Nissan Murano Z51 Windshield Wiper Repair: Complete Guide

Windshield cleaning system on a crossover Nissan Murano the second generation (Z51 body) is one of those components that, during long-term operation, inevitably require the attention of the owners. Often the problem does not manifest itself in complete inoperability, but in incorrect operation: the wipers stop in the wrong position, begin to “jump” or make an unpleasant knock that can be heard even with music turned on. Owners of this car are faced with the fact that standard methods of lubrication or replacing brushes do not bring results, since the root of the problem lies deeper, in the mechanical part of the trapezoid.

Ignoring the symptoms can lead to serious consequences, including failure of drive gears or burnout of the electric motor winding due to jamming. Windshield wiper repair on Nissan Murano Z51 requires care, since access to the mechanism is limited by plastic decorative elements, which can be easily damaged during careless dismantling. In this article, we will analyze in detail how to carry out diagnostics, identify the true cause of the breakdown and restore the system’s functionality with your own hands, without resorting to the expensive services of service centers.

Diagnosis of trapezoid and motor faults

Before proceeding with disassembly, it is necessary to accurately determine the nature of the malfunction. Symptoms of failure may be different, but they clearly indicate a specific component that requires replacement or repair. If the wipers simply won't move, but you can hear the motor whirring, the problem almost certainly lies in the plastic drive gears or stuck linkage joints. If there is no sound from the motor at all, it is worth checking the fuse, relay or the electric motor itself.

It is important to understand that Nissan Murano Z51 A situation often occurs when the wipers stop in the “glasses” (lower position) or, conversely, cannot return to the parking position. This is a classic sign of wear and tear on the mechanism. parking sensor, built into the gear motor. The mechanical contact responsible for turning off the power at the desired point wears out or oxidizes over time, leading to chaotic operation.

• 🔊 Extraneous knocking or grinding noise during operation indicates play in the ball joints of the rods.
• 🚫 A complete lack of movement while the engine is running indicates a broken drive gear.
• ⏹️ The wipers do not stop in the down position - there is a problem with the motor control unit.

⚠️ Attention: Do not try to forcefully move the wipers by hand while the ignition is on! This can lead to instantaneous failure of the plastic gear inside the motor, which will make repairs much more expensive and difficult.

For an accurate diagnosis, it is necessary to remove the decorative plastic trim in the engine compartment and visually inspect the operation of the mechanism. Pay attention to how the rods behave at the extreme points. If they stick, bite or move jerkily, it means that the lubricant has run out or debris has gotten inside, causing corrosion of the hinges.

Preparing tools and dismantling elements

The repair process begins with proper preparation of the workplace and the necessary set of tools. You will need a standard set of sockets, keys, screwdrivers, as well as a specific puller for removing the wiper arms, since they sit very tightly on the slots. An attempt to pry off the lever with a hammer or pry bar may lead to deformation of the rod or damage to the paintwork of the body.

The first step is to remove the windshield wiper arms. To do this, you need to remove the plastic caps covering the fastening nuts and unscrew them. If the lever cannot be removed by hand, use a special puller that will gently move the splines apart. Next, you need to dismantle the plastic grille (trapezoid) that covers the mechanism. On Nissan Murano Z51 This is a plastic panel secured with clips and several bolts.

• 🔧 Use a soft cloth or cardboard to protect the paintwork when working with tools.
• 🔩 Unscrew the grille mounting bolts crosswise to avoid distortion of the plastic.
• ⚙️ Prepare a container for small parts (nuts, bolts, clips) so as not to lose anything.

After removing the grille you will have full access to trapezoidal wiper and electric motor. At this stage, it is important to photograph the location of all the rods and levers, since during reassembly you can make a mistake in the order of their installation, which will lead to a violation of the angle of departure of the wipers. Check the condition of the wiring going to the motor; often the connector becomes oxidized due to moisture.

Removing jamming and replacing rods

The most common problem owners face Nissan Murano Z51 - this is jamming of the rod joints. During operation, the lubricant is washed out, and dirt and moisture gets inside the hinges, causing corrosion. This leads to the fact that the motor does not have enough force to turn the mechanism, and it begins to work in emergency mode or stops altogether.

Repair in this case does not always require a complete replacement of the entire trapezoid. Often it is enough to disassemble each hinge, thoroughly clean it of old grease and corrosion, and then generously lubricate it with a specialized compound. If the hinge has obvious mechanical damage or play that cannot be eliminated by cleaning, it is necessary to replace a specific rod or the entire trapezoid assembly.

When replacing rods, pay attention to the presence of play in the places where they are attached to the levers. If the splines are worn out, the new link will not transmit force. Replacing rods must be carried out with care so as not to damage the plastic clips holding them in the trapezoid body. Sometimes it is easier to replace the entire assembly, since the cost of individual rods can be comparable to a used trapeze.

Why does the lubricant wash out?

In the design of the Nissan Murano Z51, the hinges do not have perfect tightness. When washing the engine compartment or during heavy rainfall, water penetrates inside, washing away the factory lubricant and causing oxidation of the metal.

⚠️ Attention: When assembling the mechanism, make sure that all levers are installed in the correct grooves. Improper installation can cause the wipers to hit the edge of the windshield or hood when operating.

After removing the jam and lubricating all moving parts, check the movement of the mechanism manually. It should be smooth, without jamming or sudden jerks. Only after making sure of this can you begin to install the electric motor and check its operation.

Electric motor repair and replacement

If the problem is not in the mechanical part, but in the electric motor itself, then the repair may be more difficult. On Nissan Murano Z51 often breaks down the control unit built into the motor housing, or the plastic gears of the gearbox are worn out. Replacing the motor A windshield wiper is the most reliable way to solve the problem, since disassembling and reassembling the motor itself requires high qualifications and the availability of special tools.

When replacing an electric motor, it is important to pay attention to the condition of the drive gear. If it is plastic and has chipped or worn teeth, be sure to replace it, even if you are replacing the motor. An old worn gear can quickly damage a new unit. Also check the connector contacts: oxidation of the contacts can lead to unstable operation or lack of power.

• ⚡ Use a multimeter to check the voltage at the connector before removing the motor.
• 🔩 Carefully unscrew the motor mounting bolts so as not to damage the trapezoid body.
• 🔗 When installing a new motor, lubricate the gear with lithol or special lubricant for gearboxes.

In some cases, simply cleaning the contacts and lubricating the gears helps, but if the wear on the brushes or commutator is significant, repairs are not practical. A new or remanufactured motor will ensure smooth, quiet operation of your glass cleaning system.

Symptom	Probable Cause	Recommended Action
The wipers don't move, the engine hums	Drive gear broken	Replacing gear or motor
The wipers squeak and move jerkily	Jamming of rod joints	Cleaning and lubricating or replacing rods
Wipers don't park	Parking sensor malfunction	Repair or replacement of motor assembly
The wipers are slow	Insufficient tension or wear	Checking the wiring and replacing the motor

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Before installing a new motor, check its operation by applying power directly from the battery (for a short time) to ensure that it is working properly.

Setting the parking position

One of the critical features Nissan Murano Z51 is the need to fine-tune the parking position of the wipers after any intervention in the mechanism. If you simply put the wipers in place, they may stop above or below the desired point, blocking your view or brushing the hood. Parking position is set mechanically when the motor power is turned off.

To configure, you need to turn on the wipers and wait for them to stop. If they do not stop in the down position, you need to remove the arms and manually rotate the motor shaft to the correct position, and then install the arms so that they rest on the glass at the desired angle. This requires patience and several attempts, as an error of 1-2 degrees can be noticeable to the driver.

It is also worth checking the operation of the “interval cleaning” mode. If the wipers operate jerkily or the delays between movements are too long, the problem may be in the relay or control unit located in the passenger compartment. In some cases, flashing the unit helps, but most often the problem is solved by replacing the relay.

⚠️ Attention: Never turn on the windshield wiper motor if the arms are not installed on the shaft! This will lead to rapid destruction of the gears and jamming of the mechanism.

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Correctly setting the parking position is the key to not only an aesthetic appearance, but also safety, since the wipers should not block the driver’s field of vision.

Common mistakes when doing DIY repairs

Many car owners, trying to save money, make mistakes that lead to repeated repairs. The most common mistake is using unsuitable lubricants. Trapezium lubricant must be heat-resistant and not washed out with water. Regular motor oil or lithol can thicken in the cold or leak, which will aggravate the situation.

Another mistake is trying to repair plastic gears with glue or epoxy. The plastic in the gearbox works under load and heat, and such “welds” do not withstand testing, leading to repeated failure of the gear. The only correct solution is to replace the gear with a new one, preferably made from reinforced material.

Also, do not ignore the condition of the brushes. Even a perfectly adjusted mechanism will not work efficiently if the brushes are worn out or dirty. Regular replacement of brushes (once a year) reduces the load on the motor and extends the life of the entire system.

Be extremely careful when working with plastic clips. On Nissan Murano Z51 they often break when dismantled, and replacing them can be time-consuming and expensive. Use special clip removers or carefully pry them off with a thin screwdriver and place a rag under it.

Conclusion and final recommendations

Windshield wiper repair Nissan Murano Z51 - a task that can be done by any car owner who has basic skills in working with tools. The main thing is to take your time, carefully diagnose the problem and use high-quality consumables. Regular maintenance of the trapezoid and timely replacement of brushes will help avoid serious damage and costly repairs.

If you are faced with a complexity that goes beyond simple manipulations, for example, electrical failures in the control unit, it is better to contact a specialist. However, in most cases the problem can be resolved by cleaning, lubricating or replacing the mechanical components. The key to success is timely diagnosis and use of the correct lubricants that are compatible with plastic and rubber.

Remember that a properly functioning glass cleaning system is not just a convenience, but a critical safety element, especially in winter or when it rains. Don't put off repairs until later, as a small problem can quickly develop into a serious problem.

Why do the wipers on the Nissan Murano Z51 often jam?

The main reason for jamming is the washing out of the factory lubricant from the trapezoid joints and the entry of moisture, which leads to corrosion and jamming. The plastic bushings may also be worn out.

Is it possible to lubricate a trapezoid with ordinary lithol?

It is not recommended to use regular lithol, as it can thicken in the cold. It is better to use special silicone lubricants or lubricants for plastic components that are not washed out with water.

How to check the serviceability of the windshield wiper motor?

The motor can be checked by powering it directly from the battery (12V). If it works, then the problem is in the wiring or control unit. If not, the motor is faulty.

How much does it cost to repair a trapezoid at a service?

The cost of repairs varies from 3,000 to 10,000 rubles, depending on the need to replace parts and the cost of work. Replacing the trapezoid assembly may cost more.

Do I need to change brushes after repairing a trapezoid?

It is desirable, since worn brushes create additional stress on the mechanism. In addition, after repairing the trapezoid, the old brush may not adhere correctly to the glass.