Problems with windshield wipers on cars Nissan Almera N16 become critical in rainy weather or winter, when visibility on the road deteriorates sharply. The most common cause of system failure is not a burnt-out motor, but a mechanical breakdown of the drive itself - the wiper trapezoid. Due to long-term use, plastic bushings wear out and metal levers become deformed, which leads to loss of tightness and moisture penetration into the mechanism.
If you hear a characteristic knocking, grinding noise or notice that the brushes move jerkily, you must immediately carry out diagnostics trapezoid wipers. Ignoring these symptoms can lead to jamming of the mechanism, which often ends in a burnt-out motor or blown fuse. Owners Nissan Almera N16 They face this problem regularly, since the design of the assembly has its own design features that affect the service life of the parts.
Reasons for failure of the windshield wiper mechanism
The main factor causing failure is corrosion and wear of the plastic bushings that connect the levers to each other. Over time, the plastic wears out, play appears, and the mechanism begins to work with distortions. This creates increased load on the wiper motor, forcing it to work in extreme conditions.
The second most important reason is the ingress of water and dirt into the mechanism body. In harsh winter conditions, reagents and salt accelerate the oxidation process of metal parts. If the seals have lost their elasticity, moisture penetrates inside, causing corrosion of the hinges and jamming of the components.
It is also worth noting the impact of improper installation of brushes or their icing. When you try to turn on the wipers on frozen blades, a peak load occurs that can break the fragile plastic elements of the trapezoid. Motor overload in such situations it happens instantly.
- 🔩 Wear of plastic bushings and hinges due to friction and vibration.
- 🌧️ Moisture and dirt getting inside the mechanism body through depressurized gaskets.
- ❄️ An attempt to operate wipers on icy glass or jammed blades.
⚠️ Attention: Do not try to turn on the wipers if they are frozen to the glass. This is guaranteed to lead to the motor burning out or the gearbox gears breaking.
Fault diagnosis and visual inspection
Before disassembling the entire assembly, it is necessary to conduct a thorough visual diagnosis to understand the extent of the problem. Remove the plastic wiper covers and loosen the arm nuts to check for play at the joints. If the arms dangle too much, the bushings are completely worn out.
Inspect the trapezoid body itself for cracks or signs of corrosion. On the model Nissan Almera N16 The plastic support to which the motor is attached often cracks. Also check the condition of the gearbox gear - if chips or worn teeth are visible on it, you will need to replace the entire assembly or find a new gear.
It is important to check the electrical part to rule out mechanical problems. If the motor hums, but the trapezoid does not move, then the problem is definitely in the mechanics. If there is silence, check the fuse and relay, but remember that jammed mechanism The fuse often blows.
- 🔍 Inspect the places where the levers are attached for play and metal deformation.
- 🔧 Check the integrity of the plastic bushings and the presence of lubricant in the nodes.
- ⚡ Make sure the electrical circuit is working properly and there is no oxidation on the contacts.
Tools and preparation for replacement
For high-quality repairs, you will need a standard set of tools that most car enthusiasts have. You will definitely need sockets for 10, 12 and 13, as well as a Phillips screwdriver for removing the fastenings of plastic elements. Don't forget WD-40, as nuts often stick due to corrosion.
If you are planning not just a replacement, but a restoration with replacement of bushings, you will need new bushings of a suitable diameter. Sometimes they have to be customized or use bushings from other cars if original parts are not available. Also stock up on high-quality lubricant for plastic and metal components.
Prepare your work area by clearing space under the windshield. Make sure you have access to the motor and trapeze. Removing the pads requires care to avoid breaking the plastic clips, which often become brittle over time.
☑️ Preparation for repairs
Step-by-step instructions for dismantling and replacement
Start the process by removing the windshield wiper arms. Pry the plug on the lever axis and unscrew the nut. Using gentle rocking motion, remove the lever from the shaft to avoid damaging the paintwork. If the lever is tight, use a special puller or carefully pry it through the fabric with a pry bar.
Next, you need to dismantle the plastic cover (frill) covering the mechanism. It is held on by several clips and bolts. Remove it carefully, as there are washer pipes underneath it that can get in the way. Disconnect the fluid hoses and set the cover aside.
Now you have access to the trapezoid. Unscrew the bolts securing the mechanism to the car body. Disconnect the electrical connector from the wiper motor. If you are only changing the trapezoid, disconnect it from the motor by unscrewing the connection bolts. If you are replacing the entire assembly, simply pull it out.
- 🔧 Remove the wiper arms by unscrewing the fastening nuts under the decorative caps.
- 🚗 Remove the plastic trim under the windshield by snapping off the clips.
- ⚡ Disconnect the electrical connector and unscrew the bolts securing the trapezoid to the body.
- 🔄 Remove the mechanism and replace it with a new or repaired one.
- Plastic bushings
- Metal levers
- Wiper motor
- Reducer gear
Features of repair and restoration of the unit
If you decide not to change the entire trapezoid, but to restore it, the main step will be replacing the bushings. Old bushings often fall out or are completely destroyed. They can be replaced with bronze or plastic bushings of the desired size, which will ensure smooth rotation and eliminate backlash.
Carefully inspect the metal arms for deformation. If they are bent, they need to be straightened, but this must be done very carefully so as not to crack the metal. Often the levers have a complex shape, and incorrect alignment will lead to a violation of the geometry of the movement of the brushes.
After assembly, be sure to lubricate all rubbing parts with special lubricant. Use a lubricant that is resistant to low temperatures and moisture, such as silicone or lithium based. This will significantly extend the life of the mechanism and prevent squeaks.
Secrets of long service life of trapeze
Regularly clean the mechanism from dirt and leaves that settle in the niche under the windshield. Dirt acts as an abrasive, accelerating bushing wear. Also check the tension of the springs on the levers - weakened springs reduce the pressing force of the brushes, which causes the motor to work with overload.
Before installing a new trapeze, check the length of the rods. Sometimes when replacing with similar parts from other models, a slight adjustment of the length is required so that the trajectory of the brushes is correct.
Specifications and spare parts compatibility
When choosing a spare part, it is important to understand the differences between original parts and analogues. Original trapezoid for Nissan Almera N16 It is distinguished by high quality plastic and precision gear manufacturing. However, the price can be quite high, which forces many owners to look for alternatives.
Analogues may differ in bushing material and lever design. Some manufacturers offer reinforced trapezoids with metal bushings instead of plastic, which increases reliability. However, it is important to make sure that the geometry of movement of the levers fully corresponds to the standard one, otherwise the wipers will not clean the glass well.
Below is a table with key specifications and compatible part numbers for your purchasing guide.
| Part type | Original number (example) | Compatibility | Note |
|---|---|---|---|
| Trapezoid assembly | 27200-00Q0A | Almera N16 (2000-2006) | Complete set with motor |
| Wiper motor | 27201-00Q0A | Almera N16 | Electric motor only |
| Trapezium (analog) | Various (China/Türkiye) | Almera N16 | Requires geometry check |
| Wiper levers | 27250-00Q0A | Almera N16 | Left and right levers |
The use of original bushings or high-quality bronze analogues is critical to prevent repeated play and noise in the operation of the mechanism.
Check after assembly and configuration
After installing a new or refurbished trapeze, a thorough inspection should be carried out. Before closing the plastic cover, turn on the wipers and make sure that they operate smoothly, without jerking or extraneous sounds. Pay attention to the position of the brushes in the lower and upper positions.
If the brushes do not stop in the right place, adjustment may be needed. There is a stopper on the motor shaft that must be set to the correct position during installation. This is done by rotating the shaft until the marks match or from memory if you memorized the position before removal.
Make sure the seal has been restored. Sprinkle a little water on the installation site to check if moisture is leaking into the interior or inside the mechanism. Correct installation of linings and seals is the key to the longevity of the repair.
⚠️ Attention: If the wipers stop in the wrong position after assembly, do not close the cover. Most likely, the position of the motor shaft relative to the trapezoid will need to be re-adjusted.
The final step is to check the operation of the washer. Make sure that the nozzles are not clogged and that the jet hits the glass in the right place. If you removed the hoses, check their connection tightness to avoid liquid leakage into the niche.
- ✅ Check for smooth operation and absence of extraneous sounds during operation.
- 🎯 Make sure the brushes stop in the designated “parking” zone.
- 💧 Check the tightness of the unit and the absence of water leaks into the interior.
Common mistakes during repairs
One of the most common mistakes is ignoring the condition of the plastic linings. If they are cracked or do not fit well, water will constantly flood the mechanism, negating all repair efforts. Always check the integrity of these elements.
Another mistake is using the wrong lubricant. Regular oil or grease can freeze in winter or leak, leaving the mechanism unprotected. Use only specialized lubricants designed to operate over a wide temperature range.
Don't try to save money on bushings by using pieces of rubber or other scrap materials. They will quickly wear out, and the backlash problem will return within a few weeks. High-quality replacement of bushings is the foundation for the reliability of the entire system.
How to Avoid Corrosion Problems
Regularly clean the niche under the windshield of debris and leaves. Accumulated leaves rot, release moisture and cause corrosion of the metal parts of the trapezoid. It is also recommended that an anti-corrosion coating be applied to exposed metal parts during each maintenance.
Questions and answers
Why do the wipers on the Nissan Almera N16 knock when working?
The knocking noise is usually caused by worn plastic bushings in the trapezoid joints or loosening of the levers. The cause may also be deformation of metal levers or lack of lubrication in friction units.
Is it possible to restore an old trapezoid without replacing it with a new one?
Yes, restoration is possible by replacing worn bushings with new ones (bronze or reinforced plastic) and straightening deformed levers. However, if the housing itself or the motor gears are cracked, replacing the unit is more appropriate.
How often do you need to change the lubricant in the wiper mechanism?
It is recommended to check the condition of the lubricant and, if necessary, update it every 2-3 years, especially if the car is operated in conditions of high humidity or frequent temperature changes.
What should I do if the wiper motor hums, but the arms do not move?
This indicates that the mechanism is mechanically jammed, or the gearbox in the motor is broken. It is necessary to remove the trapezoid and check it for jams, and also inspect the motor gear.
Do I need to remove the windshield to replace the windshield?
No, replacing the trapezoid with Nissan Almera N16 done without removing the windshield. It is enough to remove the wiper arms, the plastic trim and unscrew the fastenings of the mechanism to the body.