Owners Nissan Murano (especially models Z50/Z51/Z52) are often faced with a situation where the trunk suddenly stops opening either from the button on the key, or from the interior key, or even manually. The problem may appear after washing, in cold weather, after replacing the battery, or for no apparent reason. In 80% of cases they are to blame electrical circuits or mechanical interlocks, but sometimes it’s a matter of system software glitches Intelligent Key.

This article will help you figure out why the trunk Murano does not respond to commands, how to check the lock and actuator, and what to do if the door is stuck in the closed position. We will consider weak points unique to this model - for example, corrosion of contacts in the rear door or operating features of the unit BCM (Body Control Module) at low voltage. You will also find instructions for emergency opening of the trunk without damaging the body.

1. Main causes of malfunction

Trouble opening the trunk Nissan Murano rarely occurs due to a single failure - usually it is a combination of factors. Listed below most common reasons, ranked by frequency of calls to the service:

  • 🔋 Low or faulty battery - at voltage below 11.5 V block BCM turns off power to the trunk actuator.
  • 🔌 Oxidation of contacts in the rear door — moisture penetrates through the seals and destroys the connectors of the wiring harness.
  • 🔒 Jammed lock or actuator - mechanical parts wear out due to lack of lubrication or corrosion.
  • 📱 Unit firmware failure Intelligent Key — after replacing the battery or updating the software, the system may “forget” the key binding.
  • 🚗 Wiring damage — frayed wires in the corrugation between the body and the trunk door.
  • ⚡ Bad fuse - in the block F37 (10 A) or F40 (15 A) for models up to 2015.

Particularly vulnerable Murano 2008–2014 — they have poor sealing of the rear door connectors, which leads to corrosion of the contacts after 5–7 years of operation. In newer models (2015+) the problem is most often associated with software glitches in the keyless entry system.

📊 How long have you had a problem with your trunk?
  • Less than a week
  • 1–3 months
  • More than 6 months
  • The problem occurs periodically

2. Diagnostics: where to start?

Before disassembling the tailgate, perform basic checkwhich will take no more than 10 minutes:

  1. Check the battery — measure the voltage at the terminals with the ignition off. Norm: 12.4–12.7 V. If below 12 V, recharge or replace the battery.
  2. Test the key — try opening the trunk using a different key fob. If the second key works, the problem is synchronization Intelligent Key.
  3. Press the box - if the trunk does not respond, check the fuses F37 And F40 in the mounting block (located under the steering wheel on the left).
  4. Listen to the sounds — when you press open, you should hear a click from the actuator. Its absence indicates problems with power supply or mechanics.

If the trunk sometimes opens (for example, after several presses), most likely the oxidized contacts in the door connector are to blame. To check, pull the wiring harness in the trunk - if the trunk opens, the problem is a break or poor contact.

Checking battery voltage (12.4–12.7 V)|Testing the second Intelligent Key|Checking fuses F37 and F40|Listening for the actuator to click when the button is pressed|Visually inspecting the wiring harness in the trunk-->

3. Electrical problems: fuses, wires, connectors

Electrical circuit for opening the trunk on Murano includes 4 key elements:

  1. Fuses — F37 (10 A) is responsible for powering the actuator, F40 (15 A) - for control circuits.
  2. Relay — in the block under the hood (relay K5 for models up to 2015).
  3. Wiring harness — passes through the corrugation between the body and the trunk door.
  4. Connector on the actuator - often oxidizes due to moisture.

To check the circuit, follow these steps:

  1. Remove the trunk trim (unscrew the 4 plastic clips and 2 bolts under the shelf).
  2. Find the actuator connector (white or gray, 2-3 wires). Disconnect it and check the voltage at the contacts when you press the open button (there should be 12 V).
  3. If there is no voltage, check the integrity of the wires from the mounting block to the trunk (use a multimeter in the “test” mode).

Typical faults:

  • 🔥Blown fuse F37 — replace with a similar one (10 A).
  • 🔌 Oxidation of contacts in the actuator connector - clean with alcohol or a special liquid Contact Cleaner.
  • 🔗 Wire break in the corrugation - the black wire often frays (mass) or red (+12 V).
How to test the trunk relay?

Relay K5 located in the mounting block under the hood (next to the battery). To check its functionality:

1. Remove the relay and inspect the contacts for oxidation.

2. Serve 12 V to contacts 85 (mass) and 86 (plus) - a click should be heard.

3. If the relay does not work, replace it with a new one (part number for Murano Z51: 25230-4M00A).

4. Mechanical failures: lock and actuator

If the electrical part is working properly, but the trunk does not open, the problem lies in mechanics. On Nissan Murano Two types of actuators are installed:

  • 🔧 Electromechanical (models before 2014) - consists of a motor and gearbox.
  • 🔧 Electromagnetic (models 2015+) - works on the principle of a solenoid.

Signs of actuator malfunction:

  • 🔊 A click is heard, but the door does not open (gear gears are worn out).
  • 🔊 The actuator buzzes, but does not work (the motor shaft is jammed).
  • 🔊 Complete absence of sounds (winding break or jammed anchor).

To replace the actuator:

  1. Remove the trunk trim (as described above).
  2. Disconnect the power connector from the actuator.
  3. Unscrew the 3 mounting bolts (using a Phillips screwdriver).
  4. Install a new actuator (items: 80910-4M000 for Z50/Z51, 80910-4M100 for Z52).

If the trunk is stuck in the closed position, try emergency opening:

  1. Bend back the trim at the bottom of the door (interior side).
  2. Locate the emergency release cable (orange or red).
  3. Pull the cable down - this will unlock the lock.
💡

If the emergency opening cable is broken, you can try opening the trunk through the rear seats. To do this, fold the back of the rear sofa (if this is possible in your configuration) and try to reach the lock with your hand or a screwdriver.

5. Software failures: Intelligent Key and BCM reset

Keyless Entry System Intelligent Key on Murano Sometimes it “forgets” the binding of the keys or blocks commands to open the trunk. It shows up like this:

  • 🔑 The key opens the doors, but not the trunk.
  • 🔑 After replacing the battery, the trunk stopped opening.
  • 🔑 The indicator lights up on the dashboard KEY (yellow key).

To reset the system, follow these steps:

  1. Close all doors and trunk.
  2. Insert the key into the ignition and turn to position ON (do not start the engine).
  3. Press the trunk release button on the key 6 times in a row (at 1 second intervals).
  4. Turn off the ignition and remove the key.
  5. Wait 10 seconds and try to open the trunk.

If resetting does not help, you will need flashing the block BCM. To do this:

  1. Connect a diagnostic scanner (for example, Launch X431 or Autel).
  2. Select menu Nissan → Murano → BCM → Relearn.
  3. Follow the onscreen instructions to bind your keys.

Important: after flashing BCM Windows, mirrors and other functions may need to be adjusted through the menu Personal Settings in the on-board computer.

6. Prevention: how to avoid problems in the future

To the trunk Nissan Murano opened without problems, follow these recommendations:

  • 🔧 Lubricate the lock and actuator - use silicone lubricant (for example, WD-40 Specialist) 2 times a year.
  • 🔌 Check your contacts — once a year, clean the connectors in the trunk from oxidation (especially after winter).
  • 🔋 Keep an eye on your battery - the voltage should not drop below 12 V, otherwise BCM will turn off the power to the actuator.
  • 🚗 Avoid overloading the door — do not hang heavy bags on the trunk lid, this will deform the lock mechanism.

For models 2015+ Additionally recommended:

  • 📱 Update firmware BCM And Intelligent Key in the official service (every 2-3 years).
  • 🔑 Keep the spare key away from electronic devices (to avoid synchronization failures).

If you often transport large cargo, install protective film on the trunk seal - this will prevent moisture from getting into the connectors.

💡

Regular maintenance (lubrication, cleaning contacts) reduces the risk of breakdown by 70%. Most trunk problems Murano arise due to neglect of electrical and mechanical care.

Repair cost comparison

Fault type Cost of spare parts (₽) Cost of work (₽) Difficulty (1–5)
Replacing the trunk actuator 3 500–6 000 1 500–2 500 3
Wiring repair (corrugation) 500–1 200 2 000–3 500 4
Cleaning/replacing connectors 300–800 1 000–1 800 2
Flashing BCM — 2 500–4 000 5
Replacing the trunk lock 4 000–7 500 2 000–3 000 3

Prices are indicated for Moscow and the Moscow region for 2026. In regions, the cost may differ by 20–30%. Self-repair (for example, replacing an actuator or cleaning contacts) will only cost the price of spare parts.

FAQ: Frequently asked questions

The trunk does not open either with the key or with a button in the cabin. Where to start?

Check first battery - if the voltage is lower 11.8 V, BCM blocks power to the actuator. Then test fuses F37 and F40 and inspect wiring harness in the trunk for breaks.

Is it possible to open the trunk if the battery is dead?

Yes, there are two ways:

  1. Through the salon — fold down the back seat (if this is possible in your configuration) and try to reach the lock.
  2. Emergency rope — remove the trim at the bottom of the trunk door (from the passenger compartment) and pull the orange cable.

If the cable is broken, you will have to light the car or use a jump charger.

After replacing the battery the trunk stopped opening. What to do?

This is a typical synchronization failure Intelligent Key. Execute key retraining procedure:

  1. Close all doors.
  2. Insert the key into the ignition and turn to position ON.
  3. Press the trunk release button on the key 6 times in a row (at 1 second intervals).
  4. Turn off the ignition and remove the key.

If this does not help, contact the service for flashing BCM.

How to check if the trunk actuator is working?

Disconnect the actuator connector and apply 12 V directly from the battery (plus to the red wire, minus to the black). If the actuator:

  • 🔊 Clicks and moves - it is working properly, the problem is in the wiring or control unit.
  • 🔊 Buzzes but doesn't work — the gearbox is worn out and needs replacement.
  • 🔊 Silent - broken winding or jammed armature.
Is it possible to drive if the trunk does not open?

Yes, but with reservations:

  • ✅ Safe, if the problem is only in the actuator or electrics.
  • ⚠️ Dangerous, if the trunk is jammed due to a deformed lock, in the event of an accident the door may not open even from the outside.
  • 🚨 Prohibited, if dangerous goods are transported in the trunk (for example, gas cylinders) - according to Traffic Regulations 23.5, they must be easily accessible for inspection.

We recommend that the problem be resolved within 1–2 weeks.