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From The Saab Tech Wiki
Engine coolant circulates through a section of the throttle body by way of two hoses connected to the engine, to help prevent freeze up during winter. Fig. 4
[[File:90093_TB_2.jpg|thumb|Fig. 4 - Coolant Connections]]
===Throttle Position Sensor===
The vacuum lines are connected into two chambers at the bottom of the throttle body, which open into the intake manifold. Also note groove for the gasket between the throttle body and the manifold. Fig. 8
[[File:90093_TB_7.jpg|thumb|Fig. 8 - Throttle Body Bottom View]]
==Cleaning and Lubrication==
The inside of the throttle body may need cleaning every few years around the throttle plate. The throttle arm springs and bushing can stick and may require lubrication, and the throttle position sensor (TPS) can wear out. The tar around the circumference of the throttle plate is from the same source as the IAC valve contamination. Fig. 5
[[File:90093_TB_6.jpg|thumb|Fig. 5 - Throttle Body Cleaning]]
==Part Numbers==
