on December 7, 2010, 6:10 am, in reply to "Re: Ford mondeo 2.0tdci hesitation 2500 rpm"
The small "pip" on the end of the sensor will only be on a new one. Once it has been fitted, the pip wears away. If you install a used one, then slide it in all the way & then just pull it back a Natts wotsit, you should be good.
Scope it if you have any doubts.