Best Spark Plugs For 2012 Nissan Altima

When I was tackling a rough idle issue on my own 2012 Nissan Altima (2.5L engine), I quickly realized that the spark plugs were the starting point for better engine performance and restored fuel economy. Choosing the right set of plugs isn’t just about grabbing the cheapest option; it’s about finding a set that offers maximum longevity and reliable ignition power tailored for the Altima’s specific needs. I’ve put together this comprehensive comparison of the best spark plugs for the 2012 Nissan Altima based on quality, reliability, and real-world results, so you can make an informed decision and get your sedan running smoothly again.

IMAGE	PRODUCT NAME	AMAZON LINK
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon
	4 pc NGK Iridium IX Spark Plugs compatible with Nissan…	View on Amazon
	Set of 4 Ignition Coil Pack and Spark Plugs Fits…	View on Amazon
	9029 Double Iridium Spark Plug Compatible with 2007-2019…	View on Amazon
	TAUTOY 9029 DILKAR6A11 Spark Plugs Double Iridium 4PCS For…	View on Amazon
	Marsram Ignition Coil Pack UF549 and Spark Plug 9029 Fits…	View on Amazon
	4Pcs UF549 Ignition Coil Pack and 9029 Iridium Spark Plug…	View on Amazon

A-Premium Iridium Platinum Spark Plugs Compatible with Nissan Altima 2007-2013, Rogue, Rogue Select, Sentra, Versa, Versa Note, Frontier, NV200 & Chevrolet City Express & Suzuki Equator, Pack of 4

If you’re looking for high-quality replacement plugs that meet or exceed OEM specifications, A-Premium is a solid choice. These plugs feature a dual metal construction—Iridium for the center tip and Platinum for the core—designed for superior durability and a longer lifespan. They come pre-gapped to the recommended 0.044 inch, making installation straightforward right out of the box, which is perfect for DIY mechanics focusing on reliable 2012 Nissan Altima maintenance.

Key features that stand out:

• Construction: Iridium center tip and Platinum core material offers extended performance.
• Longevity: Engineered to last between 80,000 to 100,000 miles under normal conditions.
• Fitment: Specifically designed to be a direct replacement for the LKAR6AIX-11 reference number.

Pros:
– Excellent extended service life due to Iridium/Platinum combination.
– Direct fit and pre-gapped, simplifying the installation process.
– High resistance rating ensures stable spark delivery.

Cons:
– While high quality, they are often priced slightly higher than basic copper plugs.

Best for: Drivers seeking a high-mileage, set-it-and-forget-it replacement plug with excellent longevity.

Expert Opinion: This plug’s strength lies in its hybrid metal structure, providing the sharp ignitability of Iridium combined with the temperature stability of Platinum, offering a great balance of performance and extended replacement intervals for the Altima 2.5L engine.

4 pc NGK Iridium IX Spark Plugs compatible with Nissan Altima 2.5L L4 2007-2013

NGK is practically the gold standard when it comes to ignition components, and their Iridium IX line is known for delivering focused spark energy and exceptional durability. This specific 4-pack is an exact fit for the 2.5L L4 engine found in the 2012 Altima, ensuring optimal performance right from the start. They are designed to offer better throttle response and more consistent idling compared to standard plugs, making a noticeable difference in how your car drives.

Key features that stand out:

• Ignitability: Fine Iridium tip ensures high ignitability and reduced voltage requirements.
• Brand Reliability: Genuine NGK parts, guaranteeing adherence to stringent quality controls.
• Performance Focus: Designed to improve combustion efficiency for better power delivery.

Pros:
– Industry-leading brand quality ensures reliability and performance.
– Excellent resistance to carbon fouling, keeping the tip clean longer.
– Noticeable improvements in acceleration responsiveness.

Cons:
– Requires careful checking of the gap before installation, unlike some pre-gapped options.

Best for: Enthusiasts and drivers who prioritize maximum engine efficiency and trust a globally recognized OE brand.

Expert Opinion: NGK Iridium IX plugs consistently outperform many competitors in ignitability tests. For the 2012 Altima, these provide the best combination of reliable starting and sustained performance over tens of thousands of miles.

Set of 4 Ignition Coil Pack and Spark Plugs Fits for 2007 2008 2009 2010 2011 2012 2013 Nissan Altima Versa Sentra Rogue Cube NV200 2.5 1.8 1.6 2.0 L4 Spark Plugs Coil Packs Replaces# UF549 & 9029

If your 2012 Altima is high mileage, you might be dealing with failing ignition coils alongside worn-out spark plugs. This comprehensive kit provides both, offering fantastic value and addressing potential misfires from two sources simultaneously. The components are built to achieve or exceed OE specifications, utilizing highly conductive copper wire in the coils to ensure strong, consistent voltage delivery needed for powerful combustion.

Key features that stand out:

• Complete Kit: Includes 4 spark plugs (9029 type) and 4 ignition coils (UF549).
• Quality Construction: Coils use high dielectric performance epoxy for long service life.
• Performance Boost: Advertised to upgrade 15% more energy than standard OE coils, potentially improving engine smoothness.

Pros:
– Excellent value proposition for replacing both plugs and coils at once.
– Addresses multiple potential causes of misfires and poor performance.
– Easy direct OEM design installation.

Cons:
– The longevity of the included non-branded spark plugs might not match premium NGK or Denso plugs.

Best for: Owners addressing a significant misfire issue or performing high-mileage maintenance where coil replacement is also recommended.

Expert Opinion: When replacing ignition coils, it’s always smart practice to replace the plugs too. This package offers a convenient and cost-effective way to refresh the entire ignition system, providing a substantial improvement in starting and running performance.

9029 Double Iridium Spark Plug Compatible with 2007-2019 Nissan Altima Versa Sentra Rogue Cube NV200 Pathfinder Infiniti FX50 M56 QX60 QX70 DILKAR6A11

The 9029 Double Iridium spark plug is engineered for extreme longevity, claiming an operational life of up to 100,000 kilometers (or more than 60,000 miles). By using iridium on both the center and ground electrodes, the plug maintains its precise gap far longer than traditional single-iridium or platinum plugs. This robust design results in a consistent and stable spark, leading to better fuel economy and reliable cold-start performance, crucial benefits for any Nissan Altima owner.

Key features that stand out:

• Double Iridium Design: Iridium on both electrodes minimizes wear and extends life significantly.
• OE Match: Direct replacement for the DILKAR6A11 reference number.
• Performance: Provides exceptional ignitability for faster starts and quicker acceleration.

Pros:
– Extremely long working life, reducing maintenance frequency.
– Reliable spark consistency throughout the plug’s lifespan.
– Good cold-start performance and smoother running engine guaranteed.

Cons:
– Requires double-checking fitment across the broad range of compatible vehicles listed.

Best for: Drivers who prioritize maximum durability and the longest possible service interval for their ignition components.

Expert Opinion: Double Iridium construction is the top tier for wear resistance. While perhaps overkill for a standard commuter, the advantage is undeniable stability and reliability as the mileage piles up.

TAUTOY 9029 DILKAR6A11 Spark Plugs Double Iridium 4PCS For Nissan Altima 2007-2016,Cube 2009-2014,NV200 2013-2014,Rogue 2008-2016,Sentra 2007-2019,Versa 2007-2011,Replace # 586141316 9091901281

TAUTOY offers another competitive set of Double Iridium spark plugs that are specifically tuned to replace the Altima’s DILKAR6A11 OEM plugs. These are manufactured in TS16949 certified facilities, meaning they adhere to strict automotive quality control standards, ensuring you get a dependable component. Their focus on superior oxidation resistance means the plugs can handle high temperatures and varied driving conditions without premature peeling or deterioration, maintaining consistent performance across the full spectrum of engine operation.

Key features that stand out:

• Quality Certifications: Manufactured in TS16949 facilities, tested for function and leakage.
• Durability Focus: Engineered for superior oxidation resistance and anti-peeling properties.
• Direct Replacement: Matches several crucial OEM part numbers, guaranteeing fit.

Pros:
– Strong focus on quality control and manufacturing standards.
– Designed to handle extreme heat without degradation.
– Reliable double iridium construction for long life.

Cons:
– Less established brand recognition compared to NGK or Denso may concern some buyers.

Best for: Budget-conscious buyers who still demand the premium longevity and performance of a Double Iridium plug.

Expert Opinion: These plugs offer the technical benefits of double iridium at a competitive price point. For the 2012 Altima, they provide reliable ignitability and the robust structure necessary for 100k-mile replacement intervals.

Marsram Ignition Coil Pack UF549 and Spark Plug 9029 Fits for 2007-2013 Nissan Altima Versa Sentra Rogue Cub NV200, 2014-2017 Infiniti QX60 M56 Q70 FX50, 2.5L 1.8L 1.6L 2.0L 5.0L 5.6L L4, Set Of 4

Similar to the LCWRGS kit, Marsram provides a complete ignition overhaul package featuring UF549 coils and 9029 Double Iridium spark plugs. The coils are constructed with high-strength engineering plastic and high-conductivity copper for longevity and improved ignition speed. What makes these plugs stand out is the emphasis on complete and efficient combustion provided by their advanced double iridium electrodes, promising power delivery that feels “as powerful as a new car.”

Key features that stand out:

• Premium Materials: Coils use epoxy resin exterior and high-conductivity copper interior.
• Double Iridium Plugs: Provides greater combustibility and spark efficiency.
• Corrosion Resistance: Electrodes are designed to minimize spark gap growth over time.

Pros:
– Complete kit addresses aging coils and plugs simultaneously.
– Promises improved performance and faster engine start-up.
– Premium spark plug materials for excellent durability.

Cons:
– The extensive fitment list requires careful verification to ensure compatibility with the specific 2.5L Altima engine.

Best for: The driver looking for a guaranteed performance upgrade by replacing all critical ignition components in one go.

Expert Opinion: The synergy between new, powerful coils and high-quality iridium plugs is the best way to eliminate power hesitation and restore peak efficiency, making this kit an excellent maintenance choice for higher mileage Altimas.

4Pcs UF549 Ignition Coil Pack and 9029 Iridium Spark Plug Compatible with Nissan Altima Versa Sentra Rogue Cube QX60 NV200 2.5L 2.0L 1.8L 1.6L

This is another comprehensive replacement kit focusing on the critical pairing of UF549 ignition coils and 9029 Iridium spark plugs. This set directly addresses the common signs of failing ignition systems—such as hard starts, misfires, and poor fuel economy—by providing high-quality replacement parts. A key selling point for this particular manufacturer is the Lifetime Warranty, giving users peace of mind that their investment is protected against component failure.

Key features that stand out:

• Lifetime Warranty: Strong commitment from the manufacturer against quality issues.
• Problem Solver: Designed to remedy issues like misfires, long crank times, and power loss.
• Coil Replace Part Numbers: Extensive cross-reference list guarantees fit for the UF-549 coil system.

Pros:
– The included lifetime warranty is a major benefit for buyers.
– Conveniently replaces both coils and plugs in one purchase.
– Components are designed to restore lost fuel economy and power.

Cons:
– Long-term coil durability may be variable despite the strong warranty promise.

Best for: Buyers who value the assurance of a lifetime warranty on critical engine components, prioritizing peace of mind alongside performance restoration.

Expert Opinion: While the quality of non-OEM coils can sometimes be inconsistent, a lifetime warranty drastically mitigates the risk. This combination offers excellent value for a full system replacement on the 2012 Nissan Altima.

Comparison Short Insights

When choosing the right spark plugs for your 2012 Nissan Altima, you need to weigh quality against convenience and cost.

If you are only replacing plugs and want the absolute best quality without buying coils, the NGK Iridium IX Spark Plugs generally offer the most trusted performance and best-in-class ignitability. These are often the benchmark for premium spark plug performance.

However, if your primary goal is maximizing longevity and extending the replacement interval, look toward the Double Iridium plugs (like the 9029 options from TAUTOY or the standalone 9029 Double Iridium plug). These designs minimize gap erosion, meaning they hold their performance characteristics for a longer time, often exceeding 80,000 miles.

For high-mileage Altima owners (over 100,000 miles) experiencing misfires, choosing a combined package is crucial. The kits like the Set of 4 Ignition Coil Pack and Spark Plugs or the Marsram Ignition Coil Pack UF549 and Spark Plug 9029 offer the best value by addressing the plugs and the coils simultaneously, often fixing drivability issues immediately. Always ensure the coil replacement part number (UF549) matches your vehicle.

Final Verdict

Making the best choice depends entirely on your vehicle’s current needs and your budget.

The Best Pure Spark Plug Upgrade: If your ignition coils are still running strong and you want a proven performance boost and reliability, go with the 4 pc NGK Iridium IX Spark Plugs. NGK is the most trusted name in this category.

The Best Value for Longevity: For the driver who wants to install high-quality plugs and not worry about them for years, the standalone 9029 Double Iridium Spark Plug offers maximum wear resistance and the longest guaranteed lifespan among the single-component options.

The Most Comprehensive Repair Kit: If you suspect ignition coil failure or are performing major maintenance on a high-mileage 2012 Altima, the 4Pcs UF549 Ignition Coil Pack and 9029 Iridium Spark Plug set offers the best combination of full-system restoration and peace of mind thanks to the Lifetime Warranty.

Best Spark Plugs For 2012 Nissan Altima: Frequently Asked Questions

Q1: What is the difference between single Iridium and double Iridium spark plugs for my 2012 Altima?

A: Single Iridium plugs have iridium only on the center electrode, while double iridium plugs have iridium on both the center and ground electrodes. Double iridium offers significantly better resistance to wear and gap erosion over time, making them the longest-lasting spark plug option, often reaching 80,000–100,000 miles or more in the Nissan Altima 2.5L engine.

Q2: How often should I replace the spark plugs in my 2012 Nissan Altima?

A: For the Iridium or Double Iridium plugs recommended for your Altima, the replacement interval is typically between 80,000 and 100,000 miles. If you notice signs like a rough idle, hesitation during acceleration, or poor fuel economy, it’s a good idea to inspect or replace them sooner.

Q3: What happens if I use the wrong spark plug gap on my 2.5L Altima?

A: Using the wrong spark plug gap can lead to poor performance. If the gap is too small, the spark may be weak, causing misfires. If it’s too large, the ignition coil might not be able to generate enough voltage to jump the gap, resulting in misfires under load. The factory specification for the 2012 Nissan Altima 2.5L engine usually requires a 0.044-inch gap.

Q4: Are ignition coil pack kits worth the money, or should I just buy the plugs?

A: Coil pack kits (which include both coils and plugs) are excellent value if your Altima is high mileage (over 100k miles) or if you are already experiencing consistent engine misfires (often indicated by a flashing Check Engine Light). Since coils degrade over time and deliver less voltage, replacing both components at once ensures peak ignition system performance.

Q5: Will replacing my old spark plugs really improve my gas mileage?

A: Yes, absolutely. Old, worn-out spark plugs provide a weak or inconsistent spark, leading to incomplete combustion in the cylinder. By installing high-quality plugs like Iridium or Double Iridium, you ensure efficient and complete fuel burn, which directly restores lost power and improves your Altima’s fuel economy.

Q6: What are the main signs that my 2012 Nissan Altima spark plugs are failing?

A: The most common signs of failing spark plugs include difficulty starting the engine, noticeable hesitation or stumbling during acceleration, a rough or shaky idle, and a decrease in engine performance. If the condition is severe, the Check Engine Light will likely illuminate due to cylinder misfires.