If you’ve ever had a factory coolant bleed screw crack, strip, or snap during a coolant service, you already know the struggle. This billet aluminum coolant thermostat housing bleed screw is a simple upgrade that replaces the weak plastic-style design with a stronger, more service-friendly solution—built to handle repeated maintenance without drama.

Featuring a clean anodized finish and a 6mm Allen head, it’s easier to service than a bulky cross-head screw and helps you bleed the cooling system with confidence. Precision CNC machining ensures proper thread engagement and a secure seal where it matters most.

Key Features

• Billet aluminum construction to help prevent cracking and breakage during service
• 6mm Allen head for quick, easy maintenance access
• Precision CNC-machined for accurate fit and thread engagement
• Anodized finish for a clean engine-bay look and corrosion resistance

Specifications

• Condition: New
• Material: Aluminum alloy
• Finish: Anodized
• Tooling: 6mm Allen (hex)
• Placement: Coolant thermostat housing bleed screw
• Replaces Part Numbers: 11537793373, 17111712788, 17110141325

Fitment

• BMW 1 Series: E81 / E82 / E87 / E88, F20 / F21
• BMW 2 Series: F22 / F23, F87
• BMW 3 Series: E46, E90 / E91 / E92 / E93, F30 / F31 / F34, G20
• BMW 4 Series: F32 / F33 / F36, G22 / G23 / G26
• BMW 5 Series: E39, F10 / F11, G30
• BMW 6 Series: E63 / E64
• BMW 7 Series: E38, G12
• BMW X3: E83, F25, G01
• BMW X4: F26, G02
• BMW X5: E53, E70, F15
• BMW Z3 / Z4: Z3 (E36), Z4 (E85 / E86 / G29)
• MINI: Various models (Cooper / Cooper S applications)

Tip: Always confirm your existing part number and thread style before ordering—especially if your vehicle has been swapped to a different thermostat housing.