Quick answer: Ignition Coils on a 2018–2024 Jeep Wrangler is rated Advanced and takes about 2-4 hours. You'll need 4 tools for this job, and parts cost about $95. 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 |
— |
$95.00 |
|
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 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 — Tom Becker
I always swap-test the suspect coil to a different cylinder before buying — if the misfire follows the coil, I've got my answer; if it stays, it's the plug, injector, or compression.
2
Cool the engine and prepare safely
Park 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 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 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.
5
Remove the old coil
Remove the 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.
🔧 Mechanic's note — Ray Delgado
A little dielectric grease in the boot goes a long way for me, but only a little — I've learned too much and the coil floats on the plug instead of seating.
7
Reconnect and verify operation
Reconnect the 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
