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What has happened?

Nissan and Renault entered a strategic alliance in 1999 (the ‘Alliance’). Together, the Alliance is said to sell more than 1 in 9 vehicles worldwide. It is estimated that through the Alliance, Nissan and Renault vehicles share 85% of their engines in some way, making it likely that emissions breaches will be common to both Nissan and Renault. An independent report by Transport and Environment found Nissan and Renault to be among the worst performers in respect of both Euro 5 and 6 engines.

In 2016, Renault announced that it intended to recall more than 15,000 vehicles and to modify up 700,000 more to make sure that its engines conformed with emissions standards. Renault is now subject to a French criminal investigation in respect of emissions irregularities.

In respect of some models Renault admits turning off or reducing the emissions control systems and contends that this is lawful being a “protection measures due to sootiness and lacquer formation of the Engine Gas Recirculation components, as well as the icing-up of the engine air path and the sooting of engine oil”. However, a CJEU judgment has confirmed that such justifications will not amount to lawful defeat devices under the regulations.

Read about the judgment here.

In response to allegations Nissan has requested that a statement was published on our website. You can read that statement here.

Click here to read further about emissions claims.

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The scandal in numbers


Renault vehicles to be recalled throughout Europe


Worldwide vehicle sales undertaken by Nissan-Renault Alliance


Vehicles sold by the Nissan-Renault Alliance in Europe from 2009 to 2019


Excess deaths a year attributable to air pollution in the UK

exhaust smoking

Can I join?

It is likely that the following models are affected:

Nissan Juke
Nissan Note
Nissan Qashqai
Nissan X Trail
Renault Captur
Renault Clio
Renault Espace
Renault Kadjar
Renault Master
Renault Megane
Renault Scenic

In addition to the above models, anybody who bought a Euro 5 or Euro 6 Nissan or Renault vehicle manufactured between 2009 and 2018 in England or Wales may be eligible to join the claim. If you bought or leased an affected Nissan or Renault vehicle in Scotland or Northern Ireland, you can still join a claim, but it will be handled slightly differently.

The litigation will be free at the point of use. Harcus Parker will act on a no-win, no-fee basis, and will pay any third-party costs which are necessary in order to progress the claims to trial.


NOx contains both Nitrogen Oxide and Nitrogen Dioxide. NOx is emitted when fossil fuels are burnt, but not completely combusted. Diesel engines are not 100% efficient, meaning that their exhaust emissions contain NOx, as well as greenhouse gases such as carbon dioxide and carbon monoxide, and air pollutants such as particulate matter. NOx worsens air quality and has adverse health effects including contributing to respiratory problems and cancer. Diesel cars are one of the main causes of pollution in our air.

These allow cars to turn down their emissions control system outside the emissions testing environment i.e. when the cars are driven in the real world. Not all defeat devices are cheating devices – some are allowed by regulations. However, in many cases they are used by manufacturers to give the appearance that their diesel vehicles pass emissions tests, when in fact they do not.

The term used to describe the emissions scandal which broke when the German car maker, VW, admitted to fitting more than 11 million of their VW cars with unlawful defeat devices leading to the first major emissions class action lawsuit in the United States.

We use this term to cover both owners of cars, and people who leased their cars.

A senior court of England and Wales dealing with high value and high importance non-criminal matters. This court ruled that it will be bound by findings of the KBA (the German motor authority) that defeat devices are present.