Replacing spark plugs with Nissan X-Trail T31 - a procedure that many owners put off until the last minute, until the engine begins to “triple” or fuel consumption increases by 15-20%. Meanwhile, timely replacement not only saves gasoline, but also extends the life of the catalyst, lambda probes and the engine itself. In this article we will analyze everything: from the choice of original spark plugs to the subtleties of their installation on gasoline versions QR25DE And MR20DE, including nuances for cars with HBO.

Standard regulations for X-Trail T31 (2007-2013) provides for replacing spark plugs every 30,000 km for ordinary nickel and 90,000–100,000 km for iridium or platinum. However, actual service life depends on fuel quality, driving style and engine condition. If you notice that the car jerks when accelerating, has trouble starting when cold, or a light comes on on the dashboard Check Engine with an error P0300 (misfire) - it's time to act. Don't wait for the problem to develop into an expensive repair!

Which spark plugs are suitable for Nissan X-Trail T31: original vs analogues

Official catalog Nissan offers for X-Trail T31 two main articulations of spark plugs depending on engine type:

  • 🔧 QR25DE (2.5 l): original candles 22401-CK80B (iridium, NGK PLZFR6A-11) or 22401-4M015 (platinum, Denso FK16HR11).
  • 🔧 MR20DE (2.0 l): original 22401-JK00B (NGK ILZFR6D11) or equivalent Denso IXUH22I.
  • ⚠️ For HBO: spark plugs with a lower heat rating are required (for example, NGK BPR6ES-11 instead of standard ones).

Is it worth paying extra for the original? Iridium spark plugs last 3-4 times longer than nickel ones, but their price starts from 800–1200 rubles apiece. Budget analogues (Bosch FR7DPX, Beru Z193) will cost 200–400 rubles, but their service life rarely exceeds 20,000 km. Experts recommend a middle ground: Denso Iridium Power or NGK Iridium IX — they combine a long service life and a reasonable price (about 500–700 rubles per candle).

📊 Which spark plugs do you prefer to install on the X-Trail T31?
  • Original Nissan
  • NGK
  • Denso
  • Bosch
  • Others

It is important to consider gap between electrodes. For X-Trail T31 it should be:

  • 📏 1.0–1.1 mm — for gasoline engines without LPG;
  • 📏 0.7–0.8 mm - for cars with gas equipment.
⚠️ Attention: If you install spark plugs with the wrong gap, you run the risk of detonation (knocking of fingers) or misfire. On MR20DE this often results in an error P0304 (Missing in cylinder 4).

Tools and preparation: what you need for replacement

To replace spark plugs yourself Nissan X-Trail T31 you will need:

  • 🔧 Candle key 16 mm with extension (for QR25DE - long, at least 20 cm).
  • 🔧 Socket wrench 10 mm to remove the ignition coils.
  • 🔧 Torque wrench (optional, but recommended for precise tightening).
  • 🧴 Dielectric grease (For example, Liqui Moly Silicon-Fett) for coil contacts.
  • 🧤 Gloves And compressor (or a can of compressed air) for cleaning wells.

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. Clear the area around the spark plug wells of dirt (debris getting into the cylinders = major repairs!).

Disconnect battery

Cool the engine (at least 2 hours)

Prepare tools and new spark plugs

Clean the wells from dust and oil -->

On X-Trail T31 Access to the spark plugs is complicated by the location of the ignition coils. On QR25DE they are hidden under a decorative cover, and on MR20DE — partially blocked by the intake manifold. If you've never removed the coils, practice on a cold engine to avoid breaking the plastic clips.

Step-by-step instructions: how to change spark plugs on an X-Trail T31

The process of replacing spark plugs Nissan X-Trail T31 takes about 1–1.5 hours if you have experience. Follow the algorithm:

  1. Removing the ignition coils:
    • Disconnect the power connector from the coil (press the plastic lock and pull up).
    • Unscrew the coil mounting bolt with a 10 mm wrench.
    • Carefully remove the coil by rocking it from side to side (do not pull on the wire!).
  2. Removing old spark plugs:
    • Insert the spark plug wrench into the well and unscrew the spark plug counterclockwise.
    • If the candle is “stuck”, do not use excessive force - treat the thread with a product WD-40 and wait 10 minutes.
  3. Installing new spark plugs:
    • Check the spark plug gap with a feeler gauge (for X-Trail T31 - 1.0–1.1 mm).
    • Apply a thin layer copper grease onto the thread (not onto the electrode!).
    • Tighten the spark plug by hand, then tighten with a torque wrench 20–25 Nm.
  4. Reassembly:
    • Install the coils in place, securing them with bolts.
    • Connect the connectors (the latch should click).

A critical nuance for the X-Trail T31: on the QR25DE engine, the spark plugs of the 1st and 4th cylinders are located at an angle, so they are easy to confuse during installation. Always check the cylinder numbering scheme (counted from right to left when looking at the engine from the radiator side).

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

If the spark plug electrode remains inside, do not try to remove it with a magnet or tweezers - this may damage the threads. Use a special candle extractor (for example, Lisle 65600) or contact service. In extreme cases, you will have to remove the cylinder head to drill out the fragment.

Common mistakes and how to avoid them

Even experienced car owners make mistakes when replacing spark plugs. X-Trail T31. Here are the most dangerous of them:

Error Consequences How to avoid
Re-upholstery of candles Thread failure in the block head, repair ~20,000 rubles. Use a torque wrench (20–25 Nm).
Installing spark plugs without lubrication Sticking of the thread, difficulties with the next replacement. Apply copper grease on the thread.
Debris getting into the cylinders Scouring on the cylinder walls, decreased compression. Blow out the wells with compressed air before removing the spark plugs.
Using candles with the wrong heat rating Detonation, burning out of pistons (especially on LPG). Check the labeling in the catalog NGK or Denso.

Another typical problem is damage to the ignition coil insulator in case of careless removal. If you notice cracks in the plastic body, it is better to replace the coil (the original is 22448-4M010, analogue - Beru ZS198). Otherwise misfire and error P030X will not keep you waiting.

⚠️ Attention: On X-Trail T31 with engine MR20DE after replacing spark plugs it may burn temporarily Check Engine with an error P0300. This is due to the ECU adapting to the new spark plugs. Reset the error with a scanner (for example, ELM327) or disconnect the battery for 10 minutes.

How much does it cost to replace spark plugs at a service center vs on your own?

Cost of replacing spark plugs Nissan X-Trail T31 in services in Moscow and regions varies:

  • 💰 Official dealer: 1,500–2,500 rubles (work only) + price of candles.
  • 💰 Unofficial service: 800–1,200 rubles.
  • 💰 On your own: 0 rubles (if you do not take into account the purchase of a tool).

The savings when replacing yourself will be 1,000–2,000 rubles, however, consider the risks: if you break the thread or damage the coil, repairs will cost 10–15 thousand. If you doubt your abilities, it is better to entrust the work to professionals - especially for owners X-Trail T31 with HBO, where errors in the selection of spark plugs are fraught with burnout of the valves.

💡

Before going to the service center, check which spark plugs are installed on your X-Trail T31. Often, “garage” craftsmen install cheap analogues, passing them off as originals. Take a photo of the markings on the old candles and check them with the catalogue.

Signs of spark plug wear: when is it time to change

How to understand that candles are on Nissan X-Trail T31 require replacement? Pay attention to the following symptoms:

  • 🚗 Difficult start engine, especially in cold weather (the starter turns, but the engine does not “catch”).
  • 💨 Increased fuel consumption by 10–15% (for example, from 10 l/100 km to 11.5 l/100 km).
  • 🔥 Detonation (metallic knocking sound during acceleration, similar to a “clicking”).
  • 🛑 Misfires (the car jerks at idle or when accelerating).
  • 🔍 Visual defects on the electrodes (carbon deposits, melting, cracks).

To diagnose the condition of the spark plugs, unscrew one of them (for example, from cylinder 1) and inspect:

  • 🔴 Red plaque - a sign of low-quality fuel with additives.
  • ⚫ Black dry soot — rich fuel mixture (problems with the lambda probe or injectors).
  • ⚪ White coating - lean mixture or overheating (risk of valve burnout!).
  • 💥 Melted electrodes - detonation or incorrect heat rating.

If detected on candles oil deposits, this may indicate wear on the oil seals or piston rings. In this case, replacing spark plugs is only a temporary solution, and the engine requires diagnostics.

💡

On an X-Trail T31 with a mileage of more than 150,000 km, wear of the spark plugs is often accompanied by problems with the ignition coils. If misfires remain after replacing the spark plugs, check the resistance of the coils with a multimeter (standard: 0.5–1.0 Ohm for the primary winding).

Video instructions and additional materials

For clarity, we recommend that you watch the video on replacing spark plugs with Nissan X-Trail T31:

🎥 Video 1: Replacing spark plugs with QR25DE (step by step with comments)

🎥 Video 2: Diagnosis of misfires on MR20DE

It is also useful to download the manuals:

If you plan to replace spark plugs regularly, it makes sense to purchase a specialized set of tools, for example, Hazet 4762-1 (spark plug wrench with magnet for easy removal).

FAQ: Frequently asked questions about replacing spark plugs on X-Trail T31

Can I use spark plugs from other Nissan models (eg Qashqai)?

Yes, but with reservations. For example, candles from Nissan Qashqai J10 with engine MR20DE (article 22401-JK00B) are also suitable for X-Trail T31 with the same motor. However for QR25DE spark plugs should be longer (thread 26.5 mm versus 19 mm for MR20DE). Always check the catalogs NGK or Denso.

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

The effects range from increased fuel consumption to detonation destruction of pistons. In practice, owners X-Trail T31 face:

  • A drop in engine power by 15–20%;
  • Damage to the catalyst (due to unburned fuel);
  • Failure of the ignition coils (overload due to a weak spark).

In critical cases, cylinder head repair is required.

Do I need to change spark plugs if the car runs on gas?

Yes, and you need to do it more oftenthan with gasoline. The gas burns at a higher temperature, which accelerates the wear of the electrodes. The optimal interval is every 20,000–25,000 km. It is also recommended to use “cold” candles (for example, NGK BPR6ES-11 instead of standard ones) and reduce the gap to 0.7–0.8 mm.

How to reset the Check Engine error after replacing spark plugs?

There are three ways:

  1. Disconnect the battery for 10–15 minutes (it will reset the ECU adaptations).
  2. Use a diagnostic scanner (for example, Launch CReader) to reset errors.
  3. Reset errors via the service menu (on some versions X-Trail T31 This is done by holding down the daily mileage reset button when turning on the ignition).

If the error P0300 appears again - check the ignition coils or the tightness of the intake manifold.

Can old candles be cleaned and reused?

Theoretically yes, but not recommended. Even after ultrasonic or sandblasting:

  • The electrodes become thinner, which impairs sparking;
  • The ceramic insulator loses its dielectric properties;
  • The thread may be damaged when unscrewing.

Cleaning is justified only in “field” conditions, if new spark plugs are not at hand.