The speed sensor in a Peugeot 308 with automatic transmission is usually located in the following places:
*Transmission Differential Housing: The sensor may be installed in the transmission differential housing, near the output shaft.
*On the transmission output shaft: The sensor can be installed directly on the transmission output shaft.
*In the speedometer drive: The sensor may be located in the speedometer drive, which connects the transmission to the speedometer on the instrument panel.
* On the automatic transmission control unit: On some models, the speed sensor can be integrated into the automatic transmission control unit.
To more accurately determine the location of the speed sensor in your specific vehicle, it is recommended that you consult your repair manual or consult a qualified mechanic.