Manufacturer: Schrader
Manufacturer part number: 28203
Frequency: 315 mhz
OEM part number (s) Coverage: 28103SA002, 28103SA001, 28103AG01C, 28103AG01B, 28103AG01A
TPMS Relearn Website: http://www.tpmsrelearn.com/2016/12/05/subaru/
The TPMS sensor that is used in 2008-2016 Subaru Forester is the Schrader 28203. The valve stem is black and made out of rubber.
The valve stem can be removed from the sensor body and replaced with another rubber valve stem.
Schrader 28203 fits the following Subaru models: 2008-2016 Impreza, 2008-2016 Legacy, 2008-2016 Outback, 2008-2014 Tribeca, 2013-2016 WRX, 2013-2016 XV Crosstrek
You can purchase the sensor (s) here: https://www.tpms.com/28203_Schrader_TPMS_Sensor_28103SA002_28103AG01C_p/28203.htm