Hyundai 27300-2E000 Ignition Coils & NGK 9723 Spark Plugs – Set of 4 | OEM Replacement Kit
Hyundai 27300-2E000 Ignition Coils & NGK 9723 Spark Plugs – Set of 4 | OEM Replacement Kit
Upgrade your ignition system with the Hyundai 27300-2E000 Ignition Coil & NGK 9723 Spark Plug Set (4 Coils + 4 Plugs). This complete OEM-quality kit ensures powerful ignition, smooth performance, and long-lasting reliability — perfect for restoring factory performance in Hyundai and Kia vehicles.
Features & Benefits
- ✅ Genuine Hyundai OEM ignition coils & NGK spark plugs
- ✅ Complete tune-up set for reliable ignition performance
- ✅ Enhances fuel efficiency, throttle response, and overall engine power
- ✅ Built to meet or exceed OEM durability and fitment standards
- ✅ Trusted by mechanics and recommended by Hyundai
Vehicle Compatibility
This ignition coil & spark plug set is compatible with select Hyundai & Kia models, including:
- Hyundai Sonata, Elantra, Santa Fe, Tucson (various 2.0L / 2.4L engines)
- Kia Optima, Sportage, Sorento (select models)
(Confirm exact fitment with your vehicle owner’s manual or OEM part number.)
Cross Reference
- Ignition Coil: Hyundai 27300-2E000 = UF651, 5C1748, C1801
- Spark Plug: NGK 9723 = ILFR5E11, 6240, Denso 5344 equivalent
(Cross references provided for guidance. Verify before purchase.)
What’s Included
- 4 × Genuine Hyundai 27300-2E000 Ignition Coils
- 4 × Genuine NGK 9723 Spark Plugs
Why Buy From Us
- 🔧 100% Genuine Hyundai & NGK Products
- 🚙 OEM Fitment for Hyundai & Kia vehicles
- 🚀 Fast USA Shipping & Easy Returns
- ✅ Trusted Auto Parts Supplier
❓ FAQ
Q: Which specific engine platforms and displacement types is this ignition set designed for?
A: This kit is specifically optimized for Hyundai and Kia’s "Nu" and "Theta II" 4-cylinder engine families. These are naturally aspirated 2.0L and 2.4L engines widely found across their mid-2010s lineup. The 27300-2E000 coil is a "coil-on-plug" design that relies on these specific NGK 9723 (Iridium) plugs to maintain the correct electrical impedance and heat range required by the Hyundai/Kia Engine Control Unit (ECU).
Q: Why is it recommended to replace both the ignition coils and the spark plugs at the same time on these specific engines?
A: Hyundai and Kia engines of this generation are highly sensitive to electrical resistance. As a spark plug wears, the electrode gap widens, which forces the ignition coil to generate higher voltage to jump the gap. This extra stress causes the ignition coil's internal electronic driver to run hotter, eventually leading to premature coil failure. Replacing both components as a matched set—using genuine Hyundai coils and OE-spec NGK Iridium plugs—ensures the ignition system operates at the exact factory-intended load, preventing future misfires and protecting the coil packs from "burnout."
Q: What are the exact step-by-step instructions for performing this tune-up, and are there any "gotchas" with these specific engine covers?
A: These engines feature a prominent plastic top-mounted engine cover that must be removed to access the coils. The procedure is straightforward, but cleanliness is the priority:
Ensure the engine is cool. Remove the plastic engine cover (usually held on by four 10mm bolts or rubber grommets). Locate the four ignition coils (27300-2E000) secured by a single 10mm bolt each. Disconnect the electrical harness by pressing the locking tab on the side. Remove the bolt and pull the coil straight up and out.
Before removing the plugs, use a shop vacuum or compressed air to clean around each spark plug well. Dirt trapped here will fall directly into the cylinder once the plug is out. Use a 5/8-inch spark plug socket with a long extension to unscrew the old plugs counterclockwise.
Verify the gap on the new NGK 9723 plugs (usually pre-gapped, but always check). Thread each plug into the cylinder head by hand for at least 4 full turns to prevent cross-threading in the aluminum head. Once seated by hand, torque the plugs to 15–18 lb-ft (20–25 N·m).
Apply a tiny, pea-sized amount of dielectric grease inside the bottom tip of each new 27300-2E000 coil boot. This prevents the rubber from sticking to the spark plug and helps create a moisture-proof seal. Press each coil firmly down onto the spark plug until you feel a secure "click" or seat.
Reinstall the 10mm mounting bolts for the coils. Do not over-tighten, as you are threading into a plastic or aluminum valve cover. Reconnect the four electrical harness clips, ensuring they click into place. Reinstall the plastic engine cover. Start the engine; it should idle smoothly with no hesitation. If you had a previous "Check Engine" light for a misfire (P0300–P0304), use an OBD-II scanner to clear the codes.