CSF High-Performance all-aluminum radiator for the BMW E39 M5 (2000-2003) and 540i manual (1999-2003); it also fits the automatic transmission with a modified drain plug. It uses a dual-core 2-row 42mm core with CSF's exclusive B-Tube technology, which raises tube heat-transfer surface area by about 15% over standard O-shape tubes for stronger cooling on the street or at the track. Ultra-efficient multi-louvered fins with a 6.5mm fin height maximize airflow through the core. The radiator is a drop-in fit and accepts all factory components, including the quick-connect hoses, AC condenser, mounting brackets, and fan shroud.
| Type | High-performance all-aluminum radiator (CSF B-Tube) |
| Core | 2-row 42mm dual core, B-Tube technology |
| Fins | Multi-louvered, 6.5mm fin height |
| Inlet / Outlet | CNC-machined quick-connect connections |
| Finish | Smooth satin |
| Fit | Drop-in (manual); fits automatic with modified drain plug; accepts OEM hoses, AC condenser, brackets, and fan shroud |
| Included | All-aluminum race-style drain plug |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1999-2003 | BMW | 540i | Base |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
