Sometimes, you will need to source particular parts for your specific vehicle. If something has gone wrong with the engine or with the mechanics, chances are only a branded part will do the job. You will need to find a garage that is approved to carry out work on your specific brand of car in this case, for example, Ford, Skoda or Citroen.
If you have purchased a car on finance, check your contract carefully. It will often specify that any work has to be carried out in an approved garage for your make and model of vehicle. Even if it is not something important like an engine part, you could be charged for it if you choose to hand the car back, because you haven’t stuck to your contract. This may mean that the work will cost more money, as approved garages can charge higher prices for parts and labour.