that the service book shows regular oil changes, filter replacements and any scheduled software updates for the electric drivetrain, as these will support the vehicle’s long‑term reliability and resale value.