.jpeg?q=90&p=thumb&w=200&h=200)
.jpeg?q=90&p=thumb&w=40&h=40)
Brakes 
Driveline 
Electronics 
Handlebars & Controls 
Package Deals 
Wheel Accessories 
Wheels by Vehicle 
Tools and Maintenance 
Universal & Repair 
Vivid Racing Gear 
See more parts for BMW 545i
Select the year of your BMW 545i:
MagnaFlow 49789 Direct-Fit Catalytic Converter
If you're a proud owner of a 2004-2005 BMW 545i, 645Ci, 745i, or 745Li, the MagnaFlow 49789 is the perfect solution for your exhaust needs. This OEM Grade Manifold Catalytic Converter is designed to keep your engine running smoothly while ensuring you stay compliant with Federal and EPA emissions standards.
Key Features
- Overall Length: 30.25 inches
- Substrate Material: Ceramic for optimal performance
- Body Material: Durable Stainless Steel for enhanced longevity
- Converter Quantity: 1
- Inlet Attachment: Bolt-On for easy installation
- Mounting Hardware Included: Yes, for a hassle-free setup
- Series: OEM Grade for reliable performance
- Finish: Polished Stainless Steel for a sleek look
- Type: Direct-Fit, no cutting or welding required
Why Choose MagnaFlow 49789?
With its free-flowing mandrel-bent tubing and corrosion-resistant construction, the MagnaFlow 49789 is engineered for performance. The advanced manufacturing process, including state-of-the-art 3D scanning technology, ensures that this catalytic converter fits and functions just like the original equipment. The single laser fusion weld design minimizes the risk of leaks, while its compact, low-mass structure enhances thermal efficiency.
Installation Made Easy
Installing the 49789 is straightforward, making it a great choice for DIY enthusiasts. The included gaskets and mounting hardware mean you won't have to worry about reusing corroded factory parts. Just grab your tools, and you're ready to go—no cutting or welding necessary!
Fitment
This direct-fit catalytic converter is compatible with the following models:
- BMW 545i (2004-2005)
- BMW 645Ci (2004-2005)
- BMW 745i (2004-2005)
- BMW 745Li (2004-2005)
It also interchanges with OE part number 18 40 7 522 555, ensuring a seamless replacement experience.
Customer Feedback
BMW 545i owners have reported that after installing the MagnaFlow 49789, their check engine light stayed off, and they noticed an improvement in exhaust flow. One owner mentioned, "The installation was a breeze—fit perfectly and no more exhaust leaks!”
Final Thoughts
For BMW owners looking to maintain performance and compliance with emissions regulations, the MagnaFlow 49789 is a smart choice. Its durability, ease of installation, and reliable performance make it a must-have for your 2004-2005 BMW.
Other Part Numbers:
MagnaFlow #mag49789
Proposition 65
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Vehicle Make/Model | Year | Trims |
|---|---|---|
| BMW 545i | 2004-2005 | Base |
| BMW 645Ci | 2004-2005 | Base |
| BMW 745Li | 2004-2005 | Base |
| BMW 745i | 2004-2005 | Base |
Discover MagnaFlow: The Leader in Performance Exhaust Systems
When it comes to performance exhaust systems, MagnaFlow stands out as a premier brand known for its commitment to quality, performance, and innovation. Established in 1981, MagnaFlow has built a legacy of crafting exhaust products that enhance the sound and performance of vehicles. With decades of experience in the automotive industry, they have become synonymous with high-performance parts that car enthusiasts trust.
History of MagnaFlow: A Legacy of ExcellenceMagnaFlow began its journey in a small garage, driven by a passion for performance and a desire to create superior exhaust systems. Over the years, they have expanded their product line to include a wide variety of exhaust systems, catalytic converters, and mufflers, catering to both street and off-road vehicles. Their dedication to research and development has allowed them to stay ahead of the curve, continually innovating to meet the demands of modern automotive technology.
Categories of Parts Offered by MagnaFlowMagnaFlow is renowned for its extensive range of products, including:
- Performance Exhaust Systems
- Cat-Back Exhaust Systems
- Universal Mufflers
- High-Performance Catalytic Converters
- Exhaust Tips and Accessories
Each product is designed with precision engineering to improve exhaust flow, enhance horsepower, and provide an aggressive sound that resonates with car enthusiasts. Whether you drive a muscle car, truck, or SUV, MagnaFlow has the perfect solution to elevate your vehicle's performance.
What Makes MagnaFlow the Best Choice?What sets MagnaFlow apart from other brands is their unwavering commitment to quality and performance. Each exhaust system is constructed using durable materials, ensuring longevity and reliability. Additionally, MagnaFlow exhaust systems are rigorously tested to guarantee superior sound and performance, making them a favorite among racers and everyday drivers alike.
At Vivid Racing, we are proud to offer a wide selection of MagnaFlow products. Upgrade your vehicle today and experience the difference that MagnaFlow can make in your driving experience!
PERFORMANCE EXHAUST PRODUCTS WARRANTY
The manufacturer warrants that all MagnaFlow Performance Products are free from defects. Most of our exhaust products are warranted against blowouts and defects in material and workmanship for as long as the original purchaser owns the vehicle on which it was originally installed. The warranty is void if the exhaust products are not installed properly on the vehicle for which it is designed.
This warranty does not apply to any exhaust product which has been installed on any commercial or racing vehicle or which has been improperly installed, altered, or subjected to misuse or damage from accidents. Also, cost of labor and any additional parts required to complete installation of a replacement product are not covered by this warranty.
The warranty certificate, along with proof of purchase, MUST be presented to the service outlet from which you originally purchased the exhaust product, or any participating dealer, when making a claim for replacement. The original exhaust product must also be returned and exchanged for a new exhaust product of the same part number.
No other warranty, expressed or implied (including merchantability), applies to the exhaust product, nor is any person or the manufacturer authorized to assume any other warranty. The manufacturer does not assume any responsibility for any consequential damages occurred by the exhaust product, or inconvenience or interruption in any operation.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Original Warranty Certificate and Installation Statement:
To be completely filled out by installer and returned to manufacturer. Include dealer name, complete address and phone number. Include customer name, complete address and phone number. Vehicle make, year, model, engine size, mileage and date must be filled out. The part number installed must be filled out. The Installation Statement must be completed by installer, stating the reason for replacement. Vehicle owner and installer must sign and date the Warranty Certificate /Installation Statement.
Catalytic Converter Warranty Statement Installer's Copy:
To be retained by Installer with copy of the invoice for six (6) months.
Customer's Copy:
To be retained by the vehicle owner.
Catalytic Converters are emission control devices which are designed to last the life of the vehicle and do not normally require replacement. Furthermore, if the vehicle is properly used and maintained, original converters are covered by the emission control warranty for 8 years or 80,000 miles. Federal law prohibits repair businesses from replacing these devices except under certain limited circumstances. In order to verify that proper circumstances exist, the owner of the vehicle on which such repairs are made and a facility representative must sign the required statements on the warranty card. To avoid failing a warranty audit, please follow the instructions to ensure the new cards are filled out correctly and distributed accordingly.
MOTORCYCLE PRODUCTS WARRANTY
MagnaFlow motorcycle exhaust products, including Arlen Ness by MagnaFlow exhaust systems, are warranted against defects in material and/or assembly workmanship only for a period of 1 year from invoice date. This Warranty is void if the Product is not installed properly on the vehicle for which it is designed. This Warranty does not apply to any Product which has been installed on any commercial or racing vehicle or which has been improperly installed, modified, altered or subjected to misuse or damage from accidents; including excessive heat. Also, cost of labor and any additional parts or components required to complete installation of a replacement Product are not covered by this Warranty; including coatings, paints and/or finishes, flaws or rust. MagnaFlow including Arlen Ness by MagnaFlow exhaust systems are designed to fit and operate on original OEM motors and chassis with no modifications of any type on the motorcycle.
Proof of purchase from an authorized retailer must accompany any warranty claim. The original Product that is deemed to be under warranty may only be returned and/or exchanged for a Product of the same part number. No other warranty, expressed or implied (including merchantability), applies to the Products, nor is any person including the manufacturer authorized to assume any other warranty. Dealers and distributors are not authorized to make warranty judgments or claims regarding MagnaFlow products. The manufacturer does not assume any responsibility for any consequential damages occasioned by the Product, or inconvenience or interruption in any operation, service or shipping. All approved warranty returns must be accompanied by a return authorization number. Parts returned to MagnaFlow without a return authorization and accompanying documentation may be refused. No parts will be accepted with freight due.
This warranty gives you specific legal rights. You may also have other rights which may vary from State to State. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
The warranties set forth herein are exclusive and, unless otherwise required by applicable law, no other warranties are made by MagnaFlow or are authorized to be made with respect to the Product.
The manufacturer warrants that all MagnaFlow Performance Products are free from defects. Most of our exhaust products are warranted against blowouts and defects in material and workmanship for as long as the original purchaser owns the vehicle on which it was originally installed. The warranty is void if the exhaust products are not installed properly on the vehicle for which it is designed.
This warranty does not apply to any exhaust product which has been installed on any commercial or racing vehicle or which has been improperly installed, altered, or subjected to misuse or damage from accidents. Also, cost of labor and any additional parts required to complete installation of a replacement product are not covered by this warranty.
The warranty certificate, along with proof of purchase, MUST be presented to the service outlet from which you originally purchased the exhaust product, or any participating dealer, when making a claim for replacement. The original exhaust product must also be returned and exchanged for a new exhaust product of the same part number.
No other warranty, expressed or implied (including merchantability), applies to the exhaust product, nor is any person or the manufacturer authorized to assume any other warranty. The manufacturer does not assume any responsibility for any consequential damages occurred by the exhaust product, or inconvenience or interruption in any operation.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
- Stainless Steel Systems: Limited Lifetime Warranty against Manufacturing Defects
- Black Finish Systems: 1 Year Warranty on Black Finish, Limited Lifetime Warranty against Manufacturing Defects
- Titanium Finish Systems: 1 Year Warranty on Titanium Finish, Limited Lifetime Warranty against Manufacturing Defects
- Carbon Fiber Systems: Limited Lifetime Warranty against Manufacturing Defects on Stainless Steel, No Warranty on Carbon Fiber
- Aluminized Systems: 1 Year Limited Warranty
- Stainless Steel Mufflers: Limited Lifetime Warranty against Manufacturing Defects
Original Warranty Certificate and Installation Statement:
To be completely filled out by installer and returned to manufacturer. Include dealer name, complete address and phone number. Include customer name, complete address and phone number. Vehicle make, year, model, engine size, mileage and date must be filled out. The part number installed must be filled out. The Installation Statement must be completed by installer, stating the reason for replacement. Vehicle owner and installer must sign and date the Warranty Certificate /Installation Statement.
Catalytic Converter Warranty Statement Installer's Copy:
To be retained by Installer with copy of the invoice for six (6) months.
Customer's Copy:
To be retained by the vehicle owner.
Catalytic Converters are emission control devices which are designed to last the life of the vehicle and do not normally require replacement. Furthermore, if the vehicle is properly used and maintained, original converters are covered by the emission control warranty for 8 years or 80,000 miles. Federal law prohibits repair businesses from replacing these devices except under certain limited circumstances. In order to verify that proper circumstances exist, the owner of the vehicle on which such repairs are made and a facility representative must sign the required statements on the warranty card. To avoid failing a warranty audit, please follow the instructions to ensure the new cards are filled out correctly and distributed accordingly.
MOTORCYCLE PRODUCTS WARRANTY
MagnaFlow motorcycle exhaust products, including Arlen Ness by MagnaFlow exhaust systems, are warranted against defects in material and/or assembly workmanship only for a period of 1 year from invoice date. This Warranty is void if the Product is not installed properly on the vehicle for which it is designed. This Warranty does not apply to any Product which has been installed on any commercial or racing vehicle or which has been improperly installed, modified, altered or subjected to misuse or damage from accidents; including excessive heat. Also, cost of labor and any additional parts or components required to complete installation of a replacement Product are not covered by this Warranty; including coatings, paints and/or finishes, flaws or rust. MagnaFlow including Arlen Ness by MagnaFlow exhaust systems are designed to fit and operate on original OEM motors and chassis with no modifications of any type on the motorcycle.
Proof of purchase from an authorized retailer must accompany any warranty claim. The original Product that is deemed to be under warranty may only be returned and/or exchanged for a Product of the same part number. No other warranty, expressed or implied (including merchantability), applies to the Products, nor is any person including the manufacturer authorized to assume any other warranty. Dealers and distributors are not authorized to make warranty judgments or claims regarding MagnaFlow products. The manufacturer does not assume any responsibility for any consequential damages occasioned by the Product, or inconvenience or interruption in any operation, service or shipping. All approved warranty returns must be accompanied by a return authorization number. Parts returned to MagnaFlow without a return authorization and accompanying documentation may be refused. No parts will be accepted with freight due.
This warranty gives you specific legal rights. You may also have other rights which may vary from State to State. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
The warranties set forth herein are exclusive and, unless otherwise required by applicable law, no other warranties are made by MagnaFlow or are authorized to be made with respect to the Product.
Check out these other great products
Error: Failed to add product
Please refresh the page and try again.