What Are The Most Common Problems Of An Exhaust System?

Female auto repairer working in the shop on a car Exhaust System

The functioning of your car’s exhaust system affects its overall condition and efficiency. The system is composed of many components, and it can only function effectively provided they all cooperate. When one component falls short of the others, the system as a whole malfunctions. Even while we wish for our infrastructure to function properly, we are aware that plans occasionally fail to pass.

The most frequent exhaust system issues, like a malfunctioning oxygen sensor, exhaust leaks, exhaust smoke, rust, broken hangers, vibrations, as well as boosted engine noise, are covered in this blog. You will also learn how to avoid these issues with your car, but remember that if you ever get into trouble help is available at custom exhaust UK.

Leaks In The Exhaust System

When dangerous gases escape your exhaust system before they make it to the tailpipe, you have an exhaust leak. Because a leaky exhaust system makes it more difficult for the exhaust system to get rid of fumes, you run the risk of being exposed to deadly chemicals like carbon monoxide. An exhaust leak exacerbates your car’s atmospheric footprint and also has a detrimental effect on the engine’s efficiency in general. Over time, exhaust leaks may arise and are fairly common. When you turn a car on and off, your exhaust system gets subjected to high temperatures, which over time leads to the development of leaks or holes in your exhaust.


Rust is the enemy that poses the greatest threat to the exhaust system. If you have a reputation for taking shorter travels rather than longer ones, your system can be more prone to rust. Water vapour can build up in the exhaust system from many short journeys, but it does not get hot enough to burn off. Its dampness will eventually convert to rust, corroding your exhaust system from the inside out. In addition, untreated salt from the nation’s snowy regions can cause rust. Regular cleaning needs to be handled by skilled mechanics to inspect the vehicle for rust.

Oxygen Sensor Malfunction

An essential part that gauges the amount of oxygen in exhaust gases and feeds that information back to the engine control unit (ECU) so it may modify the air-fuel mixture is the oxygen sensor. A malfunctioning oxygen sensor may result in higher exhaust emissions, decreased engine performance, & poor fuel economy.

Severe soot accumulation, oil pollution, or just the age of the sensor are typical reasons for oxygen sensor failure. Usually, replacing the malfunctioning oxygen sensor is necessary to fix this problem. Be certain that the sensor you use fits the make and model of your car, along with making sure you attach it according to the manufacturer’s instructions. Engine performance and fuel efficiency may be restored by replacing a defective oxygen sensor. 

Man try to fix a car engine exhaust system problem on a local road

Image Source Freepik

Broken Hangers

The useful tiny components known as hangers are designed to keep your car exhaust system from rattling about if you take a bump. They aid in keeping your car’s exhaust firmly attached. Naturally, they are not unbeatable. All of the exhaust pipes are free to be moved once the hanger breaks and falls off. Their movement could result in cracks, dents, and, in rare situations, the complete exhaust system breaking off. Regular inspections of your exhaust system hangers are necessary to make sure that none of them are damaged or missing entirely.

An Increase In Engine Noise

Typically, a rise in engine noise is the most obvious indication of an exhaust leak. The manifold on your system or any of the connections throughout the exhaust system is likely to be the source of an exhaust leak. In addition to raising the engine’s volume, a manifold leak might allow poisonous gases into the passenger compartment. This is a significant problem which needs to be fixed right away.


Clogs or blockages in an exhaust system happen frequently. They may result from the accumulation of carbon in the catalytic converter or from dirt or soot seeping into the exhaust pipe. Smaller blockages tend to be cleared by the exhaust system on their own, but larger jams can lead to issues. A significant obstruction will make the engine strain harder to force the exhaust out, this lowers performance and uses more fuel. Although blocked exhaust systems are more difficult to diagnose than other exhaust issues, you should typically hear chugging or clanging sounds, experience slower engine performance, also notice higher fuel usage.

Final Words

Motorists can guarantee the proper running of their cars by taking prompt action by being aware of the most prevalent exhaust system issues. It is imperative to swiftly attend to concerns such as exhaust leaks, malfunctioning oxygen sensors, catalytic converter failure, & silencer damage to prevent additional harm & preserve peak engine efficiency.

Leave a Reply

Your email address will not be published. Required fields are marked *