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CSF E46 M3 All Aluminum Triple Pass Radiator, BMW 3 Series

Short description:


  • BMW E46 M3

#7058 - Professional race-spec cooling. “Drop-in fit” requiring no modifications to install. Accepts all attaching OEM components including “quick-connect” hoses, AC condenser, mounting brackets, and fan shroud


CSF E46 M3 All Aluminum Triple Pass Radiator, BMW 3 Series

#7058 - Professional race-spec cooling.

  • BMW E46 M3

A leader in European engine cooling. CSF Ultimate Performance Cooling strives to build and engineer the most advanced, efficient, and reliable cooling systems in the world.  CSF quality and performance provides proper cooling with an easy direct-fit install. This E46 M3 radiator is a factory replacement using all factory shrouding, clip-on hoses, and mounting points.

“Drop-in fit” requiring no modifications to install. Accepts all attaching OEM components including “quick-connect” hoses, AC condenser, mounting brackets, and fan shroud

Triple-pass flow structure allows the coolant to flow across the core of the radiator 3 times before exiting the radiator for lowest outlet temperatures possible

2 row 42mm core (dual core) featuring CSF’s exclusive B-tube technology*

Core features an ultra-efficient fin with 6.5mm fin height and multi-louvered design for maximum surface area contact

CNC machined “quick-connect” inlet/outlet connections

CNC machined brackets and fittings for superb fit and durability

All-aluminum race style drain plug

1 hour “mirror finish” hand polish

CSF #7058

CSF All Aluminum Triple Pass Radiator for BMW E46 M3CSF All Aluminum Triple Pass Radiator for E46 M3 BMW



Replaces the OEM unit single-pass design and plastic shroud with a unique top/bottom dual-pass design for maximum surface area and flow.

Drop-in fit requires no modifications to install. Accepts factory oil-line connectionsCSF E46 M3 Oil Cooler, #8032

Fully TIG-welded extruded-end tank design vs. OEM mechanically jointed and tack-welded design for superior reliability & durability

Fits precisely within the contour of the OEM bumper. No issues with aftermarket splitter attachment either

Turbulated heavy/duty bar/plate design for the most reliable & durable oil cooler available for the platform

8 rows of maximum cooling with a high density multi-louvered fin pitch design

Designed to work with OEM radiator brackets or CSF’s all-aluminum triple-pass radiator (CSF #7058)

Motorsport silver finish


Save more with free shipping or the Harrison Motorsport's BMW CCA User Goup discount.

CSF "B-tubes"

CSF's "B-tube" radiator tubes are specially engineered in the shape of a flat B, 

resulting in a tube that is stronger than the normal "O" shaped tube.  CSF is able to use thinner and lighter aluminum with better cooling efficiency because of the shape of the radiator tubes.and a precision multi-louvered fin to increase heat rejection performance and surface area contact. 

 Additionally, this CSF part has 20% more total cooling tubes, and due to the efficient B-Tube shape, airflow through the core is improved as well.  These technical features all contribute to improved cooling efficiency over OE-type performance upgrades, as well as other standard "performance" aluminum tanked radiators which are nothing more than aluminum tanks on a traditional stock core.

Made in Indonesia in the same factory that produces CSF parts for aftermarket and car line production for several European cars. This part is a much higher level of quality than the typical Chinese factory parts. CSF's Racing & High Performance Division is able to produce a premium high performance cooling system with a level of quality and craftsmanship that is usually found in products with a much higher price point due to their economies of scale of over 600,000 units sold globally every year.

Every CSF quality radiator goes through a testing process in our state-of-the-art testing lab. Our procedures and requirements set the bar for cooling system reliability and performance:


  • Individually leak tested
  • Vibration cycle tested
  • Thermal cycle tested
  • Wind tunnel tested for optimal radiator core cooling efficiency
  • Burst pressure and impulse cycle tested 10,000 times for strength
  • Salt spray tested for corrosion protection
  • 10 foot box “drop test” to ensure packaging protection (link to packaging page)
  • 30 point fitment inspection on critical dimensions to ensure OE fitment with no modifications necessary


CSF ensures that every radiator is individually wrapped and packaged with extra protection for safe delivery to you.

  • Application specific foam packaging
  • Core protected by application specific hard plastic sheet
  • Plastic wrapped
  • Industry leading shock resistant 5-ply box
  • 10 foot box "drop test" to ensure packing proctection


CSF Performance Radiators for BMW





Sample pictures of various CSF Radiators

CSF Aluminum RadiatorsCSF Aluminum RadiatorsCSF Aluminum RadiatorsCSF Aluminum RadiatorsCSF Aluminum RadiatorsCSF Aluminum Radiators

Chassis Code :
  • E46 3 Series 1999-2005
  • E46 M3 2001-2006
  • 3 & 4 Series
Suggested Use:
  • Performance enhancing
  • Street or Mild Track Performance Upgrade
  • Race Level Performance Upgrade
  • Engine - all other
CSF Ultimate Performance Cooling