Where is the egr valve on a 2004 Ford Focus?

The EGR valve location on a 2004 Ford Focus depends slightly on the engine. There are several engine options for that year. However, it's generally located on the back of the intake manifold, near the firewall (the partition between the engine compartment and the passenger compartment). It's often a relatively small, rectangular or cylindrical component with a vacuum line connected to it.

To be absolutely certain, you should:

* Consult your owner's manual: This is the most reliable source. It should have diagrams showing the location of major components.

* Use a reliable online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to select your year, make, model, and engine, and then view a detailed diagram showing the location of the EGR valve and other parts.

* Search online for a specific image: Search for "2004 Ford Focus EGR valve location [engine code]" replacing "[engine code]" with your engine code (this is usually found on a sticker on the engine itself or in your owner's manual).

Finding it visually can be tricky because it's usually nestled between other components. Be prepared to get a bit dirty and possibly use a flashlight. Remember to always disconnect the negative battery terminal before working on any engine components.