This high-quality Clutch Master Cylinder by Dorman is a perfect fit for your BMW 318ti, 318i, 325i, M3. Made of durable aluminum material, this manual transmission type cylinder is designed to provide excellent performance and reliability. The 19mm bore diameter ensures a perfect fit and the OE/OEM part numbers 21521162303, 21511162149, 21521162148, 21521159031 provide the necessary compatibility. This item is a genuine NOS (not on shelf) and is suitable for use in front placement on your vehicle. The cylinder has been manufactured in Italy and is compatible with various part numbers including 072-8914, CM126781, 13121, F126781, CM250560. Please refer to the provided aspects for a complete list of compatible part numbers. Exact item is shown. New open box with partial original packaging. Item has light wear from storage and handling. Includes the instructions shown. Item weight 1.2 lbs. Made in Italy. No returns if installed. This item is a new, opened customer return. It has been inspected and passed quality control to insure the condition described and contents are accurate. Please review actual photos as stock photos are not the actual item, our photos are. You will ONLY receive exactly what is shown in photos, regardless of what might have originally been included. Please review our business policies in our store for information regarding returns, shipping and warranties.