Crossover operation Nissan Murano the second generation (Z51 body) in harsh climates often leads to the appearance of characteristic problems with body elements. One of these seemingly insignificant but critically important details is front bumper boot. Many owners ignore its condition until they hear an unpleasant knock when driving over bumps or see water and dirt getting into the lower part of the body.
This element, often also called a protective screen or bumper skirt, performs not only an aesthetic function, but also a purely technical one. It protects air intakes, radiators and suspension elements from direct contact with stones, reagents and debris. Missing or damaged anther on Nissan Murano Z51 can lead to engine overheating, corrosion of internal cavities and destruction of the plastic of the bumper itself from abrasive effects.
Functional purpose and design features
In the design of the front bumper Nissan Murano On the Z51 model, the boot is a flexible plastic panel fixed at the bottom of the bumper. Its main task is to create an aerodynamic screen that directs air flow under the car, cooling the units, and at the same time serves as a barrier. Without this element, the air flow becomes turbulent, which can negatively affect the efficiency of the air conditioning and engine cooling system.
The manufacturing material is special impact-resistant polypropylene, which must withstand temperature changes from -40Β°C to +80Β°C. However, over time, under the influence of ultraviolet radiation and road reagents, plastic loses its elastic properties. Fragility of the material becomes the main cause of destruction of the fastenings and the screen canvas itself. This happens especially often in areas where the part experiences constant vibration when moving.
It is worth noting that on some modifications Murano Z51 The boot has perforations or special holes for water drainage. If these holes become clogged with dirt, a βgreenhouseβ effect occurs, which accelerates corrosion of the internal metal elements of the body. Regularly checking the cleanliness of this area is a mandatory procedure during maintenance.
The main reasons for part failure
The most common cause of failure is mechanical impact. When driving through speed bumps or deep holes, the lower part of the bumper experiences significant loads. If ground clearance the car has not been adjusted or has been lowered, the risk of damage to the boot increases many times over. Impacts from stones flying from under the wheels of trucks in front also leave cracks and chips.
The second important factor is chemical exposure. Road reagents, salt and bitumen used by utilities in winter have an aggressive effect on plastic. Over time, the structure of the material is destroyed and it begins to crumble. Corrosion fasteners (clips and self-tapping screws) also leads to loss of tightness of the connection. Owners often do not notice this until the part begins to fall off completely.
Often the problem lies in a manufacturing defect or incorrect installation. If during the previous bumper replacement clips were selected incorrectly or installed skewed, the part will begin to dangle and quickly become unusable. Uneven gaps between the bumper and boot create additional stress points where the plastic breaks first.
β οΈ Attention: Ignoring cracks in the boot may allow water to enter the generator and starter compartment, which will cause a short circuit and failure of electrical equipment.
Symptoms of malfunction and diagnosis
You can determine that the boot requires replacement by a number of obvious signs. Firstly, this is the appearance of extraneous sounds when moving. A whistling, rattling or knocking noise that gets worse over bumps often indicates that a part has become detached from the bumper. Second, a visual inspection will reveal any cracks, tears, or missing sections. If you see dirt getting inside the bumper, this is a direct signal to action.
In some cases, the problem manifests itself indirectly. For example, increased wind noise at high speeds or decreased efficiency of the air conditioning system may indicate poor aerodynamics due to a damaged screen. Also pay attention to the condition of the lower edge of the bumper: if the plastic begins to crack from bottom to top, it means that the boot is no longer performing its shock-absorbing function.
For an accurate diagnosis, just park the car on a flat surface and look underneath. If you see that fastenings are torn out or the part is hanging on one screw, operation in this form is unacceptable. It is especially important to check the condition of the anther after the winter season, when the exposure to reagents was maximum.
- Plastic cracks
- Broken fastenings
- Complete absence
- Didn't notice any problems
Selection of original spare parts and high-quality analogues
When choosing anther for Nissan Murano Z51 It is important to understand the difference between the original and analogues. The original part (OEM) is made from properly formulated plastic to ensure durability and fit. The part number usually starts with a Z51 body-specific prefix and may vary depending on the year and bumper type (with or without parking sensors).
Analogues on the market are represented by a wide range of manufacturers. Some offer softer plastics, which may be easier to install but may reduce impact resistance. Others use a stiffer material that holds its shape better, but may crack at the first strong impact. When choosing an analogue, carefully study reviews about the quality of the plastic and the accuracy of the mounting holes.
The table below shows a comparison of the main characteristics of the original part and popular analogues:
| Part type | Material | Service life | Price (guideline) | Difficulty of installation |
|---|---|---|---|---|
| Original (Nissan) | Impact resistant polypropylene | 5-7 years | High | Low |
| High-quality analogue (Japan) | Polypropylene with additives | 3-5 years | Average | Average |
| Budget equivalent (China) | Hard plastic | 1-2 years | Low | High (needs improvement) |
| Refurbished | Welded plastic | Up to 1 year | Very low | High |
β οΈ Attention: When buying cheap analogues, you run the risk that the holes for the clips will not coincide with the seats on the bumper, which will require drilling new holes.
Step-by-step instructions for replacing the boot
Replacing the front bumper boot with Nissan Murano Z51 - a task that any car owner can do with a minimum set of tools. You will need a Phillips screwdriver, a set of sockets (usually 8 or 10 mm) and new clips. The process does not require removing the bumper itself, which significantly saves time and reduces the risk of damage to the paintwork.
βοΈ Preparation for replacement
The first step is to dismantle the old part. To do this, unscrew all visible screws around the perimeter and below. Then you need to carefully snap off the plastic clips located at the bottom of the wheel arches. This must be done carefully so as not to break the bumper itself. If the clips are stuck, use a flathead screwdriver to pry them open with a rag underneath.
After removing the old part, clean the seats from dirt and rust. Apply a small amount of anti-corrosion compound to the metal if necessary. Install the new clips into the boot holes, making sure they fit snugly. Place the new piece against the bumper and clamp it in place, starting from the center and working outward to ensure an even fit.
β οΈ Caution: Do not over-tighten the screws as this may cause the plastic to deform and new cracks to appear around the mounting holes.
The final stage is checking the reliability of the fastening. Try shaking the boot slightly with your hands; it must be firmly fixed and not make sounds. Go over all the attachment points again, making sure nothing is missing. If there are gaps, the clips may not be fully installed or the mounting sockets on the bumper may be damaged.
What to do if the clips on the bumper are broken?
If the seats for the clips on the bumper are destroyed, you can use metal screws with plastic washers. However, this requires care so as not to damage the paint. There are also special repair inserts-bushings that are glued into the plastic of the bumper to restore the fastening.
It is important to note that when replacing the boot, it is recommended to immediately check the condition lower air ducts and radiators. Debris often accumulates behind the boot, blocking air flow. Cleaning these areas will extend the life of your vehicle's cooling system.
Correct installation of the new boot without distortions guarantees the absence of vibrations and noise when the car is moving at any speed.
Care and damage prevention
For a new part to last a long time, it needs proper care. Wash the lower part of the bumper regularly, removing accumulated dirt and reagents. This can be done manually or using a high-pressure washer, but be careful: too powerful a jet can knock off the clips or damage the part itself if it already has microcracks.
Use special chemical compounds to restore plastic plasticity. Such products create a protective film that repels water and dirt, and also prevents color fading in the sun. Processing silicone grease or a specialized spray for plastic every six months significantly extends the life of the part.
In winter, try to avoid deep snowdrifts and ice that can get stuck under the bumper. When driving on ice or slush, reduce your speed. If ice does get under the bumper, do not try to break it off with an ice ax or stick - this is a sure way to break the plastic. It is best to warm up the engine and let the ice melt on its own.
Before each off-road trip, inspect the underside of the bumper. Small stones or branches stuck under the boot can cause it to rupture when moving.
Frequent errors during operation and replacement
Many owners Nissan Murano They make the mistake of trying to seal a cracked boot with tape or tape. This is a temporary solution that does not withstand vibrations and thermal expansion. Soon the tape comes off, and the edges of the crack become even more uneven, making it difficult to subsequently install a new element.
Another common mistake is using the wrong fasteners. An attempt to replace the original clips with self-tapping screws without washers results in tearing of the plastic around the hole. It is also unacceptable to use bolts that are too long, as they may rest against the internal elements of the suspension or radiator, causing them to be damaged when moving.
Do not ignore the recommendation to replace all clips at once. If you change the boot and leave the old clips, there is a high probability that the new parts will not hold securely. Old fasteners are often warped or worn, reducing their holding power.
Is it possible to paint the boot to match the body color?
Yes, the boot can be painted. To do this, the plastic must be thoroughly degreased, sanded with fine sandpaper and applied primer for plastic, and then enamel in several layers. However, black often looks more aesthetically pleasing and practical in this area.
Final recommendations for selection and maintenance
To summarize, the front bumper boot is an important part to ensure the durability and aesthetic appearance of your Nissan Murano Z51. Replacing it is a simple process and does not require specialized equipment, but it does require care and precision. The correct choice of spare parts and adherence to installation technology guarantee the absence of problems for a long time.
Don't skimp on the quality of materials. Cheap analogues can save money today, but will require replacement within a year, and possibly cause damage to other components of the car due to incorrect geometry. An original or a proven high-quality analogue is an investment in the reliability of your crossover.
Regular inspection and maintenance will help you avoid sudden breakdowns. Remember that integrity protective elements of the body directly affects the life of the engine and suspension. Take care of your car, and it will respond to you with trouble-free operation and comfort on any road.
How much does it cost to replace the front bumper boot of a Nissan Murano Z51 at a service center?
The cost of work in a specialized service varies from 1,500 to 3,000 rubles, depending on the region and the complexity of the fastening. The part itself costs from 2,000 rubles for an analogue to 8,000 rubles for an original. The final turnkey price can range from 4,000 to 11,000 rubles.
Do I need to remove the bumper to replace the boot?
In most cases, removing the bumper is not necessary. The boot is attached to the bottom of the bumper with screws and clips, which can be accessed from below the car or from the wheel arch. However, if the fasteners are broken internally or the part is severely deformed, removing the bumper may make the process easier.
What are the dimensions of the Murano Z51 boot?
Dimensions may vary slightly depending on the year of manufacture and the type of bumper (with or without parking sensors). The approximate width is about 110-120 cm, the height in the center is 15-20 cm. It is better to check the exact dimensions using the carβs VIN code before purchasing.
Is it possible to drive without a front bumper boot?
Technically it is possible to drive, but it is not recommended. The absence of a boot leads to dirt, stones and reagents getting on the radiators, generator and suspension elements. This accelerates corrosion, contamination of the cooling system and can cause engine overheating, especially in traffic jams or in the summer heat.
How to properly secure the clips if they donβt hold?
If the original clips do not hold due to wear of the seats, you can use repair bushings or replace them with self-tapping screws with a wide plastic washer. The main thing is not to overtighten the fasteners, so as not to break the threads or deform the plastic. As a last resort, you can use special plastic clamps for automotive plastic.