Mishimoto Performance Aluminum Radiator for 1999-2009 BMW 323, 325, 328, 330, and Z4 (MMRAD-E46-323)

Fits select 1999-2009 BMW 3-Series (323, 325, 328, 330) and Z4 models.

The Mishimoto Performance Aluminum Radiator is an essential cooling system upgrade for E46 and Z4 enthusiasts looking to replace the failure-prone factory radiator. While stock BMW radiators rely on plastic end tanks that often crack and leak under thermal stress, this unit features 100% brazed aluminum construction and TIG-welded end tanks for long-term durability during aggressive driving or track sessions.

Engineered for maximum efficiency, this radiator utilizes a large two-row core that reduces coolant temperatures by up to 19°F (10.5°C). The design increases coolant capacity by 20% and offers an 18% improvement in coolant surface area. To ensure a straightforward installation, the radiator features CNC-machined inlets and outlets that are compatible with factory quick-disconnect hoses. This radiator comes in two separate versions for manual and automatic transmissions; with the automatic transmission model featuring an auxiliary inlet port for the stock transmission cooler connection.

• 100% brazed aluminum core with TIG-welded end tanks
• Reduces coolant temperatures by up to 19°F (10.5°C)
• 20% increase in coolant capacity over stock
• 41% increase in air surface area for improved heat dissipation
• CNC-machined quick-disconnect ports for OEM hose compatibility
• Includes Mishimoto Lifetime Warranty
• MPN: MMRAD-E46-323