BMW E81 E82 X1 E84 E87 E88 E90 E91 E92 E93 Rear Silencer Knurled Bolt 7534179

The BMW Rear Knurled Nut for Final Muffler Mounting is an original assembly part designed for the exhaust system of 1 Series, X1, and 3 Series models. Thanks to its precise manufacturing and fit to factory mounting points, it ensures stable support for the rear muffler and safe operation of the entire exhaust system in BMW vehicles.

Specifications and technical data

• SKU: 7534179
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7534179
• Substitutable numbers: 7534179, 18307534179
• Location on the vehicle: Rear
• Category: Clamps, Flanges, Hangers & Hardware

Application and Compatibility

The presented rear muffler knurled nut has been designed for installation at the rear of the vehicle, in the area of the final muffler mounting. This component is used in popular BMW models from the 1 Series, X1, and 3 Series families, which helps maintain the structural integrity of the exhaust system and reduces the risk of improper fit.

Thanks to the factory thread geometry and screw head, it is possible to securely tighten it in the original mounting points, without the need for modifications or the use of non-factory solutions.

Technical Characteristics of the Assembly Component

The screw features a knurled working part, which improves its anchoring in the socket and reduces the possibility of uncontrolled loosening of the connection during exhaust system operation. This design helps maintain the correct position of the rear muffler relative to the body and other exhaust components.

As a component from the Clamps, Brackets, Flanges, and Mounting Parts group, the screw works with other mounting components, creating a cohesive system for supporting and guiding the exhaust system. A correctly selected and installed assembly component helps reduce vibrations transferred to the body and decreases the loads acting on welds and pipe connections.

Benefits of Using an Original BMW Part

Using an original BMW knurled nut in the rear part of the exhaust system allows for maintaining factory operating parameters and connection durability. The component has been specifically designed for the loads occurring in the area of the rear muffler, which translates to stable mounting and predictable system behavior in the long term.

Using an original assembly component is a sensible choice when you want to preserve the factory design while avoiding problems typical of random aftermarket parts with uncertain manufacturing tolerances.

Service Purpose and Installation

The screw is intended for service work at the rear of the vehicle, particularly for:

• replacing the rear exhaust muffler,
• repairing or refitting the exhaust system,
• eliminating play and unwanted vibrations in the muffler mounting area.

Choosing an original assembly component makes the mechanic's job easier, reduces installation time, and minimizes the risk of needing further intervention in the exhaust system after a short period of use.

BMW Mounting System Expansion

If you are planning a comprehensive repair or upgrade of the exhaust system area in your BMW and need other parts 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.

How to Effectively Assemble Used Mounting Components

When working on the exhaust system, it is advisable to plan the purchase of a complete set of mounting elements at once to avoid service downtime and fitting issues. You can read about how to efficiently assemble original used components – from larger assemblies to small screws and clips – in the article Comprehensive Sourcing: From Engine to the Smallest Clip – How to Assemble Used Car Parts in One Place?, which discusses the advantages of the One-Stop-Shop approach and how to avoid low-quality aftermarket parts.