BMW i8 (I12)
The BMW i8 is a futuristic plug-in hybrid sports car that still looks like a concept vehicle on the road today. Positioned as a technology showcase, it utilizes a lightweight carbon-fibre reinforced plastic (CFRP) tub, a small 3-cylinder turbo engine, and an electric motor to deliver sports car performance with eco-car emissions. In the UK, it has a dedicated enthusiast following, but requires specialist BMW 'i' technicians for any repairs, particularly regarding the high-voltage battery or complex hybrid drivetrain. It suits early-adopters and style-conscious buyers wanting a striking, unique daily-drivable sports car.
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Common Faults & Reliability
These are the most common documented problems for the BMW i8 (I12), sorted by their typical impact and frequency.
Door Strut Failure
medium severityThe lightweight carbon-fibre and aluminium dihedral butterfly doors rely on high-pressure gas damper struts hidden within the front wings. Over time, gas pressure escapes, causing the doors to drop unexpectedly or feel excessively heavy to lift.
REx Fuel Pressure Sensor
medium severityThe petrol fuel tank is pressurized and sealed to prevent petrol vapour emissions during pure EV driving. The electronic fuel tank pressure relief sensor or tank vent solenoid valve can fail, causing the iDrive system to lock the fuel filler flap closed.
Steering Rack Knock
medium severityThe lightweight electromechanical steering rack mounted to the front carbon-aluminium subframe develops internal clearance play between the steering rack bar and thrust piece, producing hollow metallic knocking over minor road imperfections.
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Example BMW i8 (I12) Vehicles
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