Subaru and Isuzu dealerships are the latest to join the Motor Codes scheme on servicing and repair standards.
The service and repair code is designed to help motorists identify responsible garages, and offers a structured complaints procedure.
More than 6500 garages are in the scheme, which also provides a free advice line and a dispute resolution service.
Paul Tunnicliffe, managing director of IM Group, which is the UK importer of Subarus and Isuzus, said: 'This is an important move for both of our brands. Our collaboration with Motor Codes means that Subaru and Isuzu drivers using our dealers can be surer than ever that their cars are in safe hands, throughout the lifespan of the vehicle.'
You can find garages that have joined the scheme on the motorcodes.co.uk website.