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Introduction |
| Use this guide to replace a 2004 Acura MDX Exhaust Gas Recirculation (EGR) valve. | | | An EGR valve is the part of a car's engine that regulates the flow of exhaust gases to the engine's intake system. A failing EGR valve can result in an engine knock, an increase in harmful oxides of nitrogen (NOx), and poor engine performance. This affects the car's acceleration and reduces power, which could lead to serious damages to the engine or dangerous vehicle malfunctions. | | | Not all EGR valves need to be immediately replaced. Check your car's EGR valve for any corrosion, carbon build-up, or other damages before buying a new valve. Carbon build-up can be cleaned off of the EGR valve and the engine port, not requiring a replacement. | | | Before starting this guide, make sure that your car is off. The EGR valve connects to the battery and should not be removed while the car is powered. |
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