Replacing spark plugs on a Nissan Qashqai J11 2.0: a complete guide with photos and videos

Replacing spark plugs with Nissan Qashqai J11 with engine MR20DD 2.0 - a procedure that many owners prefer to perform on their own. And for good reason: with the right approach, the work takes no more than 1.5–2 hours, and the savings on the service amount to 2–3 thousand rubles. However, there are pitfalls here: from choosing the right spark plugs to carefully dismantling ignition coils, which can be easily damaged if handled carelessly.

In this guide we will walk you through the entire process from A to Z: what spark plugs suitable for Kashkaya J11 2014–2021, what tools are needed, how to avoid common mistakes (for example, broken high-voltage wires or damaged threads in the cylinder head) and when exactly replacement is required. We will pay special attention to the nuances of working with aluminum cylinder head, which is sensitive to overheating and mechanical stress.

When to change spark plugs on Nissan Qashqai J11 2.0?

The manufacturer recommends replacing spark plugs every 30,000 km for ordinary nickel spark plugs and 60,000–100,000 km for iridium or platinum. However, these figures are conditional: the actual service life depends on the quality of the fuel, driving style and operating conditions. For example, if you frequently drive short distances (when the engine does not warm up completely) or use low-octane gasoline, the spark plugs may fail after 20,000 km.

Signs that spark plugs need replacing:

• 🔥 Engine tripping - especially noticeable at idle or during acceleration.
• ⚡ Misfires (errors P0300–P0304 to the ECU).
• 🛢️ Increased fuel consumption (10–15% higher than usual).
• 🚗 Poor engine starting, especially in cold weather.
• 💨 Power Loss — the car “does not pull” when overtaking.

If you notice any of these symptoms, do not delay diagnosis. Plugs in poor condition not only worsen performance, but can also lead to engine detonation, which is fraught with serious repairs.

⚠️ Attention: On Qashqai J11 with engine MR20DD are used custom ignition coils for each cylinder. When replacing spark plugs, be sure to check the condition of the coils: cracks on the body or traces of breakdown (black dots) indicate the need to replace them.

Which spark plugs are suitable for Nissan Qashqai J11 2.0?

For Nissan Qashqai J11 with motor MR20DD (2.0 l, 144 hp) spark plugs with the following parameters are suitable:

• 🔧 Thread: M12 × 1.25 (thread length 26.5 mm).
• 🔥 Heat number: 6–7 (for standard engine).
• ⚡ Clearance: 0.8–1.1 mm (optimally 1.0 mm).
• 💎 Electrode material: iridium or platinum (for durability).

Original candles from Nissan have an article number 22401-JK00A (iridium, manufacturer - NGK). However, they can be replaced with analogues from other brands:

Brand	Article	Type	Service life (thousand km)	Approximate price (for 1 piece)
NGK	ILZFR6J-11G	Iridium	100	800–1 200 ₽
Denso	SK20HR11	Iridium	90	700–1 100 ₽
Bosch	0 242 236 566	Platinum	80	600–900 ₽
Brisk	DR15YC-1	Nickel	30	200–350 ₽

We recommend choosing iridium spark plugs NGK ILZFR6J-11G or Denso SK20HR11 — they provide a stable spark, reduce fuel consumption and last 3–4 times longer than nickel ones. Iridium spark plugs are especially relevant for Qashqai J11 with HBO, since gas requires a more powerful spark for ignition.

⚠️ Attention: Do not use spark plugs with a gap of more than 1.1 mm - this can lead to misfires, especially at high speeds. If you buy non-original spark plugs, check the gap with a feeler gauge before installation.

Tools and materials for replacement

To replace spark plugs yourself Nissan Qashqai J11 you will need:

• 🔧 Candle key 14 mm with a magnetic or rubber holder (for example, Hazet 4762-1 or Jonnesway S1410A).
• 🔩 Socket wrench 10 mm for unscrewing the ignition coils.
• 🔧 Extension cord for a key (15–20 cm) - without it it is difficult to get to the candles.
• 🔧 Ratchet handle or a collar.
• 🧲 Magnetic screwdriver or tweezers for removing candles from wells.
• 🧴 Dielectric grease (For example, Liqui Moly Silicone-Fett) for coil contacts.
• 🧹 Compressor or can of compressed air for cleaning spark plug wells.
• 📏 Gap gauge (if you use non-original candles).

Also prepare clean rags And medical alcohol for cleaning contacts. If you plan to check the condition of the coils, take multimeter (to measure resistance).

Step-by-step instructions for replacing spark plugs

The process of replacing spark plugs Qashqai J11 requires care, especially when working with an aluminum block head. Follow the instructions strictly step by step:

1. Preparation. Make sure the engine is cool (working on a hot engine is dangerous - there is a risk of damaging the threads). Open the hood and remove plastic engine cover (it is secured with 4 latches).

2. Removing ignition coils. Disconnect the power connectors from the coils (press the latch and pull up). Then unscrew the coil mounting bolts with a 10 mm wrench. Remove the coils carefully, without jerking - high-voltage wires are fragile!

3. Cleaning spark plug wells. Blow out the wells with compressed air to remove dust and dirt. If there is oil or moisture, use alcohol and a rag. Debris getting into the cylinders can lead to scoring on the walls!

4. Unscrewing old spark plugs. Insert the spark plug wrench and extension into the well and carefully unscrew the spark plug counterclockwise. If the candle “sticks”, do not use excessive force - it is better to use penetrating lubricant (For example, WD-40) and try again in 10–15 minutes.

5. Installing new spark plugs. Screw in the candles manually (without a key!) all the way so as not to damage the thread. Then tighten firmly with a wrench 20–25 Nm (overtightening threatens to break the threads in the aluminum cylinder head).

6. Assembly. Install the ignition coils in place, secure with bolts (tightening torque - 8–10 Nm) and connect the connectors. Make sure the contacts are clean and dry.

After assembly, start the engine and listen to its operation. If you hear a misfire or vibration, check:

• 🔌 Correct connection of the coils (mixed up wires will lead to failures).
• 🔧 Tightening the candles (under-tightened candles can cause overheating).
• 💡 Condition of new spark plugs (defective or improper gap).

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

If the threaded part of the spark plug remains in the cylinder head, do not try to remove it yourself - contact service. To remove the debris, you will need a special extractor and an experienced craftsman, since the aluminum cylinder head Qashqai J11 Easily damaged by unqualified repairs.

Typical 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:

1. Re-upholstery of candles. Aluminum block head MR20DD does not tolerate excessive effort. Maximum tightening torque - 25 Nm. If this value is exceeded, the thread may be torn off, and repairs will cost 15–20 thousand rubles.

2. Debris getting into the cylinders. If the wells are not cleaned before removing the spark plugs, dirt will enter the combustion chamber and may cause scoring on pistons or valve damage.

3. Using unsuitable candles. Plugs with the wrong heat rating or gap will cause detonation, overheating, or misfire. Always check catalog compatibility.

4. Damage to high voltage wires. If you remove the coils carelessly, you can break the wires or damage the insulation. This will lead to test to ground and unstable engine operation.

5. Ignoring the state of the coils. If the coils have cracks or signs of breakdown, they need to be replaced. Otherwise, new spark plugs will quickly fail.

⚠️ Attention: If, after replacing the spark plugs, the instrument panel lights up Check Engineand the scanner shows errors P0300–P0304, the probable cause is an incorrect gap on the spark plugs or a damaged coil. Do not reset errors without eliminating the cause!

How to check the operation of new spark plugs?

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

1. Checking at idle speed. Start the engine and listen to it work. Normal sound is smooth, without vibrations or “tweaking”. The speed should remain stable at 650–750 rpm.

2. Overclocking test. Accelerate the car to 60–80 km/h. If the acceleration is smooth, without jerks, and the engine “responds” to the gas pedal, the spark plugs are working correctly.

3. Diagnostics with a scanner. Connect a diagnostic tool (eg ELM327) and check for misfire errors. Also note long-term fuel correction (parameter LTFT) - it should be within ±5%.

4. Visual inspection. After 100–200 km, unscrew one spark plug and inspect it. The normal color of electrodes is gray-brown. White coating indicates a lean mixture, black - a rich mixture or oil removal.

If after replacing the spark plugs the problems remain (for example, the engine is running rough or fuel consumption has increased), the reasons may be:

• 🔧 Faulty ignition coils (check the resistance with a multimeter).
• 🛢️ Dirty injectors (washing required).
• 🔍 Air leak in the intake manifold.
• 💻 Sensor malfunctions (for example, oxygen sensor or air flow).

Should I change the spark plugs myself or go to a service center?

Replacing spark plugs yourself Nissan Qashqai J11 - a task that is feasible for most car owners, but it requires attentiveness and the availability of high-quality tools. Let's compare the pros and cons of both options:

Criterion	Self-replacement	Replacement in service
Cost	Only the price of candles (1,500–3,000 RUR)	Candles + work (3,000–5,000 RUR)
Time	1.5–2 hours (if you have experience)	30–60 minutes
Quality	Depends on your skills and tool	Labor warranty (usually 1–3 months)
Risks	Damage to threads, coils or wires	Minimal (if you choose a proven service)
Additional benefits	Experience and understanding of vehicle design	Diagnostics of other systems (optional)

We recommend changing the spark plugs yourself if:

• ✅ Do you have special spark plug wrench with magnetic holder.
• ✅ Are you ready to comply tightening torques and handle the reels carefully.
• ✅ Are you confident in choosing candles (check the catalog items).

Contact the service if:

• ❌ You have no experience working with the engine.
• ❌ The candles are “stuck” and do not twist (risk of breaking the candle).
• ❌ After the replacement, errors appeared that you cannot fix on your own.

FAQ: Frequently asked questions about replacing spark plugs on Nissan Qashqai J11 2.0

Can I use spark plugs with a 1.3mm gap instead of the recommended 1.0mm?

No, this will lead to misfires, especially at high speeds. Engine MR20DD sensitive to the gap: too large increases the load on the coils, and too small - worsens the ignition of the mixture. Optimal clearance - 1.0 mm.

What happens if you don’t change spark plugs for more than 100,000 km?

The consequences depend on the condition of the candles:

• 🔥 Overheating due to impaired heat removal (risk of electrodes melting).
• ⚡ Insulator breakdownsleading to misfires.
• 💥 Detonation (explosive combustion of fuel), which destroys pistons and valves.
• 🛢️ Increased fuel consumption by 15–20%.

In practice, candles rarely “die” suddenly; problems usually accumulate gradually. But you shouldn’t ignore them: engine repairs will cost tens of times more than new spark plugs.

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

No, on Qashqai J11 thread lubrication is not required and is even harmful: it can lead to overtightening (due to reduced friction) or oil entering the combustion chamber. The exception is if the candles iridium or platinum with non-stick coating (eg NGK IFR6J-11), then the manufacturer may recommend applying a special lubricant (check the instructions).

Is it possible to drive with one faulty spark plug?

Technically possible, but highly undesirable. One broken candle leads to:

• 🔥 Uneven engine operation (vibrations, tripping).
• 🛢️ Increased fuel consumption by 10–15%.
• 💨 Unburnt fuel entering the catalyst, which reduces its resource.
• 🔧 Increased load on other cylinders, accelerating wear of parts.

If the spark plug fails on the way, try to get to the repair site without sudden acceleration and high speeds.

How often do you need to check the spark plugs if the car is filled with gas (LPG)?

On vehicles with HBO spark plugs operate under more severe conditions: gas requires a higher temperature to ignite, which accelerates wear of the electrodes. Recommendations:

• 🔧 Use only iridium spark plugs (For example, NGK IFR6J-11 or Denso IK20).
• 📅 Check the condition of the candles every 20,000 km.
• 🔥 Reduce the gap to 0.9 mm (for better ignition of gas).
• 💡 Follow heat number — for gas it should be 1–2 units higher than for gasoline.

With the correct selection of spark plugs and regular checking, the service life of a gas engine does not differ from that of a gasoline engine.