Power steering fluid Nissan Murano Z50: a complete guide to selection, replacement and maintenance

Crossover steering system Nissan Murano The first generation (Z50 body) is one of the most loaded components of the car. When operating on Russian roads with their uneven surfaces and frequent steering turns, the hydraulic system experiences enormous loads. Ease of control and safety on the road depend on the quality and timely replacement of the working fluid.

Many owners Nissan Murano encounter the problem of a hum when turning the steering wheel or difficulty moving the steering wheel. Often this is a direct signal that the hydraulic fluid has lost its properties or the level has dropped below a critical level. Ignoring such symptoms can lead to failure of the power steering pump or the steering rack itself, which will entail costly repairs.

In this article we will analyze in detail which liquid is suitable for Nissan Murano Z50, how to correctly determine its current condition and independently carry out the replacement procedure. We will also look at the nuances of flushing the system and common mistakes that motorists make when servicing this unit.

Technical requirements and operating environment specification

For the correct operation of the vehicle's hydraulic system Nissan Murano Z50 the manufacturer prescribes the use of special fluids that meet strict quality standards. Unlike simple cars, where universal oils can be used, the system Nissan Compliance with the chemical composition of the lubricant is critical to avoid destruction of rubber seals and seals.

Official Specification Nissan for all models with hydraulic power steering - this is liquid Nissan PSF (Power Steering Fluid). It is red in color and has unique viscosity characteristics that persist over a wide temperature range. The use of analogues is possible, but they must strictly comply with the specification JWS 3309 or have approval from the manufacturer.

Owners often wonder whether it is possible to mix different brands of liquids. It is strictly not recommended to mix liquids of different colors or from different manufacturers without completely flushing the system. Chemical incompatibility can cause sediment to form, which will clog the pump filter screen and cause it to overheat.

Popular analogues and manufacturer's choice

Although the original liquid Nissan PSF is an ideal option; there are high-quality analogues on the market that often offer a more attractive price while maintaining the same characteristics. It is important to choose products from trusted brands that specialize in hydraulic fluids for Japanese cars.

• 🔴 Prestone PSF - a popular analogue, fully compatible with systems Nissan and Toyota, has excellent anti-corrosion properties.
• 🔴 Idemitsu PSF - product from one of the suppliers Nissan, often found in original packaging, but at a more affordable price.
• 🔴 Febi 32228 - German quality, meets the standard JWS 3309, ideal for replacement in Murano Z50.

When choosing a liquid, pay attention to the packaging. Original canister Nissan has clear markings and a security hologram. Fake oils often have blurred fonts or incorrect color of the liquid itself. Buy consumables only from authorized dealers or large online spare parts stores.

Using low-quality oil can cause the pump to emit a characteristic whine even under minimal loads. This is the first sign that the pump bearings are wearing out due to lack of lubricant film. Therefore, saving on choice power steering fluids - This is a direct path to a major overhaul.

Replacement intervals and signs of wear

In technical documentation Nissan Murano It is often indicated that the fluid in the power steering system is filled “forever”. However, actual operating experience shows that this formulation is applicable only to ideal conditions. In our realities, replacement is necessary every 40-60 thousand kilometers or once every 3-4 years.

Signals that it is time to service the system do not appear immediately. First, the color of the liquid changes from bright red to dark brown or black. This indicates that the oil has oxidized and is filled with metal and rubber wear products. There may also be a burning smell.

It is important to regularly check the fluid level through the transparent expansion tank. If the level drops, this may indicate a leak in the system. Check the high and low pressure hoses, as well as the pump and steering gear seals. Even a small leak can allow air to enter the system.

⚠️ Attention: If the fluid level has dropped below the minimum mark, it is strictly forbidden to start the engine and turn the steering wheel. This will instantly damage the pump due to dry running and cavitation.

Self replacement procedure

Changing the fluid in Nissan Murano Z50 does not require complex specialized equipment, but requires accuracy and time. The process includes draining the old fluid, flushing the system and filling in new fluid. To work, you will need new fluid, a syringe or bulb for pumping, a container for draining and a set of keys.

The first step is to disconnect the return hose (drain) from the expansion tank and lower its end into a container. Then you need to remove the fuse from the power steering pump (usually it is located in a block under the hood marked PS or EPS, but in the Z50 it's the hydraulic pump, so check the fuse box in the engine bay). Start the engine and turn the steering wheel from lock to lock until clear fluid comes out, and then turn off the engine.

After this, you need to drain the residue from the tank using a syringe. Remove the supply hose from the pump, plug it with a plug or finger to prevent liquid from spilling out of the pump. Connect the supply hose to the new fluid container and start the engine to bleed. This will speed up the process of displacing old fluid.

Features of system bleeding and air removal

One of the most critical stages of replacement is removing air from the hydraulic system. An air lock can cause noise, vibration in the steering wheel, and loss of steering effort. The pumping procedure must be carried out strictly according to technology, otherwise you risk damaging the pump.

To remove air, you need to turn the steering wheel several times from the extreme left position to the extreme right and back. This should be done slowly, without sudden jerks, holding the steering wheel at the extreme points for 2-3 seconds. In this case, the engine should be running at idle speed.

Monitor the fluid level in the expansion tank while pumping. It must always be between the marks MIN and MAX. If the level drops, add fluid, otherwise the system will air again. Repeat the procedure until the air bubbles in the tank disappear and the noise stops.

What should I do if the pump continues to hum after replacement?

If, after proper replacement and bleeding, the pump continues to hum, it may already be mechanically worn out. Bearing or rotor wear cannot be corrected by changing the oil. In this case, the power steering pump assembly will need to be replaced or overhauled.

Features and Compatibility Table

For ease of selection of consumables and understanding of technical requirements, below is a summary table of characteristics applicable to the system Nissan Murano Z50.

Parameter	Meaning/Requirement
Liquid type	ATF / PSF (Power Steering Fluid)
Original article	KE909-99945 (Nissan PSF)
Liquid color	Transparent Red
System volume (with replacement)	About 0.9 - 1.0 liters
Compatibility	JWS 3309, ATF Dexron III (with caution)

Please note that the amount of fluid required for a complete replacement may vary slightly depending on the year of manufacture and the condition of the hoses. It is recommended to buy 2 liters in order to have a reserve for refilling or flushing.

Common mistakes and important warnings

When servicing the power steering system on Nissan Murano Many owners make mistakes that shorten the service life of units. The most common mistake is using automatic transmission fluid (ATF) without checking compatibility. While many ATFs are suitable, some modern synthetic oils can be aggressive to older style oil seals.

Never hold the steering wheel in the extreme position (stop) for more than 5-7 seconds. This creates extreme pressure in the system, which can rupture high-pressure hoses or overheat the pump. In the system Nissan Z50 A safety valve is installed, but its life is limited.

⚠️ Attention: It is prohibited to use universal power steering oils that are not approved by Japanese manufacturers. This can lead to swelling of the rubber seals and subsequent rupture of the high pressure hoses when heated.

It's also worth remembering the temperature. In winter, thickened liquid creates an increased load on the pump when first started. If you use low-quality oil, it may freeze at -30°C, causing the pump drive belt to break or the pulley to fall off.

Final recommendations for maintenance

Regular maintenance of the power steering system is the key to comfortable and safe driving of the crossover Nissan Murano Z50. Do not expect any extraneous sounds or steering wheel vibrations. A scheduled fluid change every 40 thousand kilometers will extend the life of the pump and steering rack for many years.

Choose only proven brands and original consumables. Skimping on fluid often results in repairs that are 10-15 times the cost of an oil change. If you are not confident in your abilities, entrust this procedure to professionals, but know that the procedure is not overly complicated and can be done by a car enthusiast with a basic set of tools.

What is the original fluid for the Nissan Murano Z50?

The original liquid is Nissan PSF with article number KE909-99945. It is red in color and meets a specification developed specifically for Nissan control systems.

Is it possible to add fluid from another manufacturer?

It is allowed to add only approved fluid JWS 3309 or similar from the manufacturer. The liquid should be the same color (red). Mixing different types may cause a chemical reaction and damage.

How often should the power steering fluid be changed?

It is recommended to replace it every 40,000 - 60,000 kilometers or every 3-4 years of operation, even if the fluid visually looks normal.

Why does the power steering pump hum after replacement?

Most often the reason is the presence of air in the system. It is necessary to repeat the pumping procedure (scrolling the steering wheel from lock to lock). If the hum does not go away, the pump itself may be worn out.