MagnaFlow HM-Grade Federal/EPA-compliant direct-fit catalytic converter (50400) for the 2004-2005 BMW 545i, 645Ci, 745i and 745Li, driver side. Spun-body 409 stainless construction with mandrel-bent tubing and a single laser-fusion weld replicates the OE design for smooth flow and a leak-resistant seal; installs with no cutting or welding, includes gaskets and hardware. Federal/EPA compliant for OBDII vehicles — not legal for sale in California.
| Type | Direct-fit catalytic converter |
| Grade | HM Grade |
| Material | 409 stainless steel (spun body) |
| Hardware | Gaskets and hardware included |
| OEM Replacement | 18407522555, 18407522571 |
| Position | Driver side |
| Emissions | Federal/EPA compliant (not legal for sale in California) |
| Part Number | 50400 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2005 | BMW | 545i | Base |
| 2004-2005 | BMW | 645Ci | Base |
| 2004-2005 | BMW | 745i | Base |
| 2004-2005 | BMW | 745Li | 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.
