Hi,
the video shows a step-by-step tutotial for changing the spark plugs on the Peugeot 206 with the 1.4l TU3 JP engine. The replacement interval is 60,000 km.
https://www.youtube.com/watch?v=KlKhrAowdYY
The video has a German soundtrack, but English subtitles are available on YouTube.
Enjoy it,
Jürgen