About This

• FITMENT FOR BMW 3 SERIES:For BMW 323Ci 2000; 323i E46 1999-2000; 323i Sport Wagon 2000; 325Ci E46 2001-2006; 325i 2001-2005; 325i Sport Wagon 2001-2004; 325xi 2001-2005; 325xi Sport Wagon 2001-2004. Verify the complete model designation, body style, year and original reservoir before ordering.
• ADDITIONAL 3 SERIES AND X MODELS:For BMW 328Ci 2000; 328i E46 1999-2000; 330Ci E46 2001-2006; 330i 2001-2005; 330xi 2001-2005. For BMW X3 2004-2005; X3 3.0i 2006 and 2008; X3 3.0si 2007-2008; X3 xDrive30i 2009-2010. For BMW X5 2001-2005; X5 3.0i 2006. Compare the original tank layout because other engines may use a different reservoir.
• PRESSURIZED 1.2 L CONFIGURATION:The included cap has a listed maximum pressure rating of 200 ±15 kPa. The 1.2 L capacity is measured at the MAX fill level rather than the brim, preserving the intended coolant expansion space. Black PA66+GF30 construction is rated from -30°C to 120°C and supports dimensional stability around the cap neck, hose connections and mounting areas during normal heat cycles and vibration.
• EXTERNAL SENSOR CONFIGURATION:Designed for applications using an external coolant-level sensor arrangement. Confirm the original sensor, connector and mounting interface before ordering; a replacement sensor is not listed in the supplied package contents. Cross-references 603-535, 603535, 17137787039, 17117573781, 17111436413 and 17132247553.
• BUILT AROUND REAL REPLACEMENT NEEDS:Cracks, seam or hose-neck seepage, dried coolant residue, repeated coolant top-offs or a low-coolant warning may indicate deterioration of the reservoir, cap or connections. BDFHYK treats the tank as part of a pressurized cooling system: cap rating, cap-neck sealing, hose seating, sensor installation, correct filling and bleeding all affect operation. Continued coolant loss or elevated engine temperature requires complete cooling-system diagnosis.