Many sedan owners Nissan Sunny FB15 Over time, they encounter an unpleasant problem: the trunk release button stops working. In most cases, the culprit is the mechanical cable, which over time stretches, frays, or gets out of engagement with the lock. Trunk cable - this is a critical element of the opening system, the serviceability of which determines the ease of use of the car.
Ignoring this breakdown leads to the fact that you can only open the trunk from the inside, which is often impossible if you are on the road with a full cabin of passengers. Replacement Nissan Sunny cable - a task that even a novice car owner can handle with a minimum set of tools and free hands. However, it is important to understand the design features of the body of this particular model, so as not to damage the plastic lining during dismantling.
Design and principle of operation of the Nissan Sunny trunk lock
Trunk release system on model Nissan Sunny generation FB15 is a classic mechanical design. Pressing a button on the front panel or a handle on the outside transmits force through a flexible cable in a braided steel casing directly to the trunk lid locking mechanism.
Inside the lock there is a lever that, when the cable is pulled, moves the latch, allowing the lid to rise under the action of the gas stops. If trunk cable the braid is stretched or has defects, the force is not fully transmitted and the latch does not open. It is important to note that on Nissan Sunny The opening button is often located in an inconvenient place - under the steering wheel, which requires careful handling when replacing.
The design of the cable sheath is designed for a certain service life, but aggressive use or the ingress of moisture and dirt into the casing can sharply shorten this life. Lock mechanism is sensitive to distortions, so even a small defect in the cable can lead to jamming of the entire system.
⚠️ Attention: Do not try to open the trunk by force by pulling the button or handle if the mechanism does not work. This can lead to a break in the cable inside the cabin or breakage of the plastic button retainer on the dashboard.
Diagnosis of the malfunction and selection of the appropriate part
Before you go to the store to buy a spare part, you need to accurately determine the cause of the failure. Sometimes the problem is not in the cable itself, but in a jammed lock mechanism or a frayed contact in the button. Carry out a visual inspection: remove the plastic trim under the steering wheel and check whether the cable is tensioned when the button is pressed.
If the cable moves but the trunk does not open, the problem may be in the trunk itself. trunk lock or in its drive. If the cable does not tension at all or sag, it needs to be completely replaced. For Nissan Sunny FB15 There are both original spare parts and high-quality analogues from trusted brands.
When choosing a part, pay attention to the length of the cable and the type of fastening of the tips. It is difficult to make a mistake with the length, since the factory geometry of the body is strictly defined, but low-quality analogues may have other types of clamps, which will complicate installation.
- 🔍 Original cable article number for Nissan Sunny FB15: 80831-4CA0A (check relevance by VIN code).
- 💰 High-quality analogues are often 20-30% cheaper than the original, but have a similar resource.
- 🛠️ Before purchasing, be sure to compare the shape of the tips with your old part.
- Once a year
- Once every six months
- Only in case of breakdown
- I never serve
Preparation for replacement and necessary tools
For a successful replacement trunk cable you don't need complex diagnostic equipment or a lift. The entire process is done on the ground in a garage or even a parking lot if the weather permits. The main condition is the availability of free space for working with the plastic interior panels.
You will need a standard set of tools: a Phillips screwdriver, a flat-head screwdriver (preferably with a protective attachment for plastic), a set of 10 and 8 sockets, and a flashlight. Lighting plays a key role, since you will have to work in the dark cavities of the cabin and trunk.
Don't forget to prepare a container for small fasteners. When removing the trim, you'll be faced with a lot of plastic clips and screws that can easily get lost in the carpet or on the floor of your car. Plastic pistons often break during dismantling, so it is better to have spare ones in case of unforeseen situations.
☑️ List of required tools
Step-by-step instructions for removing the old cable
Start by removing the inner trunk trim. On Nissan Sunny FB15 trim is attached with plastic clips and several screws. Carefully pry off the panels with a flat-head screwdriver so as not to damage the decorative coating. Remove the side panels and bottom mat to access the lock mechanism.
Next you need to get to the opening button. It is located under the instrument panel, near the driver's left foot. Remove the plastic cover by unscrewing the screws and releasing the clips. Be careful as the plastic on older cars becomes brittle. Opening button has a wired part (if there is a backlight) and a mechanical cable.
Now that you have access to both ends of the cable - at the lock and at the button, you can begin to disconnect it. At the lock, the cable is attached to the lever using a plastic sleeve, which must be carefully squeezed and pulled out. The cable is secured at the button with a locking ring or a special clamp.
After disconnecting the ends, you need to remove the cable itself from the body. It passes through special rubber seals in the partition between the passenger compartment and the trunk. Push the cable from the trunk side into the passenger compartment, carefully pulling it through the hole under the button.
What to do if the cable breaks inside?
If the cable breaks and the tip remains inside the housing, it can be removed using a magnet on a wire or a special grip. Sometimes you have to partially disassemble the trunk door trim to gain access to the inside of the lock.
Installing a new cable and checking operation
Installing a new trunk cable - a process reverse to dismantling. First, pass the cable through the body holes, starting from the interior side and leading it to the trunk. Make sure that the braid does not twist or touch sharp metal edges or bolts.
Connect the end of the cable to the lock lever in the trunk. Make sure that the latch snaps into place until it clicks. This is a critical point: if the latch does not work, the cable will fly out the first time you try to open the trunk. Then secure the other end of the cable to the button under the instrument panel.
Before assembling the entire interior, be sure to check the functionality of the mechanism. Press the button several times, tracking the movement of the lock lever. Cable travel should be smooth, without jerking or jamming. Make sure the trunk opens completely and easily.
If everything works properly, proceed to reassembly. Replace the plastic panels, snap the clips into place, and tighten the screws. Don't forget to put the trunk mat and side trims back in place. Test opening the trunk several times in different modes (with the interior doors closed and open).
- ✅ Check the tension of the cable: it should not dangle, but it should not be too tight.
- 🛡️ Treat the places where the cable passes through the body with silicone lubricant to protect it from moisture.
- 🔒 Make sure the trunk lid closes tightly and securely.
| Parameter | Original (Nissan) | Analog (China/Taiwan) | Repair kit |
|---|---|---|---|
| Average cost | 3500-4500 rub. | 1500-2500 rub. | 500-800 rub. |
| Service life | 100+ thousand km | 40-60 thousand km | 10-15 thousand km |
| Braid quality | High, flexible | Medium, hard | Low |
| Difficulty of replacement | Average | Average | High |
| Warranty | 12 months | 6 months | Missing |
Correct installation of the cable while maintaining the factory geometry is the key to long service life of the mechanism without jamming.
Typical replacement errors and their consequences
One of the most common mistakes is incorrect cable installation. If the cable bends at a sharp angle or passes too close to moving parts, it will quickly fray. On Nissan Sunny special attention should be paid to the place of passage through the cabin partition.
Another mistake is using silicone grease in large quantities. Lubrication is necessary to reduce friction, but its excess can attract dust and dirt, turning into an abrasive paste that destroys the cable sheath from the inside. Cable lubrication must be applied in a thin layer.
Incorrect tension also leads to problems. Too little tension will not allow the trunk to open, and too much tension will lead to constant tension on the lock spring and rapid wear of the mechanism. The factory cable tension on the Nissan Sunny FB15 ensures easy movement of the button without dips or delays.
⚠️ Attention: Never try to replace the cable without removing the plastic trunk trim. This may result in damage to the lock mechanism or the inability to install a new cable due to lack of access to the fasteners.
Prevention and extension of the service life of the mechanism
To avoid repeated breakdowns, it is recommended to carry out regular maintenance of the lock mechanism and cable. Once every six months, clean the lock mechanism from dust and dirt using a can of compressed air or a soft brush.
Regularly check the condition of the cable for chafing of the braid, especially in the places where it bends and exits the metal sleeves. If you notice abrasions, it is better to immediately replace the cable to prevent it from breaking at the most inopportune moment.
Use only specialized lubricants for automotive cables. They have the required viscosity and do not freeze at low temperatures. Regular motor oil or WD-40 are not suitable for this purpose, as they wash out quickly and do not provide long-term gliding.
- 🧹 Clean the lock mechanism from dirt and ice during the winter period.
- 🧴 Use graphite or silicone lubricant for moving parts.
- 🚫 Avoid using harsh chemical solvents when cleaning.
Before the onset of winter, be sure to check the operation of the trunk lock and lubricate it to avoid freezing of the mechanism in severe frost.
Frequently asked questions from Nissan Sunny FB15 owners
Below are answers to the most frequently asked questions from owners. Nissan Sunny when replacing the trunk cable. This data will help you make the right decision and avoid common problems.
Is it possible to open the trunk if the cable is broken?
Yes, it's possible. In the design of the castle Nissan Sunny FB15 Emergency access is provided from inside the trunk. Remove the shelf or move the carpet, find the hatch in the back wall (usually in the center or side), open it and press the lock release manually. This will allow you to open the lid from the outside.
Do I need to change the lock when replacing the cable?
No, in most cases it is enough to replace only the cable. The lock is replaced only if its mechanism is jammed or the internal plastic levers are broken. If, when you press the button, the cable is tensioned, but the lock does not work, then the entire assembly will need to be replaced.
How long does it take to replace a cable?
If you have experience and all the necessary tools, replacement takes from 40 minutes to 1.5 hours. For a beginner, this process can take 2-3 hours due to the need to carefully dismantle and install the plastic interior panels.
What to do if the button under the steering wheel is broken?
If the plastic part of the button is broken, but the cable is intact, you can temporarily use the emergency lock or replace only the plastic body of the button. If the button mechanism is completely destroyed, the button assembly will need to be replaced, which is often sold complete with a cable.
How to check a new cable before installation?
Before installation, pull the new cable through by hand, making sure it moves smoothly along the entire length of the braid. Check that all fasteners and lugs are present. Compare the length and shape of the fastener with the original part to exclude defects or incorrect selection of the model.
Regularly checking and lubricating the trunk lock mechanism prevents jamming and extends the life of the cable by years.