FAST REPAIR is a specialization featured in Battlefield 4 and is the first specialization apart of the Mechanic Upgrade Path. It increases the speed of repairs to vehicles (or damage to enemy vehicles) by the Repair Tool by 35%.
— In-Game Description
FAST REPAIR is a Tier 2 Specialization featured in Battlefield Hardline as a part of the Mechanic Reputation track. Functioning similar to the Battlefield 4 counterpart, it increases the speed at which a vehicle can be repair with the Repair Tool.