If you are the owner Nissan and are faced with the need to update the firmware of a multimedia system or control unit, then the name Petrov and Goliath you're probably familiar with it. This is an unofficial, but widely used software in service centers for flashing electronic modules of brand cars. Unlike official updates through dealers, this method allows you to update the software yourself, saving time and money. However, the process requires caution: one mistake can lead to blocking the system or even failure of individual modules.
In this article we will look at how to use it correctly Petrov and Goliath, which firmware versions are suitable for your model Nissan, and what to do if something goes wrong. We will also analyze reviews from owners and experts so you can avoid common mistakes. If you've never done flashing before, don't worry: step-by-step instructions with visual cues will help even a beginner figure it out.
What is Petrov and Goliath and why is it needed
Petrov and Goliath is a software package developed by Russian enthusiasts to work with electronic control units (ECUs) of cars Nissan, Renault And Datsun. Main purpose of the software:
- 🔄 Firmware update multimedia systems (NissanConnect, Carwings), climate control and transmission units.
- 🛠️ Recovery "dead" modules after unsuccessful updates or power failures.
- 🔍 Diagnostics ECU errors with code decoding output (analogue Nissan Consult).
- 🔐 Resetting service intervals and unlocking features (for example, activating the 360° camera on basic trims).
The main advantage over official methods is ability to roll back to the previous firmware version, if the new one was unstable. Dealers usually do not provide this option. However, there are also risks: an incorrectly selected software version can cause conflicts in the operation of the vehicle’s electronic systems.
⚠️ Attention: The program does not support models Nissan older than 2010 release. They require specialized equipment, e.g. KTAG or Kess V2.
Which Nissan models are supported?
The list of compatible cars is updated regularly, but as of 2026 Petrov and Goliath officially works with the following models:
| Model | Years of manufacture | Supported blocks |
|---|---|---|
| Nissan Qashqai (J11) | 2014–2021 | Multimedia, ABS, transmission |
| Nissan X-Trail (T32) | 2014–2023 | Climate control, ProPilot,Engine ECU |
| Nissan Juke (F15) | 2019–2026 | Multimedia, NissanConnect |
| Nissan Almera (G15) | 2019–2023 | Engine ECU, gearbox |
| Nissan Navara (D23) | 2015–2022 | All-wheel drive, multimedia |
To accurately check the compatibility of your car, download the latest version Petrov and Goliath from the official website and use the function Check Compatibility in the menu Tools. The program will automatically detect the VIN and modules available for updating.
- Qashqai
- X-Trail
- Juke
- Almera
- Navara
- Other
Preparing for the update: what needs to be done before updating the firmware
Before you begin the process, make sure you have completed all the preliminary steps. This minimizes the risk of failures and data loss:
Download latest version Petrov and Goliath from official source|
Check battery charge (at least 12.6 V)|
Prepare a USB drive (FAT32, no more than 32 GB)|
Make a backup of the current firmware (function Backup in the program)|
Turn off all energy consuming devices (headlights, air conditioning)
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Pay special attention USB flash drive. It must be formatted in FAT32 (not exFAT or NTFS!), and the firmware files are unpacked into the root directory. Using low-quality Chinese flash drives often leads to read errors during the update.
⚠️ Attention: If your Nissan equipped with a system NissanConnect with online services, before flashing the firmware, disconnect the car from the Internet. Otherwise, the system may block unofficial software.
Step-by-step instructions for updating the firmware
Firmware process via Petrov and Goliath consists of 5 main stages. Follow them strictly in order:
- Connection to car
Connect the laptop to the diagnostic connector
OBD-IIvia adapter ELM327 (recommended model - VGate iCar 2). Run Petrov and Goliath and select your model from the menuVehicle Selection. - Reading current firmware
Go to section
Read Flashand wait for the process to complete (may take 10–20 minutes). Save the backup file to your hard drive. - Selecting new firmware
In the catalog
Firmwareprogram, find the current version for your unit. Pay attention to the prefixes in the file name:- 📌
EU— European version (suitable for Russia). - 📌
AS— Asian (may not support Russian language). - 📌
NA- North American (incompatible with our Nissan).
- 📌
Click Write Flash and confirm the action. Don't turn off the power and do not remove the USB drive until the process is complete (the progress bar should reach 100%).
After rebooting the system, check the main functions: engine starting, multimedia operation, indicators on the dashboard. If errors occur (for example, U1000), return to the backup.
If the program gives an error Connection Failed, try reconnecting the adapter ELM327 or use a different USB port on your laptop. Often the problem is solved by disabling the antivirus, which blocks access to COM ports.
Common mistakes and how to avoid them
Even if the instructions are strictly followed, users encounter problems. Here are the most common of them and ways to solve them:
| Error | Reason | Solution |
|---|---|---|
Error 23: Checksum Mismatch |
Damaged firmware file or unstable connection | Upload the firmware, check the USB drive for errors (chkdsk) |
No Response from ECU |
Problems with the adapter ELM327 or food | Use original adapter, check battery voltage |
| Stuck at 99% of progress | Conflict with antivirus or background processes | Disable antivirus, run the program as administrator |
| Lost connection after update | Incompatible firmware version | Restore a backup or flash a known working version |
If after updating the message appears on the multimedia system screen System Error. Contact Dealer, don't panic. In 90% of cases the problem is solved factory reset via menu Settings → System → Reset. If this does not help, you will need to re-flash using a backup.
What to do if the car does not start after flashing?
If the engine does not start and all the indicators on the dashboard are on, there is most likely a failure in the engine control unit (ECU). In this case:
1. Disconnect the battery for 10 minutes (this will clear errors).
2. Connect Petrov and Goliath and try flashing the firmware again.
3. If it doesn’t help, contact the service to reflash the ECU via Boot Mode (soldering equipment required).
Owner reviews: pros and cons of the method
On forums such as Drive2 And Nissan Club Russia, users actively share their experience of using Petrov and Goliath. Here are the key takeaways:
- ✅ Pros:
- 💰 Save up to 15,000 ₽ compared to a dealer upgrade.
- 🔧 Possibility of rolling back to the old firmware in case of bugs.
- 📱 Activation of hidden functions (for example, Android Auto on basic versions).
- ❌ Cons:
- ⚠️ Risk of modules being “scrapped” due to errors.
- 🕒 The process takes 1-2 hours (at the dealer - 30 minutes).
- 📚 Requires technical knowledge (not everyone can do it).
According to statistics, about 85% of users successfully update firmware the first time. The rest encounter errors, most of which can be resolved by re-flashing or resetting the settings. Here is a typical review from Drive2:
"Stitched Nissan X-Trail 2020 through Petrov and Goliath — everything worked out the first time. Multimedia began to work faster, support appeared Apple CarPlay. The only caveat: after the update I had to manually tune the radio stations. Otherwise - great!"
— user AlexQashqai
Alternative ways to update firmware
If Petrov and Goliath for some reason does not work, consider alternative methods:
- 🔹 Official update from the dealer
Plus: guarantee and no risks. Disadvantage: high cost (from 5,000 to 20,000 rubles) and limited choice of versions.
- 🔹 Firmware via Nissan Consult III+
Professional equipment used in services. Suitable for complex cases (for example, disaster recovery).
- 🔹 Over-the-air (OTA) update
Only available for new models (eg Nissan Ariya). Automatically downloads firmware via the Internet.
For owners Nissan older than 2015 Petrov and Goliath remains the optimal solution in terms of price/quality ratio. However, if you are not confident in your abilities, it is better to turn to specialists.
Use Petrov and Goliath only if you are prepared for possible risks. For critical units (engine ECU, transmission), it is recommended to have a backup or backup module on hand.
FAQ: Frequently asked questions about firmware via Petrov and Goliath
Is it possible to update the firmware on a Nissan with more than 200,000 km on it?
Yes, mileage does not affect the ability to update. However, on older cars (especially those with worn-out wiring), it is recommended to connect an external power source to avoid voltage sags during flashing.
Where to download the current version Petrov and Goliath?
Official source - website petrov-goliath.ru. Avoid torrents and third-party resources: they often contain modified (and potentially dangerous) versions of the program.
What should I do if the rear view camera stops working after updating the firmware?
Most likely, the new firmware is incompatible with your camera version. Try:
- Restore old firmware from backup.
- Update the camera firmware separately (the files are usually included with the main software).
- Check the connections of the camera connectors (sometimes they come loose when working with multimedia).
Is it possible to flash a Nissan using a macOS laptop?
Technically yes, but you need to install it Windows through Boot Camp or virtual machine. Program Petrov and Goliath does not have a native version for macOS, and emulators (for example, Wine) do not guarantee stable operation.
How to check that the firmware was successful?
After update:
- Start the engine and check the instrument panel for errors.
- Make sure all media functions are working (radio, Bluetooth, navigation).
- Connect the diagnostic scanner and check for any error codes (for example,
U1000orB15A0).