BMW cars are famous for their power and smooth handling, but when your BMW’s exhaust system shows signs of a problem, your car’s performance will be affected. If you hear loud sounds, reduced performance, or an unusual smell from the vehicle, it is probably a problem with the exhaust system. The exhaust system serves the function of removing toxic fumes from your engine and, at the same time, improving the efficiency of your BMW. A hitch can result in poor mileage, mechanical problems with the engine, and even dangerous emissions of hazardous gases.
Common Causes of BMW Exhaust System Problems
- Catalytic Converter Failure: The catalytic converter helps to decrease dangerous emissions, but it may become blocked by carbon deposits. A bad catalytic converter may cause the check engine light to turn on, slow acceleration, and a smell of rotten eggs. If it is not attended to, it can cause overheating and result in additional problems with the exhaust system.
- Muffler Damage: Rust and other elements on the road can cause the muffler to develop small holes or cracks, which makes it louder. A bad muffler generates more noise and hampers the air circulation inside the engine compartment, affecting the engine’s performance. In extreme cases, it can lead to a complete separation or sagging of the exhaust system.
- Cracked Exhaust Manifold: The exhaust manifold is one of the most exposed parts of the engine. It is subjected to very high temperatures and pressures, which causes it to crack or deform. This can lead to an exhaust leak, which in turn emits poisonous gases and causes poor engine performance. A crack in the manifold can also produce a ticking sound that increases with acceleration, and it may also cause poor performance.
- Damaged Exhaust Hanger: Exhaust hangers hold the exhaust system in place on the car’s chassis, and like any other component, they can wear out over time due to constant vibrations. If the hangers become weak or broken, the exhaust system will sag or rattle, misalign other parts, and cause damage to the system altogether. This can lead to a lot of vibrations, and in the worst scenarios, cracks may develop in the exhaust pipes.
How to Fix BMW Exhaust System Issues
- Check and Tighten Leaks: The first step is to look at the pipes, gaskets, and joints for signs of rust, cracks, or loose connections. If there is leakage, you can start by tightening the bolts, applying high-temperature sealant to small cracks, or replacing worn-out gaskets to rectify the problem. Larger leaks or sections that have severely rusted should be welded, or new parts should be fitted in their place.
- Replace a Failing Catalytic Converter: If the catalytic converter is clogged and causing poor car performance or turning on the check engine light, it will have to be replaced. A professional mechanic can do an emissions test and check for any blockage. While some minor clogs may be cleared, a completely blocked or damaged converter has to be replaced to avoid further damage to the exhaust system.
- Replace Other Components: If the muffler is rusted or leaks, it should be replaced to decrease its noise and improve the exhaust gases that pass through it. Also, check the exhaust manifold for cracks since even the smallest crack may affect the vehicle’s performance.
- Contact a Mechanic: If exhaust problems persist after the repairs have been made, it is advisable to seek the services of a professional mechanic. Professional repairs also guarantee that the car will be reliable in the long run and in its best condition.
How Momentum Motorworks Can Help
If you own a BMW and are located in the Alabama area, 
you can trust Momentum Motorworks to carry out BMW repair and maintenance services, including exhaust system repair. Whether you have exhaust leakages, a bad oxygen sensor, a faulty catalytic converter, or any other problem related to the exhaust system, our professional mechanics will be able to identify and repair the problem within the shortest time possible.
We are located in Birmingham, Alabama, and we work with clients from Pelham, Mountain Brook, Vestavia, Homewood, Alabaster, and Helena, Alabama. Over the years, we have been working on BMWs and other German cars, and we offer the best services to ensure that your car is well-serviced. You can contact us now to book an appointment for an inspection and to have your BMW performing as good as new.