The Wrench Time

• Estimated Time: 45-60 Minutes
• Difficulty: 3/10 - Straightforward bolt-on procedure, but requires patience with brittle 2nd-Gen factory plastics and the delicate IAT sensor.

Tools You Will Need

• 10mm socket and ratchet (For the battery, factory airbox, and new heat shield)
• 8mm socket or nut driver (For factory throttle body clamps and new hose clamps)
• 13mm socket (For the V8 engine-mounted resonator bracket)
• Flathead screwdriver (For prying the crankcase breather clip)
• Silicone spray lubricant (Crucial for the factory sensor transfer)

Phase 1: Removing the Factory Part

1. Disconnect the Battery: Always start by disconnecting the negative battery terminal using a 10mm wrench or 10mm socket. This prevents accidental shorts and clears the ECU memory for the new 2004-2010 Dodge Durango 3.7L 4.7L 5.7L intake volume.
2. Unplug the IAT Sensor: Locate the IAT sensor plugged into the side of the factory intake tube or resonator box. Depress the plastic locking tab and slide the harness connector off. Tuck the wiring aside so it does not get pinched.
3. Loosen the Throttle Body Clamp: Take your 8mm socket and loosen the factory worm-gear clamp securing the intake tube to the throttle body. Break it loose, but there is no need to remove the clamp entirely.
4. Remove the Resonator and Airbox: Remove the mounting bolts securing the factory resonator hat and lower airbox housing using a 10mm socket. On V8 models, use a 13mm socket to remove the bolt holding the resonator bracket to the engine block. Disconnect the crankcase breather hose from the airbox using a flathead screwdriver to carefully pry the retaining clip.
5. Extract the Factory Assembly: Firmly grab the factory airbox and resonator assembly. Pull straight up to pop the lower airbox off its rubber mounting grommets, and lift the entire bulky unit out of the engine bay.

Phase 2: Installing the Cold Air Intake for Dodge Durango (2004-2010) 3.7L 4.7L 5.7L Engines

1. Prep the Heat Shield: Assemble your aftermarket cold air intake heat shield. Drop it into the factory lower airbox location, aligning it with the factory mounting holes. Secure it down using the provided hardware and your 10mm socket.
2. Transfer the IAT Sensor: Push the newly supplied rubber grommet into the pre-drilled hole on the new intake tube. Apply a tiny drop of silicone spray to the inside of the grommet. Gently press your factory IAT sensor into the grommet until fully seated. Handle it delicately to avoid cracking the thermistor.
3. Mount the Throttle Body Coupler: Slide the provided silicone step-down coupler onto the throttle body. Slip the provided clamps over the coupler and tighten the throttle body side snugly using an 8mm nut driver. Leave the intake-tube side clamp loose for adjustments.
4. Install the Intake Tube and Filter: Guide the new Cold Air Intake tube through the heat shield and slide it into the throttle body coupler. Attach the new high-flow air filter to the end of the tube inside the heat shield and tighten the filter clamp with your 8mm socket. Connect the provided crankcase breather hose from the engine block to the welded nipple on the new intake tube. Plug the factory wiring harness back into the IAT sensor.
5. The ECU Relearn Startup: Reconnect the negative battery terminal with your 10mm wrench and tighten it down. Turn the key and start the engine. Do not touch the gas pedal for at least 20 seconds. Let the vehicle idle so the Dodge ECU can adjust its fuel trims to the massive increase in airflow and the new IAT sensor location without throwing a check engine light.

Disclaimer: This is a general guide provided for the 2004-2010 Dodge Durango 3.7L 4.7L 5.7L. Always refer to your factory service manual for exact torque specifications and safety procedures.