Catalytic Converter Holder BMW E87 LCI E90 N47 Exhaust Support Bracket 7803613

Catalytic Converter Holder BMW E87 LCI E90 N47 Exhaust Support Bracket is an original exhaust system mounting component, designed for BMW 1 and 3 series diesel engines. Thanks to its factory geometry, it provides stable support for the catalytic converter, reduces unwanted vibrations, and helps maintain the correct position of the entire exhaust section. This is a practical solution for users who want to restore proper catalytic converter mounting after repairs or exhaust system modifications.

Specifications and technical data

• SKU: 8515445
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8515445
• Substitutable numbers: 18208515445, 8515445, 18207803613, 7803613, 18307802509, 7802509, 18207797588, 7797588
• Fuel type: Diesel
• Category: Other Exhaust & Emission Parts

Purpose and function in the exhaust system

The presented bracket is a component from the Clamps, brackets, flanges, and mounting parts group, responsible for the rigid yet controlled mounting of the catalytic converter in BMW diesel cars. Its purpose is to:

• maintain the correct position of the catalytic converter relative to other exhaust sections,
• reduce loads transferred to welds and pipe connections,
• limit vibrations and stresses generated during N47 engine operation,
• stabilize the system during load and temperature changes.

Thanks to its fitment for the specific chassis architecture of the BMW E87 LCI and E90, the bracket works with factory mounting points, which facilitates installation and allows for maintaining the original exhaust routing line.

Original origin and mounting compatibility

As a BMW brand part, the bracket has been designed for full compatibility with the factory catalytic converter and associated components. This means:

• maintaining the correct mounting geometry without the need for modifications,
• secure fitment with original bolts, clamps, and holders,
• compatibility with the body support structure and heat shields.

The element has a dedicated OEM part number and assigned interchangeable numbers, which facilitates compatibility verification via VIN or manufacturer catalogs. This allows for precise selection of the bracket for a specific exhaust system configuration in a given BMW vehicle.

Performance characteristics and application benefits

The catalytic converter mounting bracket for the N47 diesel engine operates in a demanding environment – near hot exhaust system components and the undercarriage. Using an original mounting component allows you to:

• minimize the risk of pipe and weld cracks resulting from improper support,
• reduce noise and resonance transmitted to the cabin,
• maintain the correct alignment of the catalytic converter relative to sensors and other components,
• ensure predictable exhaust system behavior over a long service life.

This is particularly important in diesel units, where the fuel type generates characteristic vibrations and dynamic loads. Proper catalytic converter mounting translates into more stable operation of the entire exhaust system.

Condition, origin, and use in service practice

The offered item is used, which makes it an attractive cost-effective alternative to new parts while maintaining the original BMW specification. In service practice, it will prove useful for, among other things:

• replacing a damaged or corroded catalytic converter holder,
• post-collision repairs where the exhaust system has been displaced,
• restoring factory mounting after previous modifications or non-original alterations.

To facilitate identification in the store system, the product has an assigned SKU, which allows for quick verification of its compliance with the order and other mounting components.

Complementary BMW mounting elements

If you are planning a comprehensive repair or upgrade of the exhaust system area in your BMW and need other elements from the same group, such as additional clamps, brackets, or mounting flanges, check the available parts in the BMW Clamps, brackets, flanges, and mounting parts category.

If you want to better understand why used original BMW mounting elements are currently so often chosen for servicing premium cars, it is worth reading the article on our blog: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026.