Replacing spark plugs on a Nissan Qashqai: a complete guide with nuances

Replacing spark plugs with Nissan Qashqai - one of those procedures that many car owners prefer to do on their own. And for good reason: with the right approach, the operation takes no more than 1-2 hours, saving up to 3-5 thousand rubles at a service station. But there are pitfalls here: from incorrect selection of spark plugs to the risk of damaging the threads in the cylinder head.

In this article we will break everything down: which spark plugs are suitable for different engines Kashkaya (including popular HR16DE, MR20DE And M9R), what tool you will need, how to avoid common mistakes and when exactly replacement is required. And let’s also reveal the secret why on diesel versions of the Qashqai J11, glow plugs are changed differently than on gasoline ones, and what will happen if you ignore the regulations.

Which spark plugs are suitable for Nissan Qashqai: choice by engine

First rule: don't skimp on candles. Cheap analogues can cause misfires, increase fuel consumption and even lead to detonation. Original candles from Nissan (article 22401-JM00A or 22401-4M015) cost about 800-1200 rubles apiece, but their service life is up to 100 thousand km. Alternatives from NGK, Denso or Bosch will cost less, but it is important to select them by catalytic number.

Here is the compatibility table for popular engines:

Engine	Type of candles (original)	Analogs (NGK/Denso)	Gap, mm	Resource, thousand km
HR16DE (1.6 l, petrol)	22401-JM00A	NGK IFR6A11 / Denso FK16HR11	1.1	60-80
MR20DE (2.0 l, petrol)	22401-4M015	NGK ILFR6A / Denso IXUH22I	1.0	80-100
M9R (1.5/2.0 l, diesel)	Glow plugs 22401-VJ00A	Beru GN3 / Bosch 0250201065	—	100-120

⚠️ Attention: On Qashqai J10 (2007-2013) with engine MR20DE spark plugs with an increased gap (1.3 mm) were often installed. If you buy analogues, check this parameter with a feeler gauge - an incorrect gap will lead to unstable engine operation at idle.

• 🔧 Suitable for gasoline engines iridium or platinum candles - they last longer than standard nickel ones.
• 🔥 On diesel Qashqai Glow plugs are changed at the first sign of difficult starting in cold weather (even if there are no errors).
• 📏 Check the gap necessarily - even new spark plugs may have deviations.

When to change spark plugs: signs and regulations

Official regulations Nissan requires replacement of spark plugs every 60-100 thousand km depending on the engine type and operating conditions. But in Russian realities these figures are often underestimated:

• 🛣️ Urban cycle (frequent traffic jams, short trips) reduces the life of spark plugs by 20-30%.
• ⛽ Low fuel quality leads to the formation of soot and erosion of electrodes after 40-50 thousand km.
• 🌡️ Engine overheating (for example, due to a faulty thermostat) accelerates the wear of spark plugs by 1.5-2 times.

How do you know when it’s time to change the spark plugs, even if the mileage has not reached the limit?

⚠️ Attention: If detected on candles red plaque (a sign of ferrocene additives in fuel), they need to be replaced immediately - this deposit conducts current and causes misfires.

• ⚡ Engine tripping (especially when cold or during acceleration).
• 🚗 Increased fuel consumption (more than 1-1.5 liters per 100 km).
• 🔊 Popping sounds in the exhaust system - a sign that the fuel is burning out already in the outlet.
• 💡 Check Engine with errors P0300 (multiple omissions) or P030X (misfires in a specific cylinder).

Tools and preparation: what you need for work

To replace spark plugs Nissan Qashqai You don’t need a professional tool, but there are a few nuances:

• 🔧 Candle key with a magnetic grip (preferably with a rubber seal so as not to damage the ceramics). For HR16DE suitable size 16 mm, for MR20DE — 14 mm.
• 🔩 Extension and ratchet — without them it will be difficult to get to the spark plugs in the 4th cylinder.
• 🧲 Torque wrench (optional, but recommended) - spark plug tightening torque 20-25 Nm.
• 🧴 Penetrating lubricant (For example, WD-40) - if the spark plugs have not been unscrewed for a long time, the threads may become stuck.
• 🧹 Compressor or vacuum cleaner — to remove dirt from the spark plug wells (debris getting into the cylinder = major repairs!).

⚠️ Attention: On Qashqai J11 (2014-2021) with engine MR20DD (direct injection) spark plugs are located under the intake manifold. To access them you will have to remove decorative cover and disconnect vacuum hoses — you can’t do without a repair manual here!

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

The process of replacing spark plugs on gasoline Qashqai similar for most engines, but there are differences in access. Let's consider a universal algorithm using an example HR16DE (1.6 l):

1. Removing the decorative cover. On Qashqai J10 It is plastic, fastened with 4 clips. On J11 the cover can be aluminum - you will need keys here Torx T30.

2. Well cleaning. Blow with compressed air or vacuum the area around the candles. Never use metal brushes - chips getting into the cylinder will lead to scoring.

3. Disconnecting the ignition coils. On HR16DE And MR20DE coils are secured with bolts 10 mm. Gently pull the reel up - if it does not give in, do not apply force (you may tear the rubber tip).

4. Unscrewing old spark plugs. Insert the spark plug wrench with extension and turn counterclockwise. If the candle does not budge, apply WD-40 and wait 10-15 minutes. Do not try to unscrew the spark plug with a jerk. - risk of breaking ceramics.

5. Installing new spark plugs. Screw in the candles by hand all the way, then tighten with a torque wrench (torque - 20 Nm). Without a dynamometer: tighten 1/4 turn beyond the "stop".

6. Reassemble in reverse order. Make sure that the high voltage wires (if any) are connected to the correct coils - mixing up the order will result in unstable engine operation.

📌 On diesel Qashqai the process is different: the glow plugs are unscrewed only on a cold engine (risk of breakage when heated). To replace them you will need a key 12 mm And necessarily checking the resistance of new spark plugs (should be 0.5-6 Ohm).

What to do if the candle breaks off?

If the ceramic part of the spark plug remains in the block head, do not try to remove it yourself - contact service. Can be used for emergency repairs candle extractor (For example, Lisle 65600), but it's risky without experience.

Common mistakes and how to avoid them

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

• 🔧 Re-upholstery of candles. Excessive tightening torque will lead to thread deformation in the aluminum block head. Symptom: the spark plug “sticks” and does not come out the next time it is replaced.
• 🧹 Debris entering the cylinder. Sand or metal shavings cause scoring on the cylinder walls And accelerated wear of piston rings.
• ⚡ Using candles with the wrong heat rating. Spark plugs are too hot (NGK with index 5-6) lead to detonation, “cold” ones (index 9-10) lead to misfire.
• 🔩 Damage to the ignition coil insulator. If you remove it carelessly, you can tear the rubber tip, which will lead to leakage current and passes.

⚠️ Attention: On Qashqai with engine MR20DD (direct injection) after replacing spark plugs necessarily you need to reset the ECU adaptations. To do this:

1. Disconnect the battery terminal for 10 minutes.
2. Start the engine and let it idle for 3-5 minutes.
3. Drive 50-100 km in gentle mode (no sudden acceleration).

Glow plugs on a diesel Qashqai: replacement features

On diesel Nissan Qashqai (engines M9R, R9M) are installed glow plugs, not ignition. Their function is to warm up the combustion chamber to facilitate cold starts. The replacement here has its own nuances:

• 🔥 Engine temperature. The spark plugs are coming out only on a cold engine (risk of breakage when hot).
• ⚡ Check before replacement. If the engine starts normally, but the spark plugs have not been changed for a long time, check them resistance multimeter (should be 0.5-6 Ohm).
• 🛠️ Special tool. For M9R you'll need a key 12 mm with extension cord and penetrating lubricant (the thread often sticks).

📌 Signs of faulty glow plugs:

• 🔋 The engine does not start the first time at temperatures below -10°C.
• 🌫️ It comes from the exhaust pipe white smoke (unheated fuel).
• 💡 Lights up on the dashboard glow plug spiral longer than 10 seconds.

⚠️ Attention: On Qashqai with AdBlue (system SCR) after replacing the glow plugs it may be necessary restarting the urea injection system. To do this, use a scanner (for example, Launch X431) or contact a service station.

Frequently asked questions about replacing spark plugs on Nissan Qashqai

Is it possible to change spark plugs one at a time if the others are still good?

No, it's highly not recommended. Even if the rest of the spark plugs visually look normal, they are still worn out. Different gap and condition of the electrodes will lead to uneven operation of the cylinders and increased engine load. The exception is if you change one candle after mechanical damage (for example, broken insulator).

What gap should the spark plugs be for a Qashqai with LPG?

When using gas equipment gap on spark plugs needed reduce to 0.7-0.9 mm (versus standard 1.0-1.1 mm). This is due to the higher combustion temperature of the gas. Suitable candles: NGK LR8AIX or Denso IW16TT.

What happens if you don’t change spark plugs longer than the regulations?

The consequences range from increased fuel consumption (by 10-15%) up to engine detonation, which can lead to:

• Cylinder head gasket failure.
• Piston deformations.
• Damage to the catalyst (due to unburnt fuel).

On diesel Qashqai worn glow plugs can cause incomplete combustion of fuel and clogging of the particulate filter (DPF).

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

No, no need to lubricate threads - this can lead to constriction and damage to the block head. Exception: if you install spark plugs with copper gasket (for example, on some sports versions), you can apply thin layer of graphite grease on the gasket.

Can I use spark plugs from other Nissan models?

Theoretically yes, but only if they completely coincide by parameters:

• Thread (M14x1.25 or M12x1.25).
• The length of the threaded part (must be 26.5 mm for HR16DE).
• Heat number (for Qashqai fits 6-7).

For example, candles from Nissan X-Trail with the same engine MR20DE will fit, but from Almera - no (different heat rating).