how to replace the spark plugs in Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

505 words

Problem Statement

Step-by-step guide to replacing spark plugs in Toyota Corolla E170 (2013-2019). Learn symptoms, diagnostic steps, and tools required for a successful repair.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the engine is completely cool before starting work.
•Disconnect the battery before working on electrical components.

Symptoms

•Engine misfire or rough idle
•Reduced fuel efficiency
•Difficulty starting the engine
•Check engine light illuminated
•Increased emissions

Diagnostic Steps

1
Scan the vehicle's onboard computer for error codes using an OBD-II scanner to confirm spark plug issues.
2
Inspect the current spark plugs for signs of wear, such as fouling, wear patterns, or corrosion.
3
Check ignition coils for proper function, as faulty coils can mimic spark plug issues.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Ratchet and socket
•Spark plug socket
•Torque wrench
•Anti-seize compound

Parts Required

•New spark plugs

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Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the engine is cool to prevent burns.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Remove Engine Cover

Tools Required: Socket set
Unscrew and remove the engine cover by locating and removing the bolts.
Carefully lift the cover off and set it aside.

3. Access Spark Plugs

Tools Required: Ratchet and socket
Locate the ignition coils above the spark plugs.
Disconnect the electrical connectors from each ignition coil.
Remove the bolts securing the ignition coils using the ratchet and socket.
Gently pull out each ignition coil to expose the spark plugs.

4. Remove Old Spark Plugs

Tools Required: Spark plug socket and ratchet
Use the spark plug socket to carefully remove each spark plug by turning it counterclockwise.
Inspect the removed spark plugs for wear or damage.

5. Install New Spark Plugs

Parts Required: New spark plugs (ensure they are the correct type as per manufacturer specifications)
Apply a small amount of anti-seize compound to the threads of the new spark plugs (optional).
Hand-tighten the new spark plugs into the cylinder head, then use the spark plug socket to tighten them to the manufacturer’s specified torque (typically around 13 lb-ft).

6. Reinstall Ignition Coils and Engine Cover

Reinsert each ignition coil into its respective position and secure them with their bolts.
Reconnect the electrical connectors to each ignition coil.
Place the engine cover back on and tighten the bolts to secure it.

7. Reconnect Battery

Reconnect the negative battery terminal.