Spark plugs for Nissan Almera G15: part numbers, analogues and replacement tips

Replacing spark plugs with Nissan Almera G15 - a procedure that directly affects engine stability, fuel consumption and acceleration dynamics. Owners of this model are often faced with the question: which items are suitable for the original replacement, and which analogues are not inferior in quality? In this article we will analyze not only the serial part numbers, but also the nuances of choosing between iridium, platinum and standard spark plugs, and also tell you how to avoid fakes upon purchase.

Feature Almera G15 with engine K4M (1.6 l) is demanding on the parameters of the spark plugs: an incorrect gap or thermal range can lead to misfires, increased vibration or even damage to the coils. We analyzed catalog data Nissan, reviews from car owners and recommendations from service centers in order to compile an up-to-date list of articles for 2026, taking into account changes in the range of manufacturers.

Original spark plug articles for Almera G15

The manufacturer recommends using candles with the article number 22401-JM00A (or its updated version 22401-JM00B for models after 2017). These parts are manufactured by NGK and are marked as IFR6A11 — iridium spark plugs with a thin central electrode (0.6 mm), optimized for the engine K4M.

Important: original spark plugs Nissan are often supplied in branded packaging with a hologram, but in practice they are the same NGK, only with a markup for the brand. If you want to save money without losing quality, you can buy NGK IFR6A11 directly - they are identical in parameters.

• 🔧 22401-JM00A — original article for models 2013–2016.
• 🔧 22401-JM00B — updated version (since 2017), features improved insulation
• 🔧 NGK IFR6A11 - direct analogue of the original, manufacturer NGK
• 🔧 Denso IK16 - alternative from Densocompatible in parameters

The service life of original spark plugs is 60–80 thousand km, but if you drive aggressively or use low-quality fuel, their service life can be reduced to 40–50 thousand km. It is recommended to check the condition of the spark plugs every 20–30 thousand km, especially if symptoms of a malfunction appear: difficult engine starting, tripping, or increased gasoline consumption.

Analogues of original candles: what to choose?

If original candles are not available or you are looking for a more budget-friendly option, you can consider analogues from trusted brands. The main thing is to observe three key parameters:

1. Electrode type: iridium or platinum (for durability), or nickel (budget option).
2. Gap: must be 1.0–1.1 mm (for Almera G15 with K4M).
3. Heat number: 6 (for standard operating conditions).

Below is a table of compatible analogues indicating their features:

Brand	Article	Type	Gap (mm)	Resource (thousand km)	Notes
NGK	IFR6A11	Iridium	1.1	60–80	Original for Nissan
Denso	IK16	Iridium	1.1	60–70	Analogue with improved insulation
Bosch	FR7DPX	Platinum	1.0	50–60	Budget option with good reviews
Champion	OE201	Nickel	1.1	30–40	For temporary replacement

⚠️ Attention: Candles Bosch FR7DPX have a gap of 1.0 mm, while the original is 1.1 mm. If you choose this option, it is recommended adjust the gap before installation using a feeler gauge. Failure to comply with this rule may result in misfire at high speeds.

When and how often to change spark plugs on Almera G15?

Manufacturer Nissan indicates the spark plug replacement interval for Almera G15 — every 60 thousand km. However, this period is relevant only for ideal conditions: high-quality fuel, a calm driving style and no engine overheating. In the realities of Russian roads and gasoline, the service life of spark plugs can be reduced by 20–30%.

Signs that spark plugs need replacing regardless of mileage:

• 🚗 The engine “troits” (vibration at idle).
• 🔥 Fuel consumption has increased (more than 8–9 l/100 km in the city).
• ⚡ Problems with starting (especially in cold weather).
• 💨 Loss of power (the car accelerates poorly after 3000 rpm).

If you notice any of these symptoms, it is recommended check the condition of the spark plugs visually. To do this:

1. Remove the high-voltage wires (or ignition coils, if individual ones are installed).
2. Unscrew the spark plugs with a special 16 mm wrench.
3. Rate the color of the electrodes:
   • 🟤 Brown or gray - the norm.
   • ⚫ Black soot - rich mixture or oil in the combustion chamber.
   • ⚪ White coating - lean mixture or overheating.

⚠️ Attention: When replacing spark plugs with Almera G15 do not use WD-40 or other lubricants to make unscrewing easier. Liquid entering the combustion chamber can cause water hammer during startup. If the candle is stuck, it is better to contact the service.

Iridium vs platinum vs nickel: which is better for Almera G15?

The choice of electrode material directly affects the service life and performance of spark plugs. Let's look at the pros and cons of each type for the engine. K4M:

Iridium spark plugs

✅ Pros:

• 🔥 They last longer (up to 100 thousand km under ideal conditions).
• 🚀 Better sparking due to a thin electrode (0.4–0.6 mm).
• ⚡ Stable operation under high loads.

❌ Cons: High price (from 800 rubles per piece).

Platinum candles

✅ Pros:

• 💰 Cheaper than iridium ones (from 500 rubles).
• 🔄 Resource 50–60 thousand km.

❌ Cons: They self-clean worse at low temperatures.

Nickel spark plugs

✅ Pros: Low cost (from 200 rubles).

❌ Cons:

• ⏳ Service life is only 20–30 thousand km.
• 🔥 The spark is worse, especially on worn-out engines.

For Almera G15 with a mileage of more than 100 thousand km, iridium spark plugs are recommended - they compensate for engine wear and reduce the risk of misfires. Platinum ones are suitable for moderate use, while nickel ones should be considered only as a temporary replacement.

What happens if you install spark plugs with the wrong gap?

If the gap is too large (more than 1.3 mm), the spark will be weak, which will lead to misfire at high speeds. If the gap is too small (less than 0.8 mm), the spark may not penetrate the mixture, especially at low voltage (for example, in winter). In both cases, the engine will operate unstably, and fuel consumption will increase by 10–15%.

How to avoid counterfeits when buying candles?

The auto parts market is flooded with counterfeits, and spark plugs are no exception. Counterfeits not only fail faster, but can also damage the ignition coils or catalyst. Here's how to distinguish the original from the fake:

1. Packing: Original candles NGK or Denso sold in cardboard boxes with a hologram and barcode. Counterfeits often have blurry printing or typos in the article.
2. Marking: On original candles, the product number and brand logo are laser engraved rather than painted.
3. Price: If the candles NGK IFR6A11 sold for less than 600 rubles. per piece, this is a reason to doubt their authenticity.
4. Place of purchase: Buy only from authorized dealers or trusted online stores (for example, Exist.ru, Autodoc).

⚠️ Attention: Candles are especially often counterfeited Denso IK16 — their copies are almost indistinguishable in appearance, but have a thicker electrode (0.8 mm instead of 0.4 mm) and quickly become covered with soot. Before purchasing, check the seller's reviews and request a photo of the packaging.

Step-by-step instructions for replacing spark plugs on Almera G15

Replacing spark plugs with Nissan Almera G15 does not require special skills, but it is important to follow the algorithm to avoid damage. You will need:

• 🔧 16 mm spark plug wrench with extension.
• 🔧 Torque wrench (optional, for precise tightening).
• 🔧 Feeler gauge for checking the gap.
• 🔧 Compressed air or a brush for cleaning wells.

Procedure:

1. Disconnect the negative terminal of the battery (to avoid short circuit).
2. Remove the decorative engine cover (if installed).
3. Disconnect the ignition coil connectors (on Almera G15 they are fastened with 10 mm bolts).
4. Unscrew the bolts securing the coils and carefully remove them. Don't pull the wires!
5. Blow out the wells with compressed air to prevent dirt from getting into the cylinders.
6. Unscrew the old spark plugs with a spark plug wrench. If the candle is stuck, do not use excessive force - it is better to use a decarbonizing agent (for example, Liqui Moly Entferner).
7. Check the gap of the new spark plugs (should be 1.0–1.1 mm).
8. Install new spark plugs by hand tightening them and then tighten them firmly with a torque wrench 20–25 Nm.
9. Reassemble everything in reverse order.

⚠️ Attention: When installing spark plugs do not use sealant or lubricant on threads - this can lead to overtightening and damage to the cylinder head. The exception is candles with a copper gasket (for example, Bosch), where a thin layer of graphite lubricant can be applied.

Common mistakes when replacing spark plugs and how to avoid them

Even experienced car owners sometimes make mistakes that lead to breakdowns. Here are the most common of them:

• 🔧 Re-upholstery of candles - can cause cracks in the block head. Always use a torque wrench.
• 🔧 Dirt getting into the cylinders — before removing the candles, be sure to clean the wells.
• 🔧 Using incompatible candles - for example, with a heat rating of 5 instead of 6. This will lead to detonation.
• 🔧 Ignoring Gap - even new spark plugs may have the wrong gap from the factory.

Another common mistake is replacing only part of the spark plugs. If this is not the first time you are changing spark plugs, never install new parts together with old ones. Different wear of the electrodes will lead to uneven engine operation and increased load on the ignition coils.

If, after replacing the spark plugs, the engine continues to “triple” or lights up on the panel Check Engine, check:

• Correct connection of high-voltage wires (or coils).
• Condition of the ignition coils (if there is a breakdown, the spark may “go” to the housing).
• Compression in the cylinders (low compression also causes misfires).

FAQ: Answers to frequently asked questions

Is it possible to install spark plugs with a gap of 0.8 mm instead of the recommended 1.1 mm?

No, this will lead to a weak spark and misfire, especially at high speeds. For Almera G15 optimal clearance - 1.0–1.1 mm. If you bought spark plugs with a smaller gap (for example, Bosch FR7DPX), it can be carefully adjusted using a special tool.

What is the difference between spark plugs 22401-JM00A and 22401-JM00B?

Version 22401-JM00B has improved insulation and is more resistant to high temperatures. It is recommended for models Almera G15 from 2017, but also suitable for earlier versions. There is no difference in compatibility.

How much do original spark plugs for Almera G15 cost?

Price for original candles 22401-JM00B (or NGK IFR6A11) in 2026 is:

• Official dealer: 1200–1500 rub. per piece.
• Online stores: 800–1000 rub. per piece.

Analogues (Denso IK16, Bosch FR7DPX) will cost less - from 500 to 800 rubles.

Do I need to change the ignition coils along with the spark plugs?

Not necessary if the coils are working properly. However, if there was heavy carbon or oil on the spark plugs, this could damage the coils. You can check them by measuring the resistance of the primary and secondary windings with a multimeter (norm: 0.5–1.0 Ohm and 8–12 kOhm, respectively).

Is it possible to drive with faulty spark plugs?

Technically it is possible, but this will lead to:

• Increased fuel consumption (up to +2 l/100 km).
• Accelerated wear of the catalyst.
• Risk of damage to the ignition coils.

If at least one spark plug fails, it is recommended to replace the entire set.