The engine peripheral components is referred to the outdoor and front parts of motor power of the vehicle dedicated to activation and stimulation of engine systems such as pistons open/close timing system, cooling system (water pump), steering auxiliary system (steering hydraulic pump), air conditioning system (cooler compressor) and dynamo. The three major elements of this set include belt, tensioner and idler. In order to increase the effective lifetime and improve the performance, the NVH issue are certainly considered and studied in designing and manufacturing such type of parts. 

Meanwhile, the fueling system including gas pump and gas filter is categorized in this group for vehicle engine activation.