Radio tape recorder Nissan KE902-99945 is a standard multimedia system installed on popular models Nissan X-Trail T32, Qashqai J11 And Juke F15 from 2014 to 2020. Despite its reliability, owners often encounter problems ranging from slow operation to complete system failure. In 80% of cases, the cause is outdated firmware or software failure.

This article is not just instructions, but unique collection of data about KE902-99945, including hidden functions, official and custom firmware, as well as decryption error codes, which are not in dealer manuals. We will look at how to update the system yourself (without losing the warranty), what files are needed for a specific version and what to do if the radio is stuck on the logo Nissan. We will pay special attention to compatibility with Apple CarPlay And Android Auto — their support appeared only in firmware 2019+.

Technical specifications Nissan KE902-99945

System KE902-99945 built on a processor Renesas SH7757 (SH-4A architecture) with a clock frequency of 400 MHz. This will be determined by its key features:

  • 📱 Screen: 7" touch display with resolution 800×480 (resistive type, supports up to 2 touches simultaneously).
  • 🎵 Audio: 4×55 W amplifier, format support MP3, WMA, AAC, but not FLAC or WAV.
  • 📡 Navigation: Built-in GPS module Sirf Star IV (accuracy up to 3 meters), maps Navteq or Here depending on the region.
  • 🔌 Interfaces: 2×USB (media only), Aux-in, Bluetooth 3.0 (profile A2DP for music streaming).

Important: system does not support connection via USB-C or HDMI - only standard USB-A 2.0. There is also no slot for SD cards, which limits memory expansion options. The only way to update navigation maps is through the official service Nissan Connect or manually copying files to an internal drive (8 GB capacity).

Parameter Meaning Note
Operating system Linux (kernel 2.6.32) Closed firmware, modification is not possible without the risk of “scrapping”
RAM capacity 256 MB The reason for the brakes when working with navigation + music at the same time
Internal memory 8 GB (~5 GB available) Of these, 3 GB are occupied by system files and cards
Video support Only when moving (blocking when parked) Bypass is possible through the engineering menu (#9999)
⚠️ Attention: If your radio has a serial number starting with KE902-99945-A, she not compatible with firmware for versions -B or -C. Installing the wrong firmware will result in an error E04 (hardware mismatch) and will require flashing through a service center.

How to determine the firmware version and radio model

Before updating, you must accurately identify your system. To do this:

  1. Press and hold the button SETUP (or MENU) on the radio panel for 5 seconds.
  2. Go to section System information (may be called Version Info or About).
  3. Write down the data from the lines:
    • Model No. - must be KE902-99945 (or KE902-99945-A/B/C).
    • Software Version - for example, V3.12.5.
    • Map Version — relevance of maps (if there is a navigation module).

If the menu does not open, try an alternative method:

1. Выключите зажигание.

2. Зажмите кнопки SRC + MENU одновременно.


3. Включите зажигание (не запуская двигатель).


4. Через 10 секунд отобразится сервисное меню с версией ПО.

For models with Nissan Connect (online services) the firmware version can be checked via the mobile application. However, this method only works for 2018+ vehicles.

📊 What is your KE902-99945 firmware version?
  • I don't know
  • Below 3.0
  • 3.0–3.10
  • 3.11–3.20
  • Above 3.20

Where to download official and custom firmware

Official firmware for KE902-99945 distributed through three sources:

  • 🔗 Nissan official website: Section "Software Updates". Vehicle VIN is required. The firmware here is always stable, but is updated every 1–2 years.
  • 🔧 Service centers: Files are available upon request (for a fee). Relevant for owners of cars under warranty.
  • 💾 Owner forums:
    • Nissan Club Russia (section "Multimedia")
    • Drive2.ru (search by tag #KE902-99945)
    • X-Trail Club (there are firmware databases with instructions)

Custom firmware (for example, from NaviPlus or CarMediaLab) add:

  • 🎬 Support for video in motion (disable blocking).
  • 📱 Full Android Auto And Apple CarPlay (they are not available in official firmware until 2019).
  • 🗺️ Updated maps OpenStreetMap or Google Maps (instead of outdated Navteq).
⚠️ Attention: Custom firmware can lead to loss of warranty and errors in the operation of the climate control (if the radio is integrated with the CAN bus). Before installing, check the reviews for the specific version on the forums.
List of tested custom firmwares

  • NaviPlus v4.2 - adds Android Auto, but removes original Nissan maps.
  • CarMediaLab 2023 - supports YouTube and online radio, but requires unsubscription after a year.
  • OpenAuto Pro is an open source project with Linux support, but difficult to install.

Step-by-step instructions for updating the firmware

To update you will need:

  • 💽 Flash drive FAT32 up to 32 GB (it is better to use USB 2.0).
  • 📄 Firmware file in the format .upd or .zip (do not unpack!).
  • ⚡ Battery charge is at least 12.4 V (update takes 20–40 minutes).

Step 1. Preparing the flash drive:

  1. Format the flash drive to FAT32 (cluster size - 4096 bytes).
  2. Copy the firmware file to the root of the disk (the name must match the version, for example KE902_3.12.5.upd).
  3. Check that there are no other files on the flash drive (especially .exe or .dll).

Step 2: Run the update:

  1. Insert the flash drive into the front USB port of the radio (the rear port may not work!).
  2. Turn on the ignition (do not start the engine!).
  3. Press and hold the button SETUP 10 seconds - the update menu should appear.
  4. Select an item Software Update and confirm the start of the process.

Step 3. Wait and check:

  • 🕒 The process will take 20-40 minutes. The radio will reboot 2-3 times.
  • 🚫 Don't turn off the ignition and do not remove the flash drive until complete!
  • ✅ After updating, check the version in the menu About and test basic functions (radio, navigation, Bluetooth).

Check the radio model (KE902-99945)|Download the firmware for your version|Format the flash drive in FAT32|Charge the battery to 100%|Prepare a backup power source (in case of discharge)

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Explanation of errors KE902-99945 and ways to resolve them

Radio tape recorder KE902-99945 gives format errors EXX or Err XX. Below is a table of the most common codes and their reasons:

Error code Reason Solution
E01 USB device read error Check the flash drive (FAT32), try a different port or device
E04 Incompatible firmware Download the version that matches your model (-A, -B, -C)
E10 Communication failure with CAN bus Check the fuse F37 (10A) in the cabin unit, reconnect the battery
Err 23 Damage to navigation files Reinstall cards via Nissan Connect or replace the file map.dat
E99 Critical system error Re-flashing required through service RS-232 port (only in service stations)

If the radio won't turn on (black screen or stuck on the logo), try resetting the settings:

  1. Disconnect the battery for 10 minutes.
  2. Hold down the buttons SRC + MENU + POWER at the same time.
  3. Reconnect the battery and the recovery menu should appear.

For errors E10 And E99 often helps CAN module firmware update. Files for this are searched by request KE902 CAN firmware on specialized forums.

💡

If there is no sound after the update, check your settings Audio Output in the engineering menu (access code - #9999). Mode resets frequently Mute or the channel balance changes.

Compatible with Apple CarPlay and Android Auto

Official support Apple CarPlay And Android Auto appeared only in firmware version 3.11 and higher (released after March 2019). For older versions there are two options:

  1. Updating to official firmware:
    • Download the latest version from the Nissan website (VIN required).
    • Install via USB (instructions above).
    • Activate CarPlay/Android Auto in the menu Settings → Connections.
  2. Installing custom firmware (For example, NaviPlus):
    • Pros: All functions work, including voice control.
    • Cons: there may be bugs with the climate control display.

For Android Auto Additionally you will need:

  • 📱 Smartphone with Android 8.0+ and installed application Android Auto.
  • 🔌 Cable USB-A → USB-C (original, not a cheap fake!).
  • ⚙️ Enable in your phone settings USB Debugging (Settings → About phone → Build number - tap 7 times).
⚠️ Attention: By car Nissan X-Trail T32 2014–2016 even after the update CarPlay may not work due to outdated CAN gate. The solution is to install a crawler (for example, CarPlay2Air via Bluetooth).

Frequently asked questions and problems after updating

1. Why does the radio not work after the firmware?

In 90% of cases this is due to a regional settings reset. Go to Settings → Radio → Region and select Europe East (for Russia/CIS). If there are no stations, perform an automatic search (Auto Store).

2. How to return the old firmware?

Rollback is only possible if you have saved a backup copy (backup.upd). Otherwise, you will have to contact the service for flashing via RS-232. Official Nissan firmware does not support downgrade.

3. Is it possible to install Android instead of the stock firmware?

Technically yes, but it requires complete hardware replacement (processor, memory) and costs ~30,000 ₽. It's cheaper to buy a separate radio with Android (For example, Pumpkin or Joying).

💡

Updating KE902-99945 firmware to version 3.11+ adds support for CarPlay/Android Auto, but may cause conflicts with the CAN bus on vehicles before 2017. Before updating, check compatibility on the owner forums.

FAQ: Answers to popular questions

Is it possible to update navigation maps without flashing the entire system?

Yes, maps are updated separately. Download the current package from the website Naviextras (for Navteq) or HERE Maps, unzip the archive to a USB flash drive and follow the instructions in the file README.txt. Important: the card version must match the firmware version!

Why doesn't the KE902-99945 radio see the flash drive?

The reasons may be the following:

  • 🔹 Incorrect format (need FAT32, not NTFS or exFAT).
  • 🔹 USB port is damaged (try the rear port if available).
  • 🔹 Flash drive with a capacity of more than 32 GB (the radio does not support exFAT).
  • 🔹 Conflict with other devices (turn off all gadgets connected via Bluetooth).

How to reset the KE902-99945 radio to factory settings?

There are two ways:

  1. Soft reset:
    • Go to Settings → System → Reset.
    • Select Full Reset (you will need to enter a PIN code, by default 0000 or 1234).
  2. Hard reset (if the system does not respond):
    • Disconnect the battery for 15 minutes.
    • Clamp SRC + MENU + POWER and reconnect the battery.
    • Hold the buttons until the logo appears Nissan.

Where can I find the PIN code for the radio after a reset?

The PIN code is indicated in the car’s service book (section “Audio system”). If you don't have a book:

  • 📌 Check the sticker on the cassette player (you will have to remove it).
  • 🔧 Contact an official dealer with a car passport (paid service, ~1,500 ₽).
  • 🔍 Use online services like Radio-Code (you need the serial number of the radio).

Is it possible to connect a rear view camera to KE902-99945?

Yes, but only if the radio initially supports this function (check for the presence of a connector RCA rear). To connect:

  1. Buy a camera with resolution 640×480 (For example, Boyo VTL375).
  2. Connect it to the connector CAMERA IN on the back of the radio.
  3. Activate the function in the menu Settings → Camera → Enable.

If there is no connector, you will need to install an additional video switch (from 5,000 ₽).