The situation when Nissan Murano does not see the ignition key, is familiar to many crossover owners, especially models 2015–2023. The problem manifests itself in different ways: the car does not respond to pressing the start button, a warning light appears on the dashboard Key Not Detected, or the car suddenly stalls while driving. In 80% of cases, it is not mechanical failures that are to blame, but malfunctions immobilizer, key fob battery discharge or system software errors Nissan Intelligent Key.

In this article we will look at all possible causes of malfunction - from a banal dead battery to serious problems with the immobilizer antenna or control unit. You will learn how to diagnose the problem yourself, what measures to take first, and when a visit to the service is indispensable. We will pay special attention to models with keyless entry (Push-Start), since they are the most vulnerable to such failures.

Why Nissan Murano does not see the key: main reasons

Key recognition system in Murano works via radio frequency identification (RFID). When you bring the key fob to the start button or are near the car, the immobilizer antenna reads the signal and allows the engine to start. If the chain is interrupted, the machine “does not see” the key. Here top 7 reasons problems:

  • 🔋 The battery in the key fob is dead - the most common reason (especially if the key has not been used for a long time).
  • 📡 Interference from other electronic devices — smartphones, wireless chargers, or even keys from other cars can block the signal.
  • 🚗 Immobilizer antenna malfunction - often fails after 100–150 thousand kilometers.
  • 🔧 Control unit firmware failure — relevant for 2018–2020 models after software updates.
  • 🔑 Damage to the chip in the key — physical shocks or moisture can damage it.
  • 🔌 Problems with power supply to the immobilizer unit — oxidation of contacts or blown fuse.
  • 🛠️ Incorrect key flashing — if the key fob has been duplicated or repaired previously.

It's interesting that in Murano 2021–2023 the problem is often related to a system software update NissanConnect. After some updates, owners complain about spontaneous key recognition failures, which can only be resolved by resetting the settings or reflashing them at the dealership.

⚠️ Attention: If the car doesn't see both keys at the same time - the problem is almost certainly in the immobilizer antenna or control unit. In this case, self-repair may result in the system being blocked!

How to check if the key fob is at fault

Before going to the service center, make sure that the problem is in the key. Here 3 diagnostic methods:

  1. Checking the indicator on the key fob. Press any button (open/close doors) - if the light does not blink, the battery is low.
  2. Test with a different key. If the second key fob works, the problem is in the first one. If both are not recognized, the machine is at fault.
  3. Checking the proximity of the key. Bring the key fob close to the start button (sometimes it helps even with a low battery).

If the key fob does not respond to presses, try replace the battery. B Nissan Murano elements are used CR2032 (for keys before 2020) or CR2026 (for new models). After replacement it may be necessary resynchronization — to do this, press the door lock button 5 times in a row.

📊 How often do you encounter key problems in Nissan Murano?
  • Never
  • 1–2 times a year
  • More than 3 times a year
  • Constantly

What to do if Nissan Murano does not see the key: step-by-step instructions

If the diagnostics showed that the problem is not in the key fob, follow this algorithm:

1. Reboot the system (remove the key, close all doors, wait 5 minutes)

2. Check the immobilizer fuse (F34 or F35 in the block under the hood)

3. Try starting the car with the second key

4. Turn off all electronic devices in the cabin (phones, tablets)

5. Check the battery voltage (must be at least 12.4 V)-->

If simple measures do not help, you will have to dig deeper. On models Murano 2015–2017 common problem - oxidation of immobilizer antenna contacts, which is located around the ignition switch. To get to it, you need:

  1. Remove the plastic cover around the start button (carefully pry it off with a screwdriver).
  2. Disconnect the antenna connector (usually black or gray).
  3. Clean contacts with alcohol or special liquid Contact Cleaner.
  4. Check the integrity of the wires - they often rub against the plastic.

On Murano 2018+ The antenna is integrated into the control unit, so you will need a scanner to check it Nissan Consult or similar. Without diagnostic equipment, it is almost impossible to identify a malfunction.

⚠️ Attention: Do not try to “deceive” the immobilizer by disconnecting the battery or resetting the terminals! On Murano this could lead to complete system blocking and the need to flash all keys in the service.

Firmware update and factory reset

If the problem appeared after the update NissanConnect or replacing the battery, resetting the system will help. To do this:

  1. Insert the key into the lock (even if the car does not see it).
  2. Rotate to position ON (do not start the engine).
  3. Press and hold the button Trip Reset (on the dashboard) 10 seconds.
  4. Wait for the signal and the system reboots.

For models 2020 and newer A firmware update may be required via Nissan Intelligent Key System. Official dealers do this using CONSULT-III Plus, but some owners successfully flash through OBD-II adapter and program Nissan DataScan. However Self-updating is fraught with errors - if the process is interrupted, the machine may become completely blocked.

What happens if you interrupt the firmware?

If you turn off the power or remove the key while updating the immobilizer software, the system Nissan NATS (Nissan Anti-Theft System) will go into emergency mode. In this case, even the original key will not be able to start the engine - a complete flashing of the control unit will be required at the service center (cost from 15,000 rubles).

Model Murano Typical problem Solution Repair cost (RUB)
2015–2017 Immobilizer antenna oxidation Cleaning contacts or replacing antenna 1 500–4 000
2018–2019 Firmware crash after update Resetting or flashing 5 000–12 000
2020–2021 Interference from wireless devices Key shielding or block replacement 3 000–8 000
2022–2023 Chip in the key is faulty Replacing or reprogramming the key fob 8 000–20 000

When you can't do without a service

There are situations when DIY repair is impossible or dangerous:

  • 🔧 The car does not recognize both keys - this is almost always a problem with the control unit.
  • 🚨 Lights up on the dash Security or Immobilizer — the system is in emergency mode.
  • 🔌 After replacing the battery, the keys stopped working - Retraining required.
  • 📱 Crash after flashing via NissanConnect - need to roll back to the previous version.

Dealership centers use a scanner for diagnostics. CONSULT, which reads immobilizer errors (for example, U1000 - loss of connection with the unit, B210E - antenna malfunction). Average diagnostic cost - 2,000–3,500 rubles. If the problem is in the control unit, replacing it will cost 40,000–70,000 rubles (depending on model).

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Before visiting the service center, take a photo of the vehicle's VIN and key number (located on the metal tag of the key fob). This will speed up the diagnostic process and help avoid errors when flashing.

Preventing key problems in Nissan Murano

To avoid problems in the future, follow these guidelines:

  • 🔋 Change the battery in your key fob every 2 years (even if it works).
  • 📵 Do not store the key near electronics (phones, microwaves, routers).
  • 🚗 Check your battery voltage regularly — drawdowns below 12 V cause immobilizer failures.
  • 🔑 Do not drop or wet the keychain — the chip is sensitive to shock and moisture.
  • 🔄 Perform a factory reset once a year (as described above).

For owners Murano 2020+ It's useful to disable automatic updates NissanConnect, since some updates conflict with the immobilizer system. You can do this in the menu Settings → System → Software updates.

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If your Nissan Murano equipped with a system ProPILOT Assist, immobilizer failures can disable it too. In this case, the dashboard lights up ProPILOT Unavailable before rebooting the system.

FAQ: Frequently asked questions about key problems in Nissan Murano

Is it possible to start the Murano without a key in emergency mode?

Yes, but only if installed in the car mechanical ignition switch (valid for models up to 2017). To do this:

  1. Remove the plastic trim around the start button.
  2. Under it you will find a hole for a mechanical key (included in the key fob kit).
  3. Insert the key and turn to position ON.

On Murano 2018+ There is no mechanical lock - you will have to call a tow truck or wait until the problem is solved (sometimes disconnecting the battery for 10 minutes helps).

How many keys can be programmed into one Murano?

Maximum - 4 keys. If you try to add a fifth, the system will erase the data of the first. Reprogramming all key fobs costs 3,000–6,000 rubles in the service.

Important: if all the keys are lost, the immobilizer unit will need to be replaced, since it is impossible to program new ones without at least one working key fob.

Why does Murano sometimes "see" the key and sometimes not?

This is a typical symptom unstable immobilizer antenna contact or interference from other devices. Check:

  • Is there a second key or phone nearby?
  • Are there any damages to the antenna wires (they often rub against the steering column).
  • Is the car battery discharged (voltage below 11.8 V causes malfunctions).

If the problem occurs only in wet weather, moisture may have gotten into the antenna.

Is it possible to disable the immobilizer in Murano?

Technically yes, but it breaks the law (Article 12.5 of the Code of Administrative Offenses of the Russian Federation) and voids the guarantee. In addition, disabling the immobilizer makes the car vulnerable to theft.

If the immobilizer constantly fails, it is better:

  • Update the control unit firmware.
  • Replace the antenna with the original one (285E3-JM00A for Murano Z52).
  • Install an additional security module (for example, Pandora or StarLine).
What should I do if my Murano doesn't see the key after replacing the battery?

This is a standard situation - the immobilizer system is reset. Solution:

  1. Insert the key into the lock (if there is a mechanical connector).
  2. Rotate to position ON and wait 10 minutes (the system is retraining).
  3. If it doesn’t help, you need to “bind” the keys again via Nissan Consult.

In some cases, disconnecting the battery terminal for 15 minutes helps (but this does not work on all models).