A complete guide to selecting and replacing power steering fluid in the Nissan Murano Z51

Proper steering operation is the foundation for safety when driving a crossover. Nissan Murano second generation (Z51 body). The power steering in this model is sensitive to the quality of the operating environment, and the use of unsuitable fluid can lead to rapid wear of the pump, noise when turning the steering wheel, and even system failure at a critical moment. Many car owners mistakenly believe that they can add any “mineral water” or universal fluid, but engineers Nissan have provided strict specifications for their units.

Ignoring the manufacturer's recommendations often ends in costly repair of the hydraulic pump or replacement of the rack. Unlike modern electric boosters, the classic hydraulic booster Murano Z51 requires regular level monitoring and periodic oil changes. If you notice darkening of the liquid or the appearance of metal shavings on the dipstick, you cannot postpone a visit to service or independent replacement.

Specifics of the hydraulic system Nissan Murano Z51

Power steering system on a crossover Nissan Murano (Z51) is a classic closed circuit operating under high pressure. The pump, driven by a belt from the engine, creates the necessary pressure, which is transmitted to a hydraulic cylinder integrated into the steering rack. A special feature of this model is its high sensitivity to oil viscosity, which must remain stable at extreme temperatures.

It is important to understand that hydraulic fluid performs not only the function of transmitting force, but also serves as a lubricant for the internal parts of the pump and rack. At low temperatures, thickened liquid increases the load on the pump, which can lead to overheating and failure. Conversely, at high temperatures, too thin oil will not be able to create the necessary pressure, and the steering wheel will become “heavy”.

To ensure correct operation of the system, it is necessary to use specialized products. The technical regulations of the manufacturer clearly state the requirements for tolerances and chemical composition. The use of cheap analogues often leads to the formation of sediment, which clogs the valves of the pressure distributor.

• 🔧 The power steering pump operates at a frequency depending on engine speed, so stability of performance is important.
• 🛡️ The system is sealed, but rubber products (oil seals, seals) require compatible oil.
• 🌡️ The operating temperature of the liquid in the system can reach 80-90 degrees Celsius during active driving.

Original specification and approvals

Official dealer standard for Nissan Murano Z51 is a liquid PSF-3 (Power Steering Fluid). This is a specific development that differs from conventional ATF oils or other types of power steering fluids. It is this specification that provides the necessary balance between lubricating properties and corrosion protection of metal parts.

The question often arises: is it possible to use gear oil? ATF? In some older cars this is acceptable, but for Nissan Z51 series this is strictly not recommended, unless the manufacturer indicates otherwise in the service book. ATF chemistry can attack rubber seals designed for PSF-3, causing them to leak.

If you cannot find the original liquid Nissan Genuine Power Steering Fluid, you need to look for analogues that have a conformity mark. Look for inscriptions on the canister confirming compliance with the standard JIS K 2233 or specifications Nissan. It is important to prevent mixing of liquids of different colors and compositions.

• 🛒 Original article: 999MP-PSF00 (check relevance by VIN).
• 🔄 A complete replacement requires about 1 liter, when washing - up to 2-3 liters.
• ⚠️ It is prohibited to mix mineral and synthetic liquids without complete rinsing.

⚠️ Attention: Using red fluid (ATF Dexron) instead of specialized PSF can cause swelling of the seals and rapid loss of rack tightness.

Signs of need for replacement and diagnosis

Realize that it's time to change power steering fluid, is possible based on a number of indirect and obvious signs. The very first symptom is usually a change in the sound of the pump. If previously the system worked silently, but now a hum or howl is heard when you turn the steering wheel, this indicates cavitation or wear of parts due to loss of oil properties.

A visual inspection of the level and condition of the fluid on the dipstick also provides a lot of information. Normal liquid for Murano Z51 must be transparent, have a reddish or greenish tint (depending on the batch and manufacturer) and contain no impurities. If you see a dark, almost black substance with a burning smell, the system requires immediate intervention.

Particular attention should be paid to the presence metal shavings on the dipstick or in the expansion tank. This is a sure sign that the pump or rack has already begun to deteriorate. In this case, simply replacing the fluid will not be enough; repair or replacement of the unit will be required.

• 🔊 The appearance of extraneous noise when turning the steering wheel at idle.
• 📉 Increased effort on the steering wheel, especially at low speeds and when parking.
• 🌫️ The appearance of foam in the tank, indicating air entering the system.

⚠️ Attention: If the steering wheel becomes heavy and does not return to center, this may indicate a critical loss of pressure in the system, requiring a stop and diagnosis.

Preparatory work and tools

Before you begin the replacement procedure, you need to prepare a workplace and the necessary tools. For Nissan Murano Z51 Access to the power steering reservoir is usually quite simple, but a lift or pit may be required to properly drain the old fluid. Make sure the engine is cool to avoid burns from hot parts.

You will need a standard set of tools: a set of sockets and keys, a syringe for pumping out old fluid, a new canister of oil and a container for draining waste. It is also recommended to have rags and gloves on hand, as hydraulic oil leaves residue that is difficult to clean.

An important step is to check the condition of the pump drive belt. If the belt is worn or loose, changing the fluid will not solve the noise problem. Inspect the belt for cracks and check tension.

Step-by-step instructions for replacing fluid

Replacement procedure power steering fluid on Murano Z51 does not require sophisticated equipment, but requires patience and accuracy. Start by pumping out the old fluid from the expansion tank using a syringe. Try to remove as much volume as possible without allowing air to enter the pump, as this may cause it to run dry.

Next, you need to disconnect the return hose (drain) from the tank and lower its end into the prepared container. This can be done by slightly loosening the clamp on the hose. After this, ask an assistant to crank the engine (without starting it for a long time) or, more effectively, turn the steering wheel from lock to lock with the engine off to push the remaining old fluid out of the system.

For a better replacement, the pumping method with starting the engine is recommended. Fill in some new fluid, run the engine for 2-3 seconds and turn off. Pump out the displaced fluid again. Repeat this process until clean new fluid comes out of the system.

• 🔄 Turn the steering wheel all the way left and right several times with the engine off to displace the oil.
• 💧 Monitor the level in the tank, do not allow it to be completely empty while the engine is running.
• 🚫 Do not hold the steering wheel firmly for more than 5 seconds so as not to overload the pump.

Features of pumping the system

If there is still a hum after replacement, there may be air left in the system. To remove it, you need to turn the steering wheel from lock to lock several times with the engine running, pausing in extreme positions for no more than 3 seconds.

Important nuances and common mistakes

One of the most common mistakes is mixing different types of liquids. Even if you use a high-quality analogue, mixing it with the remnants of old oil can lead to a chemical reaction and sedimentation. Never mix liquids of different colors without first thoroughly flushing the system with distilled water or a special cleaner.

Another mistake is not checking the level after a ride. The fluid in the system expands when heated, so the level on a hot engine will be higher than on a cold one. Always check the level at the marks COLD and HOT on the dipstick or tank so as not to overfill or add less than normal.

It is also worth remembering the frequency of replacement. Although the manufacturer may claim a “lifetime” fluid life, real operating conditions (dust, temperature changes, traffic jams) shorten this life. It is recommended to replace every 60,000 kilometers or every 4-5 years.

Compatibility and characteristics table

To make it easier to choose a suitable liquid, we provide a comparative table of the main parameters and compatibility of products for Nissan Murano Z51.

Liquid type	Color	Viscosity (at -40°C)	Compatible with Z51
Nissan PSF-3 (Original)	Green/Red	High	✅ Perfect
ATF Dexron III	Red	Average	❌ Not recommended
PSF Universal (Liqui Moly)	Red	High	✅ Acceptable (with reservations)
Mineral oil	Yellow/Brown	Low	❌ Absolutely not

Answers to frequently asked questions (FAQ)

Below are answers to the most common questions from owners. Nissan Murano Z51 regarding maintenance of the power steering system.

Is it possible to add a liquid of a different color if the original one has run out?

Strongly not recommended. If there is little oil left in the system, it is better to add distilled water to temporarily compensate for the volume or urgently buy the right type. Mixing different chemicals can cause the oil to clot and cause pump failure.

How often does the power steering fluid need to be changed on a Murano Z51?

Despite statements about a “lifetime” resource, experts recommend changing the fluid every 60,000 km or every 4-5 years. In difficult operating conditions (frequent trips through mud, traffic jams), the interval should be reduced to 40,000 km.

What to do if after replacing the steering wheel begins to make noise?

Most likely there is air left in the system. Try to bleed the system: start the engine, turn the steering wheel from lock to lock (without holding it at the extreme points for more than 3 seconds) 10-15 times. If the noise continues, check the level and presence of leaks.

Can ATF be used instead of PSF-3 in an emergency?

Only in case of emergency, to get to the service, and no more than 100-200 km. Prolonged operation with ATF will destroy the rubber seals and cause leakage. After this, a complete flush of the system will be required.