trunk Nissan Primera P12 (2002–2007) sometimes turns into a real puzzle for owners. Either the button on the key does not work, or the lock is jammed after washing, or the electric drive refuses to work for no apparent reason. If you find yourself in this situation, don't panic. In this article we will look at all possible ways to open the trunk, including mechanical and electrical methods, as well as emergency solutions for emergency situations.

Feature Primera P12 The problem is that the trunk opening system here is combined: it also depends on central lock, and from mechanical drive, and even on the condition of the battery. For example, if the battery is dead, the electric drive will not work, but a mechanical key can save the situation. And if the lock is jammed, you will have to use hidden levers or dismantle the casing. We will tell you how to act in each case so as not to damage the car and not spend extra money on service.

1. Standard methods of opening the trunk

Let's start with the basic methods, which should work 90% of the time. If the trunk does not open, check them all in order before moving on to drastic measures.

Method 1: Button on the key. On the original key Nissan Primera P12 there is a separate trunk opening button (usually indicated by a trunk icon). Press it once - if the central locking is working, the trunk will open. If there is no reaction:

  • 🔋 Check the battery charge in the key (it may run out even if the alarm goes off).
  • 🚗 Make sure the car is unlocked (sometimes the trunk does not open if the car is in security mode).
  • 🔌 Try pressing the button closer to the trunk - perhaps the key fob signal is weak.

Method 2: Button in the cabin. There is a trunk release button near the driver's seat (usually on the left dashboard or center console). It only works when the ignition is on. If the button does not respond:

  • 🔑 Check if the ignition is on (turn the key to ACC).
  • 💡 Inspect the fuse F30 (10A) in the fuse box - it is responsible for the electric trunk drive.

Method 3: Mechanical key. In the trunk lock Primera P12 There is a hole for a mechanical key (hidden under a plastic plug). To open it:

  1. Pry up the plug with a flathead screwdriver or your fingernail.
  2. Insert the key and turn counterclockwise.
  3. If the key does not turn, do not apply force, otherwise you will break the cylinder.
📊 Which method of opening the trunk do you use more often?
  • Button on the key
  • Button in the cabin
  • Mechanical key
  • I open it manually from inside
  • Other

2. What to do if the trunk does not open with buttons

If standard methods do not work, the problem may lie in electrical, mechanics or central lock. Let's figure out how to diagnose and fix the problem.

Problem 1: Electric drive does not work. If the buttons do not respond, but the mechanical key opens the trunk, the electric motor or wiring is at fault. Check:

  • 🔌 Fuse F30 (10A) in the cabin (fuse box under the steering wheel).
  • 🔋 Battery voltage (if less 11.5V, the drive will not operate).
  • 🔧 The condition of the wiring under the trunk trim (wires often fray).

Problem 2: The lock is jammed. If neither the key nor the buttons work, it is possible that dirt has gotten into the cylinder or condensation has frozen. Try:

  • 💨 Blow out the lock with compressed air (a can for cleaning electronics).
  • 🛢️ Pour into the well WD-40 or silicone grease, wait 10 minutes.
  • 🔨 Gently tap the lock with the wooden handle of a screwdriver (sometimes it helps to move the jammed mechanism).
💡

If the trunk opens after lubrication, but then jams again, the problem is a worn cylinder. It's better to replace it before the key breaks.

Problem 3: Central locking failure. If all buttons (including door buttons) do not work, the central locking control unit or its relay is at fault. Workaround:

  • 🔄 Reboot the system by removing the battery terminal for 5 minutes.
  • 🔧 Check the relay K15 in the fuse box (sometimes it gets stuck).

Fuse F30 (10A) checked|Mechanical key tested|Lock cylinder inspected for contamination|Wiring to electric drive checked|Battery voltage checked-->

3. Emergency opening of the trunk from the passenger compartment

If the trunk is locked and you need access to it urgently (for example, to get a battery or tools), you can open it from inside the cabin. For this you will need:

  • 🔧 Flat screwdriver or plastic pick.
  • 🔦 Flashlight (the trunk trim is dark, it’s difficult to see the mechanism).

Instructions:

  1. Fold the rear seat (to Primera P12 it reclines by pulling a lever under the backrest).
  2. Look under the trunk trim emergency opening rope - it is usually bright orange or red, attached to a lock.
  3. Pull the cable down or to the side (depending on the modification). If the cable is not visible, remove the plastic panel covering the lock.

If there is no cable (on some versions P12 it was removed), you will have to dismantle the casing:

  1. Unscrew the two plastic clips on the sides of the trunk.
  2. Carefully pry up the casing near the lock and feel for the locking mechanism with your hand.
  3. Press the lock lever manually (it should click).
What to do if the emergency opening cable breaks?

If the cable breaks or falls off the fastening, it can be temporarily replaced with wire or rope. The main thing is to hook the lock lever and pull in the same direction as the original cable. After emergency opening, it is recommended to install a new cable (part number for Primera P12 — 73201-4M000).

4. Opening the trunk when the battery is dead

If the battery is discharged, the electric trunk opening will not work, and the central locking may block mechanical opening. In this case, proceed like this:

Option 1: Recharge the battery. If you have access to the cigarette lighter or terminals under the hood:

  • 🔋 Connect a starter or “light it” from another car.
  • 🔑 After tension appears, try opening the trunk with a button in the cabin.

Option 2: Mechanical key + lock unlock. If the battery is completely dead:

  1. Open the driver's door with the mechanical key (if the central locking is locked, turn the key twice).
  2. You will get to the trunk through the interior (see the section on emergency opening).
  3. If the trunk lock is locked, insert the key into the cylinder and at the same time pull the cable from the passenger compartment.
💡

If the battery is dead and the trunk does not open, do not try to break the lock. First try to charge the battery to at least 12V to unlock the central locking.

5. Replacing the trunk lock: when and how to do it

If all methods have been tried, but the trunk still does not open, it is most likely out of order. castle or electric drive. Here are the signs that it's time to change it:

  • 🔑 The key does not turn or turns with difficulty (the cylinder is worn out).
  • ⚡ The buttons do not work, but the fuses are intact (the electric motor burned out).
  • 🔊 When you press the button, you hear a click, but the trunk does not open (broken traction).

How to replace the lock:

  1. Remove the trunk trim (see section on emergency opening).
  2. Disconnect the wiring connectors from the electric drive.
  3. Unscrew the 3 bolts securing the lock (you need Torx T20).
  4. Install a new lock (part number for Primera P12 — 73200-4M000 or 73200-4M001 depending on the year).
Malfunction Reason Solution Repair cost (RUB)
Buttons don't work Fuse F30 burned out Replacing the fuse 50–200
The key won't turn Contamination or wear of the cylinder Cleaning with WD-40 or replacing the cylinder 300–1500
There is a click, but the trunk does not open Broken traction or electric motor Replacing the drive (art. 73200-4M000) 2500–4000
Central locking does not respond Control unit malfunction Diagnostics + block replacement 3000–8000

Important: When replacing the trunk lock with Nissan Primera P12 be sure to reconfigure the keys! The new lock comes with different “secrets”, and the old keys will not work. To do this, you need to recode the immobilizer (done at the service center or using the ELM327 adapter).

6. Prevention of trunk problems

To avoid a locked trunk, follow these simple rules:

  • 🧴 Once every six months, lubricate the lock cylinder with silicone grease (do not use oils - they collect dust!).
  • 🔋 Monitor your battery charge (especially in winter).
  • 🚿 After washing, dry the lock with compressed air.
  • 🔧 Once a year, check the fastening of the emergency opening cable.

If your Primera P12 often stands on the street, install trunk lock cover (protects from moisture and dirt). It is also useful to have in the car:

  • 🔧 Spare fuse F30 (10A).
  • 🛠️ Set of plastic picks (for emergency opening without damage).
  • 🔋 Portable jump starter (if the battery is often discharged).
💡

If the trunk begins to open with a delay (for example, only after the second press of the button), this is the first sign of wear on the electric drive. Don't wait for a breakdown - replace the drive in advance before it jams completely.

FAQ: Frequently asked questions about the trunk of the Nissan Primera P12

❓ Why does the trunk only open from the interior, but not from the key?

Most likely the problem is keychain or signal receiver. Check:

  • The battery in the key (even if the alarm works, the trunk button may not work).
  • fuse F20 (7.5A) — he is responsible for the central locking signal receiver.
  • The central locking antenna (it is located in the rear of the cabin, sometimes the contact comes off).

If all else fails, the key fob’s firmware may be faulty. In this case, you need to reprogram the keys (instructions are in the car manual).

❓ Is it possible to open the trunk if the key in the lock is broken?

Yes, but carefully. Do not try to pull out the key fragment with pliers - this will damage the cylinder. Better:

  1. Lubricate the lock WD-40 and gently swing the fragment, trying to pull it out.
  2. If it doesn’t help, remove the trunk trim and pull the emergency release cable.
  3. After removing the fragment, replace the cylinder (part number - 73101-4M000).

⚠️ Attention: If a piece of the key remains inside, do not try to open the trunk by force - this will lead to breakdown of the mechanism and expensive repairs.

❓ How to open the trunk if the lock is jammed after an accident?

After an impact to the rear of the body, the lock mechanism is often deformed. In this case:

  • Try opening the trunk from inside the car by pulling the cable.
  • If the cable breaks, remove the casing and manually press the lock lever.
  • If the body is deformed and prevents opening, you will have to cut off the trunk hinges (do this only as a last resort!).

After an emergency opening, the lock will have to be replaced - even if it works, the reliability will be compromised.

❓ Why does the trunk open on its own while driving?

This is a dangerous malfunction! Reasons:

  • 🔌 Short circuit in the wiring (check the harness under the trunk trim).
  • 🔧 The microswitch in the lock is worn out (it falsely triggers due to vibration).
  • 🖥️ Central locking control unit failure.

⚠️ Attention: You cannot drive with such a malfunction - the trunk can open at speed and damage the car or create an emergency situation. Turn off the fuse F30 and contact service.

❓ Where is the trunk fuse located on Primera P12?

Trunk electric fuse - F30 (10A). It is located in salon, in the fuse box under the steering wheel (to the left of the pedals). To get there:

  1. Open the unit cover (it snaps into place with two latches).
  2. Find the fuse marked F30 (there is a diagram on the cover).
  3. Remove it with tweezers and check for integrity.

If the fuse is blown, replace it with a new one same denomination (10A). Do not install a “bug” or a fuse of a higher rating - this may burn the wiring!