BMW 3-Series Mufflers & Resonators

Mufflers and resonators are designed to reduce and change the tone of the noise produced by the vehicle’s internal combustion engine. The level of this noise must be compliant with several norms and regulations. Both devices are incorporated into the vehicle’s exhaust system. They use simple laws of physics to reduce the sound level. A muffler features a series of chambers where gases expand, lose pressure and strength, and hence lowering the noise level. A resonator is designed to cancel a selected range of frequencies through a series of reflections that make the sound waves to eliminate themselves. The muffler of the BMW 3-Series utilizes a vacuum operated valve to decrease the exhaust noise; however, these valves can corrode or get stuck affecting the proper function and even increasing the noise level!

Mufflers and resonators are also prone to deterioration due to exposure to moisture and road salt, while their location makes them exposed to impacts over the rough terrain. If your BMW’s exhaust sounds loud and annoying, you should check the exhaust system and replace the muffler or resonator if needed. In our online store, we have stocked a vast choice of premium BMW 3-Series mufflers and resonators by some of the most well-known brands in the aftermarket industry.