2010–2013 Hyundai Tucson 2.4L Coil & Spark Plug Replacement

Ignition coil and spark plug replacement on a 2010–2013 Hyundai Tucson with the 2.4L gasoline four-cylinder engine may help when diagnosis confirms an ignition-related rough idle, hesitation, hard start or loss of power. P0300 indicates random or multiple misfires; P0301–P0304 identify a misfiring cylinder. These symptoms and codes alone do not prove that a coil or spark plug is defective, so check for wiring, fueling, air-leak and mechanical causes before installing a set.

Application overview

The covered Tucson has four individual ignition coils over four spark plugs. Access is from above the engine after removing the cosmetic cover and releasing the coil connections. This is a four-cylinder ignition job, not the six-cylinder procedure used on an older Tucson or a later turbo-engine procedure.

Connector shape is a key purchasing check. The submitted product selects the angled electrical-connector version; a straight connector is not an interchangeable choice merely because the mounting bolt appears to line up. Compare the original connector, coil length, boot shape and part identification before buying.

DIY skill

Moderate DIY skill: careful connector handling, plug-well cleaning and accurate low-torque assembly.

Estimated time

Allow about 1–2 hours for all four coils and plugs after diagnosis on an intact, accessible vehicle. Broken locks or stuck plugs add time.

Estimated parts budget

$60–$110 for a budget four-coil/four-plug kit and basic supplies. Planning estimate excludes tools, tax, shipping and repairs to wiring or oil leaks.

Featured product

A-Premium APIC0553D, ASIN B09Z6L6LGS, is the black angled-connector kit supplied with four ignition coils and four iridium spark plugs. The coils use two blade terminals and bolt-on mounting. The listing’s shorthand “set of four” refers to the four-cylinder set; the matching seller listing identifies eight individual components.

The selected kit references coil numbers 273002G000, 273003F100 and UF611. Those are identification aids, not permission to use any plug bundled with a similar coil. Replacement connector housings, valve-cover seals and a complete tool set are separate purchases. Claims about improved power or fuel economy should not replace diagnosis; restoring a failed ignition system is different from adding performance to a healthy one.

View the angled-connector coil and plug kit

Four used spark plugs showing ceramic insulators, threads and firing electrodes — Reference photograph of used spark plugs; these are not the featured kit or proof of vehicle fitment. Photo: Aidan Wojtas / Wikimedia Commons · CC BY-SA 2.0. Image reproduced without edits.

Vehicle compatibility

Make and model	Listed model years	Engine	Selection restriction
Hyundai Tucson	2010–2013	2.4L inline-four	Main overview; angled-connector coils. Do not extend to later GDI years.
Hyundai Tucson	2011–2013	2.0L inline-four	Separate engine-specific procedure and plug specification.
Hyundai Santa Fe	2010–2012	2.4L inline-four	Not the later Santa Fe Sport or V6.
Hyundai Sonata	2009–2010	2.4L inline-four	Do not extend to later hybrid/turbo/GDI applications.
Kia Forte / Forte Koup	2010–2013	2.0L or 2.4L inline-four	Match exact engine and angled connector.
Kia Forte5	2012–2013	2.0L or 2.4L inline-four	Seller’s narrower kit list; check market and engine.
Kia Optima	2009–2010	2.4L inline-four	Not every Optima engine or later model.
Kia Sorento; Sportage	2011–2013	2.4L inline-four	Verify engine/injection configuration and actual plug specification.
Hyundai Equus; Genesis	2011; 2009–2012	4.6L V8	Seller-listed; four coils/plugs do not service all eight cylinders.
Kia Borrego	2009–2011	4.6L V8	Seller-listed; partial quantity, market-dependent availability.

The table follows the narrower complete-kit application list. The listing also contains broader coil-oriented wording extending some models to later years. Do not use that wording to extend plug compatibility. Engine displacement, injection system, connector direction and plug specification all need to agree with the exact vehicle.

A V8 appearing in a seller application list does not turn four coils and four plugs into a full-engine service kit. This page’s repair overview remains limited to the 2010–2013 Tucson 2.4L. Other models need their own access and tightening instructions, even when the seller lists the same kit.

Symptoms and diagnosis before replacement

Read stored and pending codes and save freeze-frame data. Note whether the complaint occurs at cold start, hot idle or under acceleration; a short idle check may not reproduce an intermittent fault.
Inspect the intake duct, vacuum connections, coil harness and connector locks. A loose connection or damaged wire can imitate a failed coil and may remain after new parts are installed.
Check for oil, moisture or debris around the coil boots and in the plug wells. Correct the source of contamination before fitting replacements; do not let liquid or dirt fall into a cylinder.
Keep cylinder identification when removing parts. Compare the four plugs for unusual deposits, cracked insulators or uneven wear rather than treating all discoloration as a coil problem.
If a controlled coil-swap test is appropriate, move only compatible coils with the ignition off and keep a written record. A misfire that follows the coil supports further investigation of that coil; a fault that stays on the cylinder calls for plug, injector, wiring or mechanical checks.
Use professional testing when the cause remains uncertain. Hyundai’s 2012 2.4L service information includes compression testing for lack of power, excessive oil consumption or poor economy. A box of ignition parts cannot repair low compression.

Do not create a new fault while testing: connector pins, brittle locks and boots can be damaged by repeated handling. If the engine shakes badly or the warning lamp flashes, stop the test. Clear codes only after saving the evidence and completing the appropriate repair, then check for recurring pending faults.

Tools, parts and supplies

Tool or Supply	Exact Product	Product Link	Purpose and Selection Check
OBD-II code reader	Autel AutoLink AL319	View obd-ii code reader	Read and save codes and freeze-frame information before disconnecting power. Advanced ignition tests require additional equipment and training.
3/8-inch ratchet, sockets and extensions	TEKTON SKT15301, 46-piece set; metric sizes 8–19 mm	View 3/8-inch ratchet, sockets and extensions	Ratchet, metric sockets and extensions for accessible cover/coil hardware. Includes 10 mm; match the actual bolt heads and avoid forcing a connector.
Spark-plug socket	GEARWRENCH 80546, 3/8-inch-drive 5/8-inch magnetic swivel socket, 6-inch length	View spark-plug socket	5/8-inch magnetic plug socket; the 2012 Tucson 2.4L factory procedure specifies a 16 mm plug wrench. Confirm clearance and the supplied plug’s hex.
Spark-plug torque wrench	TEKTON TRQ51402, 3/8-inch drive, 10–100 ft-lb	View spark-plug torque wrench	Use only after confirming the exact plug’s torque, thread treatment and units. Select a setting within the tool’s 10–100 ft-lb rated range.
Coil-bolt torque wrench	TEKTON TRQ50402, 1/4-inch drive, 20–200 in-lb	View coil-bolt torque wrench	20–200 in-lb range for small fasteners after their correct specification is established. Do not apply spark-plug torque to coil retaining bolts.
1/4-inch sockets—if not already owned	TEKTON SKT05303, 56-piece socket and ratchet set; metric sizes 4–15 mm	View 1/4-inch sockets—if not already owned	Optional if you already own the needed 1/4-inch-drive socket. A matching drive avoids stacking adapters on low-torque fasteners.
Eye protection	DEWALT DPG82-11 Concealer, clear lens, one pair	View eye protection	Protect eyes during debris removal and close work around the engine; choose a comfortable fit with other protective equipment.

Have a wire-type gap gauge, clean low-lint cloths, an inspection light and a controlled method of removing loose debris ready before opening a plug hole. Match the gauge to the approved plug specification. Avoid using a tapered coin-style gauge to force the fine center electrode, and never assume that the shipping gap is the correct application setting.

A small connector-release tool or pocket screwdriver can assist a designed locking tab, but it must not pry against the terminals. Gloves should allow enough feel for hand-starting threads. Use only lubricant approved by the replacement coil or boot maker; filling a boot with grease is unnecessary and can interfere with seating.

Routine coil and plug service does not require an intake-gasket kit or draining coolant. If inspection finds an oil leak into the plug wells or broken wiring, treat that as a separate repair with the correct vehicle-specific parts. Do not buy unrelated components simply because they are shown beside the ignition kit.

DIY versus professional cost

Expense	Planning estimate	Scope
Four-coil/four-plug kit and basic supplies	$60–$110	Budget aftermarket parts; no wiring or oil-leak repair.
Tools, if starting without them	$80–$250 additional	Depends on sockets, scan reader, torque tools and supplies already owned.
Professional diagnosis	$100–$200	Often separate from replacement labor.
Installation labor	$100–$250	Accessible four-cylinder service on an intact vehicle.
Parts plus installation	$160–$360	Excludes diagnosis, taxes and unforeseen repairs.
DIY time	1–2 hours	After diagnosis and parts confirmation.

These are estimates for comparing the job’s scope, not current retail prices or local shop quotes. A shop may use different parts and provide labor warranty coverage. Ask whether a quote includes all four plugs, four coils, diagnosis and inspection of the wells. Tool costs can make a single DIY job more expensive than expected, while tools already owned reduce that expense.

Plug and connector checks before disassembly

For this exact listing, one fitment bullet describes a 0.044-inch preset gap while the specification block labels a value of 1.0–1.1 as inches. Those statements must not be treated literally as equivalent. Obtain the actual plug identification and the correct gap in clear units for the engine, and inspect each plug for damage before fitting it.

The same listing labels its installation value as 25–30 N. Newtons measure force, not torque, so obtain the manufacturer’s explicit tightening value and thread-treatment instruction. Do not silently change the units, average incompatible specifications or copy a later Tucson engine’s torque. The spark-plug and coil-retaining bolts require separate instructions.

The 2012 Tucson 2.4L factory procedure identifies a 16 mm plug wrench and four plugs. Check the supplied plug’s hex, reach and seat against the correct application. A plug that threads in is not automatically correct: electrode position, heat range and internal construction also matter. Do not assume a referenced NGK number means the included plug was manufactured by NGK.

Step-by-step replacement overview

Confirm the engine, connector and fault. Verify the 2.4L application, save scan data and inspect the original coils. Compare the new angled connectors before beginning. Establish the exact plug gap, torque and thread instructions in advance.
Prepare the vehicle. Cool the engine, switch the ignition off and isolate the negative battery cable. Protect the painted surfaces and place tools where they cannot fall into the engine bay. Keep the four cylinders identified throughout the work.
Remove the cosmetic engine cover. Release its actual retainers without levering against hoses, wiring or the valve cover. Set the cover and any hardware aside together. Inspect the now-visible coil area for dirt and fluid before opening anything.
Release the electrical connectors. Identify the secondary lock, release it as designed and depress the connector latch. Pull on the connector body, not the wires. A connector that will not release should be examined closely rather than forced with pliers.
Remove one coil at a time. Remove its retaining bolt and withdraw the coil with a controlled straight lift and gentle rotation if needed. Inspect the boot and spring contact and keep the part labeled. Resolve oil or water in the well before loosening the plug.
Clean and remove the plug. Clear debris while the old plug still seals the cylinder. Place the correct plug socket squarely on the hex and use a suitable extension. Turn with hand force and stop if resistance suggests thread damage or binding. Avoid power tools.
Inspect the removed and replacement plugs. Compare the old plug with the confirmed application specification and examine the new porcelain and tip. Check the approved gap without pushing against the fine electrode. Replace a damaged new plug rather than trying to hide the damage with adjustment.
Install the plug by hand first. Lower it gently, follow the specified thread preparation and start it with the socket and extension by hand. It should turn smoothly for several turns. Only then use the torque wrench at the verified setting for the exact plug and engine.
Install the matching coil. Confirm that its boot and contact are intact. Seat it fully on the plug, fit the retaining bolt and tighten using the correct coil-fastener specification. Reconnect the plug until its latch and secondary lock are properly engaged.
Repeat and restore the cover. Complete the remaining cylinders without mixing labels or leaving an open plug hole unattended. Check all four connectors, account for every bolt and restore the cosmetic cover and any displaced retainers.
Verify normal operation. Reconnect the battery using the vehicle procedure. Start the engine and inspect for a smooth idle and securely connected components. Stop for severe shaking or a flashing lamp. Review codes, make a cautious road check when safe, and recheck pending faults after reproducing the original operating conditions.

Supplementary repair demonstration

The following 1A Auto video shows a 2010–2013 Kia Forte Koup 2.4L. It is a related four-cylinder example for handling individual coils, connector locks and plugs, not a video of the Tucson. Engine-cover details and tightening instructions must come from the exact vehicle and replacement parts.

Common mistakes

Buying the straight-connector version when the vehicle requires the angled connector.
Using broader coil-only fitment to justify the included plugs on a different engine.
Calling a four-cylinder kit a complete V8 tune-up set.
Guessing the units in a product specification or transferring later-engine torque values.
Dropping debris into a cylinder, damaging a connector lock or forcing a plug thread.
Replacing coils without addressing contaminated wells, damaged wiring or another confirmed cause of the misfire.

Frequently asked questions

Must all four coils be replaced?

No. A confirmed single-coil failure does not prove that the remaining coils are bad. A complete set is a purchasing option; diagnosis, age and condition should determine what actually needs replacement.

Will these fit a 2014 Tucson because the coil listing mentions later years?

Do not assume that. The complete-kit scope used here ends at 2013 for the 2.4L Tucson. A coil’s application range and a bundled plug’s range can differ, so both need confirmation.

Does the connector angle matter if both coils have two pins?

Yes. Terminal count alone does not establish connector fit, harness clearance or mounting geometry. Match the existing connector and exact coil application.

Is an iridium plug a guaranteed fuel-economy upgrade?

No. Correct replacement plugs can restore operation lost to worn or failed parts. They do not guarantee an improvement over a healthy, correctly specified ignition system.

What if a new kit does not fix the misfire?

Check the installation and return to diagnosis. A connector left loose, a cracked plug, a fueling fault or poor compression can remain even when all four coils are new.