Brake booster Bay Bus 08/70-12/73 (ch 211 2000 001 - 214 2110 465)A good functioning brake servo makes it much more pleasant for Type 2 Bay window bus owners whilst slowing down. By using a vacuum a part of the necessary brake force is already developed so less pressure has be put on the brake pedal. There is no vacuum when there is a leak or a cracked membrane, resulting that it will be considerably harder to gain brake power. Your faulty brake servo can be replaced now by this new item and you can enjoy again