BMW 525i Catalytic Converters

Your One-Stop Shop For Trusted BMW 525i Catalytic Converters

If you’re in search of BMW 525i Catalytic Converters aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 11 Catalytic Converters from top brands with prices ranging from $194.99 to $1,442.00.

Beyond great prices, we stock trusted brands manufacturing all types of Catalytic Converters for your BMW 525i.

And don’t forget to read customer reviews across all Catalytic Converters categories in our catalog. Buy with confidence by leveraging past customer experiences of our aftermarket and OEM parts.

At Advance Auto Parts, we don’t think top quality Catalytic Converters have to cost top dollar, and we prove it. Browse our top BMW 525i Catalytic Converters below, order online to ship to your home, or head into your nearest Advance Auto Parts location to get started.

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Essential BMW 525i Catalytic Converters

MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.51374)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$1095.00
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51374. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 51374 includes (1) Torca Clamp, (1) Flange Gasket and interchanges with OE parts 18 30 7 541 847, 18 30 7 541 849, 18 30 7 541 850. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.

Product Features:
  • Durable 308 stainless steel MIG welds
  • Simplifies installation with essential gaskets and hardware being included in the box
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
  • High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
  • OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
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Walker – CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2" Outlet (ID) (Part No.81133)

CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2" Outlet (ID)

from

$506.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.

Product Features:
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MagnaFlow – California Grade Carb Compliant Universal Catalytic Converter (Part No.3322008)

California Grade Carb Compliant Universal Catalytic Converter

from

$723.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 3322008. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.

Product Features:
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MagnaFlow – Hm Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.99204HM)

Hm Grade Federal / Epa Compliant Universal Catalytic Converter

from

$194.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99204HM. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems.

Product Features:
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.51375)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$1093.00
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51375. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 51375 includes (1) Torca Clamp, (1) Flange Gasket and interchanges with OE parts 18 30 7 541 848, 18 30 7 541 849, 18 30 7 541 850. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.

Product Features:
  • Durable 308 stainless steel MIG welds
  • Simplifies installation with essential gaskets and hardware being included in the box
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
  • High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
  • OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
See More

MagnaFlow – Oem Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.51204)

Oem Grade Federal / Epa Compliant Universal Catalytic Converter

from

$211.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51204. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems.

Product Features:
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Walker – CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2"Outlet (ID) (Part No.81333)

CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2"Outlet (ID)

from

$574.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.

Product Features:
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MagnaFlow – Standard Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.93507)

Standard Grade Federal / Epa Compliant Universal Catalytic Converter

from

$205.99
Keep the check engine light off with MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 93507. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design. With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.

Product Features:
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MagnaFlow – California Grade Carb Compliant Direct-Fit Manifold Catalytic Converter (Part No.452430)

California Grade Carb Compliant Direct-Fit Manifold Catalytic Converter

from

$1442.00
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Manifold Catalytic Converter 452430. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This Direct-Fit Manifold Catalytic Converter is designed to fit the 2001-2003 BMW 525i 2.5L & 2001-2003 BMW 530i 3.0L. MagnaFlow 452430 includes (2) Nuts, (2) Bolts, (2) Flat Washers, (2) Flange Gaskets and interchanges with OE parts 18 40 7 507 347, 18 40 7 508 805, 18 40 7 514 498. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.

Product Features:
  • Durable 308 stainless steel MIG welds
  • Simplifies installation with essential gaskets and hardware being included in the box
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
  • High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
See More

MagnaFlow – California Grade Carb Compliant Direct-Fit Manifold Catalytic Converter (Part No.452298)

California Grade Carb Compliant Direct-Fit Manifold Catalytic Converter

from

$1234.00
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Manifold Catalytic Converter 452298. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This Direct-Fit Manifold Catalytic Converter is designed to fit the 2004-2005 BMW 525i 2.5L & 2004-2005 BMW 530i 3.0L. MagnaFlow 452298 includes (2) Nuts, (2) Bolts, (2) Flat Washers, (2) Flange Gaskets and interchanges with OE parts 18 40 7 523 904. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.

Product Features:
  • Durable 308 stainless steel MIG welds
  • Simplifies installation with essential gaskets and hardware being included in the box
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
  • High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
See More

MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Manifold Catalytic Converter (Part No.49773)

Oem Grade Federal / Epa Compliant Direct-Fit Manifold Catalytic Converter

from

$924.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Manifold Catalytic Converter 49773. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 49773 includes (2) Nuts, (2) Bolts, (4) Flat Washers, (2) Flange Gaskets and interchanges with OE parts 18 40 7 507 348, 18 40 7 508 806, 18 40 7 514 499. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.

Product Features:
  • Durable 308 stainless steel MIG welds
  • Simplifies installation with essential gaskets and hardware being included in the box
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
  • High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
See More

Catalytic Converters Brands You Can Trust For Your BMW 525i

2 trusted brands of Catalytic Converters line our shelves, ready to help keep your BMW 525i running smooth. Below are some of the most popular brands and their top Catalytic Converters offerings:

Most Purchased BMW 525i Catalytic Converters from MagnaFlow

When you buy the most frequently purchased MagnaFlow brand Catalytic Converters, you can be confident it will be the right part for your BMW 525i. Here are the MagnaFlow Catalytic Converters Advanced Auto customers buy the most:
Oem Grade Federal / Epa Compliant Universal Catalytic Converter
from $211.99
This product is not rated
Oem Grade Federal / Epa Compliant Universal Catalytic Converter
Catalytic Converters
CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2" Outlet (ID)
from $506.99
This product is not rated
CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2" Outlet (ID)
Catalytic Converters

FAQs for BMW 525i Catalytic Converters

What are the most purchased Catalytic Converters for the BMW 525i?

Out of 11 Catalytic Converters for the BMW 525i, the most popular in our inventory are:
Oem Grade Federal / Epa Compliant Universal Catalytic Converter
from $211.99
This product is not rated
Oem Grade Federal / Epa Compliant Universal Catalytic Converter
Catalytic Converters
CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2" Outlet (ID)
from $506.99
This product is not rated
CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2" Outlet (ID)
Catalytic Converters
Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter
from $1095.00
This product is not rated
Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter
Catalytic Converters