Exhausts have four main functions: to control noise, to direct exhaust fumes away from passengers, to improve the performance of the engine and to improve fuel consumption.

An exhaust is a series of pipes that links the engine to a silencer and a catalytic converter.

The tailpipe is the part of the exhaust that you can see extending from the back of the car. The silencer joins onto the tailpipe, then a series of further pipes joins the silencer to the catalytic converter and then the engine.

The silencer contains metal plates or tubes that have a series of holes bored into them. Exhaust gases leave the engine at very high pressures, and the holes in the silencer help to reduce that pressure so that they leave the car more quietly.

The lambda sensor

The lambda sensor measures and sends oxygen content information back to the engine management system which makes second by second adjustments to the fuel and air mix being used by the engine. This makes sure that harmful gases are burnt efficiently in the catalytic converter. If the lambda sensor becomes faulty, the engine management system sends a default amount of fuel to the chamber – it’s as if you are driving with the ‘choke out’. You may be using more fuel than necessary and might notice your car is not running as smoothly.

Exhaust is an essential element for your engine
The exhaust system is one of the most hard working components of your vehicle. It is constantly in use whilst the engine is running. Also on all vehicles registered after 1993 a catalytic converter is fitted.

A exhaut and catalyst converter check every 20,000 km
The catalyst converter needs to be changed about every 100,000 km.

Detailed diagnostics at Kunio Auto
Our technicians are trained and test all aspects of your cars exhaust system and identify service items needing replacement.

The Warning Signs

  • There is a loud “roaring” coming from the car.
  • In the cabin there is a smell of exhaust fumes.
  • Your car is losing power.
  • The car’s Check Engine Light is illuminated.