Mishimoto 1999-2006 BMW 323i/323i/328i/330i w/ Auto Transmission

This Mishimoto performance aluminum radiator is a direct-fit upgrade for 1999-2009 BMW applications covering 323Ci, 323i, 323is, 325Ci, 325i. It replaces the weak points of the stock part with stronger materials and better flow or cooling so heat, boost and abuse stay under control on street and track duty. AutoTalent lists verified US-market fitment in the table below.

Why upgrade

The Mishimoto Performance Aluminum Radiator for BMW E46 non-M vehicles is designed and engineered to reduce coolant temperatures by 19 F (10.5 C), and to protect your car from overheating during aggressive driving or hot lapping sessions. It is the ideal upgrade for your 3-series, and will outlast the weak stock plastic radiators. These kits are engineered around real chassis packaging, so hoses, coolers and adapters line up without fabrication on the listed years. Follow the published torque specs and install guide, reuse sensors where instructed, and confirm clearances if you run other supporting mods. Every unit ships with the Mishimoto Lifetime Warranty for as long as you own it.

Features

• Direct fit for the 1999-2006 BMW E46 323i / 325i / 328i / 330i
• Installs in one hour
• Reduces coolant temperatures by 19F (10.5C) compared to the stock radiator
• Fully brazed aluminum core with TIG-welded end tanks
• Precision designed CNC-machined quick-disconnect fittings mate perfectly with stock hoses and Mishimoto BMW E46 Non-M Silicone Radiator Hoses
• 18-percent increase in coolant surface area
• 41-percent increase in air surface area

What's Included

• Mishimoto Radiator
• Magnetic Drain Plug
• Mounting Hardware
• Mishimoto Lifetime Warranty

Specifications

Fitment Notes

Verified against Mishimoto US applications and dealer listing for 1999-2009 (21 rows). Years extended to 2027 where the US model remains in production.

Vehicle Fitment