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Bosch is the OE supplier to Porsche for oxygen sensors. Porsche just puts them in their box and resells them. So if you need one the Bosch part specified for your car should work just fine. Be aware many replace these sensors unnecessarily. If the code you are getting is the slow code just clear it and see if it comes back anytime soon as it is generated when x number of engine start-ups it takes over a specified period to warm up Y number of times. It does not mean your sensor is not working. If the code is for no signal and you have checked the wires and connector then it probably needs to be replaced. My 96 Carrera still has 3 of its 4 original sensors at 100K miles where over that period I had to clear the code three or four times.
Bosch is the OE supplier to Porsche for oxygen sensors. Porsche just puts them in their box and resells them. So if you need one the Bosch part specified for your car should work just fine. Be aware many replace these sensors unnecessarily. If the code you are getting is the slow code just clear it and see if it comes back anytime soon as it is generated when x number of engine start-ups it takes over a specified period to warm up Y number of times. It does not mean your sensor is not working. If the code is for no signal and you have checked the wires and connector then it probably needs to be replaced. My 96 Carrera still has 3 of its 4 original sensors at 100K miles where over that period I had to clear the code three or four times.
It trips you check engine light and you read the OBDC 4 digit code and look it up on the internet or if you use Durametric or other advanced readers it just tells you what the code means in plain language.
Bosch is the OE supplier to Porsche for oxygen sensors. Porsche just puts them in their box and resells them.
In the past (i can't say if the situation has changed in the last 5 years or so) the OE oxygen sensors have wire shielding that extends all the way (sealing) from the (end of the) sensor to the connector. The OEM Bosch aftermarket sensors do not.
Actually, a slow code will not affect performance or gas mileage as the sensor is working usually a few seconds later than the computer expects on a certain number of startups. If the sensor is dead as in no signal, there is a different code that indicates this that if present will effect engine performance.
In the past (i can't say if the situation has changed in the last 5 years or so) the OE oxygen sensors have wire shielding that extends all the way (sealing) from the (end of the) sensor to the connector. The OEM Bosch aftermarket sensors do not.
Your gas mileage will start to suffer.
Same thing prevails today and why we only use factory-sourced O2 sensors.
Actually, a slow code will not affect ... gas mileage as the sensor is working usually a few seconds later than the computer expects on a certain number of startups.
The O2 sensor only knows lean, rich and (and sorta/kinda) stoich, it doesn't really know how rich or how lean. And uses the rapid switching between the two states to achieve an average A/F ratio that is stoichiometric. As the sensor ages and contaminates build up, (resistance increases) causing the rise-time for the voltage (from the sensor) to increase and then rapidly drop off. That forces the average value to drop and makes the ECU think the mixture is lean. So it enrichens the mixture. That is why you always read of fuel mileage going down the toilet as the O2 sensor ages.
Not to mention the moment the ECU detects any type of O2 sensor error (ex. P0153/P0154) the signal output is ignored and the fuel scheduling defaults to "rich" for cooling purposes.
FWIW.......I don't know if I got lucky or what but the Ebay Bosch sensors I just received have heat shielding going all the way to both ends just like the originals.
FWIW.......I don't know if I got lucky or what but the Ebay Bosch sensors I just received have heat shielding going all the way to both ends just like the originals.
I originally bought a pair of the 13721's from another seller for a ridiculously low price (around $12 per) but the day after he replied that his supplier was out of stock. There were also cheap 13721's on Amazon but when I checked back they were also gone. The two above were the best prices I could find at the time......
It appears that the only difference in these two Bosch part numbers is the length of the wiring harness. Part #13721 has a 34.3 inch harness, while #13723 has a 28.3 inch harness. https://www.boschautoparts.com shows either part number as fitting the 1995 Carrera, so I'm assuming that the part with the longer harness will leave a lot of slack. Is #13723, with the shorter harness, actually the correct part for the 1995?
05-17-2017, 10:41 PM
Will those Oxygen Sensor fit ?
