Genuine BMW M Performance Exhaust Silencer Backbox for BMW 1 Series F20 F21 M135i M135iX M135i xDrive N55
Upgrade your BMW 1 Series with the Genuine BMW M Performance exhaust silencer. This OEM rear silencer, muffler, backbox is designed specifically for the M135i and M135iX with the N55 engine, delivering a deeper, richer straight six exhaust note while maintaining long distance comfort. If you are searching for BMW M135i exhaust, M135i backbox, M135i muffler, M135i M Performance exhaust, F20 M135i exhaust, F21 M135i exhaust or genuine OEM BMW M Performance silencer, this is the factory solution that fits right and sounds right.
We have supplied and fitted many of these systems for M135i owners and customer feedback has been consistently excellent. Expect an authentic BMW M Performance tone, reduced exhaust back pressure and perfect OEM fitment with premium stainless steel construction.
Key features
- Genuine BMW M Performance part for M135i and M135iX N55
- Refined, distinctive straight six sound inside and out
- Volume optimised by BMW to enhance character without compromising comfort
- Reduced exhaust back pressure
- High grade stainless steel for durability and corrosion resistance
- Engineered with CAD and FEM for optimal fit and OEM quality
- Direct replacement rear silencer, backbox, muffler
What is included
Rear silencer assembly only. Exhaust tips are not included. Optional BMW carbon or chrome tailpipe finishers are available separately for a premium, factory look.
Compatibility
- BMW 1 Series F20 M135i and M135iX 5 Door Hatchback N55 from April 2011 to Present
- BMW 1 Series F21 M135i and M135iX 3 Door Hatchback N55 from December 2011 to Present
Search terms covered: BMW M135i exhaust, F20 M135i exhaust, F21 M135i exhaust, M135i xDrive exhaust, M135i muffler, M135i backbox, BMW M Performance exhaust M135i, OEM BMW exhaust M135i N55.
Part number
18302349989 Silencer System
Manufactured by
BMW Genuine BMW Performance Parts
Fitting and installation
Professional installation is recommended. We offer fitting at Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Compatibility check before dispatch
We will verify compatibility before shipping. Provide your UK registration number or the last 7 digits of your VIN at checkout to ensure the correct M135i M Performance silencer for your vehicle.
Warranty
Two years manufacturer warranty for UK customers and one year manufacturer warranty for international customers when a VIN is provided during checkout on compatible vehicles.
Why choose this M135i exhaust silencer
- Genuine OEM BMW quality, fit and finish
- Enhanced M135i exhaust note without harshness
- Trusted by M135i owners, proven results and happy customers
- Ideal upgrade for F20 F21 M135i and M135iX N55 seeking a factory performance sound