Two-stage gear unit - the upper gear is snail type. Therefore it wears down. Can that gear be changed easily? If not, we can call it planned obsolescence.
The traditional vacuum brake booster will have hard brake feel when there is no vacuum or when engine is off. With this electric brake booster can you still have soft brake feel when engine is off?
The design itself assures there is certain amount of minimum pressure created even if the electric motor fails. The difference is it would be a hard brake.
