The motoring show bowed out with less than two million viewers tuning in to see the finale.
An average of 1.9m viewers watched during the hour-long show, which aired from 8pm on BBC Two.
However, it had tough competition from ITV's coverage of France vs Iceland's Euro quarter final game.
'Top Gear' previously hit a 10-year low last month, when just 2.3m watched the episode that aired on 19 June.
Ratings then recovered slightly when 2.7m tuned in last week.
Chris Evans recently defended the show’s viewing figures, insisting that overnight figures “could not be less relevant” in the current climate of TV.
But he was singing a very different tune before the series returned, when he admitted he’d be “disappointed” if ‘Top Gear’ drew in fewer than five million viewers when it returned to screens, only for it's launch episode to draw 4.4m.
Recent reports claimed the show will undergo a reshuffle when the reboot enters its second series next year, bringing some of Chris' co-hosts to the forefront of the presenting line-up.
The newly-appointed Entertainment Controller at the BBC, Kate Phillips, reportedly wants more attention to be paid to Matt LeBlanc, as well as the other members of the team, who haven’t received as much airtime over the current series’ run.
Meanwhile, it was also claimed Matt has issued bosses with an ultimatum, telling them he would only return for a second series if Chris was axed.
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