APWPART FINDER
My Vehicle Add New
  • Select Year
  • Select Make
  • Select Model
  • Select Submodel
  • Select Engine

Shop by Brand

BMW 525i Catalytic Converter

We have 11 Items In-stock. Select a year to continue.
$397.20 List Price $468.70 Save $71.50 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)

EVANFISCHER DIRECT FIT CATALYTIC CONVERTER

This direct fit item is manufactured from high quality and durable stainless steel catalytic case, 16-gauge aluminized steel tubes, and heat shield for long lasting durability and for better protection. It also features honeycomb catalyst that has maximum surface area flow.

OBD-II and EPA compliant catalytic converter; It is a high quality aftermarket replacement for the OEM catalytic converter. Designed for easy installation - it requires no cutting or welding! This is manufactured in accordance to industry standards to ensure product durability and reliability; best of all, EvanFischer products are covered by 5-year or 50,000-mile limited warranty.

Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: REPB960301
  • Brand: Evan Fischer
  • Fit Note: Engine Designation: M54, MFR BodyCodeName: E39
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 32 in. overall length
(see more)
Fits the following BMW 525i Years:
  • 2001-2003 | 6 Cyl 2.5L | Base
$80.17 List Price $162.54 Save $82.37 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
EASTERN CATALYTIC CONVERTER

World-class quality and innovation have made Eastern the best converter manufacturer in the business. 100% of Eastern's research and development efforts goes into making the finest aftermarket and original equipment catalytic converters on the market. Each Eastern catalytic converter uses advanced materials design which retains maximum engine output and maximizes catalytic efficiency. Eastern's proprietary NANO technology chemistry yields highly efficient loadings for lower cost and better converter efficiency.

Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: EAST70534
  • Brand: Eastern
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 7.25 x 4.25 x 13 in., 17 in. overall length
(see more)
Fits the following BMW 525i Years:
  • 1989-1993 | 6 Cyl 2.5L | Base
$194.27 List Price $251.41 Save $57.14 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
  • 50-State/California Legal
  • Semi-universal design – cut out your old catalytic converter and weld in the new one
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These semi-universal 50-State Legal catalytic converters have a catalyst specifically designed for your vehicle – just cut out your old catalytic converter and weld in the new one.  Engineered to cut emissions and improve performance.

  • SKU#: M66332008
  • Brand: Magnaflow
  • Fit Note: PRE-OBDII, EO# D-193-117, OE Spec
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-193-117
(see more)
Fits the following BMW 525i Years:
  • 1989-1995 | 6 Cyl 2.5L | Base
$237.71 List Price $280.50 Save $42.79 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
DAVICO EXACT FIT 49-STATE MANIFOLD CATALYTIC CONVERTER

Do not settle for a universal or generic catalytic converter when you can replace your old or failing catalytic converter with a direct fit unit from Davico Manufacturing. This company has been producing catalytic converters since 1987 and is known for producing direct fit aftermarket catalytic converters that are at par with OEM units in terms of quality, specifications, and performance. Their Exact Fit Catalytic Converter is sized specifically for each application and uses the right substrate to meet the aftermarket performance standards for catalytic converters.

Features:
  • Direct fit - made using reliable computer-controlled fabrication system for flawless replication
  • Manufactured using strict OEM and emission control specifications
  • No cutting, sliding, clamping, or welding required for easier installation
Specifications:
  • 6-bolt fixed flange inlet
  • 2-bolt fixed flange outlet
  • 2 oxygen sensor ports
  • Round body

Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: DAV17112
  • Brand: Davico
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
(see more)
Fits the following BMW 525i Years:
  • 2004-2005 | 6 Cyl 2.5L | Base
$297.81 List Price $649.70 Save $351.89 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
CATCO CATALYTIC CONVERTER ASSEMBLY

Catco catalytic converters are designed with 409 stainless steel pipes and shell for longer life.

Specifications
  • 3-bolt flange welded inlet
  • 2-bolt flange with 45-degree flare pipe outlet
  • Standard assembly with one catalytic converter
  • Oval body
  • 66 in. overall length
  • 1.97 in. outlet diameter
  • 2-1 inlet and dual outlet configuration
Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: CAT9072
  • Brand: Catco
  • Fit Note: Sedan, mfrbodycodename : E34, Federal And California Emission Vehicles, Sedan, mfrbodycodename : E34, To 3/95, Federal And California Emission Vehicles, Wagon, mfrbodycodename : E34, Federal And California Emission Vehicles, Wagon, mfrbodycodename : E34, To 3/95, Federal And California Emission Vehicles, mfrbodycodename : E34, Federal And California Emission Vehicles
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 66 in. overall length
(see more)
Fits the following BMW 525i Years:
  • 1991-1995 | 6 Cyl 2.5L | Base
View All
$161.75 List Price $344.28 Save $182.53 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
WALKER CALCAT CATALYTIC CONVERTER

Walker CalCat premium quality catalytic converter is specifically designed to meet with the California Air Resource Board (CARB) regulations both for Pre-OBD and OBDII vehicles. Featuring OE-style design to assure you will get precision fitting.

Note:
  • Catalytic converter legal for sale in California under Executive Order (EO) number D-182-54. Before purchasing this product, please check the Executive Order at www.arb.ca.gov to verify whether this product is allowed for installation on your specific vehicle application.
  • SKU#: WK80833
  • Brand: Walker
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: Same day - 1 business day
(see more)
Fits the following BMW 525i Years:
  • 1989-1995 | 6 Cyl 2.5L | Base
$245.52 List Price $320.94 Save $75.42 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)

FLOWMASTER – 50 STATE LEGAL SEMI-UNIVERSAL CATALYTIC CONVERTER

Failed the smog test because of a malfunctioning stock catalytic converter that has come to the end of its life? Don’t panic and send your vehicle off to the junkyard when everything else is running smoothly. Replace that old catalytic converter with a new Flowmaster 50 State Semi-Universal Catalytic Converter and go back in for a retest. Since installing a new converter from any car dealer is exceedingly expensive, using a Flowmaster is a much better alternative. After installing a Flowmaster 50 State Legal Semi-Universal Catalytic Converter, your car, truck or SUV will have a much better chance of passing the smog test and it will not trip check engine lights as well. Flowmaster known as ‘the exhaust technology company,’ is a leading manufacturer of high performance exhaust systems and respected for design, innovation and engineering.

  • Great for replacing worn out factory original catalytic converters
  • Designed and manufactured in U.S.A.
  • Meticulously engineered internals with the correct precious metals won’t set off check engine lights
  • Mandatory in all states that adopted strict California vehicle emission standards
  • All California Air Resources Board (CARB) requirements are met
  • Catalyst housing is made from stainless steel for longevity
  • Made for a wide selection of popular trucks, SUVs and cars

NOTE: Requires clamps, welding or custom fabrication to install

  • SKU#: F133940024
  • Brand: Flowmaster
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-280-100
(see more)
Fits the following BMW 525i Years:
  • 2003 | 6 Cyl 2.5L | Base
$268.73 List Price $317.10 Save $48.37 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
PACESETTER - CATALYTIC CONVERTERS

Replace your sub-par stock converter with a higher performing catalytic converter by Pacesetter Performance. Their converters are fabricated from the finest mandrel-bent stainless steel and feature perfect fit machined steel flanges. Pacesetter, known for their exhausts, has been a leading manufacturer of performance headers and exhaust systems since their inception in 1974.
  • Designed to replace poorly performing OEM converter
  • Streamlines and improves exhaust flow via honeycomb catalyst
  • Made from fine mandrel-bent stainless steel
  • Complies with EPA/CARB regulations
  • Bolts on for quick and easy installation (on most vehicles)
  • Backed by a 5-year/50,000-mile warranty
  • Direct fit by vehicle year, make and model
  • 49-state legal (not legal in CA)
  • Designed and manufactured in the USA
  • SKU#: P40757017
  • Brand: Pacesetter
  • Fit Note: Sedan, RWD
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: Factory replacement
(see more)
Fits the following BMW 525i Years:
  • 2001-2003 | 6 Cyl 2.5L | Base
$369.21 List Price $435.67 Save $66.46 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
BOSAL CATALYTIC CONVERTER

Bosal catalytic converters are made to fit vehicle-specific requirements for backpressure, emissions, sound levels, and sensors. Designed and built for long life reliability.

Specifications:
  • 2 oxygen sensor ports
  • Catalytic Converter with Exhaust Manifold
Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: BO0961279
  • Brand: Bosal
  • Fit Note: Cylinders 1 to 3, 49 State Direct Fit
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: Same day - 1 business day
  • Warranty: 5-year or 25,000-mile Bosal limited warranty
 
Fits the following BMW 525i Years:
  • 2001-2003 | 6 Cyl 2.5L | Base
$475.00 List Price $1,425.00 Save $950.00 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
BENCHMARK CATALYTIC CONVERTER ASSEMBLY

Benchmark catalytic converters are considered to be the industry's standard replacement catalytic converter. It is the recognized leader in fitment and durability. It features perfect fit and repeatability and its performance results are continually monitored by Benchmark's internal emissions laboratory to insure quality loadings which eliminate OBDII issues caused by many universal catalysts.

Specifications
  • With oxygen sensor port
  • Manifold type assembly with one catalytic converter
Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: BEN1402F
  • Brand: Benchmark
  • Fit Note: For Cylinders 1 to 3
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Benchmark limited warranty
 
Fits the following BMW 525i Years:
  • 2001-2003 | 6 Cyl 2.5L | Base
$554.92 List Price $654.81 Save $99.89 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
DORMAN CATALYTIC CONVERTER

When it comes to selecting the right manufacturer for your Exhaust Manifold, depend on Dorman. Exactly engineered just like the original product that came with your motor vehicle when it was freshly produced from the factory, Dorman's line of original equipment equivalent Manifold type catalytic converter gives fantastic fitting and solid performance. Each and every Dorman OE Replacement catalytic converter, in an effort to accomplish this feat, is designed after exacting industry standard. 49-state legal.

Specifications:
  • Steel
  • Includes gaskets and hardware
  • SKU#: RB674898
  • Brand: Dorman
  • Fit Note: Cylinders 4, 5 Or 6, Combined Manifold And Converter Assembly
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: Same day - 1 business day
  • Warranty: Lifetime Dorman limited warranty
 
Fits the following BMW 525i Years:
  • 2001-2003 | 6 Cyl 2.5L | Base
View Less