Replacing spark plugs on a Nissan Qashqai: when, how and which ones to choose

Replacing spark plugs with Nissan Qashqai - a procedure that you can perform yourself, saving on service costs. However, not all owners know that the wrong choice of spark plugs or installation errors can lead to misfires, increased fuel consumption and even damage to the coils. In this article we will look at exactly when replacement is required and which spark plugs are suitable for different engines. Qashqai (including popular HR16DE, MR20DE And M9R), and also give step-by-step instructions with photos and video examples.

Feature Nissan Qashqai (especially models J10 And J11) - difficult access to spark plugs on some engines. For example, on MR20DE you will have to remove the intake manifold, and on diesel M9R — disassemble half of the engine compartment. We will describe in detail the nuances for each type of engine so that you do not encounter any surprises. We will also tell you how to check the condition of old spark plugs - this will help diagnose hidden engine problems even before replacement.

When to change spark plugs on a Nissan Qashqai: signs and regulations

The manufacturer recommends replacing spark plugs with Nissan Qashqai every 30–40 thousand km for standard nickel spark plugs and 90–100 thousand km for iridium or platinum. However, these figures are conditional: aggressive driving style, low quality fuel or frequent trips over short distances reduce the service life of spark plugs by 20–30%. Focus on real symptoms:

• 🔥 Engine tripping - especially noticeable at idle or during acceleration.
• ⚡ Deterioration in dynamics: The car reacts worse to the gas pedal and loses power.
• 💨 Increased fuel consumption (10–15% higher than usual).
• 🔊 Unstable startup — the engine starts within 2–3 attempts, especially in cold weather.
• 🚨 Check Engine on the dashboard (error codes P0300–P0304 often indicate problems with spark plugs).

On diesel Qashqai (For example, M9R 1.5 dCi or R9M 1.6 dCi) glow plugs also require attention, but replacing them has other nuances. In this article we will focus on gasoline engines, since they make up the majority in the Russian market.

⚠️ Attention: If oil or thick black carbon deposits are found on the electrodes of the spark plugs, this is a sign of serious problems (wear of oil seals, rich fuel mixture). In this case, replacing the spark plugs only temporarily masks the problem.

Which spark plugs to choose for Nissan Qashqai: original vs analogues

Original candles for Nissan Qashqai supplied by the company NGK, but under the brand Nissan (items start with 22401-...). However, they can be successfully replaced with analogues from NGK, Denso or Bosch, if you follow the parameters:

Engine	Original article	Analogs (NGK/Denso/Bosch)	Gap, mm
HR16DE 1.6	22401-JM00B	NGK IFR6A11 / Denso IK16 / Bosch FR7DPX	1.0–1.1
MR20DE 2.0	22401-4M000	NGK ILFR6A / Denso IT16 / Bosch FR7LPPX	0.8–0.9
M9R 1.5 dCi	Glow plugs 24520-4M000	Beru GN105 / Bosch 0250201015	—

For engines HR16DE And MR20DE optimal choice - iridium spark plugs (For example, NGK IFR6A11 or Denso IK16). They last longer (up to 100 thousand km), are better resistant to carbon deposits and provide stable sparking. Nickel spark plugs are cheaper, but their service life rarely exceeds 30 thousand km when driving on Russian fuel.

When purchasing, check the candles for authenticity: there are many fake brands on the market NGK And Denso. Original candles have:

• 🔍 Clear markings on the case (no blurry symbols).
• 🔧 Smooth carving without burrs.
• 💎 Iridium or platinum central electrode (nickel ones are gray).

Tools and preparation for replacing spark plugs on a Nissan Qashqai

To replace spark plugs Nissan Qashqai A minimum set of tools is required, but there are nuances depending on the engine:

• 🔧 Candle key with magnetic or rubber grip (size 16 mm for HR16DE/MR20DE).
• 🔩 Extension and ratchet - without them, get to the candles on MR20DE almost impossible.
• 🔧 Socket heads 10 mm And 12 mm (for removing ignition coils).
• 🧲 Magnetic screwdriver or tweezers - so as not to drop the candle into the well.
• 🧴 Dielectric grease (For example, Liqui Moly 7656) for processing coil tips.
• 🧹 Compressor or compressed air cylinder - for cleaning spark plug wells from dust.

On the engine MR20DE Additionally you will need:

• 🔧 Socket wrench 14 mm to remove the intake manifold bracket.
• 🔧 Flat head screwdriver to disconnect the pipes.

Before starting work, be sure to:

1. Cool the engine (working on a hot engine can damage the threads).
2. Disconnect the negative terminal of the battery (to avoid short circuit).
3. Clean the area around the spark plug wells from dirt (debris getting into the cylinder can lead to serious repairs).

⚠️ Attention: On Qashqai with engine MR20DE When removing the intake manifold, the plastic clips securing the pipes may burst. Buy spares in advance (Nissan 11945-4M000).

Disconnect battery|

Clean spark plug wells from dirt|

Prepare a new set of candles|

Check availability of all tools|

Take a photo of the location of the pipes (for MR20DE)-->

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

The replacement process differs for engines HR16DE And MR20DE. Below are detailed instructions for each case.

Replacing spark plugs with HR16DE 1.6

On this engine, access to the spark plugs is relatively simple:

1. Remove the decorative plastic engine cover (snap off the 4 clips).
2. Disconnect the connectors from the ignition coils (press the lock and pull up).
3. Unscrew the coil mounting bolts using a wrench 10 mm and remove the coils.
4. Blow out the spark plug wells with compressed air to remove dust.
5. Unscrew the old spark plugs with a spark plug wrench. If the candle is stuck, do not use excessive force - use penetrating lubricant (For example, WD-40) and let stand for 10-15 minutes.
6. Install new spark plugs by screwing them in by hand until it stops, then tighten the key with a torque 20–25 Nm.
7. Apply dielectric grease to the coil tips and reinstall them.

Replacing spark plugs with MR20DE 2.0

Here the process is more complicated due to the need to remove the intake manifold:

1. Remove the air duct by disconnecting the clamps and the mass air flow sensor (MAF) connector.
2. Unscrew the intake manifold bracket (2 bolts on 14 mm).
3. Disconnect the crankcase ventilation system pipes and vacuum hose.
4. Remove the intake manifold by first unscrewing the 6 bolts 12 mm.
5. Once you reach the coils, repeat steps 2–7 from the instructions for HR16DE.

On the MR20DE engine, it is extremely important not to confuse the order in which the coils are connected. The cylinders are numbered from the timing side: cylinder 1 is closest to the belt, cylinder 4 is from the gearbox side.

What to do if the spark plug breaks while unscrewing?

If the spark plug electrode remains in the well, do not try to remove it with a magnet - this may damage the thread. Use a special candle extractor (for example, Lisle 65600). As a last resort, contact a service that uses an endoscope to monitor the process.

Common mistakes when replacing spark plugs and how to avoid them

Even experienced car owners make mistakes that lead to serious consequences. Here are the most common:

• 🔧 Dragging candles - leads to damage to the threads in the block head. Tightening torque for aluminum cylinder heads: 20–25 Nm.
• 🧹 Debris entering the cylinder - always clean wells to removing old candles.
• ⚡ Using inappropriate candles — for example, installing “cold” spark plugs on an engine with a turbine will lead to overheating.
• 🔌 Incorrect installation of coils — if you mix up the connectors, the engine will trip.
• 💧 No dielectric grease — without it, the coils fail faster due to oxidation.

Another typical problem is sticking of candles. If the spark plug does not come out, do not use force! Better use a specialized tool, e.g. spark plug wrench with return hammer or decarbonizer (Liqui Moly Pro-Line Motor Flush).

⚠️ Attention: On Qashqai With a mileage of more than 100 thousand km, the threads in the spark plug wells may be worn out. If the new spark plug screws in too easily, this is a sign of the need for repairs (frill inserts or cylinder head replacement).

Checking operation after replacing spark plugs

After installing new spark plugs, you need to make sure that the engine is running correctly:

1. Connect the battery and start the engine. It should start the first time without failure.
2. Listen to the engine at idle speed - there should be no vibrations or extraneous sounds.
3. Take it for a test drive: accelerate to 60-80 km/h and check for any jerking or loss of power.
4. Connect a diagnostic scanner (for example, ELM327) and check for misfire errors (P0300–P0304).

If after replacing the spark plugs the problem with tripping or fuel consumption remains, the reasons may be:

• 🔌 Faulty ignition coils (check resistance with a multimeter).
• 💧 Dirty nozzles (requires ultrasonic cleaning).
• 🔧 Worn high-voltage wires (on some versions Qashqai they come complete with coils).

For in-depth diagnostics, we recommend checking the compression in the cylinders - low readings (less than 12 bar) indicate wear of the piston group.

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

Is it possible to replace spark plugs on a Qashqai without removing the intake manifold (MR20DE)?

Theoretically yes, but in practice it is extremely inconvenient. Without removing the manifold, you will not be able to properly clean the spark plug wells and risk dropping debris into the cylinders. In addition, access to the coils of the 3rd and 4th cylinders is very limited.

Which brand of spark plugs is better to choose: NGK, Denso or Bosch?

For Nissan Qashqai optimal choice - NGK or Denso, as they are suppliers of conveyor parts. Bosch is also good, but sometimes there are fakes. If your budget allows, take iridium spark plugs - they last 3 times longer than nickel spark plugs.

What to do if the Check Engine light comes on after replacing the spark plugs?

First check if the ignition coils are connected correctly (on MR20DE they are easy to confuse). If the error remains, read the fault code. Most often this P0300 (random omissions) or P030X (misfires in a specific cylinder). The cause may be a faulty coil or injector.

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

No, lubricate the threads not recommended, as this can lead to overtightening and damage to the cylinder head. The exception is if you use copper paste for high-temperature connections (for example, when installing spark plugs on turbocharged engines).

How much does it cost to replace spark plugs on a Qashqai at a service center?

The cost of work depends on the engine:

• HR16DE: 1,500–2,500 rubles (excluding the cost of candles).
• MR20DE: 3,000–5,000 rubles (due to the need to remove the intake manifold).

Replacing it yourself allows you to save up to 70% of this amount.