<em>Nissan Murano Z50</em>air conditioner radiator: how to extend the life of the climate control system

Air conditioner radiator (condenser) in Nissan Murano Z50 - one of the most vulnerable elements of the climate system, especially in the conditions of Russian roads. Sand, salt, stones and corrosion reduce its life to 3–5 years, and the cost of original spare parts can reach 15–20 thousand rubles (for 2026). At the same time, ignoring problems with the radiator leads not only to loss of cold in the cabin, but also to compressor breakdown - and this is already a repair costing 50-80 thousand.

In this article we will analyze signs of trouble, how to distinguish an original radiator from a fake, the nuances of replacement (including preserving freon) and ways to extend its life without expensive repairs. We will place special emphasis on Murano Z50 with engines VQ35DE (3.5 l) and QR25DE (2.5 l), since their radiator design is different. The material is based on the experience of service technicians and reviews of owners - without “water” and general phrases.

Signs of a malfunctioning air conditioner radiator: when to go to service

The first symptoms of a problem are often attributed to an “undercharge” of freon or a sensor failure. However, if you notice at least two of these signs, with a probability of 85% it is the radiator that is to blame:

• 🔥 The air conditioner blows warm air even after a full charge of freon. At the same time, the compressor turns on (a click is heard), but there is no cooling.
• ❄️ Ice on air conditioner pipes under the hood - a sign that freon is not circulating normally due to a clogged radiator.
• 💦 Oil stains under the radiator (often confused with antifreeze leak). Freon circulates along with the oil, and when there are cracks, it seeps out.
• 🚨 Noise or vibration when the air conditioner is turned on, this may indicate that debris has entered the radiator or its fins are deformed.

On Murano Z50 There is a specific symptom: if, when the air conditioner is turned on at idle speed, the engine begins to “tweak”, this may indicate compressor overload due to poor heat transfer from the radiator. In this case, diagnostics must be carried out immediately — the risk of compressor clutch failure increases 3 times.

⚠️ Attention: If, after refilling freon, the air conditioner works for 1–2 days, and then stops cooling again, this is 100% leak through the radiator. Adding freon without repair will only speed up the breakdown of the compressor.

Original vs analogue: articles and prices for radiators for Murano Z50

Original air conditioner radiator for Nissan Murano Z50 has an article number 27800-4M00A (for 2008–2014 models) and 27800-4M01A (restyling 2015–2016). However, the market is full of fakes that are visually indistinguishable, but last 2-3 times less. How to avoid running into counterfeit goods?

Radiator type	Article	Manufacturer	Price, rub. (2026)	Features
Original (Nissan)	27800-4M00A	Japan	18 000–22 000	Aluminum, with factory markings on tubes
Analogue (Denso)	471-1207	Japan	12 000–15 000	The quality is not inferior to the original, but there are fakes
Analogue (Nissens)	952033	Denmark	9 000–11 000	Good value for money, but thin ribs
Budget (Febi)	27800	Germany	6 000–8 000	Service life - 1-2 seasons, often leaks at the seams

When choosing an analogue, pay attention to:

• 🔍 Tube thickness — in the original they are no thinner than 1.2 mm.
• 📏 Ribs size - with cheap radiators they become clogged more often.
• 🏷️ Marking - the logo is engraved on the original Nissan and batch number.

Important: radiators for Murano Z50 with engine VQ35DE (3.5 l) and QR25DE (2.5 l) not interchangeable due to different mounting locations. Check the article by VIN code!

Step-by-step replacement of an air conditioner radiator: instructions with photos

Replacing the radiator with Murano Z50 takes 3–4 hours and requires special equipment (vacuum pump, freon station). If you do not have experience working with the climate system, it is better to entrust it to professionals. However, if you decide to do it yourself, follow this algorithm:

Drain freon at the station (required!)

Disconnect battery

Remove the front bumper and radiator grille

Secure the condenser to avoid damaging the tubes

Prepare a new radiator and components (seals, clamps)

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Step 1. Removing the old radiator

First, remove the front bumper (unscrew the 4 bolts from the bottom and 6 clips from the top). Then disconnect the air conditioner pipes only after bleeding the freon! Use the keys on 10 And 12 - do not use force so as not to break the thread. The radiator is secured with 4 bolts (10 mm) and two latches on top.

Step 2. Installing a new radiator

Before installation, check that the mounting holes and tubes match. Install new O-rings (part no. 27825-4M000) and lubricate them special oil for air conditioning systems (For example, PAG-46). Tighten the bolts in a cross pattern to avoid distortion.

Step 3. Vacuuming and filling

After installation, the system must be evacuated at least 30 minutes to remove moisture. Then we charge freon (for Murano Z50 — R-134a, norm 500–550 g). We check the pressure with a pressure gauge: at idle it should be 25–35 psi on the low side and 200–250 psi on high.

⚠️ Attention: If after refueling the air conditioner works, but after a week it stops cooling again - check pressure sensor (article 39400-4M000). On Murano Z50 it often breaks down after replacing the radiator.

What should I do if the air conditioner does not turn on after replacing the radiator?

1. Check the fuse F37 (10A) in the block under the hood - it is responsible for powering the compressor clutch.

2. Make sure that the freon pressure sensor is connected (connector next to the battery).

3. If the compressor does not click, check the relay K35 in the interior fuse box.

4. If you suspect there is air in the system, repeat the evacuation (at least 40 minutes).

Cleaning the air conditioner radiator without removing it: myths and reality

Many owners Murano Z50 They are trying to save money by flushing the air conditioner radiator without dismantling it. It's possible, but only in the early stages of pollution. If the ribs are clogged with dirt by more than 50%, or there is corrosion, cleaning will not help.

How to clean:

• 🧹 Water under pressure (no more than 50 bar!), directing the jet parallel to the ribsso as not to bend them.
• 🧴 Special cleaners (For example, Liqui Moly Kuhler-Reiniger or Wynns Radiator Flush).
• 🧲 Magnetic brush to remove metal dust (relevant for regions with salty roads).

What not to do:

• ❌ Use acid cleaners (corrode aluminum).
• ❌ Blowing out the radiator with a compressor is oppressive to the ribs and worsens heat transfer.
• ❌ Clean with metal brushes - scratches will lead to corrosion.

Efficiency of cleaning without removal - 30–40%. If the radiator is already leaking or is very dirty, it is better not to waste time and money on half measures.

Top 5 reasons for radiator failure Murano Z50: how to prevent

Analysis of breakdowns on Nissan Murano Z50 (according to 50+ services in Moscow and the regions) showed that in 80% of cases the air conditioner radiator fails for the following reasons:

1. Corrosion from salt and reagents - especially relevant for regions with winter roads. Aluminum oxidizes and microcracks appear.
2. Mechanical damage (stones, branches) - the radiator is located low, and even a small impact can pierce thin tubes.
3. Contamination of ribs fluff, dust, insects - impairs heat transfer and increases pressure in the system.
4. Poor quality freon or oil - leads to the formation of sediment, which clogs the radiator channels.
5. Engine vibration - on Murano Z50 With a mileage of more than 150 thousand km, the radiator fastenings often become loose, which leads to friction and wear of the tubes.

How to extend the life of a radiator:

• 🛡️ Install safety net (for example, from Hepu or K-Guard) - it will protect you from stones and reduce pollution by 60%.
• 🧴 Treat the radiator once a season anti-corrosion composition (For example, Tectyl or Dinitrol).
• 🔧 Check radiator mounts every 30 thousand km - loose bolts cause vibrations.

On Murano Z50 with mileage over 100 thousand km recommended preventive replacement of o-rings air conditioner pipes (article no. 27825-4M000) - they become tanned and begin to leak freon.

Cost of work in the service: where is it cheaper and what to pay attention to

Prices for replacing an air conditioner radiator at Nissan Murano Z50 vary greatly depending on region and level of service. Average prices for 2026:

Service type	Cost of work, rub.	Cost of freon (R-134a), rub.	Warranty
Official dealer	8 000–12 000	1 500–2 000	1 year
Specialized car air conditioner	5 000–7 000	1 200–1 500	6 months
Multi-brand service	4 000–6 000	1 000–1 300	3 months
Garage craftsmen	2 500–4 000	800–1 000	No

What to look for when choosing a service:

• 🔧 Availability of a vacuum pump — without it it is impossible to recharge the system efficiently.
• 📋 Diagnostics before replacement - a good technician will first check the pressure in the system and the tightness of the tubes.
• 🛠️ Use of original seals - cheap rubber rings leak after 1-2 months.

⚠️ Attention: If the service offers to refill the air conditioner free when replacing a radiator, this is a reason to be wary. Most likely they are using recycled freon, which will kill the compressor in 1-2 seasons.

Common replacement mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes that lead to repeated breakdowns. Here are the most common:

1. Incorrect vacuumization - if you do not remove moisture from the system, it will mix with freon and form an acid that corrodes the tubes.
2. Re-upholstery of fastenings - Aluminum radiator tubes easily burst under excessive force. Bolt tightening torque - 8–10 Nm.
3. Using incompatible oil - for Murano Z50 need oil PAG-46, not universal PAG-100.
4. Ignoring pressure sensor check - if it is faulty, the compressor will not turn on even with a new radiator.

How to check the quality of work after replacement:

• 🌡️ The air temperature from the deflectors should be 5–8°C (measure with a thermometer).
• 🔊 When you turn on the air conditioner there should be no extraneous noise (creaks, knocks).
• 💧 There should be no oil stains under the radiator (check 1-2 days after refueling).

FAQ: Answers to frequently asked questions from owners Murano Z50

Is it possible to drive without an air conditioner radiator if it is leaking?

Technically possible, but highly undesirable. Without a radiator, the freon does not cool, and the compressor runs idle, which leads to its overheating. If you ignore the problem, after 1–2 months you will need to replace the compressor (from 30 thousand rubles).

Temporary solution: Disconnect the compressor clutch by removing the fuse F37 or relay K35. But this is only for getting to the service!

Which freon should I fill in the Murano Z50: R-134a or R-1234yf?

B Nissan Murano Z50 (2008–2016) in use R-134a only. Freon R-1234yf incompatible with the system and may damage seals. Refill rate:

• For VQ35DE (3.5 l) — 550–600 g.
• For QR25DE (2.5 l) — 500–550 g.

Usage R-1234yf voids the warranty on the radiator and compressor!

How long does the air conditioning radiator last on a Murano Z50?

Service life depends on operating conditions:

• Original radiator — 5–7 years (or 100–150 thousand km).
• High-quality analogue (Denso, Nissens) - 3–5 years.
• Budget analogue (Febi, JP Group) - 1–2 seasons.

In regions with salty roads, the resource is reduced by 30–40%. Regular washing of the radiator (2 times a year) extends its life by 20–30%.

Is it possible to solder the air conditioner radiator yourself?

Theoretically yes, but not recommended. Aluminum radiators are soldered using argon welding, and even after repair they last no more than a year. In addition:

• The cost of soldering (3-5 thousand rubles) is comparable to the price of a new budget radiator.
• After soldering is required complete flushing of the system, otherwise the scale will clog the expansion valve (thermostatic valve).
• Work guarantees are provided by individual workshops.

Conclusion: soldering is justified only for temporary solution (for example, on a long trip).

Why does the air conditioner turn on after replacing the radiator, but does not cool well?

There are several reasons:

1. Undercharging of freon — check the pressure with a pressure gauge (standard: 25–35 psi on the low side).
2. Air in the system — you need to repeat the vacuuming (at least 30 minutes).
3. Clogged filter drier (article 27850-4M000) - it must be changed every time the radiator is replaced.
4. Faulty cooling fan - if it does not turn on at 2nd speed, the radiator overheats.

The most common mistake is unreplaced filter drier. It costs 1–1.5 thousand rubles, but 90% of craftsmen “save” on it, which leads to repeated breakdowns.