Thank you, hill.

Brake Energy Regeneration in the BMW X1.

Break and now you’ll no longer just slow yourself down; you’ll be able to keep your car moving. Whenever you apply the brakes, or take your foot off the accelerator and coast, the normally wasted energy is recycled. Brake Energy Regeneration uses this energy to recharge the battery, reducing the demand on your engine, the fuel you consume and CO2 emissions.