Ancaster Nissan - part of the Ancaster Group – has bought the Dover Road, Slough dealership from WLMG (West London Motor Group).
The dealership’s 23 staff will join a team of more than 200 Ancaster employees working across the group's seven other sites.
The group, which was founded in 1949, has been with Nissan since it launched in the UK as Datsun in the 1970s and now operates Nissan franchises in Bromley, Eltham, Penge, South Croydon.
The acquisition of WLMG Slough - Ancaster Group's fifth Nissan franchise - makes the group the second largest Nissan retailer in the South East.
Two of Ancaster's sites have recently undergone major redevelopments to install Nissan's new customer-focused retail concept and a similar redevelopment of the new Slough site will take place soon.
The group's managing director Stephen Wood is the serving chair of Nissan Motor (GB)’s dealer association.
He said: "We are delighted to have added such a prominent and successful site to our growing portfolio of Nissan sites across London and the South East."
"Our partnership with Nissan is hugely important to the group and we have great faith that the brand will continue to grow its market share in the UK in the years to come.
"This new outlet gives us a foothold in West London and along the M4 corridor and we believe our deep-rooted commitment to offering outstanding customer service, coupled with Nissan's fantastic product range, will make it a huge success."