If you are the owner Nissan Qashqai, X-Trail or other model with engines MR20DD, HR16DE, then sooner or later you will be faced with the need to replace antifreeze. Factory antifreeze Nissan L255N is not just a coolant, but a specially developed composition that protects aluminum cylinder blocks from corrosion and overheating. But what to do when the time comes to replace it? How to avoid running into a fake? And can it be mixed with analogues?

This article contains an analysis technical specifications L255N, comparison with popular analogues (CoolStream A-110, Sintec Unlimited), step-by-step replacement instructions taking into account the nuances of cooling systems Nissan, and also critical errors that lead to pump jamming or radiator destruction. Without water - only specific data verified in practice by mechanics and owners.

Technical characteristics of antifreeze Nissan L255N

Antifreeze Nissan L255N belongs to the class carboxylate (OAT) extended life coolants. Its key parameters:

  • 🔹 Color: green (not to be confused with blue L248N for older models!).
  • 🔹 Standard: corresponds JIS K 2234 And Nissan MES N 2640-19.
  • 🔹 Freezing point: to -40°C (when diluted 50/50 with distilled water).
  • 🔹 Service life: 10 years or 200,000 km (provided the system is sealed).
  • 🔹 pH level: 7.5–8.5 (alkaline balance to protect aluminum).

Feature L255N — absence of silicates and borates, which form deposits in the radiator over time. Instead, organic corrosion inhibitors based on carboxylic acids are used. This makes the antifreeze compatible with aluminum alloys, widely used in engines Nissan last generations.

Parameter Value for L255N Acceptable analogues
Base Ethylene glycol Ethylene glycol (G12++, G13)
Color Green Green, yellow (do not mix with red!)
Service life 10 years / 200,000 km 5–10 years (depending on brand)
Boiling point 130°C (at 1.1 bar pressure) 125–135°C

⚠️ Attention: If in your Nissan filled from the factory L255N, but you decide to switch to another antifreeze, complete flushing of the system is mandatory. Carboxylate and hybrid fluids (e.g. G11) when mixed, they form gel-like clots that clog the radiator channels.

Compatible with Nissan models: where L255N applies

Antifreeze Nissan L255N used in most modern models since 2010. Here's the full list:

  • 🚗 Qashqai J11 (2014–present) with engines MR20DD, HR16DE, R9M (diesel).
  • 🚙 X-Trail T32 (2014–present), including hybrid versions.
  • 🚘 Juke F15 (2014–2019) and Juke F16 (2019–present).
  • 🚛 Navara NP300 (2015–present) with gasoline and diesel engines.
  • 🔌 Ariya (2021–present) - here L255N poured into the cooling system of the battery and inverter.

For older models (Qashqai J10, X-Trail T31) antifreeze was used L248N (blue, class G11). You can't mix them! If you buy a used car, be sure to check which antifreeze was filled in earlier - this will save you money on flushing the system.

📊 What Nissan do you have?
  • Qashqai
  • X-Trail
  • Juke
  • Navara
  • Ariya
  • Other model

⚠️ Attention: B Nissan Almera G15 (2012–2018) and Teana L33 (2013–2017) also used L255N, but with one nuance: in these models the volume of the cooling system is larger (up to 8 liters), so a complete replacement will require two 5 liter canisters.

How to check the condition of antifreeze: 3 key tests

The manufacturer states that L255N lasts 10 years, but in practice the period depends on operating conditions. Here's how to determine when it's time to change the fluid:

  1. Visual inspection:
    • 🔍 The color has become cloudy or brown - a sign of oxidation of additives.
    • 🔍 Appeared flakes or sediment — the beginning of the decay of inhibitors.
    • 🔍 On the walls of the expansion tank white coating - mixing with tap water.
  2. Density test:

    Use a hydrometer. Normal indicators for L255N:

    • 🌡️ 1.075–1.085 g/cm³ at +20°C (protection up to -40°C).
    • 🌡️ 1.065–1.070 g/cm³ - diluted with water (protection up to -25°C).
  • pH meter:

    Acidity lower 7,0 or higher 9,0 means that the antifreeze has lost its properties.

    • 💡

    If you don’t have a hydrometer, check the antifreeze the “folk” way: drop it on white paper and let it dry. Clean L255N will not leave traces, and the spent one will leave brown stains.

    ⚠️ Attention: If visible in the expansion tank bubbles when the engine is running, this could be a sign cylinder head gasket breakdown (antifreeze is mixed with oil). In this case, urgent diagnosis is needed!

    Step-by-step instructions for replacing antifreeze in Nissan

    For replacement L255N you will need:

    • 🛠️ New antifreeze (5–8 liters, depending on the model).
    • 🛠️ Distilled water (10-15 liters for rinsing).
    • 🛠️ Set of sockets and wrench on 10 mm for the drain plug.
    • 🛠️ Container for old antifreeze (minimum 10 liters).
    • 🛠️ Funnel and hose for pouring.

    ⚠️ Important: Replace with cold engine — hot antifreeze under pressure can cause burns!

    Make sure the engine is cool (temperature below 50°C)|

    Prepare a container for draining (at least 10 l)|

    Disconnect the battery terminal (to avoid short circuit)|

    Check the tightness of the new antifreeze canister -->

    Step 1: Drain the old antifreeze

    1. Place the car on a flat surface or a lift.

    2. Remove engine protection (if any). B Nissan Qashqai J11 To do this you need to unscrew 6 bolts.

    3. Place a container under radiator drain plug (lower right corner). In some models (for example, X-Trail T32) plastic plug - unscrew it carefully!

    4. Open the plug expansion tank to relieve pressure.

    5. Unscrew the drain plug and wait until the liquid is completely drained (about 15–20 minutes).

    Step 2: Flushing the System

    If the antifreeze is heavily contaminated or you switch to another type, flushing is required:

    1. Close the drain plug.

    2. Fill distilled water through the expansion tank to the mark MAX.

    3. Start the engine and let it run 10–15 minutes at idle speed.

    4. Drain the water and repeat the procedure 2-3 times until the drained liquid becomes clear.

    What are the dangers of rinsing with tap water?

    Tap water contains calcium and magnesium salts, which, when heated, form scale on the walls of the radiator and cylinder block. This impairs heat transfer and can lead to engine overheating. Distilled water is free of these impurities.

    Step 3: Add new antifreeze

    1. Make sure all plugs are closed.

    2. Fill Nissan L255N through the expansion tank to the mark MAX.

    3. Start the engine and let it run 5–7 minutes with the tank cap open to allow air to escape.

    4. Add antifreeze to the level and close the plug.

    5. Warm up the engine to operating temperature (the fan will turn on) and check the level again.

    💡

    After replacing the antifreeze, monitor the level in the tank for a week - “drawdowns” are possible due to air escaping from the system.

    Top 5 analogues of Nissan L255N: what can be filled instead of the original

    Original L255N is expensive (from 1,500 rubles for 5 liters), but there are worthy analogues with the same characteristics:

    Brand and name Compatibility Price (5 l) Notes
    CoolStream A-110 Full 1,200–1,400 rub. Produced under license Nissan, identical composition.
    Sintec Unlimited Full 900–1,100 rub. Service life - 5 years (shorter than L255N).
    Motul Inugel Optimal Partial 1,800–2,000 rub. Suitable for diesel engines (R9M).
    Liqui Moly KFS 2001 Plus Full 1,500–1,700 rub. Tolerance VW TL 774-J, but compatible with L255N.
    Ravenol HJC Hybrid Japanese Coolant Full 2,000–2,200 rub. Premium class, service life up to 250,000 km.

    ⚠️ Attention: Never use antifreeze class G11 (blue or green, but with silicates) and G12 (red). They are not compatible with L255N and can call:

    • 🚨 Corrosion of aluminum parts (for example, in HR16DE).
    • 🚨 Clogging of radiator channels with gel-like deposits.
    • 🚨 Engine overheating due to deterioration in heat transfer.

    Common mistakes when replacing antifreeze

    Even experienced car owners sometimes make mistakes that lead to serious damage. That's what can't do:

    1. Mix different types of antifreeze.

      For example, L255N (carboxylate) + G11 (silicate) = chemical reaction with precipitation.

    2. Use tap water for dilution.

      Will lead to scale formation in thermostat And stove radiator.

    3. Do not bleed the system after replacement.

      Air locks can cause local overheating (especially dangerous for turbocharged engines).

    4. Ignore leaks.

      If the level L255N drops faster than normal (more than 200 ml per 1,000 km), look for a leak in pump, nozzles or radiator.

    5. Fill in antifreeze by eye.

      Underfilling leads to overheating, overfilling leads to excess pressure and rupture of the tank.

    💡

    After replacing the antifreeze, check that the interior heater is operating at maximum temperature. If cold air blows, there is air left in the system and it needs to be pumped again.

    Frequently asked questions (FAQ)

    Can Nissan L255N be mixed with CoolStream A-110?

    Yes, CoolStream A-110 - this is complete analogue L255N, manufactured to the same specification. Mixing is allowed without flushing the system.

    How often does antifreeze need to be changed in Nissan Qashqai J11?

    Official regulations - every 10 years or 200,000 km. However, when operating in difficult conditions (frequent traffic jams, high temperatures), it is recommended to reduce the interval to 5 years or 100,000 km.

    What happens if you fill it with ordinary water instead of L255N?

    Water does not have anti-corrosion additives, therefore:

    • 🔥 Aluminum engine parts will begin to oxidize.
    • 🔥 In winter, the water will freeze and will rupture the radiator or cylinder block.
    • 🔥 In summer, overheating is possible due to the low boiling point (100°C against 130°C at L255N).
    What kind of antifreeze is in the Nissan Ariya?

    B Ariya the same one is used Nissan L255N, but with one caveat: it is poured not only into the engine cooling system, but also into battery and inverter cooling circuit. Replacement should only be carried out by a certified technician, as special equipment for vacuum bleeding is required.

    Why does the engine get hotter after replacing antifreeze?

    Probable reasons:

    • 🔥 Stayed air in the system (needs to be pumped).
    • 🔥Used poor quality or incompatible antifreeze.
    • 🔥 Got stuck radiator (washing required).
    • 🔥 Defective thermostat (stuck in closed position).

    Check your cooling system immediately to avoid overheating!