The phrase "same dealership" refers to a business or place where you can buy or service vehicles, which is owned or operated by the same company or organization. Full definition
While there was no love or romance involved, I found out that both of our cars were being serviced at the same dealership on the same day. (huffingtonpost.com)
Almost a year later in having my vehicle serviced at the same dealership the staff treats me the same way, nothings changed. (cars.com)
I went trade in a previous vehicle that I bought from this same dealership. (cars.com)