Retrofit Vehicle Solutions

Retrofit technologies can make vehicles cleaner to run and ensure compliance with the Clean Air Zone

Vehicles that are not compliant with the Clean Air Zone (CAZ) can be made compliant by retrofitting technologies that reduce harmful emissions. The Clean Vehicle Retrofit Accreditation Scheme (CVRAS) certifies manufacturers of retrofit technologies. Vehicles fitted with a CVRAS approved retrofit solution will gain CAZ compliance and will not have to pay to enter a CAZ in Birmingham or any other UK city. 

Vehicles that are not compliant with the Clean Air Zone (CAZ) can be made compliant by retrofitting technologies that reduce harmful emissions.

The key retrofit technologies are:

Exhaust after treatment systems – these use a diesel particulate filter (DPF) to reduce emissions of particulate matter and a selective catalytic reduction (SCR) system which reduces nitrogen oxide emissions. They are applied to an existing vehicle powertrain.
Re-power systems – this involves completely stripping out the existing engine and replacing it with a brand-new powertrain which could be a cleaner diesel engine, a petrol engine + LPG system, a 100% electric powertrain or a hybrid electric powertrain.

CVRAS approved technologies exist for buses, coaches, refuse collection vehicles and Hackney carriages. Solutions for trucks are expected before end 2019. A summary of available technologies is provided below. You can see more details on the technologies and the companies that offer them on the Business Breathes resources page or on the CVRAS webpage.   
Vehicle
Retrofit technology
Retrofit companies
Technology CVRAS approval status
Applicable models

Hackney carriage taxi

Re-power and LPG conversion

Vehicle Repowering Solutions Ltd

Approved

TX1, TX2 and TX4

Exhaust after-treatment system

HJS UK Ltd

In Progress

TX4

Coach

Exhaust after-treatment system

Eminox Ltd

HJS UK Ltd

Approved

In progress

Volvo B9R with D9B 9.4 litre Euro 5

Mercedes Setra 416, Volvo B11 and B13

Bus

Exhaust after-treatment system

Eminox Ltd

Amminex Emissions Technology A/S

HJS UK Ltd

Baumot UK Ltd

Excalibre Technologies Ltd

Approved

Approved

Approved

Approved

Approved

Approved

Several models – see full list in resources

Diesel Euro VI re-power

Cummins Engine Company Ltd

In Progress

To be advised

Electric re-power

Magnetic Systems Technology Ltd

In Progress

Several models – see full list in resources

Refuse Collection Vehicle

Exhaust after-treatment system

Eminox Ltd

Amminex Emissions Technology A/S

Approved

Approved

Dennis Eagle Elite with Volvo D7C 7 Litre Euro V

Mercedes-Benz Econic 6.3 litre Euro V

Electric re-power

Magnetic Systems Technology Ltd

In progress

To be advised

HGV

Electric re-power

Magnetic Systems Technology Ltd

In progress

To be advised

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