Author: Automotive expert specializing in Chinese vehicles, with hands-on experience in diagnostics, maintenance, and real-world operation of ICE, hybrid, and electric models.
The Geely Monjaro (sold in China as the Geely Xingyue L) comes with a large Android-based infotainment system, and, like almost any Android device, it has a hidden service section usually called the Hidden Menu, or engineering menu. Owners have been discussing it on forums for a couple of years now — some are trying to enable ADB to sideload apps, others just want to understand what the section is even for.
This article gathers what owners have reported about the Geely Monjaro’s engineering menu: how owners of different trims and firmware versions have tried to get into it, what risks are involved, and what has actually been achieved through it — based on real owner experience shared on the Russian-language platform DRIVE2 and other automotive forums.
⚠️ Before you start
The engineering menu is not documented by the manufacturer for end users and is intended for service technicians. Anything you do inside it is at your own risk. The avtomir.site editorial team does not encourage tampering with vehicle systems and shares this information for informational purposes only, based on publicly available discussions and owner experience.
The engineering (service) menu is a section of the infotainment firmware that isn’t exposed in the normal user interface. It exists for diagnosing hardware, testing modules, and adjusting parameters that don’t need to be touched in everyday use.
In theory, it can be used to:
view system service information — Android version, shell/skin version, module serial numbers;
test the touchscreen, speakers, cameras, Bluetooth, GPS, and USB ports;
access some display parameters — brightness, test patterns, calibration;
in some cases, enable ADB (Android Debug Bridge) mode to connect the head unit to a computer.
Which Monjaro versions this applies to
Based on owner discussions, the set of available options and the entry method itself depend on several factors: the head unit’s firmware version, whether the car is an unadapted export-market “Chinese-market” unit or one sold and serviced through an official dealer, whether a third-party localization or GMC firmware update has been installed, and the model year.
Even within the same model the picture is inconsistent: on some cars the entry code changed after a GMC firmware reinstall, and on newer 2025–2026 model-year cars, some of the older codes no longer work at all.
How owners try to get into the engineering menu
There is no single official entry method — the manufacturer does not publish this information for end users. Below are the methods that come up most often in owner discussions. Note: the codes below are taken from open forum discussions, are not confirmed by the manufacturer, and may not match your specific car.
Method 1: A code entered in the head unit’s Phone app
On most Monjaro units, entry is done through the head unit’s built-in dialer app, where a special character combination is entered instead of a phone number.
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Modified export-market (“Chinese-market”) units with third-party firmware (ENcars, Tesla-style, “Xanavi”-type and similar)
*1220*
Official dealer units / units reflashed to GMC firmware
#*32279
Cars with 2.0L engine and above (per some sources)
#*89757
Unmodified export-market units without third-party firmware
a formula along the lines of #*(month+5)(day, 2 digits)(hour, 12-hour format)
Units with community-made localization patches
##5656*, #1724*, or **5656#
Hi-P hybrid units with localization from independent installers
#*32279
⚠️ The reports are inconsistent
Even owners disagree with each other: in one DRIVE2 discussion the formula for 1.5-liter versions is given as “month+5,” while another source states “month+10.” On a 2026 model-year car purchased in the UAE, none of the known codes worked at all. This suggests the manufacturer periodically changes the access logic, and there is no single formula that works across all Monjaro units.
Method 2: A tap sequence on interface elements (reported on Flagship SE trim)
On some 2025 model-year Flagship SE trims, owners describe a different method: ten rapid taps on the Monjaro logo at the top of the screen, followed by two taps on “Software Version.” Owners note that even after getting into the menu on this trim, it isn’t always clear what each option does — the section is partly in Chinese and poorly documented.
Method 3: A “developer mode” via repeated taps on the firmware version
Similar to standard Android devices (phones, streaming boxes, head units in general), some owners report activating a separate section through a series of seven taps on the firmware version number under “About System.” On facelifted versions, owners say the resulting menu is noticeably more limited than on pre-facelift cars.
⛔ What not to do
Even after gaining access, owners consistently warn: don’t touch settings whose purpose you don’t understand, don’t remove system apps, and don’t change parameters related to the CAN bus or safety systems. A single wrong setting can cause the head unit to glitch or require a full firmware reflash — and on newer cars, this can also be grounds for the dealer to deny warranty coverage on the infotainment unit.
What owners have actually managed to do through the engineering menu
Viewing system information and running diagnostics
The most basic and safest use case is checking the Android version, shell version, and module serial numbers, and testing the touchscreen, speakers, surround-view cameras, GPS, and Bluetooth modules. Most owners stop here.
Enabling ADB and installing apps
A separate and much-discussed topic is enabling ADB (Android Debug Bridge) mode to connect the head unit to a computer. Based on owner reports, the ADB toggle isn’t always visible or enabled by default in the menu — it needs to be turned on separately inside the engineering section, and this doesn’t work on every firmware version.
Owners who successfully enabled ADB describe downloading a basic Russian-language interface localization and installing the RuStore app store in about 20–30 minutes with a laptop and a USB-A-to-USB-A cable (a standard USB-A-to-USB-C cable reportedly does not work for this procedure). There is also a third-party ADB script for the Geely Monjaro / Xingyue L published by an enthusiast on GitHub — using scripts like this is also done entirely at the owner’s own risk and outside the manufacturer’s warranty terms.
Additional apps
After enabling ADB, some owners install third-party apps — app stores, browsers, navigation and music services, file managers. Support for specific apps depends heavily on the firmware and Android version on a given head unit.
Does the Hidden Menu affect the warranty?
Simply opening the engineering menu is generally not considered tampering with the vehicle’s systems. Problems start when an owner changes system parameters, installs third-party software, or reflashes the head unit — in that case, the dealer is within its rights to deny warranty coverage on the infotainment unit. Before making any changes, it’s worth documenting the original settings where possible (screenshots, a configuration export if available).
Frequently asked questions
No. Based on owner discussions, the code depends on the car’s origin (official dealer, unmodified export unit, or GMC-reflashed unit), the firmware version, and even which localization patch is installed. On some new 2025–2026 cars, none of the known codes work at all.
Owners report cases where incorrect actions in the menu caused the head unit to malfunction and required a firmware reinstall. Changing parameters related to the CAN bus and safety systems is especially risky.
The most common reasons cited are wanting a localized interface on unadapted export units, adjusting the navigation head-up display projection, changing the instrument cluster appearance, or enabling ADB to install apps such as RuStore.
Yes, and this has already happened: owners note that after firmware updates, previously working codes stopped functioning, and on some newer cars none of the previously known methods work at all.
What owners are saying
The comments below are a brief paraphrase of real discussions among Geely Monjaro owners on the Russian-language platform DRIVE2, restated in our own words with a link to the original source. These are not direct quotes and do not reflect the opinion of the avtomir.site editorial team; we cannot verify the accuracy of each individual account and present them only as an illustration of real-world ownership experience.
One owner of an unmodified export-market unit reports that entering the *1220* code prompted the system to ask for an additional password; other participants in the discussion suggested alternative codes and advised that, in difficult cases, it can help to contact specialists who can remotely provide the password based on the software version.
An owner of a Chinese-market unit with 1.5L-spec firmware says they haven’t experienced head unit freezes, whereas some owners running 1.3L-spec firmware mention lag in the comments; the same thread also discusses that once full CarPlay support arrives, the need for a localized menu should disappear on its own.
Source (Russian-language): “Geely Monjaro engineering menu on unmodified Chinese-market units,” DRIVE2 — drive2.ru/l/664559672308537016
An owner of a Flagship SE trim describes entering the menu with ten taps on the Monjaro logo followed by two taps on the software version, but admits it isn’t entirely clear what to do with the menu once it’s open. In the comments, another owner shares that the code changed after a GMC firmware update: one code worked on version 1.3, and a different one after upgrading to version 2.0; they explain their motivation as wanting to extend the navigation head-up display, change the instrument cluster’s appearance, and set up a more comfortable seating position for a passenger.
Another owner compares entering the menu to activating developer mode on ordinary Android devices — phones, streaming boxes, head units in general — and says that on their facelifted car, the accessible menu turned out to be noticeably more limited than expected; they mention continuing to search for the Android-side PIN code on their own.
An owner who managed to get into the engineering menu of an unmodified export unit says the excitement was short-lived, since ADB mode wasn’t enabled by default, which delayed installing apps; they also mention planning to keep searching for the PIN code on Chinese-language automotive forums.
Source (Russian-language): “Installing apps without reflashing a Geely Monjaro,” DRIVE2 — drive2.ru/l/664766105616657779
A recent post describes downloading a basic interface localization and installing RuStore: according to the author, the key step was enabling ADB from inside the engineering menu itself, since the relevant toggle isn’t visible there by default; the whole process, including connecting via a USB-A-to-USB-A cable, took about 20 minutes.
An owner of a 2026 model-year car bought through an official dealer in the UAE reports that none of the entry methods found online worked, despite the interface already having a factory localization; commenters suggested contacting the official dealer directly for guidance.
The Geely Monjaro’s engineering menu is a real but unofficial tool, and access to it works differently for different owners depending on the car’s origin, firmware, and model year. Owner experience shows two things at once: on one hand, ADB access can genuinely be used to install a localization and useful apps; on the other, there’s no single reliable way in, and careless changes inside the menu can cause head unit malfunctions and warranty issues. If you don’t need this access for a specific purpose — such as the lack of a localized interface on an unadapted car — it’s safer to leave the menu alone altogether.
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