Koyo 99-05 BMW E46 (Non M3) M/T ONLY Radiator

This is a Koyo aluminum radiator designed for 1999-2005 BMW E46 models, specifically those with a manual transmission and excluding the M3. If your E46 is running hot or you're replacing an old, leaky radiator, this part is built to keep your engine running at the right temperature. It's a direct replacement for your original radiator, meaning it fits right into your existing cooling system setup.

Koyo builds these radiators with a focus on efficient heat transfer. The all-aluminum construction is well-built and helps dissipate heat more effectively than stock plastic-and-aluminum designs. This can make a notable difference, especially if you push your car a bit or live in a warmer climate. The core is designed for good airflow, ensuring that coolant stays cool even under load. It's a solid option for maintaining your BMW's cooling system integrity.

When installing, remember to properly bleed the cooling system to ensure there are no air pockets, which can cause overheating. This radiator is intended for manual transmission vehicles only, so be sure that matches your car's setup before ordering.