Replacing spark plugs on a Nissan Qashqai: when to change and how to do it yourself

Replacing spark plugs with Nissan Qashqai - a procedure that many owners put off until the last minute, until the engine begins to “triple” or fuel consumption increases by 10-15%. Meanwhile, the stability of the engine, acceleration dynamics and even the service life of the catalyst depend on the condition of the spark plugs. In this article we will look at how often to change spark plugs on Qashqaiwhat parts to choose for engines HR16DE (1.6 l) and MR20DE (2.0 l), and is it possible to cope with the replacement yourself, without resorting to service services.

Feature Qashqai (especially first and second generation models) - a cramped engine compartment where access to the spark plugs is difficult with attachments. However, with proper preparation and the availability of specialized tools, the procedure will take no more than 1-1.5 hours. We will describe each stage in detail, indicate typical mistakes and give recommendations on choosing analogues of original candles NGK And Denso.

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

Official regulations Nissan requires replacement of spark plugs every 30,000 km for common nickel parts and 90,000–100,000 km for iridium or platinum. However, these figures are relevant for ideal operating conditions - high-quality fuel, moderate loads and no overheating. In the realities of Russian roads and gas stations, it is better to reduce the interval:

• 🔧 Regular candles (nickel) - every 20,000–25,000 km, especially if you refuel at dubious stations.
• ⚡ Iridium/platinum - through 60,000–70,000 km, but with a mandatory clearance check every 15,000 km.
• ❄️ In regions with harsh winters (frequent cold starts), the resource of candles is reduced by 15–20%.

Do not wait until the due date if you notice at least one of these symptoms:

• 🚗 The engine “troubles” (vibration at idle, misfires).
• ⛽ Fuel consumption increased by 1–2 liters without objective reasons.
• 💨 A drop in power, especially noticeable when overtaking or climbing a mountain.
• 🔥 Black soot (rich mixture), white coating (poor mixture) or traces of oil (problems with rings/caps) are visible on the candles.

⚠️ Attention: If drops of oil or fuel are found on the electrodes of the spark plugs, the problem lies deeper - in wear of the valve stem seals, piston rings or faulty injectors. Replacing spark plugs is only a temporary solution.

Which spark plugs are suitable for Nissan Qashqai: original vs analogues

For Qashqai with engines HR16DE (1.6 l) and MR20DE (2.0 l) Nissan recommends original spark plugs NGK PLZFR6A-11 (article 22401-JM00B) or their analogues from Denso — FK16HR11. However, there are worthy replacements on the market from other brands that are not inferior in quality, but are cheaper.

Manufacturer	Article	Type	Gap (mm)	Compatibility	Approximate price (pcs.)
NGK	PLZFR6A-11	Iridium	1.1	HR16DE, MR20DE	800–1000 ₽
Denso	FK16HR11	Iridium	1.1	HR16DE, MR20DE	700–900 ₽
Bosch	FR7DPX	Platinum	1.1	HR16DE	500–650 ₽
Beru	Z193	Nickel	1.1	MR20DE	250–350 ₽

When choosing analogues, pay attention to heat number (for Qashqai "6" fits) and gap between electrodes - he must be 1.0–1.1 mm. Iridium spark plugs last longer, but their high price is justified only for mileages over 20,000 km/year. For a rarely used car, high-quality nickel spark plugs with replacement every 20,000 km are sufficient.

⚠️ Attention: Do not use spark plugs with a gap of more than 1.1 mm - this will lead to misfire, especially at high speeds. For engines with HBO, the gap can be reduced to 0.9 mm.

Tools and preparation for replacing spark plugs on a Qashqai

To replace spark plugs yourself Nissan Qashqai you will need:

• 🔧 Candle key 16 mm with rubber seal (for HR16DE) or magnetic tip (for MR20DE).
• 🔩 Extension and ratchet (10 mm socket for removing ignition coils).
• 🧲 Torque wrench (optional, but recommended for precise tightening).
• 🧴 Dielectric grease (for processing coil tips).
• 🧹 Compressor or can of compressed air (for cleaning dust from wells).

Before starting work, complete the following steps:

Disconnect the negative terminal of the battery|Allow the engine to cool (working on a hot engine is dangerous!)|Clean the area around the spark plug wells from dirt|Prepare new spark plugs and tools-->

Pay special attention to cleanliness: getting sand or debris into the cylinders can lead to burrs on the shell of the sleeves. If the engine has recently been run, wait at least 2 hours - aluminum cylinder heads Qashqai sensitive to temperature changes.

What happens if you over tighten the spark plugs?

If over-tightened (more than 25 Nm), the threads in the aluminum cylinder head can be stripped. The repair will cost 15,000–30,000 rubles - cutting a new thread or replacing the cylinder head will be required.

Step-by-step instructions: how to change spark plugs on Nissan Qashqai 1.6 and 2.0

The process of replacing spark plugs HR16DE (1.6 l) and MR20DE (2.0 l) is similar, but there are nuances. Let's consider both options.

Engine HR16DE (1.6 l)

1. Remove the plastic engine cover (snap off the 4 clips).

2. Disconnect the ignition coil connector (press the latch and pull up).

3. Unscrew the coil mounting bolt with a 10 mm socket and remove the coil.

4. Blow out the spark plug well with compressed air.

5. Unscrew the old spark plug with a spark plug wrench (counterclockwise).

6. Install a new spark plug by tightening it by hand, then tighten 20 Nm.

Repeat steps for all 4 cylinders. On HR16DE The ignition coils are located in recesses, so you may need a flat-head screwdriver to remove them (carefully pry up the housing).

Engine MR20DE (2.0 l)

1. Remove the decorative cover (unscrew 2 T30 Torx bolts).

2. Disconnect the coil connector and unscrew the fastening bolt (10 mm socket).

3. Remove the coil by pulling it upward with force (it may “stick” to the spark plug).

4. Clean the well from oil and dirt (on MR20DE condensation accumulates more often).

5. Unscrew the spark plug and install a new one, tightening it to torque 25 Nm.

On Qashqai with a 2.0 liter engine, access to the rear spark plugs (3rd and 4th cylinders) is difficult due to the intake manifold. An extension cord with a universal joint will help here.

Typical mistakes when replacing spark plugs on a Qashqai and how to avoid them

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

• 🔧 Re-upholstery of candles - leads to thread failure in the cylinder head. Always use a torque wrench or tighten by hand no more than 1/4 turn past the stop.
• 🧲 Debris getting into the cylinders - even a small grain of sand can cause scuffing. Always clean wells before removing spark plugs.
• ⚡ Using the wrong candles - for example, with a heat rating of “5” instead of “6”. This will lead to detonation or glow ignition.
• 🔩 Damage to the coil insulator when extracting. If there are cracks on the insulator, the coil will have to be replaced (cost: 3,000–5,000 rubles).

Another common problem is broken spark plug when unscrewing. This happens if the thread is “stuck” or the spark plug has been twisted askew. To avoid this:

• Before unscrewing, treat the threads with penetrating lubricant (WD-40 or Liqui Moly MoS2).
• Use only hex spark plug wrench — open-end or ring wrenches often tear off the edges.
• If the spark plug does not budge, try screwing it back in a little and then unscrewing it again.

What to do if the spark plug breaks off in the block head?

The situation is unpleasant, but fixable. If the spark plug body breaks off and the threaded part remains inside, proceed as follows:

1. Remove the ignition coil and blow out the well with compressed air.
2. Treat the protruding part of the spark plug with penetrating lubricant and wait 15–20 minutes.
3. Use candle extractor (special tool with reverse thread). Screw it into a piece and turn it out along with the remains of the candle.
4. If the extractor does not help, you will need to remove the cylinder head and drill out the fragment.

The cost of the extractor is about 1,000 rubles, but it is cheaper than repairing the cylinder head. The service will charge 3,000–5,000 rubles for removing a spark plug fragment.

⚠️ Attention: Never try to drill out a broken spark plug without removing the cylinder head! Chips will enter the cylinder and damage the piston group.

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

Is it possible to drive with a faulty spark plug?

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

• Damage to the catalyst (unburned fuel burns out in it).
• Increased wear of the piston group due to detonation.
• Increased fuel consumption by 15–20%.

If the spark plug “pierces” the housing, this can damage the ignition coil.

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

No! Thread lubrication results in:

• Over-tightening (torque increases due to decreased friction).
• “Sticking” of the spark plug to the block head at high temperatures.

Exception - copper paste for aluminum heads, but it must be applied in a very thin layer.

How to check spark plugs without special equipment?

The simplest way is rearrangement:

1. Remember which cylinder is misfiring (by sound or ELM327 scanner).
2. Swap the spark plugs of the “suspect” cylinder with those of a known good one.
3. If the gaps have moved, the spark plug is to blame. If they remain in place, the problem is in the coil or wires.

You can also visually inspect the spark plug: the normal color of the electrodes is gray-brown. Black soot is a rich mixture, white soot is a poor mixture.

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

The cost of work depends on the region and type of candles:

• Replacement of 4 spark plugs (without cost of parts) - 1 500–2 500 ₽.
• Replacement with coil diagnostics - 2 500–3 500 ₽.
• Removing a broken candle - 3 000–5 000 ₽.

At dealerships Nissan the price is 20–30% higher, but they provide a guarantee on the work.