http://www.autozone.com/selectedZip,.../selectZip.htm
If that link doesn't work, here it is:
Part Number: 17014
Weight: 0.27 lbs.
Warranty: 1 YR
Application: Sensor located before catalytic converter
Note: O.E. type
5 wire, wideband
Pricing:
$50.99
As used on a 2002 VW Jetta 1.8T