[steve00s]

Originally Posted by RandallNeighbour

Don't buy them retail or you'll get your head ripped off at your ankles.

I found the cheapest source for Bosch sensors ($113.00)that have the correct plug on them here:

http://www.oxygensensors.com

Here's the direct link for the 2.5 motor's sensors that I bought:

http://www.automedicsupply.com/catalog.php?&engine=H6-2.5L

FWIW: Buy and replace all four at once unless you want a lot of future CE lights and really bad performance from your Boxster.

When I go to www.oxygensensors.com they say that the sensors are made by Walker. Is there a difference between Walker and Bosch? Am I not looking in the right place?