Bosch Oxygen Sensors New Part Numbers
 

This is from Bosch's 2009 Oxygen Sensor Catalogue. It quotes OEM part number in one column with the appropriate universal unit next to it.
The part numbers have changed - no idea how long it will take for the new numbers to filter down to auto part store levels.
ftp://arakis.gotdns.com/Downloads/Bosch%20Oxgen%20Sensor%20Porsche%20OEM%20&%20Unive rsal.pdf

Last time I replaced my O2 sensor, in July 2008, I purchased a Bosch #13942 oxygen sensor from NAPA for $43.99 + tax, and spliced the wires into my 968's connector, using solder and heat-shrink tubing. I kept the wires exactly the same length as the OEM so as to avoid significant changes to the overall electrical resistance.

The O2 sensor #13942 is for a 1987-1988 Ford Mustang V8. The sensor itself is identical to the Bosch #13011 that NAPA sells for $139.00 + tax; this speaks volumes about what we pay for Porsche's proprietary connectors!

You must be fortunate to have the O2 sensor working after you used solder and heat-shrink tubing. I have never seen anyone advising using solder.

O2 sensors are to be crimped only.

From FR Wilk== http://www.the944.com/
Do Not Solder Wires!
Use wire crimps or Posi-LockÒ. All the latest BOSCH O2 sensors are air tight. But the O2 sensor must have a clean air supply to work. It breaths down the center of the multi-stranded wire(s). Solder and solder flux will close the air-gaps between the strands of wire and the O2 sensor may malfunction.

From NGK:

Tech info - Oxygen Sensors Overview

John_AZ

"You must be fortunate to have the O2 sensor working after you used solder and heat-shrink tubing. I have never seen anyone advising using solder."

Well, I did, and would advise anyone to do the same. It's a secure connection in a high-temp environment. Electric current didn't seem to mind.

People have said that a Ford Taurus oxygen sensor works in our cars, but dont know the model. I think 924board has a page where they have alternative part #'s for our cars.

Link from fr wilk:
Oxygen Sensor

John_AZ