How to replace the heater radiator on a Nissan Almera: a detailed guide with photos and videos

Introduction: why does the stove on Almera stop heating?

Foggy windows in winter, cold air from the deflectors instead of a warm flow, puddles of antifreeze under the passenger's feet - all these are signs of a malfunction heater radiator on Nissan Almera. Model owners N16 (2000–2006), G15 (2012–2019) and even B10 (1995–2000) sooner or later face this problem. In 80% of cases, it is the stove radiator that is to blame - it becomes clogged, leaks or corrodes due to low-quality antifreeze.

Independent replacement of the stove radiator with Almera - a task of medium complexity. It requires patience, a set of tools and knowledge of key nuances (for example, how to properly drain antifreeze or not damage the plastic panel latches). At a car service center, they ask for this work from 8,000 to 15,000 rubles, while the radiator itself costs from 2,500 to 6,000 rubles, depending on the manufacturer. In this article - step-by-step instructions with photos, videos, tips for choosing spare parts and answers to frequently asked questions.

Signs of a malfunctioning heater radiator

Before you start replacing, make sure that the problem is in the heater core. Here are the key symptoms:

• 🔥 The stove blows cold air even when the engine is warm and the heater tap is open. This may mean that the radiator is clogged or there is no antifreeze circulating in it.
• 💧 Antifreeze puddles under the passenger's feet (right) is a clear sign of a leak. Liquid usually accumulates on the mat or seeps through the drainage holes.
• 🌫️ Fogging of glass from the inside, especially in wet weather. Evaporating antifreeze creates a film on the glass that is difficult to remove even with a napkin.
• 🚗 Antifreeze level drop in the expansion tank without visible external leaks. If it takes more than 200–300 ml per month, look for a problem in the salon.

Sometimes these symptoms are confused with a malfunction heater tap (on Almera N16) or thermostat. To rule out other causes:

1. Check the temperature of the pipes going to the heater radiator - both should be hot.
2. Make sure that the heater valve opens completely (at N16 it's mechanical, G15 - electronic).
3. Look under the dashboard on the passenger side - the leak is often visible to the naked eye.

⚠️ Attention: If antifreeze gets on the carpet or interior insulation, it must be wash thoroughly — it is toxic to humans and corrodes plastic. Use a soda solution (1 tablespoon per liter of water) and ventilate the interior for at least 24 hours.

Choosing a heater radiator for Nissan Almera: original vs analogues

The quality of the radiator determines how long it will last. Original spare parts Nissan (number 27200-4M000 for N16, 27200-BM40A for G15) are expensive, but guarantee a long service life. However, there are worthy analogues:

Manufacturer	Article	Price, ₽	Features	Suitable for models
Nissan (original)	27200-4M000	5 500–7 000	Median, high heat dissipation, durability	Almera N16
Denso	DRH0107	4 200–5 000	Japanese quality, aluminum body	Almera N16, G15
Nissens	64201	3 800–4 500	Danish production, good heat dissipation	Almera N16
LR (Luzar)	LRh 0107	2 500–3 200	Budget option, Russian brand	Almera N16, G15
Mahle	HC 17 01	4 800–5 500	German brand, high quality soldering	Almera G15

When choosing, pay attention to:

• 🔧 Material: Aluminum radiators are lighter and transfer heat better, but copper ones last longer and are easier to solder.
• 📏 Dimensions: compare the dimensions with the old radiator (especially important for Almera G15, where there are nuances with fastenings).
• 🔄 Presence of a check valve (on some models it is built into the radiator).

Preparing for replacement: tools and consumables

To replace the heater radiator with Nissan Almera you will need:

Keys and sockets: 10 mm, 12 mm, 14 mm

Screwdrivers: Phillips, flat, Torx T20 (for G15)

Pliers and wire cutters

Container for draining antifreeze (5–7 liters)

New antifreeze (3–4 liters, for example, CoolStream A-110 or Nissan L248)

Silicone sealant (eg ABRO 11-AB)

New clamps (4–6 pieces, size 16–22 mm)

Rags and plastic film (to protect the interior)

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Also prepare your workplace:

• 🚗 Place the car on a flat surface (preferably in a garage or on an overpass).
• 🔌 Disconnect the negative terminal of the battery - this will prevent a short circuit when working with electricity.
• 🌡️ Let the engine cool (the antifreeze in the system is under pressure and can burn!).

⚠️ Attention: On Almera G15 (2012–2019) access to the heater radiator is required complete dismantling of the dashboard. On N16 You can get by with partial disassembly, but it will take more time. If you do not have experience, watch the video instructions for your model in advance.

Step-by-step instructions for replacing the heater radiator

The replacement process differs between generations Almera. Below are universal instructions taking into account the nuances for N16 And G15.

Step 1: Drain the antifreeze

Drain the antifreeze through faucet on the radiator (lower pipe) or by disconnecting the lower hose. On Almera N16 the tap is located on the right in the direction of travel, on G15 - left. Don't forget to substitute the container!

If the antifreeze has not been changed for a long time, this is a good reason to add a new one. For Almera suitable class fluids G11 (green) or G12+ (red). The volume of the system is about 6 liters.

Step 2: Panel removal (partial or complete)

On Nissan Almera N16 you can do without completely removing the dashboard:

1. Remove glove compartment (4 screws and 2 latches).
2. Unscrew glove box (torx T20).
3. Remove bottom of the panel on the passenger side (2 radiator mounting bolts are hidden there).
4. Disconnect heater valve control cable (on models before 2006).

On Almera G15 you will have to remove the dashboard almost completely:

1. Disable panel backlight and remove the trim around the radio.
2. Unscrew the dashboard mounting bolts under the steering wheel and on the passenger side (8-10 bolts in total).
3. Carefully slide the panel back (you will need an assistant).

Step 3: Replacing the Radiator

When access to the radiator is open:

1. Loosen the clamps and remove pipes (antifreeze will leak out - prepare a rag).
2. Unscrew the radiator mountings (2–4 bolts depending on the model).
3. Carefully remove the old radiator without damaging the plastic guides.
4. Install the new radiator by first applying a thin layer of sealant to the rubber seals.
5. Connect the pipes and tighten the clamps (do not overtighten to avoid damaging the hoses!).

Step 4: Assembly and Testing

Reassemble everything in reverse order. After adding antifreeze:

1. Start the engine and warm up to operating temperature.
2. Check tightness - Are there any leaks on the pipes and radiator?
3. Make sure the heater is blowing hot air in all modes.
4. Add antifreeze to the level (after warming up, the level may drop).

What to do if after replacement the stove does not heat?

If the air remains cold, check:

1. **Air locks** in the system - they need to be expelled by lifting the front of the car and opening the expansion tank cap.

2. **Thermostat performance** - if it is stuck in the open position, the antifreeze does not warm up.

3. **Heater valve** (on N16) - the cable may have broken or the faucet has gone sour.

4. **Clogging of the new radiator** (rare, but happens when the system is not flushed properly).

Nuances for different generations of Almera

Every generation Nissan Almera has its own characteristics when replacing a stove radiator:

Almera N16 (2000–2006)

• 🔧 Heater valve often turns sour - it is better to replace it together with the radiator (article no. 27250-4M000).
• 🔄 Control cable the tap may come off - check its fixation after assembly.
• 💡 Panel lighting It is attached with fragile latches - remove carefully!

Almera G15 (2012–2019)

• 🔌 Electronic control unit stove (on some versions) requires resetting errors after disconnecting the battery.
• 🔧 Dashboard mounts hidden under decorative overlays - they need to be removed without effort so as not to break.
• 🌡️ Interior temperature sensor may interfere with dismantling - disconnect its connector in advance.

Almera Classic (B10, 1995–2000)

• 🔧 Heater radiator on B10 smaller in size, but the replacement process is similar N16.
• 💧 Pipes They often become tanned over time - replace them along with the radiator.
• 🔄 Heater valve mechanical, but its cable tends to break.

Common replacement mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes that lead to repeated disassembly or new breakdowns. That's what can't do:

• 🚫 Use old clamps - they lose elasticity and can leak antifreeze. Always get new ones.
• 🚫 Retighten the pipes - this leads to cracks in the hoses or failure of the radiator fittings.
• 🚫 Filling with antifreeze without flushing — if the system is dirty, the new radiator will quickly clog.
• 🚫 Ignore leakage after assembly - even a small drop can lead to repeated disassembly.

Typical problems after replacement and their solutions:

Problem	Reason	Solution
The stove blows cold air	Air lock	Warm up the engine with the expansion tank cap open, tap on the pipes
Antifreeze leak under the panel	The clamps are poorly tightened or the pipe is damaged	Check connections, replace hoses
Noise when the stove is running	Debris getting into the fan	Remove the fan and clean it
Temperature adjustment does not work	Crane cable or sensor not connected	Check cable connections and settings

⚠️ Attention: If, after replacing the radiator, the stove operates jerkily or makes whistle, check cabin filter — it could become clogged with dust during disassembly. On Almera G15 The filter is located behind the glove compartment.

FAQ: Answers to frequently asked questions

How long does it take to replace a heater radiator on an Almera?

On Almera N16 an experienced master leaves 4–6 hours, on G15 — 6–8 hours (due to the need to remove the dashboard). If this is your first time doing this, allow yourself a whole day.

Is it possible to replace the heater radiator without removing the dashboard on an Almera G15?

Theoretically it is possible, but it is extremely inconvenient. On G15 The radiator is hidden deep, and without removing the panel you risk damaging the pipes or not installing the new radiator hermetically. It's better not to waste time.

What antifreeze should I fill in after replacing?

For Almera N16 (until 2006) suitable G11 (green), for G15 (2012–2019) — G12+ (red). Volume - 6–7 liters. Popular brands: CoolStream, Sintec, Nissan L248 (original).

What to do if, after replacing the radiator, the stove heats poorly?

The reasons may be different:

1. Air lock - warm up the engine with the reservoir cap open, tap on the pipes.
2. Clogged cabin filter - replace it.
3. Faulty thermostat - check the temperature of the pipes (both should be hot).
4. Heater fan problems - check the fuse and relay.

Is it worth repairing the old heater radiator or is it better to buy a new one?

If the radiator flows — repair (soldering) will give a temporary effect (3–6 months). If he's just clogged, can be washed with special means (for example, LIQUI MOLY Kuhler-Reiniger). But in 90% of cases it is easier and more reliable to install a new one.