2015 BMW I8 1.5L Hybrid electric · TH07 NBE

The most recent DVSA MOT test for this 2015 BMW i8 was conducted on 28 June 2025, resulting in a pass with no defects or advisories recorded. This latest clean result is consistent with the preceding four annual tests, all of which were passed without any recorded advisories, failures, or minor defects. The absence of recurring defect patterns across the most recent five-year MOT history suggests a stable and well-maintained mechanical condition at the time of testing, with no immediate wear-related issues flagged by the examiner. While the MOT certificate provides a useful snapshot of roadworthiness, it is worth noting that the i8 is a complex hybrid and turbocharged performance vehicle, and some inherent drivetrain or high-voltage component concerns may not be fully evaluated within the standard MOT scope. The recorded mileage of 74,631 miles across an 11-year vehicle age equates to an annual average of approximately 6,785 miles, which is broadly typical for a low-volume, high-cost performance car that is often used as a second or weekend vehicle. There are no significant mileage gaps or unusual spikes in usage evident from the MOT records, indicating consistent rather than sporadic use. However, even moderate annual mileage on a turbocharged 1.5-litre three-cylinder engine paired with a hybrid drivetrain can result in wear on components such as the turbocharger, timing chain, oil seals, and high-voltage battery modules. For a vehicle of this type and age, attention should also be given to the condition of the plug-in hybrid system, regenerative braking components, and the integrity of the exhaust system, which on a mid-engined layout can be susceptible to heat-related degradation. Given the clean MOT history and absence of advisories, the prospective buyer should focus their inspection on age- and calendar-related degradation rather than mileage-specific wear. The tyres should be examined closely for sidewall cracking or perishing, as the compounds used on low-volume performance cars can deteriorate over time even if tread depth remains adequate; check the production date codes on the sidewalls and budget for replacement if the tyres are older than five to six years, particularly given the i8's staggered fitment and specialised sizes. The 12V auxiliary battery, which supports the hybrid control systems and electronics, is over a decade old and should be tested for capacity and state of health, as a failing auxiliary battery can cause spurious warning lights and drivability issues on hybrid vehicles. The high-voltage traction battery should also be evaluated for state of charge retention and balance, ideally through a diagnostic readout by a specialist familiar with BMW i-series or i8 systems. On a physical inspection and test drive, the buyer should pay particular attention to the suspension, as the i8 uses a sophisticated aluminium chassis with adaptive dampers; listen for any clunks or knocks over uneven surfaces, which may indicate worn suspension bushes, top mounts, or damper failure. The brake system should be examined for disc corrosion or scoring, particularly given the extensive use of regenerative braking which can lead to rear disc surface rusting or even binding calipers from infrequent manual braking application. Verify the service book stamps and ensure that all required oil changes, hybrid system checks, and brake fluid services have been carried out at the correct intervals, as brake fluid is hygroscopic and should be replaced every two to three years regardless of mileage. Finally, inspect the underside and engine bay for any signs of fluid leaks from the turbocharger oil lines, coolant expansion tank, or hybrid component cooling system, and confirm that any previous recalls or manufacturer technical service actions relating to the i8 have been completed and documented.