Replacing the power steering pump on a Nissan Murano: a complete guide with photos and tips

Power steering (power steering) is a critical node in Nissan Murano, on which not only operating comfort, but also safety depends. The power steering pump, being the “heart” of the system, wears out over time: a hum occurs, the steering wheel turns stiffly, or fluid leaks appear. If you encounter similar symptoms, replacing the pump is just a matter of time. In this article we will analyze all stages of the procedure: from diagnostics to installation of a new unit, including selection of spare parts, necessary tools and unique nuances for Murano Z50/Z51 (2003–2014).

Self-replacement of the power steering pump with Murano - a task of medium complexity that requires accuracy and basic repair skills. A car service center will charge from 8 to 15 thousand rubles for such work (depending on the region), while the pump itself will cost 12–25 thousand. You can save money, but it is important to understand: mistakes when replacing are fraught rack damage or air entering the system. We will describe each step in detail so that you can assess your strengths and avoid common problems.

Signs of a faulty power steering pump on a Nissan Murano

The power steering pump rarely fails suddenly - usually the malfunction appears gradually. Here are the key symptoms that indicate the need for replacement:

• 🔊 Hum or squeal when turning the steering wheel, especially at low engine speeds. The sound may become louder in cold weather.
• 💦 Power steering fluid leaks under the hood (red or brown fluid near the pump or hoses). On Murano The pump O-ring often leaks.
• 🔄 Stiff steering wheel rotation in one direction (for example, only to the left) or jerking when turning.
• 🚨 Extraneous noise from under the hood with the engine running, even if the steering wheel is not turned (may indicate wear on the pump bearing).
• 🔥 Power steering fluid overheating - if the tank is hot to the touch and the liquid has darkened, the pump is overloaded.

On Nissan Murano with engines VQ35DE (3.5 l) and VQ25DE (2.5 l) power steering pump has a similar design, but the hose mountings are different. For example, on models after 2010 (Z51) there may be a pump with a different pressure sensor connector. Before purchasing spare parts be sure to check the VIN code or year of manufacture of the car.

⚠️ Attention: If you hear a grinding or metallic clanging sound when you turn the steering wheel all the way, the problem may not be in the pump, but in power steering rack. In this case, a comprehensive diagnosis is required.

Which power steering pump to choose for Nissan Murano?

Original power steering pump for Murano has an article number 49100-4M000 (for models before 2010) or 49100-4M00A (after 2010). The cost of a new original is from 20 thousand rubles. However, there are high-quality analogues on the market:

Brand	Article	Price, ₽	Features
Nissan (original)	49100-4M00A	20 000–25 000	12 month warranty, fully compatible
Aisin	PSN001	15 000–18 000	Japanese quality, often installed on the assembly line
ZF (ruler TRW)	780 0011 10	14 000–17 000	Good resource, but may require modification of fasteners
Febi	33310	10 000–12 000	Budget option, suitable for temporary replacement

When choosing a pump, pay attention to:

• 🔧 Belt type: on Murano poly V-belt is used 4PK915 (length 915 mm). Some pumps come without a pulley - you will have to replace it with the old one.
• 🔌 Presence of a pressure sensor: On models after 2008, the sensor is integrated into the pump. If you buy a used unit, check its functionality.
• 🛢️ Fluid compatibility: for Murano recommended Nissan PSF (article KE902-99932) or analogues (Mobil ATF 220, Castrol Transmax Dex III).

If you are buying a used pump, be sure to check:

• 🔍 Shaft play - there should be no gaps or jams.
• 🔄 Ease of rotation — the pulley should turn without effort (with the belt removed).
• 💧 Traces of liquid on the body - indicate wear of the seals.

Tools and materials for replacing the power steering pump

To replace the power steering pump with Nissan Murano you will need:

Set of sockets and wrenches (10, 12, 14 mm)|Ratchet handle and extension|Pulley puller (or mounting paddle)|Pliers and round nose pliers|New power steering fluid (1–1.5 l)|Rag and container for draining old fluid|Thread sealant (e.g. Loctite 577)|Torque wrench (optional)-->

Also prepare:

• 🔧 New power steering belt (if the old one is worn out or cracked).
• 🧴 Carburetor Cleaner - to flush the system from old fluid.
• 📏 Vernier caliper - to measure the diameter of the hoses when replacing.

If you are planning complete replacement of power steering fluid, the system will need to be flushed. To do this:

1. Drain the old fluid from the reservoir and hoses.
2. Fill in new fluid and turn the steering wheel all the way in both directions (engine off!).
3. Repeat the procedure 2-3 times until the liquid is clear.

⚠️ Attention: On Murano with the system VDC (stability control) when replacing the power steering pump it may be necessary error reset through a diagnostic scanner. Without this, the steering wheel may “stick” at low speeds.

Step-by-step instructions for replacing the power steering pump

The process of replacing the power steering pump with Nissan Murano takes 3–5 hours (depending on experience). Follow the instructions strictly in order:

1. Preparing and draining the liquid

Park the car on a level surface and disconnect the battery (remove the negative terminal). Next:

1. Remove the engine protection (if equipped).
2. Unscrew the cap of the power steering reservoir and pump out the fluid with a syringe or bulb.
3. Loosen the clamps on the hoses going to the pump and drain the remaining liquid into a container.

2. Dismantling the belt and pulley

To remove the power steering belt:

1. Loosen the tension roller (14 mm wrench).
2. Remove the belt from the pulleys.
3. Secure the pump pulley from turning (you can use a puller or mounting blade) and unscrew the fastening bolt (17 mm socket).

3. Removing the pump

Disconnect:

• 🔌 Electrical connector for pressure sensor (if available).
• 🔧 Two bolts securing the pump to the bracket (12 mm head).
• 🛢️ High and low pressure hoses (mark them first so as not to confuse them during installation!).

Carefully remove the pump. Please note gasket between pump and bracket — it is better to replace it with a new one.

4. Installation of a new pump

Before installation:

• 🔄 Check the rotation of the new pump shaft - it should be smooth.
• 🛠️ Move the pulley from the old pump (if you bought it without it).
• 🧴 Apply a thin layer of sealant to the threads of the fastening bolts.

Install the pump in reverse order. Important: High pressure hoses must be tightened firmly 25–30 Nm, otherwise leaks may occur.

5. Filling the system and bleeding

After installation:

1. Fill with new power steering fluid to the mark MAX in the tank.
2. Turn the steering wheel all the way left and right (engine off) - this will help squeeze out the air.
3. Start the engine and repeat the procedure. Add liquid as it goes down.
4. Check that there is no air in the system: the liquid should not foam when the engine is running.

Typical mistakes when replacing a power steering pump

Even experienced craftsmen sometimes make mistakes that lead to re-repair or system damage. Here's what not to do:

• 🚫 Use old power steering fluid — it contains wear products that will quickly damage the new pump.
• 🚫 Retighten the hoses - this leads to their cracking. Tightening torque: 25–30 Nm for high pressure, 15–20 Nm for return.
• 🚫 Ignore system bleeding — air in the power steering causes cavitation and accelerated wear of the pump.
• 🚫 Install the pump without checking the pulley — pulley runout of more than 0.5 mm leads to vibrations and oil seal leakage.

Another common problem is fluid incompatibility. For example, if the system was previously flooded with Dexron III, and you added PSF, sediment may form and clog the tank filter. Always use the fluid recommended by the manufacturer.

What should I do if after replacing the pump the steering wheel becomes heavier?

If the steering wheel is difficult to turn after replacing the pump, check:

1. **Liquid level** - it may not be enough.

2. **Presence of air** - bleed the system again.

3. **Rack condition** - if the pump is new and the problem remains, the power steering rack or its bushings may be worn out.

4. **Belt tension** - low tension leads to slippage and loss of pressure.

If all else fails, check the power steering pressure sensor - it may be faulty.

Cost of replacing the power steering pump at a service center vs doing it yourself

Prices for replacing the power steering pump in car services vary depending on the region and level of the service station:

Service type	Cost of work, ₽	Lead time	Warranty
Official dealer Nissan	12 000–18 000	4–6 hours	12–24 months
Specialized service (power steering/hydraulics)	8 000–12 000	3–4 hours	6–12 months
Universal service station	6 000–10 000	4–5 hours	3–6 months
Self-replacement	0 (spare parts only)	5–8 hours	—

Replacing it yourself allows you to save on work, but requires care. For example, if you make a mistake with the hose tightening torque or incorrectly bleed the system, you may need to re-repair, which will cost more. If you are not confident in your abilities, it is better to turn to professionals.

On the other hand, many owners Murano successfully change the power steering pump with your own hands. The main thing is take your time and follow the instructions. For example, on forums they often advise before installing a new pump flush the system special liquid (for example, Wynns Hydraulic System Flush) to remove deposits.

FAQ: Frequently asked questions about replacing the power steering pump on a Nissan Murano

Is it possible to drive with a faulty power steering pump?

Technically possible, but highly undesirable. Tight steering increases the risk of losing control of the vehicle, especially at high speeds. In addition, a worn pump can completely seize, which will lead to belt breakage and loss of amplifier. If the pump hums or leaks, replace it as soon as possible.

How often should you change your Murano's power steering fluid?

The manufacturer recommends replacement every 60,000 km or once every 3 years. However, if the fluid is darkened or metal shavings are visible in it, replace it immediately - this is a sign of wear on the pump or rack. On Murano with a mileage of more than 150,000 km, it is better to reduce the replacement interval to 40,000 km.

What is the difference between power steering pumps for Murano Z50 and Z51?

Main differences:

• On Z51 (2011–2014) the pump can be equipped with integrated pressure sensor, whereas on Z50 (2003–2010) the sensor is often remote.
• High pressure hose mountings may vary (depending on Z51 quick-release fittings are used).
• On models with VDC (stability control system) the pump may have an additional connector for communication with ECU.

Please check before purchasing VIN code car or check the catalog by year of manufacture.

Is it possible to replace the power steering pump with an electric power steering pump?

Theoretically it is possible, but in practice it is complex and expensive tuning. You will need:

• Replacing the rack with a model with an electric power steering (for example, from Nissan Rogue).
• Flashing ECU to turn off the hydraulics.
• Manufacturing of transition brackets.

The cost of such refurbishment may exceed 100,000 rubles, and the result does not always live up to expectations. It is much easier and cheaper to maintain a standard power steering in working condition.

How to check the operation of the power steering pump after replacement?

After installing the new pump:

1. Start the engine and let it idle for 1-2 minutes.
2. Check the fluid level in the tank - it should not fall.
3. Turn the steering wheel all the way left and right: the efforts should be uniform, without jerking.
4. Listen to the pump - there should be no hum, squeaking or knocking.
5. Check hoses for leaks.

If everything is in order, drive 5–10 km and re-inspect the system. Please note tank temperature - if it overheats, the pump may be overloaded.