Quick answer: Ignition Coils on a 2016–2021 Honda Civic is rated Moderate and takes about 1-2 hours. You'll need 4 tools for this job, and parts cost about $75. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name |
Part Number |
Price |
Buy |
| Replacement ignition coil; verify engine, cylinder, and connector by VIN |
— |
$75.00 |
|
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Step-by-Step Instructions
Follow these steps carefully
1
Confirm the misfire diagnosis
Scan the 2016-2021 Honda Civic for DTCs and identify the cylinder. Inspect the spark plug, coil boot, connector, harness, injector, intake leaks, and compression before condemning the coil; swap-test only when safe and appropriate.
🔧 Mechanic's note — Ray Delgado
Before I condemn a coil on a Civic, I check the plug and boot first — a cracked boot arcs and throws the same code as a dead coil. I only swap-test when it's safe, because guessing at coils gets expensive fast.
2
Cool the engine and prepare safely
Park the 2016-2021 Honda Civic on level ground, set the parking brake, switch the ignition off, let the engine cool, and disconnect the negative battery cable if required by the service procedure. Keep clear of EV/high-voltage parts.
3
Remove covers and gain access
Remove the engine cover, intake duct, or other access pieces needed to reach the 2016-2021 Honda Civic ignition coils. On V6 engines, follow the engine-specific procedure for any upper intake manifold or rear-bank access.
4
Disconnect the coil
Photograph the 2016-2021 Honda Civic coil layout. Press the connector lock and unplug the suspect coil without pulling on the wires. Blow debris away from the coil and bolt before removal.
🔧 Mechanic's note — Tom Becker
I photograph the coil layout on every Civic before touching a connector — the locks get brittle with heat. Press the lock fully and pull the plug body, never the wires; I've snapped enough tabs to know the zip-tie fix never holds.
5
Remove the old coil
Remove the 2016-2021 Honda Civic coil retaining bolt with the correct socket, then twist and lift the coil straight out. Inspect the boot, plug well, connector, and nearby wiring for oil, moisture, cracking, or carbon tracking.
6
Install and torque the replacement
Compare the new coil with the removed part, apply only a small amount of dielectric grease inside the boot if specified, seat it fully over the spark plug, start the bolt by hand, and tighten to the exact engine-specific torque.
7
Reconnect and verify operation
Reconnect the 2016-2021 Honda Civic coil connector until it locks, reinstall all covers and intake parts, reconnect the battery if disconnected, clear codes only after recording them, start the engine, and road-test while checking for repeat misfire codes.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Replacing a coil without scanning codes and confirming the misfire follows the coil
- • Ordering the wrong coil for the engine, bank, or cylinder
- • Pulling on a connector wire or mixing up connectors
- • Dropping dirt into a spark-plug well or leaving the coil boot unseated
- • Over-torquing the small coil bolt or ignoring a damaged spark plug and wiring
