Quick answer: Spark Plug Replacement on a 2011–2024 Dodge Durango is rated Advanced and takes about 1-3 hours. You'll need 4 tools for this job, and parts cost about $115. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name |
Part Number |
Price |
Buy |
| Correct spark plug set for 2011-2024 Dodge Durango; verify engine, heat range, gap, and VIN fitment |
— |
$115.00 |
|
| Coil-boot seals or ignition coils only if inspection finds damage Optional |
— |
$35.00 |
|
| New upper intake plenum gaskets |
— |
— |
|
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 engine and plug fitment
Confirm your 2011-2024 Dodge Durango's engine, because the plug count and part number split three ways. The 3.6L Pentastar V6 takes six NGK 97390 iridium plugs gapped to 0.043 inches. The 5.7L HEMI V8 is a dual-plug engine — sixteen plugs total, two per cylinder — using NGK LZFR5C-11 (stock 92174) gapped to 0.043 inches. The 6.4L SRT takes sixteen iridium plugs of its own spec; confirm on your emissions label. Scan for misfire codes (P0300-P0308) first: on the HEMI, a single-cylinder miss can be one of that cylinder's two plugs or its coil, so note the cylinder number before you buy sixteen plugs you may not need.
2
Cool and expose the plugs
Let the 2011-2024 Dodge Durango cool completely. On the 3.6L Pentastar, the three rear plugs hide under the upper intake plenum — there is no shortcut: remove the intake resonator and ducting, disconnect the throttle body and its sensors, unbolt the plenum, and lift it off, planning to replace the plenum gaskets on reassembly. On the 5.7L HEMI the sixteen coil packs sit right on the valve covers and are directly accessible once the engine cover is off. Disconnect the negative battery terminal before unplugging any coils on either engine.
3
Remove coils and clean wells
Release each coil connector's locking tab, remove the 10mm coil hold-down bolts, and pull the coils straight up, keeping them in cylinder order. On the 5.7L HEMI, remember each cylinder has two coils and two plugs — do one cylinder completely before moving on so the pairs never get mixed. Blow every plug well out with compressed air on the 2011-2024 Dodge Durango before loosening a plug; the deep HEMI wells collect debris that will fall straight into the cylinder. Cover open wells with a rag while you work.
🔧 Mechanic's note — Ray Delgado
I've learned the hard way — Don't learn this the expensive way: On the 5.7L HEMI, remember each cylinder has two coils and two plugs — do one cylinder completely before moving on so the pairs never get mixed.
4
Remove and install plugs
Remove each old plug with a 5/8-inch (16mm) spark plug socket, keeping the socket straight, and compare it to the new NGK: identical thread, reach and heat range. The new plugs come pre-gapped to 0.043 inches — verify with a wire gauge but never pry on the iridium or platinum electrodes. Thread each plug in by hand for several turns until it seats; on the HEMI's deep wells, an extension with a wobble joint helps you feel the threads engage. Torque to the FCA spec in your owner's manual and install them dry — NGK's trivalent thread plating needs no anti-seize, which would over-torque the plug.
🔧 Mechanic's note — Tom Becker
Quick word from me — I've been under there: The new plugs come pre-gapped to 0.043 inches — verify with a wire gauge but never pry on the iridium or platinum electrodes.
5
Reconnect and verify
Apply dielectric grease inside each coil boot only, then reseat every coil fully onto its plug, torque the 10mm bolts snug, and reconnect each locking-tab connector with a click. On the 3.6L, refit the upper intake plenum with new gaskets, torquing the plenum bolts in the factory sequence, and reconnect the throttle body and every vacuum line and sensor you disturbed. Start the 2011-2024 Dodge Durango, confirm a smooth idle with no check-engine light, and road-test; rescan for misfire codes, because a miss that stays on one cylinder now implicates that cylinder's coil rather than the fresh plugs.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Using the wrong plug or assuming a pre-gapped plug needs no verification
- • Blowing debris into an open cylinder or plug well
- • Cross-threading a plug or tightening it without a torque wrench
- • Overusing anti-seize or dielectric grease on the plug threads
- • Mixing coil connectors or ignoring a misfire after reassembly
