How to open the trunk on a Nissan Sunny: all working methods (including emergency ones)

Nissan Sunny — a reliable and unpretentious car, but even with it unexpected situations can arise. One of the most common problems owners have is the inability to open the trunk. The reasons can be different: from a dead battery to a mechanical breakdown of the lock. In this article we will look at all possible ways to open the trunk, including standard and emergency, with step-by-step instructions and nuances for different generations Sunny (N14, N15, N16, B14, B15).

It is important to understand that the methods differ depending on the year of manufacture and configuration. For example, in models with central locking and electric drive, the algorithm of actions will be one, but in basic versions without electronics it will be completely different. We will also pay attention typical mistakeswhich can lead to damage to the mechanism or body, and we will give advice on preventing such situations.

1. Standard methods of opening the trunk

Let's start with the most obvious and safe methods, which will work in 90% of cases if the mechanism is working properly. These methods are suitable for all generations Nissan Sunny, but may vary slightly in detail.

The simplest option is to use ignition key. Most models Sunny The trunk lock is located on the rear door and has a separate key hole. Insert the key, turn it counterclockwise (or clockwise depending on the model) and pull the trunk lid towards you. If the key does not turn, do not use excessive force: this may indicate that the mechanism is frozen or dirt has entered.

• 🔑 Ignition key: insert into the lock on the trunk lid, turn until it clicks and pull up. Suitable for all mechanical locks.
• 🚗 From the salon: press the trunk release button (if equipped) or pull the lever under the driver’s seat. In some versions, the lever is hidden under a plastic plug.
• 🔄 Central lock: press the unlock button on the key fob twice (if the trunk is connected to the central locking system). Older models may require you to hold the button for 2-3 seconds.

If the trunk does not open using either of these methods, check to see if the child protection (if your package includes one). In some versions Sunny it also blocks the back door. It is also worth making sure that the castle is not frozen - This is a common problem in winter. In this case, a defroster or warm air from a hairdryer will help.

2. What to do if the trunk cannot be opened with the key

The situation when the key turns but the lock does not work is familiar to many owners. Nissan Sunny. The reasons can be different: from wear of the mechanism to breakage of the rod inside the door. Let's consider diagnostics and solutions for every occasion.

The first thing to check is condition of the key and lock cylinder. If the key is worn or bent, it may not fit fully into the lock or may not turn the mechanism. Try using a spare key. If the problem persists, inspect the cylinder: dirt or rust often gets into it, especially after rain or washing. To clean, use WD-40 or special lubricant for locks. Spray the product into the hole, wait 5-10 minutes and try again.

• 🔧 Wear of the key or cylinder: try the spare key, clean the lock from dirt with lubricant WD-40.
• 🧊 Mechanism freezing: warm the lock with a hairdryer or use a defrost. Don't pour hot water!
• 🔗 Broken traction: If you hear a click when you turn the key, but the trunk does not open, the rod from the lock to the latch is most likely torn.
• 🔋 Problems with the electric drive: in models with electric lock, check the fuse F10 (10A) in the cabin block.

If the linkage is broken, you will not be able to open the trunk with the key. In this case you will have to disassemble the rear door trim from inside the cabin or use emergency methods (we will discuss them below). Before doing this, check whether the latch is jammed due to foreign objects. Sometimes it is enough to forcefully (but carefully!) pull the trunk lid up several times for the mechanism to work.

⚠️ Attention: if the trunk lock Nissan Sunny started to jam, don’t ignore the problem. Over time, this can lead to complete failure of the mechanism, especially in winter. Lubricate the larva regularly with silicone grease (at least 2 times a year).

3. Emergency opening of the trunk when the battery is dead

One of the most unpleasant situations is when the trunk is locked due to a dead battery, and the key does not turn or there is no mechanical connection with the lock. In this case you will have to use alternative methods, but it is important to act carefully so as not to damage the body or electrical wiring.

First step - try opening the trunk from inside. Even if the battery is dead, the mechanical lever (if your model has one) should work. B Nissan Sunny the lever is usually located:

• To the left of the driver's seat under the plastic panel (models N14-N15).
• On the floor behind the rear seatback (models B14-B15).
• In the glove compartment or on the center console (rare, but found on some trim levels).

If there is no mechanical lever or it does not work, you will have to connect an external power source. To do this:

1. Find positive terminal battery under the hood (usually covered with a red cap).
2. Connect positive wire from a donor battery or starting device.
3. Negative wire Connect to any metal part of the body (for example, to a bolt on the fender).
4. After power is applied, try opening the trunk using the key fob or a button in the cabin.

If this does not help, the last option remains - rear seat disassembly. In the majority Sunny The rear seatback folds down to provide access to the luggage compartment. To do this:

1. Lower the rear seat head restraints.
2. Look for loops or latches at the bottom of the back (usually hidden under the fabric).
3. Pull the special loop or press the button (depending on the model).
4. If the backrest does not fold, it may be blocked, in which case you will have to remove the trim.

Try a mechanical lever in the showroom

Connect an external battery (if you have access to the terminals)

Fold down the rear seat (if possible)

Use the emergency release cable (if provided)

Contact a specialist if all else fails -->

4. Mechanical opening methods (if the lock is broken)

If the trunk lock Nissan Sunny has completely failed (for example, the key inside is broken or the mechanism is jammed), you will have to use mechanical methods. It is important to act carefully here so as not to damage the body and increase the cost of future repairs.

The most gentle way is use an emergency release cable, if provided in your model. In some versions Sunny (especially in N16) There is a special loop or hole under the rear bumper where you can insert a wire or hook to pull the latch. To find it:

1. Look under the bumper - look for a small hole or plastic plug.
2. If there is a plug, carefully pry it off with a screwdriver.
3. Insert a wire or thin metal hook into the hole and try to engage the latch mechanism.

If there is no cable, you can try open the trunk through the taillights. This method is suitable for most models Sunny, but requires caution:

1. Remove the plastic trunk lining (it is secured with clips).
2. Unscrew the flashlight mounting bolts (usually 2-3 pieces).
3. Carefully unplug the power connector and remove the flashlight.
4. Through the resulting hole you can reach the trunk latch or lock rod.

As a last resort, if other methods do not work, you will have to drill a lock. This is a radical method that will damage the mechanism, but sometimes it is the only possible one. To do this:

• Take a drill with a drill bit with a diameter of 6-8 mm.
• Locate the location of the pins on the lock cylinder (usually the center of the key hole).
• Carefully drill through the cylinder, then try turning the lock with a screwdriver or pliers.

⚠️ Attention: Drilling the lock is a last resort. After such an intervention, you will need to replace the cylinder or the entire trunk lock. B Nissan Sunny an original lock costs from 1,500 to 3,000 rubles (depending on the model), plus replacement work. If the vehicle is under warranty, these repairs will not be covered.

5. Features of opening the trunk in different generations of Sunny

Trunk design Nissan Sunny varied depending on generation and market. For example, Japanese versions (B14/B15) were often equipped with more advanced security systems than European ones (N14-N16). Let's look at the key differences.

Generation	Years of manufacture	Lock type	Opening Features	Typical problems
N14	1991–1995	Mechanical	Key or lever in the cabin. No electric drive.	Wear of rods, jamming of the larva.
N15	1995–2000	Mechanical/electrical	In some versions the button is on the key fob. Lever under the driver's seat.	Problems with electric drive contacts.
B14	1994–1998	Mechanical	Lock with cylinder, lever behind the back of the rear seat.	It often jams in cold weather.
N16	2000–2006	Electric	Button on the key fob, emergency cable under the bumper.	Drive motor failure.
B15	1999–2006	Combined	Mechanical key + electric drive. Lever in the glove compartment.	Problems with the central locking control unit.

In models N16 And B15 a common problem with central locking control unit, which is located in the driver's door. If the trunk does not open with the key fob, but it works with the key, check the fuse F20 (15A) in the fuse box. Also in these generations it can work protection against accidental opening (if you press the close button on the key fob twice).

In older models (N14, B14) often wears out pull from lock to latch. It can be temporarily repaired by connecting the fragments with wire, but it is better to replace it with a new one (the article number of the original rod is 72601-4M000 for N14).

Where is the fuse box located in Nissan Sunny?

Most models Sunny The fuse box is located to the left of the steering column, under a plastic cover. On some versions (for example, B15) the additional unit may be located in the glove compartment or under the hood next to the battery. The fuse diagram is usually printed on the back of the block cover.

6. Prevention of trunk problems

To avoid situations where the trunk Nissan Sunny refuses to open, just follow a few simple rules. Most problems arise due to careless attitude to the mechanism or lack of regular maintenance.

Firstly, Lubricate the trunk lock and hinges regularly. Suitable for this:

• 🧴 Silicone grease - the best option for the lock cylinder (does not attract dust).
• 🛢️ WD-40 - a universal remedy, but requires re-treatment after 1-2 months.
• 🔧 Graphite grease - Suitable for mechanical parts of the latch.

Secondly, monitor the battery condition. A dead battery is one of the main causes of trunk lock on powered models. Check the battery voltage every 3 months (normal is 12.6–12.8 V). If the car sits idle for a long time, remove the terminals or use charger.

Thirdly, do not overload the trunk. B Sunny maximum load on the rear door - 50–70 kg (depending on model). Exceeding this value may cause the hinges or latch to become deformed. Also avoid sharp slamming of the lid - over time this will loosen the mechanism.

Finally, check the operation of the central locking at the first sign of trouble. If the trunk begins to open every once in a while or with a delay, this may indicate:

• Oxidation of contacts in the control unit.
• Worn drive motor.
• Problems with the wiring (especially at the transition point from the body to the door).

7. When to contact specialists

Despite the fact that many problems with the trunk Nissan Sunny you can decide on your own, there are situations when better contact service. This will save time and prevent additional breakdowns.

Contact a professional if:

• 🔌 Electronics problem: the central locking does not work, the key fob does not work, the fuses are on.
• 🔧 Drive motor broken: You can hear the sound of operation, but the trunk does not open.
• 🚪 Trunk lid is deformed: after an accident or careless opening.
• 🔑 The lock cylinder is jammed: The key does not turn even after lubrication.
• 🔋 Problems with the central locking control unit: The trunk opens randomly or does not respond to commands.

The cost of repairs at the service depends on the nature of the breakdown:

• Replacing the lock cylinder: 1500–3000 rub. (with work).
• Electric drive repair: 2000–4500 rub.
• Replacing the lock rod: 800–1500 rub.
• Electronics diagnostics: 1000–2500 rub.

If you decide to repair the trunk yourself, please note that Nissan Sunny some details may be incompatible between generations. For example, a castle from N14 not suitable for N16, even if outwardly they look the same. Always check the part numbers before purchasing.

⚠️ Attention: when replacing the trunk lock in models with an immobilizer (N16, B15) may be required flashing the key. If this is not done, the alarm will block the engine from starting. Check this point with the spare parts dealer or service center.

Frequently Asked Questions

Is it possible to open the trunk of a Nissan Sunny without a key?

Yes, there are several ways:

• Through the lever in the cabin (if provided).
• Fold down the rear seat (most models).
• Through the emergency cable under the bumper (if equipped).
• Dismantling the rear door trim from the inside.

If none of the methods work, you will have to contact specialists.

Why does the trunk open but not close?

The reasons may be the following:

• Wear or breakage latches (needs replacement).
• Problems with microswitch in the lock (does not fix the closure).
• Deformation loops trunk (after an accident or overload).
• Malfunction central locking control unit (on models with electric drive).

First, check to see if there is a foreign object preventing it from closing (for example, a seal or dirt on the latch).

How to open the trunk if the key inside the lock is broken?

Carefully remove the key piece:

1. Use tweezers or magnetif a piece of debris is sticking out of the lock.
2. If the key is deep, try fine diameter drill (1–2 mm) to drill out the remaining parts.
3. As a last resort you will have to disassemble the lock or drill the larva.

Once the broken piece is removed, the lock may require replacement or cleaning.

Where is the trunk fuse located in Nissan Sunny?

Most models Sunny The fuse is responsible for the electric trunk operation F10 (10A) or F20 (15A) in the fuse box. The block is usually located:

• To the left of the steering wheel under the plastic cover (N14-N16).
• In the glove compartment or under the hood (B14-B15).

Please refer to your model's instruction manual for the exact location.

How much does it cost to replace the trunk lock on a Nissan Sunny?

The cost depends on the model and type of lock:

• Mechanical lock: 1500–3000 rub. (original) or 800–1500 rub. (analog).
• Electric lock: 3500–6000 rub. (with motor).
• Replacement work: 1000–2500 rub. (depending on complexity).

Some services offer restoration of the old lock (cleaning, lubrication, replacement of rods), which is cheaper.