Mitsubishi catalytic converter replacement, made easy

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How much does a catalytic converter replacement cost for Mitsubishi cars?

A typical Mitsubishi catalytic converter replacement in the UK costs around £219 - £344. Depending on your Mitsubishi model and engine, and whether you live in a big city or a small one, the price of a catalytic converter replacement on your vehicle can be higher or lower. We computed prices for some of the best-selling Mitsubishi cars in the UK in order to give you an idea of how much a catalytic converter replacement costs.
Car modelFixter price range
Catalytic converter replacement for Mitsubishi Eclipse£219 - £344

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Our expert insights into catalytic converter replacement

What does a catalytic converter do?

A catalytic converter is an essential part of your exhaust system. Its job is to change harmful substances in a car’s exhaust gasses, such as carbon monoxide nitric oxide, and hydrocarbons, into less harmful gases.

What are the symptoms of a failing catalytic converter?

Below are the top three symptoms that could indicate you need to replace your catalytic converter:

  • The smoke from your exhaust is heavier or darker than normal.

  • You smell something similar to rotten eggs or sulphur coming from your car’s exhaust.

  • You notice a reduction in engine performance.

What happens during a catalytic converter replacement?

Our certified mechanics will:

  • Raise your car completely off the ground, making sure that the exhaust has had time to cool down before they begin the replacement.

  • Locate the catalytic converter. It usually looks like a box in the middle of the exhaust system underneath the car.

  • Remove the catalytic converter, inspect it and fit a replacement if necessary

  • Test the new catalytic converter, taking care to double check that the replacement catalytic converter is up to the correct specifications for the vehicle’s emissions standards.

Daniel, from LondonDaniel, from London

Hey Fixter, can I drive with a broken or missing catalytic converter?

Your car will be drivable, however bad catalytic converters are terrible for the environment and can cause further damage to your car. If you get caught with a broken catalytic converter you may be fined by the police.

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Want to learn more about Mitsubishi catalytic converter replacement?

What does a catalytic converter do?

A catalytic converter is a key component of your exhaust system. It changes harmful substances in a car’s exhaust gasses, such as carbon monoxide nitric oxide, and hydrocarbons, into less harmful gases, such as water vapour. Every car registered in the UK must have a catalytic converter fitted by law. It became standard for petrol vehicles in 1992, and 2001 for diesel cars.

A typical catalytic converter is made of ceramic blocks with a porous structure. By coating the pores with a selection of valuable metals: platinum, rhodium and palladium, they act as a filter to break down the toxic exhaust gases produced by burning petrol.

The metal coatings work far better as filters when they’re heated, so their position next to the engine offers the ideal environment for just that. The converter can then perform the chemical reaction required to break down the poisonous gasses into less harmful products with much greater ease.

Mitsubishi

Mitsubishi Motors Corporation is a Japanese multinational automotive manufacturer.

It is part of the Renault–Nissan–Mitsubishi Alliance but has had connections with many other vehicle manufacturers throughout its history—as shareholders, part owners, and suppliers of parts and components.

Mitsubishi celebrated 100 years of automotive manufacturing in 2017 and has created a solid position for itself in the UK market with around 350k vehicles on the roads today.

Making a mark in an SUV orientated market

The selection of Mitsubishi models does feature the Mirage hatchback and the L200 pickup, but the rest of the range is predominantly SUVs. Even the Mirage has strong SUV overtones.

And why not? They’re sturdy, versatile and roomy enough for families of all sizes, and the Outlander PHEV is perfect for company car drivers with its low fuel bills and plenty of interior space.

Outlander PHEV: The world’s first plug-in hybrid SUV

In 2013 Mitsubishi introduced the world’s first plug-in hybrid SUV. As a company that continues to make significant breakthroughs in driving technology, their work with renewable fuel types is establishing them as a leader in ecological systems.

The Mitsubishi Shogun: the beginnings of the SUV generation

The roots of the Shogun can be traced as far back as 1934 with a prototype for the Japanese Government, but it wasn’t until the Tokyo Motor Show in 1973 that Mitsubishi presented their first commercial prototype.

The Shogun was launched in 1982, and along with other 4x4 originals: predominantly by Land Rover, Jeep and the Toyota Land Cruiser, it helped boost the popularity of rugged go-anywhere motoring into the mainstream.

How often should a catalytic converter need replacing?

A catalytic converter will usually need to be replaced after 70,000-100,000 miles, or if you begin to experience any of the above symptoms. Regular maintenance and checks (including an MOT) will determine whether you need to replace your converter or if it’s good to go for a few more miles.

How you drive, and the typical usage of your car, will affect its lifespan too. Your converter could wear out quicker if your car is predominantly used for short journeys in stop/start traffic. Your converter works better at a required temperature, so if it’s not getting the chance to heat up properly, it isn’t going to be as efficient. This could shorten its effective life.

The law, vehicle regulations and your MOT

Your vehicle’s emissions will be measured during your MOT test. If your car is found to break the legal limits, then that’s an immediate fail.

In 2020, almost 1.3 million vehicles failed their MOT test last year due to dangerously high emissions. If you’re trying to keep your motoring costs down, then MOT retests are easily avoidable with regular checks and good car maintenance.

What happens during a catalytic converter replacement?

Our certified mechanics will:

  • Raise your car completely off the ground, making sure that the exhaust has had time to cool down before they begin the replacement.

  • Locate the catalytic converter. It usually looks like a box in the middle of the exhaust system underneath the car.

  • Remove the catalytic converter, inspect it and fit a replacement if necessary

  • Test the new catalytic converter, taking care to double check that the replacement catalytic converter is up to the correct specifications for the vehicle’s emissions standards.

What causes a catalytic converter to break?

Most catalytic converters will last the lifetime of a vehicle. But in some cases, a converter will go bad and need to be replaced. Almost all problems with a catalytic converter are due to an engine issue. It is usually caused by excess fuel entering the exhaust system due to an incorrect air/fuel mixture, failing spark plugs, incorrect engine timing, a faulty oxygen sensor, or other issues where fuel leaves the engine’s combustion chamber unburned.

When this happens, the catalytic converter gets too hot and begins to melt, causing significant performance problems. Without proper maintenance, carbon deposits can also clog the catalytic converter, or worst case, block it completely.

When should a catalytic converter be replaced?

The expected lifespan of a catalytic converter is usually between 70,000 and 100,000 miles. Regular maintenance and checks (including an MOT) will determine whether you need to replace your converter or if it’s good to go for a few more miles.

How you drive, and the typical usage of your car, will affect its lifespan too. Your converter could wear out quicker if your car is predominantly used for short journeys in stop/start traffic. Your converter works better at a required temperature, so if it’s not getting the chance to heat up properly, it isn’t going to be as efficient. This could shorten its effective life.

What are the symptoms of a bad catalytic converter?

Usually, there a few signs you can look for:

  • Significantly reduced engine performance.

  • Dark smoke is coming from the exhaust.

  • Poor fuel efficiency.

  • If you experience issues while accelerating.

  • If you can smell sulfur (rotten eggs) coming from your car.

  • When the ‘check engine’ warning light illuminates.

How often should you replace your catalytic converter?

A catalytic converter will usually need to be replaced after 70,000-100,000 miles, or if you begin to experience any of the above symptoms. Regular maintenance and checks (including an MOT) will determine whether you need to replace your converter or if it’s good to go for a few more miles.

How you drive, and the typical usage of your car, will affect its lifespan too. Your converter could wear out quicker if your car is predominantly used for short journeys in stop/start traffic. Your converter works better at a required temperature, so if it’s not getting the chance to heat up properly, it isn’t going to be as efficient. This could shorten its effective life.

What happens during a catalytic converter replacement?

Our certified mechanics will:

  • Raise your car completely off the ground, making sure that the exhaust has had time to cool down before they begin the replacement.

  • Locate the catalytic converter. It usually looks like a box in the middle of the exhaust system underneath the car.

  • Remove the catalytic converter, inspect it and fit a replacement if necessary

  • Test the new catalytic converter, taking care to double check that the replacement catalytic converter is up to the correct specifications for the vehicle’s emissions standards.

What is the average life of a catalytic converter?

This can vary from car to car and from driver to driver, however the estimated lifespan of a catalytic converter is between 70,000-100,000 miles, or if you begin to experience any of the symptoms previously mentioned.

Can you drive with a broken or missing catalytic converter?

Your car will most likely still be drivable, however bad catalytic converters are terrible for the environment, and driving without one is even worse. A blocked or damaged converter can cause further damage to your car, resulting in a more expensive repair in the long run.

There are strict regulations and laws around vehicle emissions, therefore if you get caught by the police with a broken or missing catalytic converter you may be fined.

What happens if you don't change a broken catalytic converter?

Failing to replace a catalytic converter can result in more damage to your car, poor fuel efficiency and a potential fine from the police. If the converter has begun to function poorly due to it being clogged up, it will cause the vehicle to run extremely poorly.

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