Function: Belt Tensioner Assembly is a commonly used holding device in belt and chain transmission systems. Aazon.co: Serpentine Drive Belt Tensioner Kit for Chevrolet Sonic 1 Fitment: Replacement for Chevrolet Sonic 1.8L 2013-2018; Replacement for Chevrolet Cruze 1.8L 2013-2015; Replacement for Chevrolet Cruze Limited 1.8L 2016... A new Belt Tensioner has been replaced to prevent the chain from loosening or falling off, reduce sprocket and chain wear, make the car run more smoothly, reduce noise, and prevent the car from slipping Replacement part numbers: 25191534,55563512,55578115,6PK1550., Please check that the model/year/part number matches our description before purchasing Great Performance: Engineered with quality metal and rubber materials. The serpentine belt maintains power transmission, and the drive belt tensioner ensures consistent belt tension, delivering reliable performance Easy to install: Replace aging/damaged parts directly without modification. Serpentine Belt Kit Belt Tensioner Pulley Kit For Sonic 1.8L 2013-2018, Cruze 1.8L 2013-2015 2519 6PK1550 Belt Tensioner Kit Packaging includes: 1 * belt tensioner, 1 * bolt, 1 * belt,If you have any other questions about the product, we will reply to you within 24 hours, except for holidays.