Nissan Cube AZ10 - an iconic compact van with a unique design, but even its reliable engine HR16DE (1.6 l) or MR18DE (1.8 L) may suffer from a faulty radiator. Engine overheating is not uncommon here: the narrow honeycombs of the original radiator quickly become clogged, and corrosion eats away aluminum tanks within 5–7 years of operation. In this article we will look at how diagnose problems, choose a high-quality replacement (including budget analogues), and why after replacing the radiator with an AZ10 it is necessary to flush the system with a special compound - otherwise the new radiator will not last longer than the old one.
Owners Cube AZ10 (2008–2014) are often faced with two scenarios: either the radiator begins to leak due to cracks in the plastic tanks, or its honeycombs become clogged to such an extent that the cooling fan runs almost constantly. At the same time symptoms of malfunction in the early stages it can easily be confused with a broken thermostat or pump. We have collected current data on article numbers, prices for spare parts (2026), as well as step-by-step replacement instructions with nuances that cannot be found in standard manuals.
Signs of a radiator malfunction on a Nissan Cube AZ10
First call - increase in coolant temperature up to 100–110°C when driving in traffic or at low speeds. On the dashboard AZ10 This is indicated by the check engine light flashing (CHECK ENGINE) or a direct signal about overheating. But there are also less obvious symptoms:
- 🔥 Antifreeze level drop no visible leaks under the car (liquid leaves through microcracks in the radiator, evaporating on a hot engine).
- 🌀 Cold air from the stove when the engine is warm - a sign of an air lock due to air leaks through a damaged radiator.
- 🚗 Cooling fan turns on frequently even at idle speed (the radiator honeycombs are clogged with dirt or corrosion products).
- 💧 Oily spots on the radiator - a signal about mixing antifreeze with oil through a cracked heat exchanger (requires urgent diagnostics!).
Feature Cube AZ10 — compact engine compartment, where the radiator is located very close to the air conditioner condenser. Because of this dirt and poplar fluff accumulate between cells faster than on other models Nissan. You can check the condition of the radiator visually: if no light shines through its cells, it means it needs flushing or replacement.
⚠️ Attention: If on the radiator AZ10 white or greenish smudges appear - this is a sign of corrosion of aluminum tubes. It is useless to “treat” such radiators: even after soldering, they will last no more than six months.
Original vs analogs: which radiator to choose for Cube AZ10
Original radiator from Nissan has an article number 21460-4M000 (for models with air conditioning) or 21460-4M001 (no air conditioning). Its advantages are a perfect fit and guaranteed compatibility, but the price is steep: from 18,000 to 25,000 rubles (2026). Alternatives are cheaper, but not all are suitable:
| Brand | Article | Price (RUB) | Features | Rating (5) |
|---|---|---|---|---|
| Nissan (original) | 21460-4M000 |
18 000–25 000 | Aluminum honeycombs, plastic tanks, full compatibility | 5 |
| Denso | DRH0127 |
12 000–15 000 | Japanese quality, reinforced tanks, suitable for turbo versions | 4.8 |
| Koyorad | NH052207 |
9 500–11 000 | Thick honeycombs, but the cisterns can crack in severe frosts | 4.5 |
| Spectra Premium | CU1120 |
7 000–9 000 | Budget option, but often requires modification of fastenings | 4.0 |
| Febi Bilstein | 21460 |
8 500–10 000 | German quality, but there are fakes | 4.2 |
When choosing an analogue, pay attention to tank material: plastic ones are cheaper, but they crack at temperatures below -25°C. Aluminum tanks (for example, Denso) are more expensive, but last 2–3 times longer. Also check honeycomb thickness: Cheap radiators are thinner, which results in poorer heat dissipation.
- Original (Nissan)
- Denso
- Koyorad
- Spectra Premium
- Other brand
Important nuance: On Cube AZ10 With automatic transmission, the radiator is integrated with the oil heat exchanger. When replacing, you will also have to drain the oil from the automatic transmission, so it is better to choose a radiator with an already installed heat exchanger (for example, 21460-4M000 included "AT").
Step-by-step instructions for replacing the radiator on a Nissan Cube AZ10
Replacing the radiator with AZ10 takes 3–4 hours if you have the tools. The main difficulty is cramped engine compartment, so you will have to remove the front bumper and grille. Here's what you'll need:
Antifreeze drain container (minimum 8 l)
Set of sockets and keys (10 mm, 12 mm, 14 mm)
Screwdriver with Phillips bit
Clamp pliers
New radiator + gaskets
Antifreeze (6–7 l, Nissan L250 specification or equivalents)
Silicone sealant (eg Loctite 574)
Clean rags -->
Step 1: Drain the antifreeze
Open the expansion tank cap and drain valve on the radiator (lower left corner). On Cube AZ10 The faucet is plastic - do not use excessive force so as not to break it! Drain the antifreeze into a clean container: if it is not older than 2 years, it can be poured back after flushing the system.
Step 2. Removing the old radiator
- Remove the front bumper (unscrew the 4 bolts from the bottom and 2 screws from the top).
- Disconnect the cooling fan and temperature sensor connectors.
- Loosen the clamps and remove the hoses from the radiator (upper and lower). Be careful - antifreeze may remain in them!
- Unscrew the 4 bolts securing the radiator to the body (two on top, two on bottom).
- Carefully remove the radiator along with the fan (they come assembled).
Step 3. Installing a new radiator
Please check the condition before installation rubber gaskets on the fittings - replace them if necessary. The new radiator is installed in the reverse order. Pay special attention to:
- 🔧 Tightening the clamps — they should fit tightly, but not pinch the hoses.
- 🔌 Fan connection - on AZ10 connectors often oxidize, clean them
WD-40. - 💧 Refilling antifreeze - Fill slowly to avoid air pockets. After refueling, warm up the engine to operating temperature and add fluid.
⚠️ Attention: On Nissan Cube AZ10 After replacing the radiator it is necessary flush the cooling system special composition (for example, LIQUI MOLY Kuhler-Reiniger). If this is not done, the old sediment will quickly clog the new radiator!
Before installing a new radiator, check the operation of the thermostat: if it is stuck in the closed position, even a new radiator will not save you from overheating. To check, place the thermostat in a pan of water and heat it to 85°C - it should open.
Flushing the cooling system: why is it critical for the AZ10
B Cube AZ10 the cooling system has narrow channels in the cylinder block, which are easily clogged with antifreeze decomposition products. If you ignore flushing, the new radiator will last no more than a year. Washing process:
- First flush: Fill into the system
distilled water + cleaning agent(For example, Wynns Cooling System Flush). Start the engine and let it idle for 10–15 minutes. - Draining dirt: Drain the fluid - it will be black or rusty in color. Repeat rinsing with clean water until the outlet water becomes clear.
- Refilling antifreeze: Use only carboxylate antifreeze (For example, Nissan L250 or CoolStream A-110). They do not form sediment and last up to 5 years.
What happens if you don't flush the system?
- 🔥 Engine overheating due to clogged channels.
- 💸 Accelerated pump wear (dirt destroys the oil seal).
- ❄️ Poor stove performance in winter (clogged heater radiator).
How to check the quality of washing?
After draining the flushing fluid, inspect its color:
- **Black** - there were a lot of oil deposits in the system (possibly the cylinder head gasket was broken).
- **Rusty** - active corrosion in the cylinder block or radiator.
- **Green**—remains of old antifreeze (needs re-flushing).
If after 3 flushes the water does not become clear, disassembling the system and mechanical cleaning is required.
Cooling system tuning: how to avoid overheating on AZ10
Standard cooling system Cube AZ10 designed for moderate climates, but in hot regions (or when driving with air conditioning) its supply is often not enough. Here proven improvements:
- ❄️ Installing an additional radiator (for example, from Nissan Juke with article number
21460-4M200). Mounted in front of the main radiator and connected in parallel. - 🌀 Replacing the fan with a more powerful one (for example, from Toyota Corolla E150 — suitable for fastenings and has high performance).
- 💧 Using antifreeze with additives (For example, G12++), which reduce the boiling point by 10–15°C.
- 🔧 Installing a thermostat with a lower opening temperature (for example, 82°C instead of the standard 88°C).
The most effective modification is replacing the radiator with a model with an increased honeycomb area. For example, a radiator from Nissan Note E12 (21460-4M100) is suitable for fastenings and has a 20% larger cooling area. Moreover, its price is only ~12,000 rubles.
⚠️ Attention: When installing an additional radiator, do not forget about electrical part - you will need a relay and a 30A fuse. Connect the fan through a separate toggle switch in the cabin to avoid battery discharge.
Common mistakes when replacing a radiator on Cube AZ10
Even experienced craftsmen sometimes make mistakes that lead to repeated overheating or leaks. That's what can't do:
- 🚫 Use radiator sealants (type Stop Leak). On AZ10 they clog the honeycomb of the heater radiator, after which the stove stops heating.
- 🚫 Filling with antifreeze without flushing. Old sediment in the system will negate the effectiveness of the new radiator.
- 🚫 Tighten hose clamps. On Cube Plastic radiator fittings are easily broken by excessive force.
- 🚫 Ignore pump check. If the pump is worn out, it will not create the required pressure and antifreeze will not circulate through the radiator.
Another common mistake is improper bleeding of the system after replacing the radiator. On AZ10 for this you need:
- Start the engine and warm it up to operating temperature (the arrow on the instrument panel should reach the middle).
- Turn off the engine, open the expansion tank cap and squeeze the upper radiator hose several times (this will expel the air).
- Add antifreeze to the level
MAXand repeat the procedure.
After replacing the radiator, avoid sudden loads on the engine for the first 500 km. Antifreeze should be evenly distributed throughout the system, and air pockets should come out naturally.
Cost of work and spare parts in 2026
Radiator replacement prices Nissan Cube AZ10 vary depending on region and service:
| Service/Spare part | Price (RUB) | Notes |
|---|---|---|
Radiator original (21460-4M000) |
18 000–25 000 | Includes automatic transmission heat exchanger (for automatic) |
Radiator Denso (DRH0127) |
12 000–15 000 | The best analogue in terms of price/quality ratio |
| Antifreeze Nissan L250 (5 l) | 2 500–3 000 | Requires 6–7 liters for a complete replacement |
| Flushing the system (LIQUI MOLY) | 800–1 200 | Mandatory when replacing the radiator |
| Replacement work (service) | 5 000–8 000 | Includes antifreeze drain/fill and system check |
You can save money if you do the work yourself. Main expense items - radiator and antifreeze. You shouldn’t skimp on cleaning: cheap products (such as "Mole for radiators") may damage the aluminum parts of the system.
FAQ: Answers to frequently asked questions
Is it possible to drive with a leaking radiator if the antifreeze drains slowly?
No! Even a small leak leads to air entering the system, which causes local overheating of the engine. On HR16DE (motor Cube AZ10) this is fraught with deformation of the cylinder head. At the first sign of a leak, the radiator needs to be replaced.
What antifreeze should I fill in Nissan Cube AZ10?
Only carboxylate antifreeze with permission Nissan: original L250 (blue) or analogues (CoolStream A-110, Sintec Unlimited G12++). You can't mixed with antifreeze or hybrid antifreeze (G11) - this will cause the formation of a gel in the system.
How long does the radiator on Cube AZ10 last?
Service life depends on operating conditions:
- Original radiator: 7–10 years with regular antifreeze replacement.
- Analogues (Denso, Koyorad): 5–7 years.
- Budget analogues (Spectra): 3–4 years.
In regions with hard water or frequent temperature changes, radiators fail 20–30% faster.
What should I do if, after replacing the radiator, the heater blows cold air?
This is a sign air lock in the system. To resolve:
- Start the engine and warm up to operating temperature.
- Open the expansion tank cap and squeeze the upper radiator hose 5-6 times.
- Add antifreeze to the level
MAXand repeat the procedure.
If it doesn't help, check stove faucet (on AZ10 it often turns sour).
Can I install a radiator from another Nissan model?
Yes, but only with suitable fastenings. Confirmed options:
- Nissan Note E12 (
21460-4M100) - more than hundreds, but requires modification of the fan mounts. - Nissan Juke F15 (
21460-4M200) - fits without modifications, but more expensive.