Module for editing firmware of Bosch MG1UA008 and MG1US008 control units for Chinese-made JAC, Wey, Haval, Saic, Chery, Changan, Dongfeng, and others.
Supported files are 2.5Mb and 4Mb.
Available for modification:
Air calculation: Mass of air through the throttle body, Calculation of nominal charge, Maximum required air flow rate limit, Maximum air flow rate for protection against overboost
Turbo control: Target boost pressure in calibration mode, Characteristic degree of high dynamic turbine pressure, Compression ratio for protection against compressor speed exceedance, Compressor efficiency, Compression ratio for protection against turbine speed exceedance, Required position of boost pressure actuator, Wastegate characteristic field standard sizes, Compressor efficiency correction factor
Engine speed limitation: Engine speed limitation at high temperature, Engine speed limitation by gear, Maximum engine speed at high oil temperature, Engine speed limitation in case of vehicle speed detection error, Maximum engine speed, Maximum engine speed in manual mode, Maximum engine speed in sport mode, Stationary engine speed limitation, Stationary engine speed limitation at high engine temperature, Stationary engine speed limitation in manual mode, Stationary engine speed limitation in sport mode
Fan control (test)
Functional control: Engine optimal torque map during functional control, Optimal ignition angle, Ignition efficiency depending on delta-ignition angle during control, Lambda-dependence of optimal ignition angle during functional control, Lambda efficiency during functional control, Maximum internal torque during control, Air transfer charge coefficient in monitoring
Idle speed control: Desired idle speed
Detonation control: Detonation detection coefficient characteristic, Cylinder counter
Lambda: Nominal lambda-delta for component protection, Lambda component protection, Lambda component protection in case of camshaft position error, Lambda correction of exhaust gas temperature at valve block, Engine exhaust lambda during after-start, Engine nominal lambda during warm-up with active A/F regulation, Lambda enrichment for component protection, Target lambda value to prevent premature ignition, Minimum lambda value for component protection, Nominal lambda value for component protection, Lambda efficiency
Limiters: Vehicle speed limitation by gear, Maximum vehicle speed for cruise control, Minimum vehicle speed for cruise control
Required torque: accelerator pedal in sport mode, driver-commanded torque limit, engine torque, pedal reverse position, torque load for low idle speed, torque load for reverse gear, maximum specified torque for overload protection, maximum specified torque limit coefficient for overload protection, Optimal engine torque, Required torque in additional mode, Maximum displayed torque for overload protection, Maximum torque parameter, Minimum torque parameter
Spark advance: Spark advance in additional mode, Ignition advance angle characteristic, Ignition advance angle delta from efficiency coefficient
Temperature correction: Compensation of intake air temperature for determining ambient air temperature, Calculated exhaust gas temperature, Homogeneous mode of exhaust gas temperature valve, Exhaust gas temperature correction based on intake air temperature, Exhaust gas temperature valve with correction offset based on air temperature in the manifold, Exhaust gas temperature valve with correction offset based on ambient temperature, Temperature coefficient for throttle air
Throttle control: Required throttle angle, Throttle angle at maximum mass flow rate, Full load recognition threshold, Throttle angle dependent on accelerator pedal position
VVT: Exhaust camshaft position, Intake camshaft position
Diagnostic trouble code mask
To use the module, you need to purchase a BitEdit USB protection key BitEdit. The key can be purchased in our store. You can purchase an unlimited number of modules for one key.
Updates of descriptions for new software versions within the module are free.
Module activation is performed within 1 hour on business days (usually 10-15 minutes). Activation may be delayed on weekends and holidays (up to 2 hours).
Only the serial number of the key and email are required to activate the module.
1. No Refunds or Modifications for Digital Licenses
Activated modules or licenses cannot be returned or refunded.
If an incorrect key or device number is entered by the customer, the purchase is not eligible for return.
Licenses cannot be modified, transferred, or reissued for another device under any circumstances.
2. Irreversible Order Processing
After the order status changes to “Waiting for activation”, the data has already been sent to the developer.
From this point onward, the order cannot be canceled, edited, corrected, or refunded.
3. Responsibility for Software Functionality
Our store is not responsible for the functionality, performance, or declared features of any software module.
We do not guarantee the listed functions because we are not the developer.
4. Accuracy of Product Information
Module and script descriptions are provided directly by the manufacturer.
IOBD.io is not responsible for any inaccuracies, missing details, or differences between the description and actual operation.
In disputed situations regarding functionality or listed features, the customer must contact the manufacturer.
5. Customer Responsibility for Installation
IOBD.io sells professional automotive diagnostic software and equipment.
Installation, setup, configuration, and compatibility checks must be performed by the customer.
We do not provide remote installation, programming, or setup services unless explicitly stated otherwise.
6. Required Technical Knowledge
These products are intended for users with basic technical knowledge in automotive diagnostics.
The customer is fully responsible for understanding the installation process and using the software and hardware correctly.
7. No Liability for Incorrect Usage
IOBD.IO is not responsible for issues caused by:
incorrect installation
unsupported or incompatible hardware
improper configuration
third-party interference
Important:
This function is available only on certain BMW engines and is NOT applicable to other vehicle brands.
The information below applies only to stock engines with factory ECU software and a standard exhaust system.
What This Parameter Actually Represents
This is NOT a direct measurement of fuel octane and is NOT a direct octane reading calculated by the ECU.
The value is an adaptation factor ranging from 0 to 1, where:
- 0 = no correction
- 1 = maximum correction
According to BMW’s internal definition:
Faktor adaptierte Kraftstoffqualität (0 = ROZ98 / 1.0 = ROZ91)
- 0 corresponds to 98 ROZ
- 1.0 corresponds to 91 ROZ
ROZ is the German equivalent of RON (Research Octane Number).
The device converts this multiplier into a more intuitive octane value for user convenience.
⚠️ The device does not measure anything itself.
It only displays the data provided by the engine control unit (ECU).
How the ECU Evaluates Fuel Quality
Each ECU has different calibration sensitivity:
- Sensitivity to the adaptation factor
- Sensitivity of the knock control system
Fuel quality is evaluated subjectively by the ECU, primarily based on:
- Knock ignition timing corrections
- Overall engine noise levels
BMW G-Series & LCI F-Series (B-Engines)
B38 / N63 / S63 / N74
These engines are highly sensitive to octane adaptation.
- During warm-up and cruising, the displayed octane may frequently drop to 95 or lower.
- This does NOT automatically indicate poor fuel quality.
- Under load, the value should increase.
⚠️ If the value continues to decrease under load, this may indicate a problem.
B46 / B48 / B58
These engines have low sensitivity.
- During cruising, octane will typically display maximum values even with mediocre fuel.
- Under load, the value will decrease if fuel quality is truly poor.
S58
Octane correction is virtually inactive.
- It will typically always show 98.
- If it drops below 98, fuel quality is genuinely very poor.
BMW F-Series (Pre-LCI) with N/S Engines
Most pre-LCI F-series ECUs do not calculate octane adaptation.
Do not expect this parameter to function.
S55
- Octane parameter not used by the system
- Display not supported
- However, display of the last 5 refueling quality events is supported
S63
- Octane parameter not used
- Display not supported
- Refueling quality display not supported
BMW E-Series
Octane parameter not available. Display not supported.
Important Notes About Tuned Vehicles
With modified hardware or custom tuning, behavior may vary significantly. Always consult your tuner regarding expected operation.
Key principles:
- If octane drops under load, it means fuel quality is worse than expected under those conditions.
- This does NOT automatically mean the fuel itself is bad.
Examples:
- If a tuner increases ignition timing and boost pressure, even good fuel may cause knock corrections, and the ECU may interpret it as poor fuel.
- Thin-walled or poorly mounted exhaust systems may create parasitic noise, which the ECU may interpret as engine knock, causing negative correction.
- Conversely, if knock sensitivity is reduced or octane correction is disabled in tuning, readings may appear ideal while actual engine safety is compromised.
