Hella Pagid 355251421 Disc Brake Pad Wear Sensor. Fits what vehicles: 2005-2008 Porsche Boxster, 2006-2008 Porsche Cayman. Disc Brake Pad Wear Sensor. Location: Front LeftDisc Brake Pad Wear Sensor. Occasionally, there may be an issue with your item or your order and we will do our best to ensure you are 100% satisfied.