BMW i8 (I12) Common Problems & Reliability
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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Detailed fault breakdown, symptoms, and estimated repair bills by production year.
Most Common BMW i8 (I12) Faults & Repair Costs
Door Strut Failure
The heavy butterfly doors rely on gas struts to stay open. When they fail, the door falls on your head.
REx Fuel Pressure Sensor
The fuel tank for the range extender is pressurized. The pressure sensor can fail, preventing the fuel filler flap from opening.
Steering Rack Knock
Similar to other BMWs of the era, the steering rack can develop internal play and knock over bumps.
Buying a used BMW i8 (I12)? Always check for hidden finance and write-off history.
Mechanical problems are only half the battle. Over 1 in 3 UK used cars checked have unpaid finance or accident write-off records that could cause you to lose the car or thousands in value.