Each half of the engine uses an air-to-water intercooler. These seem to be getting more popular to reduce the length of piping and improve throttle response.
BMW iPerformance seems to be a new trim level spreading across the lines. This is a big 740e sedan. I don’t know much about the rich and luxurious life, but I am guessing the ‘e’ stands for executive as that’s a really big back door indicating a lot of leg space.
So what is iPerformance? Those bright orange high voltage cables and connectors should be an indicator. They help carry the electrons to the 111hp electric motor.
Check out the big resonator on the intake tube of the 2.0L twin-scroll turbo 4-banger; I’d guess it’s the 248hp variant. You might be thinking the 2.0L engine is awfully small for such a big car. But, don’t forget it is paired to a big 111hp electric motor with maximum torque at 0 rpm. This massive car with a baby engine does 0-60 in 5.5 seconds and the car will do 14 miles on pure electric.
Buried down there is the linear electric actuator for the turbocharger wastegate.
This should be the electronic throttle body. On the left side of it is the air coming from the turbo, on the right should be the air-to-water intercooler. I think those two coolant lines in the lower left of the picture are for the intercooler. Too bad everything is hidden under massive plastic covers.