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If you own a 2013-2017 Honda Accord, the right spark plugs make a big difference in everyday drivability. Worn or improper plugs can cause rough idle, reduced fuel efficiency, and occasional misfires that are most noticeable during cold starts. This guide focuses specifically on spark plugs suited to the 2013-2017 Accord engine range and highlights top shortlisted options chosen for durability and consistent ignition performance.We evaluated candidates for longevity, cold-start behavior, and heat range compatibility with the Accord. Below are the top picks and the criteria that matter so you can pick the plug that best matches your driving habits and service schedule.
Looking for other parts? See all Honda Accord parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | STZJAYE Iridium Spark Plugs 4-Pack (93501 / LKAR7BIX-11S) |  |
| Best Quality Built to a higher standard if you want something more solid | Genuine Honda Spark Plug 12290-5A2-A02 (Regular) |  |
| Best Value The sweet spot between price and what you get | X4XZ 93501 Double Iridium Spark Plug (LKAR7BIX11S Equivalent) |  |
| Best Budget The cheapest option that still gets the job done reliably | BDFHYK Iridium Spark Plug Set of 4 (vehicle-specific fit) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Sixity Auto 4-Pack NGK Iridium IX Spark Plugs for Honda Accord 2.0L/2.4L (2013–2017) |  |
| Most Popular A crowd favorite that many people choose with confidence | NGK Iridium IX Spark Plug LKAR7BIX-11S, 4-Pack |  |
| Best Seller A high-volume bestseller chosen again and again | NGK Iridium IX LKR7DIX-11S Spark Plug — 4 Pack |  |
1. STZJAYE Iridium Spark Plugs 4-Pack (93501 / LKAR7BIX-11S)
| Thread Size | M14x1.25 |
|---|---|
| Core Material | Iridium |
| Top Material Type | Iridium |
| Automotive Fit Type | Vehicle Specific Fit |
These STZJAYE iridium spark plugs are a direct-replacement style set sold in a four-pack intended for vehicle-specific fitments such as the 2013–2017 Honda Accord 2.4. They use iridium electrodes, which resist electrode wear and hold a tighter spark gap for longer than standard nickel plugs, so you can expect longer service life and more consistent ignition over time. Typical use is a routine tune-up or OEM-style replacement where you want better longevity without modifying ignition timing or components. Notable features from the listing include M14x1.25 thread size and iridium core and top material. In real-world driving that translates to reliable starts, reduced misfires, and stable idle compared with worn standard plugs. Limitations to note are that fitment must be confirmed against the factory part number before purchase and that these are an aftermarket brand rather than a factory-branded plug, so documented compatibility and long-term durability records are more limited than some established name-brand options.
Best for: Drivers looking for a reliable, longer-lasting replacement during a routine tune-up who want improved spark consistency over standard plugs while keeping a factory-style installation approach.
Less Ideal for: Buyers seeking factory-branded parts with extensive published longevity testing or those who prefer performance aftermarket spark plugs designed specifically for aggressive tuning.
- Iridium electrode for longer life and stable spark gap
- Vehicle-specific fit listed for Honda Accord 2013–2017 2.4L applications
- M14x1.25 thread size matches common Honda spark plug ports
- Sold as a four-pack suited to a 4-cylinder tune-up
- Aftermarket brand with less long-term track record than some OEM-name plugs
- Listing requires buyer to verify exact factory part number for proper fit
Verdict: A cost-effective iridium replacement set that extends service life and restores ignition reliability for 2013–2017 Accord 2.4L tune-ups.
2. Genuine Honda Spark Plug 12290-5A2-A02 (Regular)
| Thread Size | 14mm x 1.25mm |
|---|---|
| Compatible with Vehicle Type | Car |
| Automotive Fit Type | Vehicle Specific Fit |
| Top Material Type | Nickel |
| Core Material | Alloy Steel |
This is a genuine Honda replacement spark plug intended to restore factory ignition performance in compatible Honda engines. It installs like a standard spark plug and is typically used when replacing worn plugs during routine maintenance or when diagnosing misfire and rough idle issues. The plug uses a nickel top material with an alloy steel core and a 14mm x 1.25mm thread size, matching factory specifications to ensure correct fit and heat range. Buyers will appreciate the direct-fit nature that eliminates fitment guesses and helps maintain original engine tuning and efficiency. Because it is a regular, non-precious metal plug, it delivers dependable performance at a lower upfront cost than iridium or platinum alternatives, though it may require more frequent replacements under high-mileage or high-performance driving. Overall this is a straightforward, factory-style option for keeping ignition behavior consistent with how the vehicle was built to run.
Best for: Buyers who prioritize restoring or maintaining factory engine behavior on a Honda and want a direct-fit, manufacturer-specified spark plug without aftermarket modifications.
Less Ideal for: Drivers seeking maximum longevity or the smallest gap drift under aggressive driving should consider iridium or platinum performance plugs instead.
- Factory replacement fit ensures correct thread size and compatibility with Honda vehicles.
- Nickel top and alloy steel core provide reliable, conventional ignition performance.
- Direct OEM part number match removes fitment uncertainty and preserves factory tuning.
- Regular nickel construction is less durable than iridium or platinum alternatives and may need earlier replacement.
Verdict: Choose this genuine Honda plug to maintain factory ignition performance and guaranteed fitment for applicable Honda Accord models.
3. X4XZ 93501 Double Iridium Spark Plug (LKAR7BIX11S Equivalent)
| Thread Size | M14x1.5 |
|---|---|
| Core Material | Iridium |
| Automotive Fit Type | Vehicle Specific Fit |
| Compatible with Vehicle Type | Car |
These X4XZ double iridium spark plugs are a direct-style replacement built around a fine iridium center electrode for stronger ignitability and longer wear life. They are typically used as a straight swap when a vehicle calls for the 93501 / LKAR7BIX11S specification and are aimed at drivers who want a longer-lasting upgrade over standard plugs. Notable features include iridium on both the core and top electrode and a threaded M14x1.5 fit; the listing claims up to about 100000 kilometers of service life and improved cold-start and throttle response. In real use you can expect crisper starts, steadier idle, and slightly better fuel burn compared with older worn plugs. Installation is standard spark-plug replacement; care with torque and anti-seize is still recommended. Limitations are typical for aftermarket plugs: compatibility is vehicle-specific so verify fitment for the exact model year and engine, and long-life iridium plugs are more costly than basic copper replacements even if they save maintenance visits over time.
Best for: Buyers who prioritize fewer maintenance intervals and smoother starting and idling — practical owners who want a durable, factory-style replacement without upgrading to a performance-only plug.
Less Ideal for: If you routinely replace plugs very frequently, track-modify the engine, or need the lowest upfront cost, basic copper or budget plugs may be a better fit.
- Double iridium electrodes for improved ignitability and longer service life
- Vehicle-specific thread size (M14x1.5) for direct replacement in compatible engines
- Designed to match or improve on factory plug geometry for straightforward installation
- Must be matched to the exact vehicle application since fitment is vehicle-specific
Verdict: A durable, vehicle-specific double-iridium replacement that reduces how often you need to change spark plugs while restoring crisper starts and smoother idle.
4. BDFHYK Iridium Spark Plug Set of 4 (vehicle-specific fit)
| Core Material | Iridium |
|---|---|
| Thread Size | M14x1.25 |
| Unit Count | 4.0 Count |
| Automotive Fit Type | Vehicle Specific Fit |
These BDFHYK iridium plugs are a budget-minded replacement set intended to match factory fit and improve ignition consistency. They install like a standard spark plug and are aimed at vehicle-specific applications; the listing includes fitment for many Hondas and similar engines so they are typically used as direct replacements during routine tuneups. Notable features include an iridium center electrode for more sensitive and consistent sparks, ceramic insulators for strength and insulation, and a claimed economic life around 30,000 to 40,000 kilometers. In practice that means smoother starts, fewer misfires, and a potential small gain in combustion efficiency compared with basic copper plugs. Trade-offs are the usual ones for lower-cost iridium options: some buyers question whether the electrode alloy matches premium-brand composition and gaps may need checking and adjustment before installation. Fitment checks and correct torque are important to avoid cross-threading when replacing plugs on overhead valve covers.
Best for: Buyers looking for an affordable, factory-style replacement that improves ignition reliability during routine tuneups and prioritizes value over premium-brand assurance.
Less Ideal for: Drivers who want the longest-lasting, top-tier branded iridium plugs or who prefer guaranteed manufacturer provenance for high-mileage performance should consider higher-end alternatives.
- Iridium center electrode for stronger, more consistent ignition compared with basic copper plugs
- Vehicle-specific fit profile for direct replacement on supported engines
- Ceramic insulator construction for good electrical isolation and durability
- Pack of four covers a full 4-cylinder tuneup
- Gap settings vary out of the box so you may need to re-gap before installation
- Lower-cost iridium option with some uncertainty about alloy composition compared with premium name-brand plugs
Verdict: A cost-conscious way to upgrade from basic plugs to iridium-quality electrodes while keeping factory-style fit for routine tuneups.
5. Sixity Auto 4-Pack NGK Iridium IX Spark Plugs for Honda Accord 2.0L/2.4L (2013–2017)
| Compatible engines | 2.0L and 2.4L L4 (2013–2017 Accord) |
|---|---|
| Pack quantity | 4 pieces |
| Core material | 98 percent copper core |
| Type | Iridium IX spark plug |
These NGK Iridium IX spark plugs are a direct-replacement four-pack intended for 2013–2017 Honda Accord 2.0L and 2.4L L4 engines. They use an iridium center electrode and a tapered ground electrode designed to improve ignitability and deliver longer life compared with standard copper plugs. In practical use they restore crisp throttle response and smoother idling after installation, and many buyers report easy DIY fitment with basic hand tools. The plugs include a high-copper core for efficient heat transfer and arrive packaged with markings typical of genuine NGK parts, which helps confirm authenticity. Expect longer service intervals and more consistent starting than stock copper plugs, but check and gap them before install as a few users prefer to verify pre-gap settings. These are a good choice when you want a factory-style upgrade for improved ignition reliability without modifying your engine or ignition system.
Best for: Drivers who prioritize consistent starts and long service intervals for routine maintenance and want a reliable, factory-style ignition upgrade they can install themselves.
Less Ideal for: People seeking performance modifications beyond a plug upgrade or those who need plugs for different engines or model years outside the 2013–2017 Accord scope.
- Iridium center electrode improves ignitability and extends service life compared with standard plugs
- Direct-fit design specified for 2013–2017 Honda Accord 2.0L/2.4L for straightforward replacement
- High copper core promotes efficient heat transfer and stable operating temperature
- Arrives with manufacturer markings and packaging consistent with genuine NGK parts
- May arrive with a factory gap that some installers prefer to check and adjust before installation
Verdict: Choose these NGK Iridium IX plugs to get a dependable, long‑life factory-style ignition replacement that restores smooth running and reliable starts for 2013–2017 Accord four-cylinder engines.
6. NGK Iridium IX Spark Plug LKAR7BIX-11S, 4-Pack
| Core Material | Iridium |
|---|---|
| Thread Size | M14 x 1.25 |
| Vehicle Service Type | Car, Truck |
| Position | Front, Rear |
The NGK Iridium IX LKAR7BIX-11S is a vehicle-specific iridium spark plug sold as a 4-pack for routine replacement on compatible engines. It uses a 0.6 mm laser-welded iridium tip and a tapered ground electrode to create a strong, consistent spark that helps smoother idling, crisper throttle response and reduced misfires compared with worn plugs. A longer insulator nose and corrugated ribs reduce fouling and flashover while trivalent plating resists corrosion and eliminates the need for anti-seize. In practice these plugs are installed like stock replacements and are often chosen when owners want a durable, factory-quality upgrade that can restore responsiveness and clear misfire codes. Some users report the pre-gap is tighter than OEM recommendations, so a careful check and small gap adjustment during installation may be required and a slim spark-plug socket can help. While most buyers see improved driveability and longevity, there are occasional reports of premature wear on individual units, so inspect plugs at service intervals and replace if abnormal wear appears.
Best for: Drivers who want a durable, factory-quality iridium replacement to restore responsiveness and eliminate misfires while relying on broad user experience as proof the part performs in real cars.
Less Ideal for: People seeking a budget nickel plug for short-term use or users who prefer to experiment with exotic aftermarket gap sizes and custom ignition tuning.
- Iridium 0.6 mm fine tip provides strong, consistent spark for improved ignitability
- Longer insulator nose and corrugated ribs reduce fouling and flashover
- Trivalent plating prevents corrosion and removes need for anti-seize
- Vehicle-specific fit and factory-style design make installation straightforward for compatible engines
- Pre-gapped gap can be tighter than some OEM specs, requiring careful adjustment or a slim socket
- A small number of users report premature wear on individual plugs
Verdict: Choose these NGK Iridium IX plugs if you want a proven, factory-quality iridium replacement that restores engine smoothness and reduces misfires for routine maintenance.
7. NGK Iridium IX LKR7DIX-11S Spark Plug — 4 Pack
| Core Material | Iridium |
|---|---|
| Thread Size | 5/8 inch |
| Vehicle Service Type | Car, Truck |
| Resistor Value | 5K Ohm |
| Position | Front, Rear |
These NGK Iridium IX LKR7DIX-11S plugs are built for drivers who want a durable, high-ignition replacement for factory spark plugs. They use a 0.6 mm iridium tip welded to a tapered ground electrode to improve ignitability and reduce quenching, which helps with throttle response and smoother running under load. The longer insulator and corrugated ribs reduce flashover risk while the triple gasket seal prevents combustion gas leakage, so they behave like a reliable factory-quality replacement. Trivalent metal plating resists corrosion and eliminates the need for anti-seize, and the plugs include a 5K ohm resistor for radio interference suppression. Practical limitations are that gap measurements can vary on arrival so it is wise to check and adjust gap before installation, and compatibility must be confirmed for the specific Accord year and engine variant. For routine tune-ups these plugs offer a straightforward, longer-lasting upgrade over standard nickel plugs.
Best for: A cautious Accord owner who prioritizes reliable, long-lasting replacement parts and wants a plug that behaves like a factory-quality upgrade for everyday driving and occasional spirited use.
Less Ideal for: Drivers looking for a budget disposable option or those who prefer to use only exact factory-specified plug materials without any performance-oriented tip design should consider alternatives.
- Fine 0.6 mm iridium tip for strong ignitability and improved throttle response
- Tapered ground electrode and long insulator reduce quenching and flashover risk
- Trivalent plating prevents corrosion and removes need for anti-seize
- Built-in 5K ohm resistor reduces radio frequency interference
- Gap can arrive out of specification so pre-installation checking and adjustment may be required
Verdict: Choose these NGK Iridium IX plugs if you want a factory-quality, long-lasting replacement that improves ignitability and throttle response for a 2013–2017 Accord.
Choosing the Right 2013-2017 Honda Accord Spark Plug: Key Factors to Consider
Electrode Material and Longevity
Electrode composition directly affects how long a plug will maintain good spark characteristics. Iridium and platinum alloys usually offer longer service intervals compared with standard copper cores, which means fewer replacements over the life of the vehicle.
For a 2013-2017 Accord, longer-lasting materials reduce the chance of misfires and rough idling as mileage climbs. Longevity also influences maintenance planning — higher-durability plugs let you align replacement with major service milestones rather than frequent short-interval swaps. Consider the tradeoff between upfront cost and reduced replacement frequency when selecting material.
Correct Heat Range
Heat range determines how quickly a plug evacuates combustion heat. Using the appropriate heat range helps prevent fouling in low-load, city driving and avoids overheating under sustained high-load or highway conditions.
For the Accord, matching the plug heat range to the factory recommendation is important because the engine's combustion characteristics and compression ratio are fixed. Selecting a plug that runs too hot can increase the risk of pre-ignition, while a plug that runs too cold may foul and cause poor starts or misfires. Choose plugs specified for the engine's operating temperatures and driving style.
Proper Plug Gap and Gap Stability
The spark plug gap affects ignition energy and combustion efficiency. The factory-specified gap ensures reliable firing under the Accord's ignition system voltage and compression conditions.
Gap stability matters because electrode wear can widen or change the gap over time, degrading performance. Some electrode materials and designs maintain gap better than others. When replacing plugs, confirm the correct initial gap and be cautious about excessive re-gapping, which can damage fine electrodes on iridium or platinum plugs.
Fitment and Thread Specifications
Correct physical fit is essential. Thread length, seat type, and reach must match the Accord's cylinder head design to ensure proper sealing and heat transfer.
Using a plug with incorrect reach can damage the valve or piston, while wrong seat type can cause compression leaks. Always verify thread pitch, hex size, and reach against the vehicle specification. Proper fitment also ensures correct torque values during installation, which preserves head integrity and prevents misseating.
Resistance and Ignition System Compatibility
Some spark plugs include a built-in resistor to suppress radio frequency interference and to match ignition coil output. Compatibility with the Accord's ignition coils and wiring affects spark energy delivery and system reliability.
Ensure the replacement plugs match the electrical characteristics expected by the vehicle's ignition system. Using nonresistor or mismatched-resistance plugs can cause interference or suboptimal spark performance. Check the owner's manual or service data for any stated electrical requirements.
Service Interval and Maintenance Considerations
Different spark plug types come with manufacturer-recommended service intervals. Longer intervals reduce maintenance frequency but require careful choice of material and gap settings to avoid mid-interval issues.
Consider how often you prefer to open the engine for maintenance and whether you are comfortable checking plugs at intermediate intervals. If you plan to keep the Accord long-term, select plugs that offer a favorable balance between long service life and consistent performance over time.
Understanding Accord Engine Variants 2013–2017
The 2013–2017 Accord line includes several engine options with slightly different combustion characteristics that influence spark plug selection. Knowing which engine is in your vehicle helps identify the correct heat range and reach specifications for replacement plugs.
- Check your engine code and compression specification before ordering plugs.
- Confirm factory-recommended gap and plug reach for the specific engine variant.
- Consider driving conditions when choosing a heat range to avoid fouling or pre-ignition.
Symptoms That Point to Spark Plug Issues
Certain drivability symptoms commonly trace back to spark plug wear or incorrect plugs. Pay attention to idle quality, throttle response, and starting behavior when diagnosing potential plug problems.
- Rough idle or vibration at idle can indicate electrode wear or gap drift.
- Hard starting or repeated cranking during cold starts often points to plugs that are fouled or past their service life.
- Intermittent engine misfire under load suggests electrode degradation or incorrect heat range.
Preparing for a Spark Plug Replacement Service
Preparation reduces the chance of installation errors. Use the correct tools, a torque wrench, and the specified socket to avoid damaging the plug or cylinder head. Clean the plug wells and inspect coil boots and wires while the plugs are out.
- Work on a cool engine to avoid thread damage and burns.
- Mark coil locations if the ignition pack is removed to maintain correct firing order.
- Use anti-seize only if recommended for that plug type and apply the specified torque during installation.
How Plug Choice Affects Fuel Economy and Emissions
A properly firing plug contributes to complete combustion, which helps fuel efficiency and reduces unburned hydrocarbons. Worn plugs can increase fuel consumption and cause higher emissions during acceleration and idle.
- Fine-electrode plugs often support more complete combustion with less energy loss.
- Maintaining the correct gap preserves combustion efficiency over the plug life.
- Addressing misfire symptoms promptly prevents catalytic converter stress and emissions faults.
When to Inspect Other Ignition Components
Spark plugs are only one part of the ignition system. If plugs show rapid wear or persistent misfires after replacement, inspect coils, wiring, and the ignition control system for faults that mimic plug problems.
- Perform a coil resistance and output check if misfires persist after new plugs.
- Inspect wiring and connectors for corrosion or heat damage.
- Evaluate fuel and air delivery if misfires occur under specific load conditions.
Still looking for the perfect fit?
Select your Honda Accord configuration to see the most relevant Spark Plugs recommendations
How We Chose the Best 2013-2017 Honda Accord Spark Plug
To assemble this list we applied filters that reflect the real-world priorities of 2013-2017 Honda Accord owners. Key evaluation dimensions included electrode material and expected service life, measured by manufacturer life ratings and typical real-world replacements. We also assessed cold-start ignition performance and tendency to reduce misfire incidents, using documented cold-start behavior as a proxy. Heat range compatibility was checked against factory specifications and engine operating profiles across the Accord trim and engine options for these years.Other considerations included plug gap stability over time and compatibility with recommended torque and installation procedures to avoid fouling or pre-ignition risks. We prioritized plugs with consistent resistance and fitment that match the Accord's recommended part dimensions. Items excluded were plugs intended solely for racing or extreme forced-induction builds, aftermarket units requiring custom gap settings beyond factory tolerances, or options lacking clear service-life information. The result is a shortlist of plugs that balance longevity, ignition reliability, and straightforward installation for typical Accord ownership.
Our full evaluation process is outlined in our review methodology.
FAQ
How often should I replace spark plugs on a 2013-2017 Honda Accord?
It depends on the plug material and driving habits. Copper-core plugs typically need replacement more frequently, while iridium or platinum designs often last much longer. Check the manufacturer service interval and inspect plugs if you notice rough idle or reduced starting reliability.
Can I gap new plugs myself for the Accord?
You can gap new plugs, but be cautious with fine-wire iridium or platinum electrodes because excessive bending can damage them. Verify the factory-specified gap and use a proper feeler gauge and gentle technique if adjustment is necessary.
What cold-start symptoms indicate a spark plug problem?
Cold-start issues often include extended cranking, rough idle until the engine warms, or white or black deposits on electrodes. These signs usually indicate fouling, worn electrodes, or incorrect heat range for frequent short trips.
Will changing spark plugs fix an engine misfire?
Sometimes replacing worn or fouled plugs resolves misfires, especially if the plugs are the root cause. If misfires continue after new plugs, further diagnosis of coils, fuel delivery, and sensors is warranted because multiple systems can cause similar symptoms.
Do spark plug heat ranges matter for everyday driving?
Yes. The correct heat range helps the plug self-clean and avoid fouling on short trips while preventing overheating on sustained high-load runs. Stick to heat ranges recommended for your Accord engine and adjust only if you understand the tradeoffs.
Should I check plug well condition when replacing plugs?
Always inspect plug wells for oil, debris, or corrosion. Oil in the well can indicate valve cover gasket issues, and debris can prevent proper seating and torque, so address any well contamination before installing new plugs.
Final Verdict
For a 2013-2017 Honda Accord, prioritize plugs that match the factory heat range and use durable electrode materials to extend service life and preserve starting reliability. Balance gap stability and fitment correctness with your maintenance preferences and driving style. If you experience cold-start misfires or rough idle, address the plug choice first, but be prepared to inspect coils and wiring if symptoms continue. Selecting the right plug for the Accord's engine variant will give the most reliable day-to-day performance and the fewest surprises during routine service.
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