CCR Motor Company is to consolidate its eight Mitsubishi operations by concentrating sales through three main sites at Bristol, Cheltenham and Swindon.
The franchise has been removed at Cirencester, Melksham, Wokingham, Chertsey and Weston-super-Mare.
Tim Bagnall, managing director at CCR, said: "CCR have a long history with Mitsubishi and these commercial decisions have been made with their support.
“We had a couple of sites approaching the end of their property leases and this was an appropriate time to evaluate our position.
“By concentrating sales through three specific points in populous areas we will be able to better align the cost base with volume."
The site at Weston-super-Mare will be redeveloped in to a solus Renault/Dacia operation with Mitsubishi authorised repair.