The intake manifold runner control (IMRC) valve on a 2008 Dodge Avenger is
located on the intake manifold itself. It's not a readily accessible, stand-alone component. You'll likely need to remove some components (potentially the air intake system and possibly parts of the upper intake manifold) to see it clearly. Precise location varies slightly depending on the engine (2.4L or 2.7L), but it's always integrated into the intake manifold near the runners.
Because of the difficulty in accessing it, you should consult a repair manual specific to your 2008 Dodge Avenger's engine. A repair manual will provide diagrams and detailed instructions. Trying to locate it without one significantly increases the risk of damaging other parts.
