A vehicle’s exhaust system is an important component, as it performs multiple functions in ensuring a safe and efficient ride. An unhealthy exhaust system can create noise pollution, increase fuel consumption and even reduce performance. In this article will discuss signs of exhaust system issues, how to diagnose them, and what repair or replacement options are available.

Overview of Exhaust System

The exhaust system is part of vehicle’s powertrain and consists of several components that work together to release exhaust gases. The parts include the exhaust pipe, muffler, catalytic converter and oxygen sensor. These components are designed to reduce noise levels, decrease fuel consumption and keep toxic fumes from entering the air.

Identifying Exhaust Issues

It is important to be aware of any signs of potential issues in your exhaust system in order to prevent further damage or costly repairs. Some common signs include:

  • excessive noise from the engine,
  • noisy exhaust when accelerating,
  • reduced fuel efficiency,
  • and visible leaks coming from the pipes or mufflers

As a side tip – it is always a good idea to inspect your vehicle’s exhaust system on a regular basis for wear and tear.

Signs of Exhaust System Issues

  • Excessive Exhaust Noise

    The most common sign of an unhealthy exhaust system is excessive noise coming from the engine or muffler. This sound can be attributed to a damaged or broken muffler, worn out pipes or loose fittings. If you start to notice any strange noises coming from your vehicle, it could indicate that there’s an issue with the exhaust system that needs attention.

  • Noisy exhaust when accelerating

If you notice your vehicle’s exhaust becoming noisier when accelerating, it is likely due to a faulty catalytic converter. The catalytic converter helps reduce emissions and can become clogged over time, causing increased noise levels.

  • Reduced Fuel Efficiency

A malfunctioning exhaust system can also affect fuel efficiency as it may not be releasing gases properly due to leaks or faulty components. This can cause the engine to work harder, using more fuel in the process. If your vehicle seems to be using more gas than before, it could be a sign that there’s an issue.

  • Visible Exhaust Leaks

If you look underneath your vehicle and notice any visible leaks from the exhaust or rust on the pipes and mufflers, it could indicate a malfunctioning system. An indication to repair these leaks (the sooner, the better) as they can cause further damage to other components and increase noise levels within the cabin of the vehicle.

Diagnosing Exhaust System Issues


1. Visual Inspection

Before taking your vehicle to a mechanic for repairs or replacement, you might check for signs of potential exhaust system issues. This can be done by visually inspecting the pipes, mufflers and catalytic converter for any visible damage or leaks. You can also check for rust on the components as this can indicate corrosion which could lead to further problems down the line.

2. Professional Diagnostic Test

If you suspect that there’s an issue with your vehicle’s exhaust system, consider taking it to a local exhaust fitter for a professional diagnostic test. The mechanic will use specialised equipment to “listen” to the engine and pinpoint any potential issues within the exhaust system such as faulty components or broken pipes.

Repairing Exhaust System Issues


  • Repairing Exhaust Leaks

The most common way of repairing exhaust leaks is by replacing damaged or worn out components. This could include replacing the pipes, mufflers and catalytic converter depending on what has been identified as the cause of the issue. We advise using quality and genuine parts when doing these repairs in order to ensure optimal performance and longer-lasting results.

  • Replacement Options

In some cases, it may be more cost effective and efficient to replace the entire exhaust system rather than making individual repairs. If your vehicle’s exhaust system is severely damaged due to corrosion or wear & tear, then a full replacement may be necessary. This can be done at most auto repair garages using either factory-grade parts or aftermarket replacements depending on your budget and preferences.

The takeaway

Being aware of the signs of potential exhaust system issues might help in order to prevent further damage or costly repairs. If you start to notice any strange noises coming from your vehicle, reduced fuel efficiency or visible exhaust leaks, it could indicate an issue with the system that needs to be addressed. If this is you, and you live in Leicester (or the surrounding areas) don’t let your vehicle suffer – bring it in, and our exhaust fitters will take a proper inspection. Depending on what has been identified as the cause of the problem, repairs or replacement may be necessary.



What is a blown exhaust?

A blown exhaust is when there’s an issue with the exhaust system, such as a leak or break in one of the pipes. This can cause engine noise to be louder than usual.

Is it safe driving with blown exhaust

It is not recommended to drive with a blown exhaust. It could be dangerous as it may cause noxious emissions to enter the interior of the vehicle, which can be harmful to your health. Additionally, a blown exhaust is likely to cause your engine to run inefficiently.

Can an exhaust damage the engine?

If left unchecked, a faulty exhaust system can cause damage to the engine over time. Exhaust leaks can cause the engine to run inefficiently, leading to increased fuel consumption and decreased performance.

What is a professional diagnostic test?

A professional diagnostic test is a service conducted by an expert mechanic to detect any issues within the exhaust system.

Can an exhaust cause a fire?

An exhaust system can cause a fire if the components are not installed properly or there’s an excessive build-up of heat.

Why Can I Smell Exhaust Fumes?

If you can smell exhaust fumes, it is likely that there’s an issue with your vehicle’s exhaust system. This could be due to a leak or crack in one of the pipes, which can cause noxious fumes to enter the interior of the vehicle.