Radiator
Radiator
Section titled “Radiator”The E46 radiator has an aluminum core with plastic end tanks. The plastic tanks can crack with age and heat cycling.
Part Numbers
Section titled “Part Numbers”- Manual transmission: 17 11 7 573 781
- Automatic transmission: 17 11 7 573 784 (includes ATF cooler lines)
Symptoms of Failure
Section titled “Symptoms of Failure”- Coolant leak from end tanks (top or bottom)
- Brown or discolored coolant (internal corrosion)
- Overheating due to restricted flow
- Cracks visible on plastic tanks
Recommended Brands
Section titled “Recommended Brands”- Behr (OEM supplier)
- Nissens (quality aftermarket)
- Mishimoto (aluminum upgrade for performance)