Coolant Expansion Tank Bleeder Screw Brass for BMW E36 E39 E46

Upgrade your BMW’s cooling system with the Brass Coolant Expansion Tank Bleeder Screw, a universal, durable replacement designed for E36, E39, E46 and a wide range of BMW models. Made from solid billet brass, this bleeder screw is built to outlast the stock plastic version that often strips or corrodes, especially after repetitive maintenance or coolant service. This reliable brass screw provides a dedicated, leak‑free bleed point for the expansion tank, helping you maintain proper coolant flow and preventing air pockets that can lead to overheating.

This is a lifetime durability upgrade for BMW owners who want a permanent solution rather than replacing plastic bleeders again and again. It’s a straightforward swap that doesn’t require complex tools or modifications, giving you peace of mind during cooling system servicing. All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Vehicle Fitment covers a broad list of BMW models, including various 3 Series (E36, E39, E46) and other compatible configurations across multiple years. The part is designed as a universal solution to replace the bleeder screw on the coolant expansion tank on the models listed in the compatibility notes.

Benefits & Tips

• Durable brass construction reduces the risk of stripping, cross‑threading, or leakage compared to plastic bleeders.
• Reliable bleeder access helps ensure complete coolant bleeding during service, reducing air pockets and preventing overheating.
• Simple installation as a direct replacement part for compatible BMW expansion tanks—no welding or adapters required.

Product Specifications

• Brand Name: NONE
• Model Name: universal
• Item Type: Cooling System
• Material: Brass (solid billet brass)
• Color: Golden
• Year: universal
• Displacement: universal
• No. of Cylinders: 4 Cylinder
• Origin: Mainland China
• Special Features: fitting hose
• Application: for BMW E36 E39 E46 etc.
• Vehicle Fitment: 1984 1985 1991 - 1998 318i; 1991 - 1997 318is; 1995 - 1999 318ti; 2000 323Ci; 1998 - 2000 323i; 1998 1999 323is; 2001 - 2005 325Ci; 1992 - 2005 325i; 1992 - 1995 325is; 2001 - 2005 325xi; 2000 328Ci; 1996 - 2000 328i; 1996 - 1999 328is; 2001 - 2005 330Ci, 330i, 330xi; 1989 - 1995 2001 - 2003 525i; 1993 525iT; 1997 - 2000 528i; 1994 1995 2001 - 2003 530i; 1988 - 1993 535i; 1994 1995 1997 - 2003 540i; 1995 1997 - 2001 740i; 1995 - 2001 750iL, 740iL; 1994 - 1997 840Ci; 1993 - 1997 850Ci; 1994 1995 850CSi; 1991 1992 850i; 1994 - 2006 M3; 1991 - 2003 M5; 2004 2005 X3; 2000 - 2005 X5; 1996 - 2002 Z3; 2003 - 2005 Z4.

Package includes:

• 1 PCS Coolant Expansion Tank Bleeder Screw

Warnings/Reminders

• Please verify compatibility with your BMW model and year using the fitment details above to ensure a proper match.
• When servicing the cooling system, ensure the engine is completely cool before replacing or removing bleeder screws to avoid burns from hot coolant or steam.

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