VEHICLE COMPATIBILITY: for Audi A3 2015-2020 for Audi A3 Quattro 2015-2020 for Audi A3 Sportback e-tron 2016-2018 for Audi S3 2015-2020 OE Number:5Q0512521FPRODUCT INFORMATION: Material: Plastic, Metal Color: Black Dimensions: 18x7.5x7cm/ 7.09"x2.95"x2.76"(L*W*H) Pin Number: 4 Pins Place On Vehicle: Rear Left PERFORMANCE:The height level sensor designed to detect the height of the vehicle body and adjust the height of the suspension as needed to ensure the stability of the vehicle when driving at high speeds, over potholes, or on different terrains, make the car work well and improve work performance.NOTICE: This is a non-OE items, accessory ONLY! Please check your Car Model, reference our product before purchase Before. Due to manual measurement, the size deviation is about 1-2 cm. INSTALLATION:DIRECT INSTALL: Direct replace the broken suspension ride height level sensor.