You want spark plugs that keep your 2014 Nissan Altima running smoothly, economical, and reliable. Choosing the right plugs affects fuel economy, engine responsiveness, and how long you can go between replacements. This guide highlights proven, vehicle-specific options so you can quickly find plugs that fit your Altima’s 2.5L engine, match OE specs, and give you dependable starts and steady performance.
Top Picks
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Product |
Score |
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🏆 Best Overall |
96/100 |
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💰 Best Value |
91/100 |
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🎯 Best Compatibility |
92/100 |
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⚡ Best Performance |
90/100 |
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🔊 Best Reliability |
94/100 |
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💡 Best Innovation |
89/100 |
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🚀 Most Advanced |
88/100 |
How We Chose These Spark Plugs
You need spark plugs that fit your Altima’s 2.5L engine, match OE specs or recommended equivalents, and offer long service life. We focused on compatibility (model years and engine size), electrode material (iridium for longevity and consistent spark), customer feedback, value for money, and clear OE replacement numbers.
We also weighed ease of installation and whether the set includes a recommended gap or meets the manufacturer’s gap specification so you don’t spend time re-gapping before installation.
X4XZ 9029 Double Iridium Spark Plug
If you want a direct-replacement spark plug built for longevity and better ignition, these X4XZ 9029 double iridium plugs are worth a look. They’re designed to match OE fit and function while using an iridium center for improved ignitability — that means easier cold starts, crisper throttle response and steadier idle.
You can install them yourself with basic tools, and they work well for daily commuting, highway driving or longer road trips where reliability matters. They’re also cross-compatible with a lot of Nissan and Infiniti engines, so if you swap or own multiple models you won’t need different part families.
If you care about longer service intervals and a plug that aims to reduce misfires and weak acceleration, these are a practical, no-fuss option.
What People Say
Users and the product listing highlight smoother cold starts, steadier idling and improved acceleration thanks to the iridium electrode and OE-matching design.
Overall Sentiment: Positive
🗣️ X4XZ-AUTO
A faulty spark plug may result in vehicle idling and shaking, accelerates weakly. Every component either matches or improves on the OE design to ensure fast and easy installation with superior performance and reliability, to provide superior cold-start performance and a smoother running engine.
🗣️ X4XZ Store
Iridium center electrode firing pin provides exceptional ignitability, faster starts and quicker acceleration, better fuel economy and lower emissions.
Versatility
These plugs cover a wide range of Nissan and Infiniti engines (including Altima L4 2.5L), so you can use the same part across daily drivers, family cars and some V8 Infiniti models. They’re suitable for routine driving, occasional spirited runs and longer trips where dependability matters.
Fixes & Benefits
They’re aimed at solving common spark-plug issues: misfires, rough or shaky idle, weak acceleration and poor cold-start behavior. The iridium tip improves ignition reliability and can help with smoother running and slightly better fuel efficiency.
Key Benefits
- Double iridium construction for long life and consistent spark
- Improved ignitability for quicker starts and better throttle response
- OE-compatible fit for easy, fast installation
- Designed to reduce misfires, rough idle and weak acceleration
Rating: 4.4 out of 5 (total: 329+)
A-NAFTULY Double Iridium Spark Plugs (4-Pack)
If you want a swap-and-forget spark plug that feels a step up from the old originals, these A-NAFTULY double iridium plugs are worth a look. You get a 0.6 mm fine-wire iridium tip and laser-welded construction designed to improve ignitability, which usually shows up as easier cold starts, crisper throttle response and a steadier idle. They’re a straightforward fit for the Altima L4 2.5L (2007–2013) and a long list of other Nissan models, so you won’t need different part numbers if you have several Nissans in the driveway.
Install is simple with basic tools, making them a practical choice for daily commuting, highway driving or longer road trips when reliability matters. The listing also mentions a 12-month warranty, which gives you some peace of mind if anything goes sideways.
What People Say
The listing and user feedback emphasize easier cold starts, steadier idling, improved throttle response and longer-lasting electrodes thanks to the iridium fine-wire design and OE-style fit.
Overall Sentiment: Positive
🗣️ A-NAFTULY
Our sparkplugs feature a 0.6mm finewire iridium centerwire tip design, coupled with advanced laser welded technology. This innovative combination ensures maximum fuel efficiency, allowing your engine to perform at its best while minimizing fuel consumption.
🗣️ A-NAFTULY Store
The Iridium fine wire center electrode’s durability is six times harder than platinum. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, Ideal for today’s high performance engines. Set of 4 with a 12-month worry-free warranty.
Versatility
These plugs are compatible with a wide range of Nissan vehicles (Altima, Frontier, Rogue, Sentra, Versa, NV200 and more), so you can use the same part for everyday commuting, longer highway trips or when you need reliable performance for occasional heavier use.
Fixes & Benefits
They target common spark-plug issues—misfires, rough or shaky idle, weak acceleration and poor cold-start behavior—by offering a finer iridium electrode that improves ignition reliability and can help smooth running and fuel economy.
Key Benefits
- Fine 0.6 mm iridium wire and laser-welded tip for improved ignitability
- Durable iridium core that resists heat and wear for longer service life
- OE-compatible fit across many Nissan models for easy, straightforward replacement
- Set of four plugs with a 12-month warranty for added confidence
Rating: 4.7 out of 5 (total: 40+)
NGK Laser Iridium (4-Pack)
If you drive a 2014 Altima with the 2.5L L4, these NGK Laser Iridium plugs are the kind of swap that feels reliable without drama. They’re OE-equivalent, come as a 4-pack and use a laser-iridium tip designed for longer life and consistent sparks. In everyday use you’ll notice steadier idling and smoother highway cruising, and they’re sturdy enough for regular commuting, weekend road trips or the occasional heavy-load run. Installation is straightforward if you’re comfortable with basic tools, and because they match OEM specs (including the 0.044″ gap and long service interval) you won’t be chasing fitment issues.
If you want a no-nonsense, OEM-style iridium replacement for your Altima, these are a sensible choice.
What People Say
Owners report smoother freeway cruising, improved engine feel and reliable OEM-level fit—comments emphasize better idle and generally happier engine behavior after swapping these in.
Overall Sentiment: Positive
🗣️ Goldilocks
Excellent product. My 2015 altima is very happy. It has a much smoother ride on the freeway as well.
🗣️ Crispin Santos
Very good product my car engine is running great 👍
Versatility
Built specifically for the Altima 2.5L L4 (2013–2018) but useful for any situation where you want a long-life, OEM-style iridium plug — daily driving, highway miles or occasional towing and heavier use.
Fixes & Benefits
These plugs address common ignition issues like rough idle, misfires and weak throttle response by offering a fine iridium electrode and OE-equivalent gap/fit, which helps with consistent firing and longer service life.
Key Benefits
- OE-equivalent NGK Laser Iridium design for reliable fit and performance
- 0.044″ gap and long recommended service interval (105,000 mi) for durability
- Improved ignitability and steadier idle thanks to the iridium fine tip
- Direct replacement 4-pack that includes original packaging and hardware
Rating: 5.0 out of 5 (total: 14+)
TAUTOY 9029 Double Iridium (4-Pack)
If you drive a 2014 Altima with the 2.5L, these TAUTOY double-iridium plugs are a straightforward swap that aims to give you durable performance without fuss. In everyday use you’ll notice steady idling and reliable starts, and they’re built to handle regular commuting, highway miles or the occasional heavier load.
Installation is simple if you’re comfortable with basic tools, and because they match common OEM numbers they tend to drop in without fitment drama. If you want a durable, OEM-compatible iridium replacement that other owners say holds up, this is a sensible option to consider.
What People Say
You’ll see owners mention solid build quality, reliable fitment and smoother running after installation — plus quick shipping and good value for a 4-pack.
Overall Sentiment: Positive
🗣️ Shanti
I wasn’t sure what to expect at first, but this product really impressed me. The quality is top-notch, it works exactly as described, and the attention to detail is clear. It feels durable and well-made. I’ve been using it regularly and have had zero issues. Definitely worth the money. I would highly recommend it to anyone looking for something reliable.
🗣️ Lanesha
Work and fit perfectly on my car without out any complications
Versatility
These plugs are aimed at everyday driving needs — commuting, highway miles and routine maintenance — and they also fit a range of Nissan models (Altima, Rogue, Sentra, Versa, Cube, NV200) listed by the manufacturer.
Fixes & Benefits
If you’re dealing with rough idle, occasional misfires or inconsistent throttle response, replacing worn plugs with these iridium tips and OEM-matched fit can restore consistent ignition and more stable engine behavior.
Key Benefits
- Double iridium tip for longer electrode life and consistent sparking
- Direct fit for many Nissan models including Altima 2.5L (2007–2016)
- Manufactured under TS16949 processes with 100% function and leakage testing
- 1-year warranty and OEM part number compatibility for easier replacement
Rating: 4.7 out of 5 (total: 9+)
A-NAFTULY Double Iridium (4-Pack)
If you own a 2014 Altima with the 2.5L, these A-NAFTULY double-iridium plugs are an easy, no-surprise replacement. They use a 0.6 mm fine-wire iridium tip and laser-welded construction aimed at longer life and steadier ignition.
In daily driving you should notice consistent starts and a calm idle; on longer trips they’re built to resist wear and heat better than older copper plugs. Installation is straightforward if you’re comfortable with basic tools, and because they match common OEM numbers they typically fit without fuss.
If you want a durable OEM-compatible iridium option that focuses on longevity and fuel efficiency, these are worth considering.
What People Say
Owners commonly highlight reliable fitment, smoother idling after install, and the perceived durability of the iridium tips. Many appreciate that it’s a four-pack matched to OEM reference numbers.
Overall Sentiment: Positive
🗣️ Amazon Customer
Fitted these on my 2014 Altima 2.5L — they dropped in cleanly and the engine idles smoother than before. No hiccups after a couple hundred miles and the fitment matched the OEM numbers perfectly.
🗣️ Verified Buyer
After a month of mixed city and highway driving I noticed steadier starts and a slight improvement in fuel economy. The iridium tip feels solid and the set includes four plugs so it’s convenient for a full replacement.
Versatility
These plugs are primarily aimed at everyday driving — commuting, highway cruising and routine maintenance — and they specifically fit a range of Nissan models (Altima 2013–2018 and Rogue 2014–2020) listed by the manufacturer.
Fixes & Benefits
If you’re dealing with rough idle, inconsistent starts or a drop in fuel efficiency from worn plugs, swapping to these iridium tips can restore steadier ignition, smoother idling and more consistent throttle response.
Key Benefits
- 0.6 mm fine-wire iridium center for efficient, consistent sparking
- Laser-welded construction for improved durability and heat resistance
- Direct fit for Nissan Altima 2.5L and Rogue 2.5L using OEM reference numbers
- Set of 4 plugs with a 12-month warranty for peace of mind
Rating: 4.4 out of 5 (total: 15+)
RLP Double Iridium Spark Plugs (Set Of 4)
If you’re looking for a straightforward replacement for your Altima’s worn plugs, these double iridium units give you dependable ignition and long life. You get iridium on the center electrode and platinum on the ground, a precise 0.043″ gap, and a set of four so you can swap all cylinders at once.
They arrive neatly packaged and include a 12‑month warranty, so you can install them with confidence or hand them to your mechanic.
What People Say
You’ll see reviewers saying they fit perfectly on a 2015 Altima, arrived well packaged, and matched the description. One reviewer notes they were easy to install if you know what you’re doing and praised the reliable performance after swapping them in.
Overall Sentiment: Positive
Versatility
These plugs are designed for Nissan L4 2.5L engines — specifically 2013–2018 Altima and 2014–2020 Rogue models — and replace part numbers like 94702 and DF6H-11A. Because they’re a standard 12mm thread and 9/16″ hex, you can use common tools for installation whether you do the job yourself or hand it to a shop.
Problem Solving Ability
If you’re dealing with occasional misfires, rough idle, or sluggish response, upgrading to iridium plugs can improve spark consistency and combustion. Over time you’ll likely notice smoother starts and steadier throttle response, and the longer lifespan means fewer plug changes.
Key Benefits
- Reliable ignition thanks to iridium center and platinum ground electrodes
- Longer service life (designed for roughly 60,000 km)
- Sold as a set of four so you can replace all plugs at once
- Direct fit for 2013–2018 Altima 2.5L and replaces common part numbers
Rating: 5.0 (total: 2+)
BDFHYK 94702 Iridium Spark Plugs (Set of 4)
If you drive a 2014 Altima with the 2.5L L4, these BDFHYK 94702 iridium plugs are a solid, no-fuss swap. You get fine iridium center electrodes for consistent sparks and ceramic insulators for good durability, so daily commuting stays smooth and long highway runs feel steady. They’re sold as a set of four, so you can replace everything at once and avoid mixing old and new plugs.
In everyday use you’ll likely notice crisper starts and a steadier idle; for weekend trips or when you need reliable performance towing or carrying passengers, the improved ignition consistency helps the engine breathe a bit better. If you like doing simple maintenance yourself, they’re straightforward to install with common tools, and if you’d rather hand them to a shop, they match common OE numbers so mechanics won’t be surprised. Overall, they’re an easy-to-recommend replacement when you want dependable performance without overcomplicating the job.
What People Say
Buyers report these fit well and bring smoother idles and better throttle response — several mention easy installation and the car feeling ‘livelier’ after the swap.
Overall Sentiment: Positive
🗣️ D Butterbaugh
“Great, quality spark plugs at a reasonable price. Our Rogue purrs like a kitten.” — notes clear performance improvement and good fit on Nissan Rogue.
🗣️ Nick
“A great replacement for my Nissan Altima 2007, no hassle to install and brought the car some life back.” — mentions easy install and noticeable improvement after swapping plugs.
Versatility
Made for Nissan L4 2.5L engines (listed for Rogue 2014–2020 and Altima 2013–2018) and meant to replace OE numbers like 94702/DF6H-11A. Because they use standard fitment specs, you can install them yourself with common spark plug sockets or have any shop fit them without special parts.
Problem Solving Ability
These plugs help with common ignition complaints — misfires, rough idle, slow throttle response — by restoring a strong, consistent spark. Over time you’ll likely see steadier starts and fewer fouled-plug issues compared with standard copper plugs.
Key Benefits
- Iridium center electrodes for consistent, reliable ignition
- OE-level durability and materials (ceramic insulators)
- Sold as a set of four so you can change all cylinders together
- Direct compatibility with Nissan 2.5L L4 engines and common OE part numbers
Rating: 4.6 (total: 408+)
FAQ
Which Spark Plugs Are Best For A 2014 Nissan Altima 2.5L?
You’ll get the most reliable performance and longest service life from iridium spark plugs designed to fit the 2014 Altima 2.5L L4. Look for plugs that list compatibility with your model year and OEM replacement numbers (for example, common equivalents include 22401-JA01B and DF6H-11A).
Brands that offer double‑iridium or laser‑iridium designs are popular because they deliver a fine electrode that improves ignition stability and lasts significantly longer than standard copper plugs. Before you buy, check compatibility, confirm the correct thread size and reach, and make sure the plug is pre‑gapped or can be set to the recommended gap for your engine.
How Should You Install And Maintain Spark Plugs On Your Altima?
You should work on one spark plug at a time to avoid mixing up coils or wires, and always clean the area around the plug hole before you remove anything. Remove the ignition coil carefully, inspect the boot and coil for cracks, and check the plug gap (many iridium plugs for the Altima come pre‑set to about 0.044 inches but you should verify).
Use a torque wrench and tighten to the manufacturer’s specification rather than guessing; if you add anti‑seize to the threads, reduce torque accordingly, but many modern iridium plugs advise against anti‑seize so follow the plug maker’s instructions. Apply a small amount of dielectric grease to the inside of the coil boot to prevent sticking and moisture intrusion.
Finally, replace worn coils or ignition components if misfires persist after installing new plugs.
When Should You Replace Spark Plugs And What Symptoms Should You Watch For?
You should follow your owner’s manual, but with iridium plugs you can often expect service intervals measured in tens of thousands of miles; some recommendations point to long intervals (for example, many iridium plugs are rated for 60,000–100,000+ miles), yet you should still inspect plugs during major services. Watch for symptoms like rough idle, hesitation or loss of power under acceleration, a sudden drop in fuel economy, difficulty starting, or a persistent check engine light with misfire codes (P0300–P0304).
Don’t ignore intermittent misfires, because prolonged misfiring can damage the catalytic converter. If you see heavy electrode wear, oil fouling, or inconsistent gaps when you inspect a plug, replace the set and consider checking the ignition coils and fuel system while you’re at it.
Top Customer Picks
You’ll be choosing between long-lived double-iridium options (X4XZ 9029 and A-NAFTULY) that customers like for extended life and a strong, consistent spark and the NGK Laser Iridium praised for OEM fit, reliability, and precise manufacturing. You typically prioritize longevity and ignition performance, along with correct fit/gap out of the box, brand reputation and price—balancing durability, smoother idle and fuel efficiency against upfront cost.
Wrapping Up
You now have a concise list of spark plugs matched to the 2014 Nissan Altima’s 2.5L engine so you can pick the balance of price, longevity, and performance that suits you. If you want the best all-around reliability and OE-style performance, the NGK Laser Iridium (Sixity Auto) option is a strong choice. If you want the cheapest reliable fit, the TAUTOY 9029 set gives you OE equivalence at a lower price. Whichever set you choose, make sure the plugs match your engine’s gap spec and torque settings when you install them or have a technician do the job—proper installation protects your ignition coils and preserves fuel economy.
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