🔧 Charger - Air Metering Sensor Replacement (MAF vs MAP)

Your Charger’s 5.7L HEMI does not use a traditional MAF sensor (Mass Air Flow) in the intake tube like many other cars. From the factory it uses a MAP sensor (Manifold Absolute Pressure) on the intake manifold (and an IAT sensor for air temp).

Difficulty Level: Beginner | Estimated Time: 0.3-0.8 hours

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⚠️ Safety & Precautions

• 🧤 Work on a cool engine; the intake area gets hot.
• 🔌 Turn ignition fully OFF and keep the key/fob away from the car while unplugging sensors.
• ⚡ If you disconnect the battery, use a 10mm socket and remove the negative cable first.
• 🛑 Don’t pull on wires; press the connector lock and pull on the plug body.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" drive ratchet
• 6" extension (1/4" drive)
• Torx T25 bit socket
• Small flathead screwdriver
• Flashlight
• Inch-pound torque wrench (20–200 in-lb)
• Nitrile gloves
• Safety glasses
• OBD2 scan tool

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• MAP sensor - Qty: 1
• MAP sensor O-ring (if not included) - Qty: 1
• IAT sensor (intake air temperature) (only if replacing IAT instead of MAP) - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open the hood and use a flashlight to locate the sensor before removing anything.
• If you’re not sure which one you mean: the MAP sensor sits on the intake manifold; the IAT sensor is usually on/near the air inlet tube.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Identify which “air sensor” you’re replacing

• Use a flashlight to look for a small sensor on the intake manifold held by Torx screws (that’s typically the MAP sensor).
• If you instead see a sensor pushed into the intake tube/air duct with a clip or twist-lock, that’s typically the IAT sensor.
• Tip: MAP is on the manifold, not the air box.

Step 2: Power down (recommended)

• Make sure the ignition is OFF.
• Optional but beginner-friendly: disconnect the negative battery cable using a 10mm socket and 1/4" drive ratchet.

Step 3A: Replace the MAP sensor (most common “MAF” mix-up)

• Locate the MAP sensor on the intake manifold.
• Release the electrical connector:
  • Use a small flathead screwdriver only if needed to gently lift the lock tab, then pull the connector straight off.
• Remove the MAP mounting screw(s) using a Torx T25 bit socket with a 1/4" drive ratchet and 6" extension.
• Pull the sensor straight out. If it feels stuck, wiggle gently—don’t pry hard on plastic.
• Check the O-ring on the sensor:
  • If the new sensor doesn’t come with one, install a new MAP sensor O-ring.
• Install the new MAP sensor straight in, then start the screw by hand.
• Tighten with an inch-pound torque wrench: Torque to 44 in-lb (5 Nm).
• Reconnect the electrical connector until it clicks.

Step 3B: Replace the IAT sensor (if that’s the one you meant)

• Locate the IAT sensor in/near the intake tube.
• Unplug the connector by pressing the tab and pulling straight back (use nitrile gloves for grip).
• Remove the sensor:
  • If it’s twist-lock: rotate it by hand and pull out.
  • If it’s retained by a small screw: remove it using a Torx T25 bit socket and 1/4" drive ratchet.
• Install the new IAT sensor fully seated, then reconnect the plug until it clicks.

Step 4: Restore power and clear codes (if needed)

• If disconnected, reconnect the negative battery cable using a 10mm socket.
• Plug in an OBD2 scan tool and clear any stored sensor codes.

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✅ After Repair

• Start the engine and let it idle for 1–2 minutes. It should idle smooth.
• Use an OBD2 scan tool to confirm no codes return and check live data for MAP/IAT readings.
• Take a 10-minute test drive and re-check for a check engine light.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 (parts + labor)

DIY Cost: $40-$120 (parts only)

You Save: $140-$230 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.