CSF Triple-Pass Aluminum Radiator - BMW M3 (E46) (2001-2006)

All-aluminum triple-pass performance radiator for the 2001-2006 BMW M3 (E46). The triple-pass flow structure carries coolant across the core three times before exiting for the lowest possible outlet temperatures, over a 2-row 42mm dual core using CSF's exclusive B-Tube technology and 6.5mm-tall multi-louvered fins. It drops in with no modifications and accepts the OEM quick-connect hoses, AC condenser, brackets, and fan shroud. CNC-machined brackets and quick-connect fittings, an all-aluminum race-style drain plug, and a smooth satin finish complete it.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy