Generic O2 Sensors- does Audi interchange w/ Saab?? [Audi related]

[Brett Dikeman]

At 1:29 PM -0800 4/2/02, George Siambis wrote:

>The 'universal' sensor from TPC is Bosch #13913, and, according to TPC, is
>not a true "universal" but has the connectors for  particular F0rd cars
>(thus the price diff?)

Yup.  4 wire sensors can be used too, the fourth wire is for signal
ground and should probably be grounded to the engine ground.  A 3
wire could be used in a pinch for a 1 wire car, too.  If you wanted
to reduce emissions on a cold start, you could wire up a 3-wire
sensor's heater circuit to some ignition-on-only circuit.

There are some variations in sensors...some use the cable jacket as a
sort of sniffer pipe for a reference...usually done on O2 sensors
down low to the ground(where they might get splashed etc) like
pre/post catalytic converter sensors.  A few cars use very wide range
sensors which aren't compatible...some recent Hondas and Toyotas, I
think.

Brett
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