🔧 Oxygen Sensor - Replacement

Your Accord uses multiple oxygen sensors, so the exact location matters: upstream sensors are near the exhaust manifolds, and downstream sensors are farther back in the exhaust. This procedure covers the general replacement process for one sensor, with the same basic steps for each one.

Difficulty Level: Intermediate | Estimated Time: 1-2 hours

---

⚠️ Safety & Precautions

• Let the exhaust cool completely before touching anything underneath the car.
• Use jack stands if you lift the vehicle. Never work under a car supported only by a jack.
• Do not pull on the wire. The connector and harness are more delicate than they look.
• Keep the new sensor tip clean. Oil, grease, and dirt can shorten its life.
• Battery disconnect is not required for this job.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Oxygen sensor socket, 22mm
• 3/8-inch ratchet
• 3/8-inch breaker bar
• 6-inch extension bar
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Penetrating oil
• Torque wrench, 3/8-inch drive
• Trim clip tool

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Oxygen sensor - Qty: 1

---

📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the exhaust cool fully.
• If the sensor is under the car, raise and support the vehicle safely.
• Soak rusty threads before removal.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the sensor

• Find the oxygen sensor you are replacing on the exhaust.
• Trace the wire and connector so you know where it routes before removal.

Step 2: Unplug the sensor

• Use your hands and a trim clip tool if needed to release the connector lock.
• Unclip the harness from the factory retainers so the sensor can turn freely.
• Do not twist the wire.

Step 3: Remove the old sensor

• Spray penetrating oil on the threads if rust is present.
• Use a 22mm oxygen sensor socket with a 3/8-inch ratchet or breaker bar to loosen the sensor.
• Add the 6-inch extension bar if access is tight.
• Remove the sensor from the exhaust.

Step 4: Install the new sensor

• Compare the old and new sensor before installation.
• Thread the new sensor in by hand first to avoid cross-threading.
• Use the 22mm oxygen sensor socket to tighten it.
• Torque to 44 Nm (32 ft-lbs).

Step 5: Reconnect the wiring

• Plug the connector back in until it clicks.
• Route the harness back into every clip and holder.
• Keep the wire away from the exhaust pipe and heat shields.

Step 6: Test the repair

• Lower the vehicle if it was raised.
• Start the engine and check for exhaust leaks or warning lights.
• Verify the harness is secure and not touching hot parts.

---

✅ After Repair

• Clear the check engine light with a scan tool if needed.
• Drive the vehicle and confirm the light does not return.
• Recheck the wiring after a short test drive.

---

💰 DIY vs Shop Cost

Shop Cost: $250-$650 (parts + labor)

DIY Cost: $80-$220 (parts only)

You Save: $170-$430 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.5 hours.

---

🎯 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.