As the van skids to turn around, the driver side back door (right side) swings shut and latches (audibly and visually). Second view shows the same. Third view is a close up of the driver side front window and same back door already latched still swinging open. Fourth view shows passenger side back door swinging shut and driver side back door already latched as first shown. It's not a flip shot as steering wheel is shown in last 3 views.
When Slater gets home, he locks his cars with the remote and there a double cheep sound. This is common in American models but British and Irish cars don't make that sound. However, people are used to hearing this in American productions, so that inaccurate sound effect has become a common trope in British TV shows.