Exhaust› Mufflers and Resonators

BMW

Rear Muffler and Center Resonator

$868.73

SKU: 18100443581

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The BMW 18100443581 is a genuine BMW silencer system. It is designed as a direct replacement part for compatible BMW vehicles. This component is built by BMW using reliable materials to ensure long-lasting performance and durability.
Show original supplier description
The Genuine BMW Silencer System, part number 18100443581, is a direct replacement component designed to enhance the exhaust note of specific BMW E90 and E91 models. This two-piece system comprises the rear muffler and center resonator, delivering a sound that is described as mildly more aggressive than stock, with a pleasant, throaty growl when revved. This factory BMW accessory is noted for its exceptional quality and great fitment. For installation, some models may require cutting the stock exhaust after the resonator, while others may already be configured as a two-piece system. A BMW factory exhaust clamp is included for mounting to the factory cat section, and exhaust sealing paste is recommended for a leak-free installation. This silencer system is compatible with 6/2006+ E90 BMW 325i, 325xi, 328i, 328xi, 328i xDrive, 330i, 330xi sedans, and 6/2006+ E91 BMW 325xi, 328i, 328xi, 328i xDrive wagons. It is also referred to as a muffler or exhaust resonator. Please note that this part has been superseded by part number 18102208793 and may be discontinued or no longer available through some retailers.
Vehicle Symptoms
  • Excessive exhaust noise while driving
  • Rattling or buzzing sound from under car
  • Noticeable exhaust drone at highway speeds
  • Visible rust or holes on the muffler
  • Exhaust smell entering the cabin
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Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandBMW
Part Number18100443581
CategoryExhaust
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1M+ Enthusiasts
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(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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