Keep smooth throttle response and accurate fuel and timing control with the Standard Ignition Throttle Position Sensor (MPN TH389). It serves as a direct-fit replacement for the 1999-2004 Subaru Forester (H4-2.5L), 1999-2005 Subaru Impreza (H4-2.5L), 2003-2006 Subaru Baja (H4-2.5L), 2000-2004 Subaru Outback (H4-2.5L), and the Subaru Legacy (1998-1999 H4-2.2L and 2000-2004 H4-2.5L).
A throttle position sensor reads the angle of the throttle plate and sends that signal to the engine control module so it can adjust fuel delivery and timing to match how far the throttle is opened.
Diagnose the underlying cause before replacing, since these symptoms can have other sources. Manufacturer part number TH389.
What vehicles does the TH389 fit?
It fits the 1999-2004 Subaru Forester, 1999-2005 Impreza, 2003-2006 Baja, 2000-2004 Outback (all H4-2.5L), and the Legacy (1998-1999 H4-2.2L, 2000-2004 H4-2.5L). See the Buyer's Guide tab for details.
What does a throttle position sensor do?
It measures the angle of the throttle plate and sends that signal to the engine control module, which uses it to adjust fuel delivery and timing to the throttle opening.
What are the signs of a bad throttle position sensor?
Common signs include hesitation, surging, rough or erratic idle, poor acceleration, or a stored throttle-position code. Diagnose the cause before replacing, since other issues can produce these symptoms.
Is this a direct-fit replacement?
Yes. The TH389 is a direct-fit replacement for the listed Subaru applications.
How many sensors do I need?
The listed applications use one throttle position sensor. This listing is for one sensor.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
