A motor vehicle includes a first and a second set of two separate hydraulic braking circuits. Each of the two braking circuits of each of the first and second set includes a valve assembly for modulating a braking pressure in the two separate hydraulic braking circuits. A valve unit is arranged downstream of a brake booster and is switchable in response to a malfunction of one or both of the two braking circuits of the first set from a first position in which it connects the valve assembly of the two separate hydraulic braking circuits of the first set to the brake booster, into a second position in which it connects the valve assembly of the two separate hydraulic braking circuits of the second set to the brake booster.