Replacing spark plugs on a Nissan Qashqai J11 2.0: detailed instructions with photos

Replacing spark plugs with Nissan Qashqai J11 with engine 2.0 MR20DD - a procedure that many owners prefer to do on their own. And for good reason: with the right approach, it takes no more than an hour, saving 3-5 thousand rubles on service costs. But there are nuances here: from the choice original candles until the tightening torque is observed to avoid damage to the threads in the aluminum cylinder head.

In this article you will find exact catalog numbers of spark plugs for J11 2.0 (2014–2021), a list of necessary tools, as well as step-by-step instructions with photos and videos. We will look at why it is important to change spark plugs strictly according to the regulations (every 30 thousand km for iridium ones), how to recognize wear by appearance and what to do if the spark plug is “stuck” to the well. Let us separately dwell on common errors that lead to misfires or damage to the coils.

When to change spark plugs on a Nissan Qashqai J11 2.0: regulations and signs of wear

The manufacturer recommends replacing spark plugs with Qashqai J11 with engine MR20DD every 30,000 km mileage - this applies to original iridium spark plugs NGK ILZFR6J-11GS (catalog number 22401-JK01B). For conventional nickel spark plugs, the interval is reduced to 15–20 thousand km, but it is not advisable to install them: the difference in price is minimal, and the service life of iridium spark plugs is 2–3 times higher.

However, you cannot focus only on mileage. Signs that spark plugs need replacing immediately:

• 🔥 Engine tripping at idle or under load (especially noticeable during acceleration).
• ⚡ Power dips when you sharply press the gas, the car “jerks.”
• 🚗 Increased fuel consumption (more than 10–12 l/100 km in the city with working sensors).
• 🔧 Difficulty starting engine “cold” (more than 2-3 seconds of cranking with the starter).
• 💨 Black or gray soot on the electrodes (visible upon visual inspection).

If you ignore these symptoms, the consequences will be serious: from damage to ignition coils (the price of one is from 4 thousand rubles) to engine detonation and repair of the piston group. The wear of spark plugs is especially critical for MR20DD, where high compression ratios and direct injection system DIG-S have strict requirements for spark quality.

⚠️ Attention: On Qashqai J11 with a mileage of more than 100 thousand km, when replacing spark plugs, be sure to check the condition o-rings on the valve cover. Their wear leads to air leaks and false misfire errors (code P0300).

Which candles to choose: original vs analogues, articles and fakes

Original candles for Nissan Qashqai J11 2.0 supplied by the company NGK under the article 22401-JK01B (or 22401-JK00B for earlier versions). These are iridium spark plugs with a thin central electrode (0.6 mm), designed for high system voltage DIG-S. Their direct analogues:

Manufacturer	Article	Price (for 1 piece), rub.	Features
NGK	ILZFR6J-11GS	800–1 200	Original, iridium, 1.1 mm gap
Denso	SXU22HCR11S	750–1 100	Analogue, iridium, interchangeable with NGK
Bosch	0 242 236 666	600–900	Iridium, but there are fakes
Champion	OE201/T10	500–700	Budget option, nickel

When choosing analogues, pay attention to gap between electrodes - he must be 1.1 mm (for MR20DD with direct injection). Plugs with a gap of 0.8–0.9 mm, intended for naturally aspirated engines, will lead to misfires and an error P0300.

How to distinguish an original from a fake:

• 🔍 On the package NGK must be hologram sticker with serial number.
• 📦 In the box - instructions in Japanese (even for the European market).
• 🔧 Logo engraved on the candle NGK and labeling ILZFR6J-11GS (letters and numbers are clear, without blurred edges).
• 💡 Central electrode - thin (0.6 mm) and has a characteristic silvery iridium tint.

⚠️ Attention: Fake candles Bosch And Denso often sold with a gap of 0.8 mm instead of the required 1.1 mm. Check the gap micrometer or with a feeler gauge before installation!

Tools and preparation: what you need for replacement

To replace spark plugs Qashqai J11 2.0 don't need a professional tool, but there are several mandatory positions:

Spark plugs (4 pcs.) with a gap of 1.1 mm

10 mm socket wrench (for removing coils)

14 mm spark plug wrench with magnetic tip

Torque wrench (optional but recommended)

Flat blade screwdriver (for prying up the spool clamps)

Compressor or compressed air cylinder (for cleaning wells)

Dielectric grease (eg Liqui Moly Keramik-Spray)

Medical syringe (to remove oil from wells if there is a leak)

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Pay special attention candle key. On Qashqai J11 candles are recessed in deep wells, therefore:

• 🔧 Use extended key (at least 15 cm) with magnetic or rubber tipso that the candle does not fall into the well.
• 🛠️ Avoid universal “ratchet” wrenches - they often break the edges on the spark plugs.
• 🧲 If the key does not have a magnet, put it on it piece of rubber hose (diameter 14 mm) so that the spark plug “sticks” when unscrewing.

Before starting work necessarily:

1. Allow the engine to cool (cylinder head temperature should not exceed 40°C, otherwise there is a risk of damage to the threads).
2. Disconnect the negative terminal of the battery (to avoid short circuit when removing the coils).
3. Clean the area around the spark plug wells from dirt (debris getting into the cylinder = engine repair).

Step-by-step instructions: how to change spark plugs on a Qashqai J11 2.0

The process of replacing spark plugs Nissan Qashqai J11 with engine MR20DD takes about 40–60 minutes. The main thing is to be consistent and not to use excessive force when unscrewing. Here are the detailed instructions:

Step 1. Removing the decorative engine cover

Unscrew the 4 plastic cover latches (turn them counterclockwise 90°) and remove it. Under the cover you will see 4 ignition coils with wires.

Step 2: Disconnecting the Coils

Each reel has a locking clip. Pry it up with a flathead screwdriver and pull it up. Then disconnect the power connector (press the plastic tab and pull it out). Don't pull the wires! - this may damage the contacts.

Step 3. Unscrewing the coils

Using a 10 mm socket wrench, unscrew the coil mounting bolt (the tightening torque for reassembly is 8–10 Nm). Carefully remove the spool by rocking it from side to side. If the coil gets stuck, do not use force - spray WD-40 and wait 5 minutes.

Step 4. Cleaning the spark plug wells

Before unscrewing the spark plugs necessarily Remove dirt from wells with compressed air or a brush. If debris gets into the well, it will end up in the cylinder, which will lead to scoring on the walls.

Step 5. Unscrewing old spark plugs

Insert the spark plug wrench into the well and carefully unscrew the spark plug counterclockwise. If the candle does not budge:

• 🔧 Check that the key sits straight (distortion will lead to the edges breaking).
• 💦 Add penetrating lubricant and wait 10 minutes.
• 🔨 If the candle is “stuck”, use percussion instrument (for example, put a short wrench on the key and lightly hit it with a hammer).

Step 6. Installing new spark plugs

Before installation, check the gap on new spark plugs (should be 1.1 mm). Apply a thin layer dielectric grease onto the thread (this will prevent sticking in the future). Screw in the candle by hand all the way, then tighten with a torque wrench to 20–25 Nm. Don't overtighten! — the threads in the aluminum cylinder head are easily broken.

Step 7: Reassemble in reverse order

Place the coils in place, secure with bolts (torque 8–10 Nm) and connect the connectors. Make sure the clip latches click into place. Put on the decorative cover and connect the battery.

Common mistakes and how to avoid them

Even experienced car owners make mistakes when replacing spark plugs. Qashqai J11. Here are the most common and their consequences:

Error	Consequences	How to avoid
Re-upholstery of candles	Thread failure in the cylinder head (repair ~20 thousand rubles)	Use a torque wrench (20–25 Nm)
Installing spark plugs with a gap of 0.8–0.9 mm	Misfire, error P0300	Check the gap with a feeler gauge before installation
Debris getting into spark plug wells	Seizures on cylinder walls	Clean wells with compressed air before unscrewing
Using non-original candles	Reducing the life of ignition coils	Buy only NGK ILZFR6J-11GS or Denso SXU22HCR11S

Another typical problem is coil insulator damage when extracting. If you pull the coil by the wire or use excessive force, you may tear the rubber tip. As a result:

• 🔥 Sparks to ground, which leads to misfires.
• 💥 The reel itself is damaged (the cost of a new one is from 4 thousand rubles).

To avoid this, before removing the spool rotate it from side to sideto “unstick” the rubber seal from the spark plug.

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

If the spark plug breaks off when unscrewing and part of the thread remains in the cylinder head:

1. Do not try to unscrew the remains with a spark plug wrench - this will only make the problem worse.

2. Use candle extractor (For example, Lisle 65600) or drill a hole in the piece and unscrew it with a tap.

3. If you are not sure, take the car to a service center. Attempts on your own can lead to damage to the threads in the cylinder head and costly repairs (including replacing the head).

Checking operation after replacement: diagnostics and adaptation

After replacing the spark plugs, you need to make sure that the engine is running correctly. Here's what to do:

1. Primary diagnosis

• 🔑 Start the engine and listen: there should be smooth sound without vibrations and “crackling”.
• 📉 Check the idle speed - it should be within 650–750 rpm.
• 💨 Make sure not white or black smoke from the exhaust pipe (a sign of incorrect clearance or a damaged spark plug).

2. Check for errors

Connect a diagnostic scanner (for example, ELM327 via the app Torque) and check for errors:

• 🔧 P0300 - random misfires (possibly incorrect gap or defective spark plug).
• 🔥 P0301–P0304 — leaks in a specific cylinder (check the coil and spark plug in this cylinder).
• 💡 P0171/P0174 - lean mixture (may indicate air leakage through a damaged valve cover seal).

3. Engine adaptation

After replacing the ECU spark plugs Qashqai J11 you need to “get used” to the new spark formation parameters. To do this:

1. Start the car and let it idle for 2-3 minutes.
2. Drive 5–10 km with smooth acceleration (up to 3–4 thousand rpm).
3. Avoid sudden accelerations and high loads in the first 50 km.

⚠️ Attention: If after replacing the spark plugs the engine stalls or burns Check Engine, don't ignore the problem! Possible causes: defective spark plug, damaged coil or incorrect tightening torque. Diagnose the malfunction immediately to avoid damage to the catalyst (replacing it will cost 50+ thousand rubles).

FAQ: answers to frequently asked questions

Is it possible to install spark plugs with a gap of 0.9 mm instead of 1.1 mm?

No, this will lead to misfires. Engine MR20DD with direct injection DIG-S requires a more powerful spark, so the gap should be 1.1 mm. Spark plugs with a gap of 0.9 mm are suitable for naturally aspirated engines (for example, HR16DE), but not for MR20DD.

What happens if you don’t change spark plugs for more than 50 thousand km?

The consequences are serious:

• 🔥 Damage to ignition coils (the spark begins to “break through” the insulator).
• 💥 Engine knock due to unstable combustion of the mixture (risk of damage to the pistons).
• 🛢️ Increased fuel consumption by 10–15% (the ECU compensates for misfires by enriching the mixture).
• 🚗 Difficulty starting “for cold weather” (especially in winter).

In practice, with a mileage of 60+ thousand km on old spark plugs, replacement is often required all four coils (price - from 16 thousand rubles).

What torque wrench is needed to tighten the spark plugs?

Any key with a range will do 10–50 Nm and in increments of 1 Nm. Popular models:

• Jonnesway T10056 (10–50 Nm, price ~2 thousand rubles).
• KING TONY 19110 (budget option, ~1 thousand rubles).
• Hazet 6000-1CT (professional, ~5 thousand rubles).

If you don't have a torque wrench, tighten the spark plugs. by hand until it stops, then tighten it 1/8 turn (≈45°). Do not use ratchet wrenches!

Is it possible to use spark plugs from Nissan Qashqai J10 on J11?

No, despite the same volume (2.0 l), the engines are different:

• Qashqai J10 equipped MR20DE (atmospheric, spark plug gap 0.8–0.9 mm).
• Qashqai J11 has MR20DD (with direct injection, gap 1.1 mm).

Candles from J10 will not provide a stable spark in J11, which will lead to an error P0300 and tripling.

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

Yes, but only with dielectric grease (For example, Liqui Moly Keramik-Spray or CRC 2-26). This prevents:

• 🔧 Sticking spark plugs to threads (relevant for aluminum cylinder head).
• 💡 Contact corrosion (especially important for regions with a humid climate).

Don't use: graphite lubricant Litol or WD-40 - they conduct current and can cause spark breakdown.