Crossover operation Nissan Murano second generation (body Z51) requires regular attention to engine power systems. Exactly air filter plays a key role in ensuring the correct ratio of fuel and air, which directly affects the dynamics and service life of the engine. Ignoring the timing of its maintenance can lead to serious damage to an expensive unit.
Owners often underestimate the importance of this part, considering it a low priority consumable. However, for naturally aspirated V6 engines installed on Murano Z51, the cleanliness of the incoming air is critical. Clogged filter restricts flow, causing the electronic injection control system to operate abnormally, which increases fuel consumption and reduces power.
VQ series engines, which were installed on Nissan Murano generation Z51, are highly sensitive to the quality of the air mixture. These units are designed for high rpm and require precise air dosage to maintain ideal combustion. Any intake restriction caused by a dirty filter element immediately affects the vehicle's performance.
Many car owners are faced with the fact that the car begins to “stupid” when accelerating, although previously it worked like a clock. The reason is often the lack of maintenance of the ventilation and filtration system. Regular replacement allows you to avoid problems with mass air flow sensors and the EGR valve, which very often become clogged with soot due to improper mixture formation.
Body Feature Z51 is a compact engine compartment where the filter element is located in an accessible place, but requires care when dismantling. It is important to understand that the original part and cheap analogues may have different geometries and degrees of filtration. Choosing a low-quality product can lead to abrasive particles getting into the cylinders, causing accelerated wear of the piston group.
Design features and purpose of the filter
In the intake system Nissan Murano Z51 The air filter not only performs a cleaning function, but also serves as part of the noise reduction. The filter housing is designed to dampen acoustic vibrations created by air intake from a turbine or piston group. This ensures a comfortable driving experience, as the sound of the engine does not penetrate the cabin at excessive volume.
The filter element itself is made of special corrugated paper or synthetic fiber impregnated with oil to capture fine dust. The surface area of such an element significantly exceeds the area of the intake tract opening, which allows the required volume of air to pass through without creating strong resistance. Filtration efficiency directly depends on the condition of the material and the absence of mechanical damage.
It is important to note that in the design Murano A filter housing with rubber seals is used, which over time can harden and lose elasticity. If the seal does not seal tightly to the housing, unfiltered air begins to enter the engine, bypassing the main paper element. This phenomenon is called “suction” and is one of the main reasons for accelerated engine wear with a seemingly working filter.
Signs that replacement is needed
You can determine that the filter has become unusable both visually and by changes in the behavior of the car. The most obvious sign is loss of power when accelerating. The driver notices that the gas pedal is pressed, but the engine response becomes sluggish, especially when overtaking or driving uphill.
It is also worth paying attention to the change in color of the exhaust gases. If there is not enough air, the mixture becomes rich, which leads to the formation of black smoke from the exhaust pipe. This is a sure sign that the filter is clogged and does not allow sufficient oxygen to pass through for complete combustion of the fuel. In addition, fuel consumption may increase as the electronics try to compensate for the lack of air by changing injection parameters.
Another warning sign may be unstable idle speed. The engine may run intermittently, the tachometer needle may “float” or vibrations may appear on the body. In some cases, the Check Engine icon lights up on the dashboard, indicating an error in the air intake system or mixture. In this case, it is necessary to carry out diagnostics with a scanner, but often the problem is solved by simply replacing the consumable.
⚠️ Warning: Do not attempt to blow out or wash the paper filter with water or compressed air. This destroys the fiber structure and reduces filtration efficiency, allowing dirt to enter the engine.
- Up to 50,000 km
- 50,000 - 100,000 km
- 100,000 - 150,000 km
- More than 150,000 km
The choice between the original and analogues
When choosing an air filter for Nissan Murano Z51 Many owners are faced with a dilemma: take an original part or save on a proven analogue. Original from Nissan guarantees perfect fit to size, quality of sealing rubber and declared degree of filtration. This is the safest option for those who plan to operate the car for many years without major intervention in the engine.
However, there are high-quality manufacturers on the market offering analogues that are not inferior to the original, and sometimes even exceed it in terms of service life. Brands that specialize in filtration often use denser material or improved pleat design. The main condition when choosing an analogue is to check the catalog number and carefully examine the seats and seals.
- ✅ Original (Nissan): Perfect fit, guarantee of material quality, high price, risk of counterfeiting.
- ✅ Knecht/Mahle: German quality, often used as original supplier, excellent filtration.
- ✅ Filterman:
When purchasing, it is important to inspect the filter element for defects. The corrugation should not have cracks, and the sealing rubber should be soft and elastic. If the rubber is hard or crumbles when pressed, it is better not to install such a filter, as it will not ensure the tightness of the housing. Sealing quality is just as important as the quality of the paper itself.
Instructions for self-replacement
Replacing the air filter with Nissan Murano Z51 - a procedure that can be performed independently in a garage or even on the side of the road. All you need to do the job is a Phillips screwdriver and maybe a flashlight. The whole process takes no more than 15 minutes and does not require special knowledge of the car.
First you need to open the hood and find the air filter housing. It is located on the right side (in the direction of travel), closer to the front fender, and is a black plastic box. Open the case cover by unfastening the latches or unscrewing the screws, depending on the year of manufacture. Be careful not to damage the plastic latches when removing the cover.
☑️ Preparation for replacement
Remove the old filter and carefully inspect the inside of the housing. Often leaves, sand or small insects accumulate there. Be sure to remove all debris using a damp cloth or vacuum cleaner. If dirt remains inside, it will enter the engine immediately after installing the new filter. Make sure the seal groove is clean and dry.
Install the new filter in the correct direction. Usually an arrow or inscription on the filter indicates the direction of air flow. Carefully insert it into the housing, making sure that the edges fit snugly against the seal. Close the cover until the latches click or the screws are fully tightened. Check for any gaps between the cover and the body.
⚠️ Attention: If after replacing the engine a whistle appears during operation, most likely the housing cover is not closed tightly or the filter is installed crookedly. Fix it immediately.
What to do if the screws are stuck?
Use penetrating lubricant (WD-40), apply it to the threads and wait 5-10 minutes. Do not use excessive force to avoid stripping the threads in the plastic housing.
Technical characteristics and articles
To select the correct part, you need to know the original catalog number. For Nissan Murano Z51 with VQ35DE or VQ35HR engines the main article is 16546-ED00A (or its modifications depending on the market). There are also numbers 16546-31U00 and 16546-ED01A. Always check your vehicle's VIN before purchasing, as design changes may have been made over different years of production.
Below is a table with the main characteristics of the original filter and popular analogues that have proven themselves in the market:
| Manufacturer | Article | Material | Recommended replacement interval |
|---|---|---|---|
| Nissan (Original) | 16546-ED00A | paper | 15,000 - 20,000 km |
| Knecht/Mahle | LX 1037 | Heavy paper | 20,000 - 25,000 km |
| Filterman | AF-3520 | Synthetic/Paper | 15,000 - 20,000 km |
| Denso | DFA-0201 | paper | 15,000 - 20,000 km |
Please note that the replacement interval may vary depending on operating conditions. If you often drive on dusty roads, in traffic jams or in highly dusty conditions in the city, you should change the filter more often than specified in the regulations. Reducing the interval in severe operating conditions, this is an investment in the long life of the engine, which will pay off in the absence of expensive repairs.
Regularly checking the condition of the filter and replacing it at the first sign of contamination is the most effective way to extend the life of the VQ35 engine without unnecessary costs.
Impact on fuel consumption and ecology
The condition of the air filter directly correlates with the efficiency of the car. When the filter is clean, the engine receives the optimal amount of air and the injection control system maintains the ideal fuel-to-air ratio (stoichiometric mixture). This ensures maximum combustion efficiency and minimum fuel consumption.
A clogged filter upsets this balance. The electronic control unit (ECU) detects a lack of air according to the mass air flow sensor (MAF) or absolute pressure sensor (MAP). To prevent a lean mixture and loss of power, the ECU increases the fuel supply. As a result, combustion becomes incomplete, fuel consumption increases, and the toxicity of exhaust gases increases.
In addition, a dirty filter can cause rapid failure of the catalyst. Due to the rich mixture, unburned fuel enters the exhaust system, where it is burned in the catalyst. This leads to its overheating and melting of the cells, which requires expensive replacement. Environmental safety your vehicle also depends on the condition of simple consumables.
⚠️ Attention: Do not buy filters “by hand” or without packaging. Counterfeits often have low quality seals and a porous structure, which does not provide adequate engine protection.
When replacing the filter, it is also recommended to check the condition of the intake tract pipes for cracks and the tightness of the clamps.
Frequent maintenance errors
Despite the simplicity of the procedure, many owners make common mistakes that negate the benefits of the replacement. One of the most common problems is neglecting to clean the case. By installing a new filter in a dirty box, you immediately contaminate it with dust and sand remaining inside. This creates the effect of an “old filter” from the first day of operation.
Another mistake is not installing the filter correctly. If the filter is inserted crookedly or not completely, a gap will form between the housing and the filter element. Through this gap, unfiltered air enters the engine, bypassing the main cleaning. This is especially dangerous when driving off-road or on dusty roads, where the concentration of abrasive particles in the air is very high.
Some drivers try to extend the life of the filter by using impregnations or aerosols to restore the properties of the paper. For paper filters that are installed on Murano Z51, this is unacceptable. Chemical reagents can destroy the fiber structure or change permeability parameters, which will lead to unpredictable consequences for the engine. The only right way - replacement with a new element.
Questions and answers (FAQ)
How often should you change the air filter on your Nissan Murano Z51?
According to the regulations, replacement must be made every 15,000 - 20,000 km. However, when operating in city conditions with high dust levels or when traveling frequently on dirt roads, it is recommended to check the filter every 10,000 km and change if necessary.
Can the old filter be cleaned and used again?
No, the paper filters installed on the Murano Z51 are disposable. Attempting to clean with water or compressed air destroys the structure of the material, making it unable to retain fine dust, which can lead to engine wear.
Which filter is better: original or analogue?
The original filter ensures a perfect fit and guaranteed quality. However, high-quality analogues from manufacturers like Mahle, Knecht or Mann-Filter often surpass the original in terms of resource and filtration efficiency at a lower price. The main thing is to buy products from official dealers.
What happens if you don't change the filter on time?
A clogged filter leads to loss of power, increased fuel consumption, unstable engine idling and increased wear of the piston group. In the long term, this can cause the air sensors and catalytic converter to fail.
Do I need to reset errors after replacing the filter?
Usually not. If the "Check Engine" error was caused by a dirty filter, it may disappear on its own after several engine cycles. If the error does not disappear, the problem may not be with the filter, or the adaptations may need to be reset via the diagnostic scanner.