Power steering oil for Nissan Murano Z51: selection, replacement and standards

Crossover control system Nissan Murano the second generation (Z51 body) is highly responsive, which directly depends on the condition of the fluid in the power steering. Owners often ignore this unit until a characteristic hum or knock appears, but timely replacement of lubricant can extend the life of the pump and rack by tens of thousands of kilometers. Properly selected oil ensures smooth operation and safety when maneuvering at high speeds.

A special feature of the Z51 platform is that the manufacturer uses specific requirements for hydraulic fluid, which are often confused with conventional gear oils. Using the wrong compound can cause rapid wear of the rubber seals and overheating of the system. In this article we will look at what kind of oil was filled from the factory, what analogues exist, and how to carry out the maintenance procedure correctly without risk to the car.

Fluid specifications and tolerances for Murano Z51

Manufacturing plant Nissan Motor Co. prescribes the use of original fluid PSF (Power Steering Fluid). This is not just hydraulic oil, but a specialized mixture with additives that prevent oxidation and corrosion of the metal components of the pump. In the spare parts catalogs you will find it under the article number KZ000-00100. It is important to understand that the color of this fluid is usually red, which creates confusion with ATF, but the chemical composition is different.

Many owners mistakenly believe that any red liquid such as ATF Dexron III can be poured into the system. This is a big mistake. While some Dexron-based alternatives may work temporarily, they do not provide the desired level of foam protection and do not have the desired low temperature viscosity. For Nissan Murano Compliance with tolerances is critical, otherwise the pump will begin to work under increased load.

If the original product is difficult to find, it is allowed to use high-quality analogues that meet the specifications PSF or CHF 11S (in some modifications). However, before replacing, it is necessary to check the condition of the seals: if they are already tarnished from old oil, switching to a different type of fluid may cause leaks. In the Z51 system, mixing red and green liquids is strictly prohibited, as this will lead to sedimentation and blockage of the channels.

Consumption and replacement intervals

Fluid volume in the power steering system Nissan Murano Z51 is about 0.8–1.0 liters depending on the condition of the system and the presence of air locks. A planned replacement usually takes from 0.7 to 0.8 liters, so one 1-liter canister is enough for one-time maintenance. However, when completely flushing the system, up to 2 liters may be required to displace the old composition.

The manufacturer does not indicate strict replacement regulations, believing that the liquid lasts “forever”. Real operating practice shows that every 40–50 thousand kilometers the oil loses its properties, darkens and acquires a burning smell. If you experience noise or vibration on the steering wheel when turning, you should immediately check the color and level of the fluid in the reservoir.

• 🔴 Red color — perfect condition, no replacement required (if there is no noise).
• 🟤 Dark brown color — The oil has oxidized and needs to be replaced as soon as possible.
• ⚫ Black color with sediment — critical condition, complete flushing and replacement of seals is required.

Ignoring scheduled replacement results in small metal particles and wear debris beginning to circulate throughout the system, acting as an abrasive. This accelerates wear on the pump plunger pairs and can lead to rack jamming. Regular checking of the level and condition is the key to the longevity of the unit.

Replacement procedure: step-by-step instructions

Changing the oil in the power steering Nissan Murano The Z51 does not require complex special equipment, but it does require precision. The procedure can be performed independently in a garage environment. First, you need to raise the front of the car on a lift or pit so that the wheels rotate freely. Open the hood and locate the expansion tank located on the power steering pump.

First you need to pump out the old fluid from the tank. Use a medical syringe with a tube or a special bulb. Try to pump out as much oil as possible without damaging the level sensor or the float inside the reservoir. After this, disconnect the lower hose going from the pump to the power steering radiator (if there is one) and plug it so that the fluid does not flow into the sump.

• 🔧 Prepare the container for draining old waste with a volume of at least 1 liter.
• 🔧 Clean the tank from dirt and deposits before adding new fluid.
• 🔧 Check the hoses for cracks and leaks at joints.

Fill with new fluid to the maximum level. Then start the engine and let it idle. Turn the steering wheel left and right as far as it will go several times to bleed the system and remove air. Keep an eye on the level in the tank - it will drop, so you need to constantly add fluid to the norm.

Bleeding the system and removing air

Air locks in the power steering system are a common cause of noise and jerking of the steering wheel. After adding new fluid, be sure to perform the bleeding procedure. Start the engine and slowly rotate the steering wheel from lock to lock, pausing at the extreme points for 2-3 seconds. Do not hold the steering wheel in the extreme position for more than 5 seconds to avoid overheating the pump.

Repeat this procedure until the fluid level stops falling and air bubbles stop emitting from the reservoir. If the noise persists after several cycles, air may have entered the line through leaks. In this case, check all connections and tighten the clamps.

⚠️ Attention! Never turn the steering wheel all the way with the engine off. This creates enormous pressure, which can damage rubber seals or cause hoses to rupture.

After making sure that the system operates quietly, place the wheel in a straight position and check the fluid level again. If necessary, top up to the mark MAX on a cold engine. Start the car and drive a few kilometers, then check the level again - it should stabilize.

Common errors and diagnostics

One of the most common mistakes is using transmission fluid. ATF Dexron II or Dexron III instead of specialized oil. Although they are visually similar, their viscosity and additive package are not suitable for pumps Nissan. This can lead to accelerated wear of the rotor blades and the appearance of a hum after 10 thousand kilometers.

Another problem is mixing different types of liquids. If you don't know what's in the tank, it's best to flush the system completely. Mixing mineral and synthetic oils can cause the fluid to coagulate (clump), causing filters and passages to become clogged. This is especially true for older vehicles where the service history is unknown.

• ❌ Pump overheating due to low fluid level or clogged filter.
• ❌ Forgetfulness when topping up, the level should be between MIN and MAX.
• ❌ Ignoring noise — the first signs of a malfunction are always heard at idle.

If the hum does not disappear after changing the oil, the problem may be in the pump itself or the rack. In this case, diagnostics is required at a specialized stand. Sometimes replacing the pump seals helps, but often a complete replacement of the unit is required.

Comparison of oils and analogues

The choice between original oil and analogues often causes controversy. Original liquid Nissan ideally balanced for operation in a wide temperature range, which is important for the Russian climate. However, high-quality analogues are also capable of ensuring reliable operation of the system, provided that they are selected correctly.

The table below provides a comparison of the main characteristics of popular fluids used by owners Murano Z51:

Please note that green fluids (CHF) are used in some modern vehicles, but for Murano Z51 is the most commonly recommended red compound. Always check the service book or spare parts catalogs before purchasing.

Frequently asked questions and answers

Owners Nissan Murano Frequently asked questions about servicing the power steering system. Below we have collected answers to the most popular of them, based on operating experience and manufacturer recommendations.