Is this catalytic converter legal in California?

This Magnaflow catalytic converter is EPA-compliant but is not CARB approved. It cannot be legally installed on vehicles registered in California or other states that have adopted California emissions standards.

What is included with this catalytic converter?

This direct-fit catalytic converter comes with the essential gaskets and hardware needed for installation. The unit itself is constructed from durable stainless steel with a spun body and mandrel-bent tubing.

How does this converter ensure a good fit?

Magnaflow uses the latest 3D scanning systems in their research and development to replicate the original equipment's fit and function. This direct-fit design eliminates the need for cutting or welding during installation.

MagnaFlow Conv DF 99-00 BMW 540i 4.4L PS Rear

1 / 4

Specifications

Brand: Magnaflow
Part #: 49786
UPC: 841380050748

MagnaFlow Conv DF 99-00 BMW 540i 4.4L PS Rear

Name: MagnaFlow Conv DF 99-00 BMW 540i 4.4L PS Rear
Brand: Magnaflow
Price: 833.00 USD
Availability: InStock

$833.00

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1999-2003 BMW 540i. Magnaflow direct-fit catalytic converter keeps your check engine light off with EPA-compliant emissions control.

Key Features

Fits 1999-2003 BMW 540i, 1999-2001 BMW 740i, and 1999-2001 BMW 740iL.
Meets Federal emissions requirements set forth by the EPA for OBDII Federally registered vehicles.
Constructed with free-flowing mandrel-bent tubing and a spun body design.
Built with high-strength 16-gauge 409 stainless steel tubing for excellent corrosion resistance.
Features durable 308 stainless steel MIG welds and a single laser fusion weld to minimize leaks.
Direct-fit design means no cutting or welding is required for installation.

Secure CheckoutFast Shipping631-982-0042

Fits these vehicles

BMW 540i 1999-2003
BMW 740i 1999-2001
BMW 740iL 1999-2001

Product Details

If you're working on your 1999-2003 BMW 540i and need to replace the catalytic converter, this direct-fit unit from Magnaflow is a solid option. It's designed to keep your check engine light off by meeting Federal emissions requirements set by the EPA, making it compliant for OBDII Federally registered vehicles with California or Federal/EPA Emission systems. This means you can be confident it will pass emissions testing where required.

Magnaflow builds this converter using a free-flowing, mandrel-bent tubing design within a spun body. This construction helps maintain factory performance and fuel efficiency, while the highly corrosion-resistant 16-gauge 409 stainless steel tubing and durable 308 stainless steel MIG welds ensure it holds up over time. The single laser fusion weld replicates the OE design, significantly reducing the chance of leaks. Its compact, low-mass design also contributes to better thermal efficiency. Because it's a direct-fit unit, installation is straightforward, with no cutting or welding needed, and it includes the necessary gaskets and hardware.

This converter is designed to fit your 540i precisely, and Magnaflow uses advanced 3D scanning during development to ensure it functions like the original equipment. It also interchanges with OE part number 18 30 1 437 546.