The fuel supply system is a critical component in the design of any modern vehicle, and Nissan Murano the second generation (Z51 body) is no exception. Reliable performance fuel pump guarantees stable engine starting, smooth running and no jerking during acceleration. However, over time, the resource of this device is exhausted, which can lead to serious problems along the way.
Crossover owners often encounter situations where the car starts to stall while driving or loses power. In most cases, the root of the problem lies precisely in the fuel module. It is important to understand that replacement fuel pump on Nissan Murano Z51 - this is a procedure that requires care and knowledge of the specific design of the tank in order to avoid errors during reassembly.
Reasons for failure of the fuel module
Long service life fuel pump directly depends on the quality of the fuel and the operating conditions of the vehicle. The most common cause of breakdown is fuel contamination, which leads to clogging of the coarse filter and overheating of the pump motor. When the pump operates in high resistance mode, it quickly loses its performance.
The second most popular factor is natural wear and tear of mechanical parts. The bearings and brushes of the electric motor wear out over time, which causes an increase in noise and a decrease in pressure in the fuel rail. Sometimes the problem lies in the electrical part - oxidation of contacts or damage to wiring can simulate a malfunction of the pump itself, although the unit itself is working.
The human factor cannot be ruled out, for example, regular movement on an “empty” tank. The fuel serves not only for combustion, but also for cooling the pump itself. If the level drops below a critical level, the pump motor will overheat and its service life will be reduced significantly. Constantly driving with low fuel levels is the main reason for the premature death of the pump on the Murano Z51.
- 🔥 Electric motor overheating due to low fuel level in the tank.
- 🧪 Contamination of the fuel system with low-quality gasoline.
- ⚡ Failure of a relay or fuse in the mounting block.
- 🛢 Worn filter element of the receiver mesh.
Fault diagnosis and pressure check
Before proceeding with dismantling and purchasing new spare parts, you must be sure of the exact cause of the malfunction. Symptoms may be similar to injector or pressure regulator problems. The surest way to check is to measure fuel line pressure using a pressure gauge. To do this, you will need to connect the device to the fitting on the fuel rail.
In a working system, the pressure should be in the range of 3.5 to 4.0 bar when the engine is running. If the readings are lower, this indicates poor pump performance or a clogged filter. It is also worth paying attention to the sound of the unit when the ignition is turned on. Normally, you should hear a characteristic buzzing sound for 2-3 seconds, after which the sound should stop.
If the pump hums too quietly or does not start at all, check the power at its terminals. Use a multimeter to check the continuity of the circuit. No voltage may indicate a blown fuse or faulty relay. In some cases, the problem lies in the connector, which oxidizes due to vibrations and temperature changes.
⚠️ Attention: Never try to check the functionality of the pump by applying voltage to it directly from the battery without connecting it to the fuel system. This may cause gasoline vapors to ignite!
Selection of original spare parts and analogues
When choosing a new fuel pump for Nissan Murano Z51 It is important to consider that there are many offers on the market, from original parts to cheap analogues. Original fuel module from Nissan guarantees compliance with all factory pressure and flow parameters. However, its cost can be quite high.
Analogs from trusted brands such as Bosch or Denso, are often a worthy replacement. The main thing is to make sure that the part number fully matches your engine (for example, VQ35DE). Low-quality fakes may not produce the required pressure, which will lead to loss of power and unstable engine operation at high speeds.
Pay attention to the package. In some cases, it is more profitable to change not only the pump itself, but also the entire module assembly, including the fuel level float sensor and filter. This will avoid having to dismantle the tank again in a couple of months due to sensor wear.
- ✅ Original Nissan — maximum reliability and service life.
- ⚙️ High-quality analogues Bosch - good value for money.
- ⚠️ Cheap Chinese copies - the risk of rapid breakdown and unstable operation.
- Every maintenance
- Once every 2 maintenance
- Only in case of breakdown
- I don’t know/I don’t change
Preparatory work before dismantling
Replacement fuel pump on Nissan Murano Z51 requires preparation of the workplace and tools. You will definitely need a jack, a set of wrenches (including socket wrenches 10 and 12), screwdrivers, and a container for draining remaining fuel. You should work in a well-ventilated area, away from sources of fire.
Before starting work, it is necessary to relieve the pressure in the fuel system. The easiest way is to locate the fuel pump fuse in the block (usually marked as FUEL PUMP), remove it and start the engine, letting it stall on its own. After this, you can remove the terminal from the battery to avoid a short circuit.
Access to the pump is through a hatch located under the rear sofa. Remove the rear seat cushion by unscrewing the mounting bolts or simply pulling it up, depending on the year of manufacture. Under the carpet you will find a plastic hatch cover that you need to carefully snap off.
☑️ Preparing to replace the pump
Step-by-step instructions for replacing the pump
After removing the hatch cover, you will see the fuel module flange secured with nuts. Carefully disconnect the electrical connector and fuel pipes. Be prepared for the fact that some gasoline may leak out of the pipes, so use a rag. Unscrew the locking nuts counterclockwise, being careful not to damage the threads.
Carefully remove the module from the tank. This must be done smoothly so as not to damage the fuel level sensor (float). If the pump does not come out due to sticking, you can pump it slightly, but do not use excessive force. Remove the old rubber seal and clean the seat.
Install new gasoline pump in reverse order. Make sure the new seal is level and fits tightly against the flange. Tighten the nuts in a crisscross pattern to ensure even pressure. Connect the fuel pipes until they click and connect the electrical connector.
⚠️ Attention: When installing a new pump, be sure to check the position of the fuel level sensor float. It should move freely and not cling to the tank walls or lid.
What to do if the pump does not rise?
If the module is stuck in the tank, it may have stuck to the walls or the float has hit the partition. Try to gently rock it from side to side without applying any sudden force. In extreme cases, it may be necessary to partially drain the fuel through the neck to make room for maneuver.
Checking the system after installation
After assembling all the components, you need to return the fuse to its place and connect the battery. Turn on the ignition for a few seconds without starting the engine. You should hear the pump pumping fuel. Repeat this procedure 2-3 times to fill the system with gasoline and remove any air pockets.
Now you can start the engine. It should start quickly, without failures. Carefully inspect the junction of the fuel pipes for leaks. If everything is in order, let the engine idle and check the operation in different modes.
If the machine is still unstable after replacing the pump, it may not be the only problem. It is worth checking the condition of the fuel filter, injectors and sensors. Also be sure to take it for a test drive to ensure there is no jerking during acceleration.
Before installing a new pump, it is recommended to flush the fuel tank from dirt and sediment if the car has a high mileage. This will extend the life of the new unit.
Technical characteristics and articles
To select the correct spare part, you need to know the exact characteristics of your car. Below is a table with the main parameters of fuel pumps for Nissan Murano Z51 with VQ35DE engine.
| Parameter | Meaning |
|---|---|
| Pump pressure | 3.5 - 4.0 bar |
| Performance | 120 - 140 l/hour |
| Original article | 17042-AL500 / 17042-JK000 |
| Analogue (Bosch) | 0 580 454 035 |
| Connector type | 4 pin |
- 🔧 Use only high-quality O-rings when replacing.
- ⛽ Refuel at proven gas stations with a high octane number.
- 🛠 Change the fuel filter regularly (every 60-80 thousand km).
Regularly replacing the fuel filter and monitoring the gasoline level in the tank can extend the life of the fuel pump by 2-3 times.
Frequently asked questions (FAQ)
How long does it take to replace a fuel pump?
If you have the necessary tools and experience, the procedure takes from 1 to 2 hours. If this is your first time, take more time to prepare and study the design.
Is it possible to change only the pump itself and not the entire module?
Technically this is possible, but it is often difficult to remove the old pump from the plastic module housing without damaging it. In addition, the fuel level sensor may be worn out, so replacing the entire module is considered a more reliable solution.
Why is the pump too loud?
Increased noise may indicate wear of the bearings, dry operation, or that the coarse filter is heavily clogged, creating increased resistance.
Do I need to code a new pump?
No, for Nissan Murano Z51 No fuel pump programming or coding required. It works normally immediately after connection.