But with Bayern virtually assured of progression after a 5-0 home win in the first leg, the highlight of the match was arguably a ginger cat briefly interrupting the action in the second half.
The German side went ahead through Thiago Alcantara in the 18th minute with the Spaniard volleying in a Thomas Mueller cross to kill off any lingering hopes of a miracle recovery by the Turkish team after Bayern had crushed them 5-0 in the first leg in Munich.
Referee Michael Oliver then had to briefly pause the game as a cat invaded the pitch.
Mustafa Pektemek forced a save from Sven Ulreich as Besiktas tried to level the game on the night, Bayern understandably lacking energy given their comfortable position.
For Bayern coach Jupp Heynckes, who replaced Carlo Ancelotti in October, this was his 11th straight win in the Champions League which set a new competition record.
Just a minute into the second half, Bayern finally scored their second when Franck Ribery released overlapping full-back Rafinha and defender Necip Uysal lunged at the cross but missed and the backtracking Gonul diverted it past goalkeeper Zengin.
James Rodriguez passed up a good opportunity to score Bayern's third in the 76th minute when he missed the post with a powerful strike, but the visitors did take a 3-1 lead in the 84th minute when Sandro Wagner converted from close range.
- Bayern Munich have now reached the Champions League quarter-finals for the seventh successive season. - The last time Bayern won at least six consecutive games in a single European campaign was back in the 1995-96 UEFA Cup, when they won seven on the bounce on the way to lifting the trophy.
"Besiktas hadn't lost here in the Champions League, so it wasn't easy".
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