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I have had a problem with the sensor on bank 1 after the cat for 8 years. If you include the original sensor, I am on my 4th Bosch sensor. The other 3 sensors are original on my 1997.
Either I have had 4 bad sensors or I have a bad cat. Have not had the time to rule out one or the other.
I think it is just another bad sensor. This time I bought a Walker sensor from ebay for about $110. No more Bosch for me. Walker does not make a universal one for the Boxster. My Walker has the same connector as the Bosch units.
Have not had time to put in the Walker, so I have no report.
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