New brake ducts at both the front and rear of the car are designed to improve brake cooling and airflow management. Brake ducts funnel air into and out of the brake assembly; on the AMR25, this consists of Brembo brake calipers and Carbon Industrie carbon-fiber discs and pads.

The brakes can slow the car with a deceleration rate of up to 6G, with braking power more than four times that of the hybrid power unit. This means they can bring the car to a standstill from 199 mph in under five seconds and must withstand intense temperatures up to 1,832°F.

A balance must be struck between aerodynamic cooling and aerodynamic efficiency: bigger brake ducts mean better cooling, but aerodynamic efficiency will suffer. How harsh a circuit is on brakes will inform that decision.