2018 BMW I3 0.6L Hybrid electric · AF18 GKK

Fuel economy for the BMW i3 with the range-extender is genuinely impressive in mixed use, with many owners reporting 200+ mpg equivalent when predominantly running on electric power; petrol-only consumption is typically around 50-65 mpg when the range extender is active. Road tax is £0 annually as the i3 falls within the zero-emission vehicle exemption band for cars registered before the 2025 changes affected newer models, though this is worth confirming with DVLA for this specific registration. Insurance sits in groups 21-23 typically, which is moderate for a premium-badged city car.

Estimated annual running costs of £800-£1,100 should cover electricity for charging, minimal fuel, tyre replacement, and routine servicing. The i3 uses a single-speed transmission with no traditional service items like cambelts, though brake fluid, coolant, and cabin filter changes still apply. Tyres are a known cost area — the narrow eco-tyres are specialist items costing £120-£180 per corner. Specialist BMW i3 knowledge is concentrated in certain workshops, so labour rates outside main dealers may be cheaper but availability is patchier.

The MOT history shows no advisories or failures across all five recorded tests, which is a strong indicator of consistent basic roadworthiness. Given the aggregate model data shows tyres, coil springs, and windscreen washer issues as the most common failure reasons for i3s, physically check all four tyres for even wear (the narrow fronts and rears can wear unevenly due to the car's light weight distribution), inspect the coil springs for any sagging or corrosion at the rear (a known i3 weak point), and verify all washer jets function correctly. Look underneath for any corrosion around the aluminium chassis components, as the i3's carbon-fibre-reinforced plastic body shell means structural rust is unlikely but suspension components still corrode normally.

Critically, you must inspect items MOT does not cover: the high-voltage battery's state of health via diagnostic tool (dealer or specialist), the 12V auxiliary battery condition (these fail regularly and cause cascading electrical faults), and the charging port for damage or wear. Test both AC charging and, if equipped, rapid CCS charging. Listen for any unusual noises from the range-extender petrol engine — a tapping or rough idle suggests the engine hasn't been run often enough. Check the regenerative braking feel is consistent and that the i3's distinctive one-pedal driving mode engages properly. Finally, examine the distinctive rear-hinged rear doors (coach doors) for alignment and check the frameless windows operate smoothly.