Do All Four Ignition Coils Need to Be Replaced Together?

[DePeter]

Whether to replace all four ignition coils depends on their specific usage conditions. If only one or two ignition coils have failed while the others remain unaffected and are still in good condition with a lifespan under 100,000 kilometers, you can simply replace the faulty ones without needing to replace all four. However, if the ignition coils have been in use for a while and their lifespan exceeds 100,000 kilometers, it is advisable to replace all of them even if only one has failed. Ignition Coil Replacement Procedure: 1. Open the engine hood and remove the engine cover if present, exposing the ignition coils for each cylinder. 2. Slowly lift the yellow plug outward, being careful not to break it. Then press down on the black latch handle while gently pulling the plug outward. Since each plug corresponds to a specific cylinder, ensure they are not mixed up. 3. Use the appropriate socket tool to remove the fixing screws for each ignition coil and pull out the coils. 4. Insert the new ignition coils into the coil holes, ensuring they are securely connected to the spark plug ends. 5. Secure the ignition coils with the fixing bolts and plug in the corresponding coil connectors for each cylinder, pushing the plug locks inward to the locked position. 6. After installation, test whether the ignition coils are functioning properly. If everything is normal, reattach the engine cover to complete the process.