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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 damage 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 and in park. The EGR valve connects to the battery and should not be removed while the car is powered on.
Additionally, when using the carburetor cleaner in Step 6, ensure you are in a well-ventilated area, as it is toxic. Inhalation or prolonged exposure should be avoided.
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To find the EGR valve, look to the bottom-right of the engine.
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Press down on the clip of the harness connector and pull it away from the EGR valve to disconnect it.
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Use a 12 mm socket wrench to remove the nuts securing the EGR valve to the engine.
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Grab the top of the EGR valve and carefully pull it up to remove the original valve.
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Spray the engine's EGR valve port with carburetor cleaner.
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Wipe away any excess cleaner after spraying.
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Place the new EGR valve on the clean EGR valve engine port.
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Align the holes in the base of the EGR valve with the screws in the engine.
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With the 12 mm socket wrench, screw the nuts onto the new EGR valve to secure it in place.
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Plug the harness connector into the new EGR valve.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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