Replacing spark plugs with Nissan Qashqai 2.0 with engine MR20DE - a procedure that car owners often put off until the last minute. But in vain! Worn spark plugs not only worsen acceleration dynamics and increase fuel consumption, but can also cause detonation, which over time destroys pistons and valves. In this article we will look at how to choose the right candles for Kashkayawhen to change them, and how to replace them yourself - without the mistakes that 90% of beginners make.

Official regulations Nissan requires replacement of spark plugs every 30,000 km for ordinary nickel and 90,000–100,000 km for iridium. But in practice, these periods may be reduced due to low-quality fuel, aggressive driving style, or oil getting into the combustion chambers. We tested several sets of candles (including the original and analogues) and found which of them last longer and which are just imitation of the brand. You will also find out why After replacing spark plugs on a Qashqai 2.0, the Check Engine light may come on - and how to avoid it.

When to change spark plugs on Nissan Qashqai 2.0: signs of wear

The manufacturer indicates replacement intervals, but the actual service life of the spark plugs depends on operating conditions. For example, if you often drive short distances (less than 5 km) or use gas cylinder equipment (GBO), spark plugs wear out 20–30% faster. Here are the key symptoms that it’s time to change them:

  • ⚡ Engine tripping - especially noticeable at idle or during acceleration. One or more cylinders are operating intermittently.
  • 🛢️ Increased fuel consumption — worn-out spark plugs do not ensure complete combustion of the mixture, so the ECU enriches it, wasting extra gasoline.
  • 🚗 Dips when accelerating — the car “stumbles” when you sharply press the gas, as if someone is holding it.
  • 🔥 Detonation — metallic knocks are heard when under load (for example, when climbing a mountain). This is a sign that the mixture is not igniting properly.
  • 💡 Check Engine - errors P0300 (multiple misfires) or P030X (misfires in a specific cylinder).

If you notice at least two of these signs, do not delay diagnosis. Candles are inexpensive (from 300 to 1,500 rubles per set), and the consequences of their wear will cost many times more. For example, detonation can lead to valve burnout or destruction of piston rings - repairs of this level will cost 50,000–100,000 rubles.

📊 How often do you change the spark plugs on your Qashqai?
  • Every 20–30 thousand km
  • Every 50–60 thousand km
  • Only when problems arise
  • I don't know when I last changed it

Which spark plugs to choose for Qashqai 2.0 (MR20DE): original vs analogues

Original candles for Nissan Qashqai 2.0 supplied by the company NGK - their catalog number 22401-JM01B (set of 4 pieces). These are iridium spark plugs with a thin central electrode, which provide a stable spark and a long service life. However, their price is steep - about 3,000–4,000 rubles per set. Are there any alternatives?

Yes, but not all analogues are equally good. We analyzed owner reviews and test results to rank the best options:

Manufacturer Article Type Service life (thousand km) Price per set (RUB) Features
NGK (original) 22401-JM01B / IFR6T11 Iridium 90–100 3 500–4 000 Thin electrode (0.6 mm), stable operation at low temperatures
Denso IK20TT Iridium 80–90 2 500–3 000 A good alternative to the original, but a little less durable
Bosch FR7DPX Platinum 60–70 1 800–2 200 Budget option, but performs worse at high speeds
Beru Z323 Nickel 20–30 800–1 200 Suitable for temporary replacement, but wears out quickly

⚠️ Attention: Do not buy candles with unsuitable heat number! For Qashqai 2.0 it must be 6 (indicated in the article, for example, IFR6T11, where “6” is the heat number). Spark plugs with a smaller number (for example, 5) overheat and cause detonation, while spark plugs with a larger number (7+) do not self-clean well and quickly become covered with soot.

Also note gap between electrodes. For MR20DE he must be 1.0–1.1 mm. Some “craftsmen” advise reducing the gap for better ignition, but this leads to breakdown of the insulator and failure of the spark plug.

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Before purchasing, check the candles for authenticity: original NGK And Denso there must be a laser code on the insulator and a hologram on the packaging. Counterfeits are often sold in ordinary cardboard boxes without protective elements.

Tools and preparation: what you need for replacement

To replace spark plugs Nissan Qashqai 2.0 You don’t need a professional tool—a basic set is enough. Here's the full list:

  • 🔧 Candle key 16 mm with a rubber bushing (so as not to damage the insulator). A regular head with an extension will also work.
  • 🔩 Socket wrench by 10 mm - to unscrew the ignition coils.
  • 🧲 Magnetic screwdriver or tweezers - to carefully remove candles from wells.
  • 🧴 Dielectric grease (optional) - for processing coil tips.
  • 🧹 Compressor or vacuum cleaner - to remove dust from spark plug wells before work.
  • 🔋 Multimeter (optional) - to check the resistance of the ignition coils.

⚠️ Attention: Never start work on a hot engine! The metal expands when heated, and you risk stripping the threads in the cylinder head. Allow the engine to cool for at least 2-3 hours. Also make sure the battery is fully charged - low current may cause a misfire after replacement.

If you plan to test the ignition coils, remember: their resistance must be within the range 5–10 kOhm (between pins) and 0.5–1.5 Ohm (on the primary winding). Deviations indicate a malfunction.

Disconnect the negative terminal of the battery|Clear the area around the spark plug wells from dirt|Check that all tools are present|Prepare new spark plugs (check the gap)|Take a photograph of the location of the high-voltage wires (if you remove them)-->

Step-by-step instructions: how to change spark plugs on a Qashqai 2.0

The process of replacing spark plugs Nissan Qashqai 2.0 takes about 1–1.5 hours if done carefully. The main thing is to take your time and follow the algorithm:

  1. Removing the ignition coils

    Open the hood and remove the plastic engine cover (it is secured with 4 latches). Then disconnect the connectors from the ignition coils (press the lock and pull up). After this, unscrew the bolts securing the coils with a 10 mm wrench and carefully remove them. Don't pull the wires! - it can damage them.

  2. Cleaning spark plug wells

    Before unscrewing the spark plugs, be sure to remove dust and dirt from the wells using a compressor or vacuum cleaner. If this is not done, debris will enter the cylinders and damage the pistons. You can use a clean brush, but not cotton swabs - they leave fibers.

  3. Unscrewing old spark plugs

    Place a 16mm spark plug wrench on the spark plug and carefully unscrew it counterclockwise. If the spark plug is stuck, do not use excessive force - it is better to treat the thread with a penetrating lubricant (for example, WD-40) and wait 10–15 minutes. Never use a percussion instrument! - this is guaranteed to break the thread.

  4. Installing new spark plugs

    Before installation, check the gap on the new spark plugs (should be 1.0–1.1 mm). Screw them in by hand, without a key, so as not to distort the threads. Then tighten firmly 20–25 Nm (if you don't have a torque wrench, tighten all the way + 1/4 turn).

  5. Reassemble in reverse order

    Reinstall the ignition coils, secure them with bolts and connect the connectors. Make sure all connections are tight - poor connections can cause misfires. Finally, put the plastic engine cover back in place.

After replacement, start the engine and check its operation at idle and during acceleration. If vibrations occur or the Check Engine, this means that one of the spark plugs is installed incorrectly or there is a problem with the coil.

What to do if a candle breaks off in a well?

If the spark plug breaks when unscrewing and part of the thread remains inside, do not panic. You will need a special spark plug extractor (available at auto stores). Carefully screw it into the piece counterclockwise, then remove the rest. If the thread in the block head is damaged, you will need to cut a new thread or install a screw.

Common mistakes when replacing spark plugs and how to avoid them

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

  • 🔧 Re-upholstery of candles — excessive tightening force deforms the threads in the aluminum block head. Consequences: cracks, compression leaks, expensive repairs.
  • 🧹 Dirt in the cylinders — if the wells are not cleaned before replacement, sand and dust enter the combustion chamber and scratch the cylinder bore.
  • ⚡ Incorrect clearance - too large a gap leads to misfire, too small - to a weak spark and carbon deposits.
  • 🔋 Ignoring coils - if the ignition coil is faulty, new spark plugs will quickly fail. Always check the coil resistance before replacing.
  • 🛢️ Using thread lubricant - some “masters” lubricate the candle threads with graphite or copper paste. This leads to sticking and makes future replacement difficult.

⚠️ Attention: If after replacing the spark plugs the engine begins to run worse (vibrations appear, fuel consumption increases), check:

  1. Correct connection of high-voltage wires (if they were removed).
  2. Condition of the ignition coils (are there any cracks on the insulator).
  3. Tightening the spark plugs (undertightened spark plugs cause overheating).

If the problem persists, one of the spark plugs may be defective. In this case, you will have to unscrew all the spark plugs and check them on a special stand (or replace them with known good ones).

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The most dangerous mistake is ignoring the code P0300 after replacing spark plugs. It can indicate not only low-quality spark plugs, but also a breakdown of high-voltage wires or faulty coils. Diagnose the cause immediately, otherwise you risk ruining the catalyst.

What happens if you don't change spark plugs on time?

Many owners Nissan Qashqai 2.0 they neglect replacing spark plugs, considering it a “trifle”. However, the consequences can be catastrophic:

  • 🔥 Detonation - uncontrolled ignition of the fuel mixture, which destroys pistons and valves. Symptoms: metallic knocking under load, loss of power.
  • 🛢️ Increased oil consumption — worn spark plugs lead to incomplete combustion of fuel, which increases the load on the oil scraper rings. Over time this leads to maslozhora (more than 1 liter per 1,000 km).
  • 🚗 Catalyst failure — unburnt fuel burns out in the outlet, overheating the catalyst honeycomb. Repairing or replacing the catalyst will cost 20,000–50,000 rubles.
  • ⚡ Electronics problems - misfires cause voltage surges that can damage ECU or sensors.

For example, in our practice there was a case when a client ignored replacing spark plugs at 80,000 km. As a result, detonation destroyed the partition between the rings on the third piston, and the engine required a major overhaul (cost: 120,000 rubles). And it all started with a banal triple trip!

One more nuance: if you use gas cylinder equipment (GBO), spark plugs wear out faster due to the higher combustion temperature of the gas. In this case it is recommended:

  • Reduce replacement interval to 20,000 km for nickel spark plugs.
  • Use iridium or platinum spark plugs with a higher heat rating (for example, IFR7T11 instead of IFR6T11).
  • Check the gap regularly - it can increase faster on gas.

FAQ: answers to frequently asked questions

Is it possible to change spark plugs one at a time, or only as a set?

It's better to change all four candles at the same time. If you replace only one, the difference in wear will lead to uneven operation of the cylinders. However, in emergency cases (for example, if a spark plug fails on the road), it is allowed to replace one spark plug - but only with a similar one in terms of parameters.

Why did the Check Engine light come on after replacing the spark plugs?

The most common reasons:

  1. Incorrectly installed spark plug (thread is skewed or not tightened enough).
  2. Damaged ignition coil (cracked insulator).
  3. The new spark plug is defective (check the gap and resistance).
  4. Debris entering the cylinder during replacement.

Treat the error to the scanner (e.g. ELM327) and follow the code. If the error P030X, check the spark plug and coil in the problem cylinder.

Which spark plugs are better - iridium or platinum?

For Qashqai 2.0 optimal iridium spark plugs (NGK IFR6T11 or Denso IK20TT). They last longer (up to 100,000 km), provide a stable spark and perform better at low temperatures. Platinum candles (Bosch FR7DPX) are cheaper, but their service life is shorter (60–70 thousand km), and they are less able to withstand high loads.

Do I need to lubricate the spark plug threads before installation?

No! Grease on the threads causes the spark plugs to stick and complicates their future replacement. Exception - copper paste, but it is only used on older engines with cast iron heads. On Qashqai 2.0 (aluminum head) no lubrication required.

Is it possible to drive with a stalling engine due to spark plugs?

Short term - possible, but no more than 100–200 km. Long-term driving with misfires leads to:

  • Overheating of the catalyst (risk of melting).
  • Increased wear of the piston group.
  • Damage to lambda probes.

If a spark plug fails on the road, replace it temporarily (even with a used one, but it works) and carry out a complete replacement as soon as possible.