The product is a genuine OEM rear left and right side seat belt retractor for a 2012-2019 BMW 3 Series. It is a high-quality part manufactured by BMW in Germany, ensuring a perfect fit and performance for your vehicle. The seat belt retractor comes with the manufacturer part number 619185400F and interchange part number 72117259390, making it a reliable and compatible replacement for your BMW 3 Series. Additionally, it is a single unit with no warranty, and it may have a California Prop 65 Warning due to its materials.