Radiator Overhaul Upgrade, CSF - E46 323i/325i/328i/330i -4/05 Manual Transmission

Upgraded aluminum radiator with silicone hoses using high performance components

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This radiator upgrade package for the 1999-4/2005 E46 323i/325i/328i/330i manual transmission cars includes a performance aluminum radiator and silicone hoses for bulletproof cooling and reliability. This is the perfect upgrade over a stock radiator with the radiator essentials - why spend more for a larger package when you only need the basics? This kit includes what you need when replacing the radiator -

  • CSF Aluminum radiator, #3305, replaces BMW 17119071518
  • BimmerWorld silicone upper radiator hose with connectors, replaces BMW 17127510952
  • BimmerWorld silicone lower radiator hose with connectors, #11531436408
  • Temp sensor, #13621433077
  • Radiator mounting bracket o-ring, #17111711987
There are other kits out there that include additional cooling system parts. But when you only need to replace the radiator, this is a more appropriate package. With these parts you only need to disconnect the minimum number of parts to swap out the radiator - each hose from the thermostat and the mounting plate from the radiator. The water pump, thermostat, and expansion tank all remain in place. We can also build you a custom package with a discount for any additional parts you need.

CSF Aluminum performance radiators feature a thicker core combined with their B-tube design to offer greatly enhanced cooling performance with improved durability. Instead of a single oval radiator tube, CSF has two tubes in the shape of a "B" that have more surface area and greater strength. In addition, CSF can use a thinner material that is more efficient and lighter. Adding lightness has its benefits as a thicker core will mean the radiator and extra coolant will weigh more (thicker is not always the best). By doing away with the plastic end tanks and connections, CSF has eliminated the main weak points of the stock radiator design. The plastic has a tendency to crack and leak, especially on track cars where the extreme heat makes the plastic brittle.

The E46 CSF Aluminum radiator is designed to fit the same as the original radiator but uses a thicker core that reduces clearance to other components. Even though most often used in full-track builds, it re-uses most of the factory plastic shrouding, hose connections, and mounting points. However, some small modifications, trimming, and adjustments may help improve fitment. Clearance between the expansion tank and power steering pulley is particularly tight but contact is rare, even on Spec E46 and other track cars, and can usually be traced to either incorrect installation or worn engine mounts.

The BimmerWorld silicone hoses are a 3-layer polyester-core design which makes them much more durable than stock. They can hold more pressure and retain their flexibility longer without the aging and cracking issues of rubber hoses. This kit includes the two most common failure hoses - upper and lower radiator, and includes new OEM hose connectors. We don't recommend re-using the original connectors because the spring clip wears out over time and likely won't have adequate tension to seal on the new radiator. To prevent a leak post-install we have included new connectors in this package.

The o-ring in this package is for the mounting plate for the expansion tank. When removing the plate from the radiator this o-ring should be replaced.

BMW coolant is sold separately (or purchase it locally to save on shipping).

This package fits cars with manual transmission only.

BMW Fitments:

3 Series
E46 (99-05) > 320i
E46 (99-00) > 323Ci
E46 (99-00) > 323i
E46 (99-4/05) > 325Ci
E46 (99-4/05) > 325i
E46 (99-4/05) > 325xi
E46 (99-00) > 328Ci
E46 (99-00) > 328i
E46 (99-4/05) > 330Ci
E46 (99-4/05) > 330i
E46 (99-4/05) > 330xi
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