How much does an exhaust replacement cost?

How much does an exhaust replacement cost?


Whether you’ve noticed a rusting exhaust pipe or vibrations from your exhaust system, it’s vital that you replace an exhaust system if it isn’t performing effectively. From your manifold to a catalytic converter, the health of your engine depends on your exhaust system working. So, how much does it cost to replace a full exhaust system or individual parts – and when do you know it needs replacing?

How do you know if your exhaust needs replacing?

With so many various parts of your exhaust to consider, there are many different signs that a part of, or your entire exhaust system will need replacing. Some of the most common signs include:

  • Reduced fuel efficiency – Exhaust leaks can increase engine temperature and reduce efficiency meaning you use more fuel than usual
  • Reduced engine performance – Issues with your catalytic converter may reduce your acceleration power when driving
  • Noises, such as hissing, roaring or rattling parts - May be caused by leaks or loose parts
  • Vibrations – May be caused by a rusty exhaust pipe
  • Burning smell - Leaks in your exhaust system can release hot gases into the engine which can melt plastic parts and cause an unpleasant burning smell
  • Gas smell - Caused by leaks in your exhaust system
  • Check Engine Light – If your check engine light turns on, you should get to a garage as soon as possible
  • Rusting or sagging parts – You may notice rusting or sagging parts at the back of your vehicle

You should always ask for advice from a mechanic if you’re unsure about what to do, find local garages near you with our Garage search feature.

How much is a new exhaust?

Made up of many different but equally important parts, the cost to replace an exhaust system will vary depending on your vehicle, the condition of your parts, and labour. A small crack may be fixable but replacing parts will often cost significantly more.

Cost to replace entire exhaust system: While this will vary depending on your vehicle and the garage you choose, you can expect to pay at least £300 to replace an exhaust system on a smaller vehicle like a hatchback, while for larger, luxury vehicles, you may pay in excess of £1,000.

Worried about the costs? With Bumper you could benefit from 0% interest car repair financing and pay for car repairs in instalments in easy to manage monthly payments.

What parts make up an exhaust?

Designed to collect, filter and expel the fumes created by your car’s engine, the main components of your exhaust system include:

How much does it cost to replace an exhaust manifold?

Found at the beginning of your exhaust system, the manifold acts as a funnel for all the fumes and gases emitted from the various cylinders of your engine. Common signs of a faulty manifold are a hissing noise or burning smell caused by a leaking manifold. Often, the problem may be caused by the gasket which helps seal the manifold, if the problem is the manifold itself repairs may be much more expensive.

Cost: £100 (hatchbacks) - £1,300 (luxury vehicles)

The average cost to replace the exhaust manifold gasket is: £200

How much does it cost to replace an exhaust flexi pipe?

This stainless-steel tube, situated between your Oxygen Sensor and Catalytic Converter gives your exhaust line more flexibility when moving and helps to reduce the effect of vibrations on other parts of your engine. If it becomes cracked or broken, you may notice a decrease in engine power, a loud exhaust, or even a dragging exhaust pipe. A simple leak fix may only mean repair and labour costs but replacing a flexi pipe can become very costly.

Cost: £120 (hatchbacks) - £1,000 (luxury vehicles)

How much does it cost to replace catalytic converters?

An integral part of your exhaust system, your catalytic converter helps clean your car’s exhaust emissions - reducing the level of pollution released from your car into the air. You can expect to pay at least £150, but luxury vehicles may cost in excess of £500.

Cost: £150 (hatchbacks) - £500+ (Luxury vehicles)

How much does it cost to replace oxygen sensors?

Your car’s oxygen sensors help to monitor the level of oxygen and other gases in your exhaust fumes, feeding back information to your engine to help maintain optimum performance. If it isn’t working correctly, you might experience a drop in performance and see your check engine light come on.

The average cost to replace the oxygen sensor is: £150

How much does it cost to replace exhaust clamps?

The simplest piece of equipment in your exhaust system, clamps help to keep all of your pipes attached to the vehicle without the need for welding. You should be able to tell if your clamp is loose as you may notice your pipes sagging, dragging or hear a rattling noise from your exhaust.

The average cost to replace the exhaust clamp is: £30-£50 (plus labour)

How much does it cost to replace a backbox/muffler?

The muffler, also known as a backbox, helps reduce noise from your exhaust system. The pressure caused by the release of your exhaust fumes can cause a lot of noise. These acoustic devices help to dampen noise before the gas is released out through your exhaust pipe

Cost: £75 (hatchback) - £425 (luxury vehicle)

Think your exhausts may need replacing? Search for a local Bumper partner garage on our website and benefit from 0% interest, monthly payments on your exhaust repairs. Find out more about how 0% car finance works.

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