Power Steering (Power Steering) Is a Critical Safety System in a Crossover Nissan Murano. Not only the ease of rotation of the steering wheel, but also the durability of expensive pump and steering rack components depends on the condition of the working fluid. Many owners Nissan Murano They mistakenly believe that the oil in the system does not require replacement, but this misconception can lead to expensive repairs.
Over time, hydraulic fluid loses its properties and becomes contaminated with metal shavings and wear products of rubber seals. As a result, the pump begins to make a characteristic hum, and the steering becomes heavy, especially at low speeds. Understanding the specifications and choosing the right lubricant is key to smooth, safe operation of your vehicle.
Types of fluids and their compatibility with Nissan Murano
Cars Nissan Murano different generations (Z50, Z51, Z52) are equipped with hydraulic systems that require strictly defined characteristics of the working environment. Most often, the manufacturer recommends using the original liquid Nissan PSF (Power Steering Fluid), which has a red or yellowish tint. However, there are also universal analogues suitable for use.
The key parameter is viscosity and a set of additives that protect rubber seals from destruction. Using the wrong formulation, such as automatic transmission fluid (ATF) without manufacturer approval, can cause the seals to swell and subsequently leak. It is important to understand the difference between mineral and synthetic compounds, since in the power steering system Nissan Murano Specific seals are used.
Here are the main types of fluids that are found on the market and may be considered for replacement:
- 🔴 Original
Nissan Genuine Power Steering Fluid- the best choice, guaranteeing full compatibility with system materials. - 🟡 Universal liquids
Pentosin CHF 11S- often used as a replacement, if this is permissible according to the instructions for a particular year of manufacture. - 🔵 Specialized analogues from brands Febi, Motul or Castrol with the "PSF" marking and confirmed compatibility with Japanese cars.
You should not save on choosing a product, since the cost of repairing a pump or rack significantly exceeds the price of a high-quality liquid. When purchasing, be sure to check the expiration date and integrity of the packaging, since the hygroscopicity of some compounds requires ideal storage conditions.
⚠️ Attention: Mixing liquids of different colors and manufacturers is strictly prohibited! This can lead to instant coagulation of the composition, sedimentation and failure of the power steering pump.
Diagnostics of the working fluid condition
Regularly checking the level and quality of oil in the power steering reservoir allows you to identify problems at an early stage. Owners Nissan Murano You should look under the hood every time you change your engine oil or at least once a season. The visual inspection process does not take much time, but provides comprehensive information about the health of the steering system.
To check, you need to find a translucent plastic tank, usually located on or near the pump body. There are marks on the tank body MIN And MAX. The fluid level should be between these marks when the engine is off. If the level drops below the minimum, you must urgently add oil and find the cause of the leak.
The color and smell of the liquid are also important diagnostic signs. New fluid is usually bright red or clear yellow. If you notice that the oil has darkened, become cloudy or has a black tint, this is a sure sign that the additives have worn out and the system is contaminated with wear products.
Pay special attention to the smell: the appearance of a burning smell indicates overheating of the liquid and possible jamming of the pump or overload of the system. Also, when checking, you can observe the presence of foam on the surface of the oil, which indicates air entering the system or a pump malfunction.
- 🔍 Check the level on a cold engine to get accurate data.
- 🔍 Inspect the surface of the liquid for the presence of an oil film or emulsion (a sign of water penetration).
- 🔍 Pay attention to the presence of mechanical impurities or metal shavings on the probe.
- Once a month
- Once every six months
- Only when I hear a hum
- Never checked
Step-by-step instructions for replacing fluid
Replacing power steering fluid with Nissan Murano is a procedure that can be performed independently with a minimum set of tools. The process requires care, since the work is carried out in the engine compartment, where there are a lot of wires and hoses under high pressure. It is recommended to carry out the replacement in an inspection pit or overpass for easy access to the drain hole.
Before starting work, be sure to prepare new fluid and rags. You will need about 1-1.5 liters of oil for a complete change, although the system contains approximately 1 liter. The replacement process can be carried out in two ways: partial replacement through draining or complete replacement using the displacement method, which gives a better result.
To complete the work you will need the following tools:
- 🔧 A set of wrenches and sockets for removing engine protection (if necessary).
- 🔧 A syringe or bulb for pumping out old fluid from the tank.
- 🔧 A container for draining used oil with a volume of at least 2 liters.
- 🔧 Funnel for convenient filling of new liquid.
If you choose the full replacement method, you will have to turn the steering wheel from lock to lock several times with the engine running to expel the old oil from the system. This requires the assistance of a second person or the use of wheel chocks for safety. The main rule is to constantly monitor the level in the tank, preventing it from being completely empty, otherwise air will enter the system.
☑️ Preparing to replace power steering fluid
⚠️ Attention: Never hold the steering wheel in the extreme position (stop) for more than 5 seconds while the engine is running! This creates extreme pressure in the system, which can damage pump seals or hoses.
Removing air from the system (bleeding)
After replacing the fluid, air often remains in the system, which manifests itself in the form of foam in the reservoir and a characteristic hum when the steering wheel is rotated. Air locks reduce the efficiency of the hydraulic booster and can lead to cavitation, which destroys the pump impeller. Therefore, the bleeding procedure is a mandatory maintenance step.
To remove air, start the engine and let it idle. Smoothly turn the steering wheel left and right all the way, pausing at the extreme points for 2-3 seconds. Repeat this operation 10-15 times. At the same time, monitor the fluid level and add it if necessary so as not to suck in air.
The process is considered complete when the foam in the reservoir disappears, the fluid level stabilizes, and the extraneous noise disappears when the steering mechanism operates. If the hum does not go away, you may need to recheck the system for leaks or diagnose the pump.
Why does the steering wheel still knock after bleeding?
If the knocking noise does not disappear after bleeding the air, the steering rack may be worn out or the pump mounts may have become loose. In some cases, it is necessary to replace the rack seals or repair the mechanism itself.
Common problems and their solutions
Owners Nissan Murano may encounter a number of common problems associated with the power steering system. The most common complaint is a pump noise that gets louder when you turn the steering wheel. This often indicates low fluid levels, air ingress, or worn pump bearings.
Another problem is the stiff steering wheel. If, when checking, the level is normal and the fluid is clean, the cause may be a malfunction of the pump itself (loss of pressure) or wear on the steering rack. It is also worth checking the tension of the drive belt; if it slips, the pump will not develop enough pressure.
Fluid leaks are an alarming sign that requires immediate attention. The source of the leak may be worn pump seals, cracks in high-pressure hoses, or steering rack seals. Ignoring even a small leak can lead to complete loss of fluid and destruction of the pump in a matter of minutes.
To diagnose problems, use a pressure gauge connected to the system to measure the actual pressure. Normal pressure readings for Nissan Murano are usually indicated in the service documentation and are about 80-100 bar depending on engine speed. Deviation from the norm requires repair or replacement of the unit.
Before purchasing a new pump, be sure to check the tightness of all hoses and connections. Often the cause of the noise lies in microcracks in the rubber tubes, and not in the pump itself.
Fluid compatibility and characteristics table
To make it easier to choose a suitable lubricant mixture, we have prepared a table with the main characteristics and recommendations. Use this information when purchasing oil for your Nissan Muranoto avoid compatibility errors.
| Liquid type | Color | Compatible with Murano | Replacement interval |
|---|---|---|---|
| Nissan PSF (Original) | Red | Full (Z50, Z51, Z52) | Every 60,000 km |
| Pentosin CHF 11S | Green | Only with approval (check the manual) | Every 80,000 km |
| ATF Dexron III / VI | Red | Not recommended (risk for seals) | — |
| Universal PSF (Febi) | Yellow/Red | Compatible (check approval) | Every 50,000 km |
| Castrol Power Steering Fluid | Red | Compatible with most models | Every 60,000 km |
Please note that using fluids not recommended by the manufacturer may void your steering warranty if the vehicle is still under warranty. Always check the official documentation or consult with your dealer before choosing an analogue.
Tips for extending the life of your power steering system
In order for the power steering system to serve for a long time and without failure, it is important to follow a few simple operating rules. Avoid frequently holding the steering wheel in extreme positions, as this creates peak loads on the pump and high-pressure hoses. This is especially true when parking or maneuvering on narrow streets.
Check the condition of the drive belt regularly. A loose or worn belt can slip, causing the fluid to overheat and make noise. Also keep the engine compartment clean: dirt and oil on the hoses can accelerate their aging and cracking.
When parking for long periods of time in the cold season, try to warm up the engine before driving. Cold fluid has increased viscosity, and it is more difficult for the pump to pump it, which increases wear. Smooth steering movements at the initial stage of movement also help preserve the resource of the system.
- 🛡️ Avoid sudden jerks with the steering wheel when driving on uneven roads.
- 🛡️ Monitor the integrity of the steering rack boots so that dirt does not get inside the mechanism.
- 🛡️ Completely replace the fluid every 40-60 thousand kilometers without waiting for symptoms of a malfunction to appear.
Regular maintenance and using original fluid is the most effective way to avoid costly repairs to the Nissan Murano steering system.
FAQ: Frequently asked questions
Is it possible to mix red and yellow power steering fluid?
No, it is strictly not recommended to mix liquids of different colors and manufacturers. Even if they appear similar in composition, differences in the additive package can lead to a chemical reaction, sludge formation and pump failure.
How often does the power steering fluid need to be changed on a Nissan Murano?
The manufacturer recommends replacement every 60,000 kilometers or every 4 years, whichever comes first. However, in difficult operating conditions (dust, hot climate, traffic jams), the interval should be reduced to 40,000 kilometers.
What to do if foam appears in the tank?
Foam in the reservoir indicates air has entered the system. This may be caused by low fluid level, damaged suction hose, or faulty pump seals. It is necessary to check the level, tightness and bleed the system.
Is Dexron ATF suitable for Nissan Murano?
Some older models of Japanese cars allowed the use of ATF, but for modern ones Nissan Murano This is not recommended. Use only specialized PSF fluids approved by the manufacturer to avoid damaging the system's rubber seals.
Is it difficult to change the fluid yourself?
Replacing power steering fluid is a moderately difficult task. It requires accuracy and a simple tool. If you are not confident in your abilities or are afraid of damaging the high-pressure hoses, it is better to entrust this work to professionals.