Cold-Start RPM
On compatible calibrations, the pronounced raised-idle behavior can be adjusted for a quieter startup.
MG Flasher Calibration OptionBMW Cold Start
BMW Cold Start
Adjustment
Adjust supported factory cold-start behavior for a quieter startup. The option is configured before flashing and availability depends on the exact vehicle, ECU software and selected calibration.
Configured during the map-flashing workflow Explore OTS Maps →
OverviewReduce the Pronounced
Reduce the Pronounced
Cold-Start Routine.
The approved MG Flasher engine material describes Cold Start as a factory-calibrated function that increases idle RPM while the engine is cold. On compatible vehicles, adjusting this setting can create a quieter startup.
The exact result depends on the engine platform, exhaust system, ambient conditions, ECU software and the map being flashed. It should not be treated as a measured reduction in decibels or as a universal setting for every supported vehicle.
Simple Definition
Modify the supported factory cold-start calibration before flashing the selected map.
Cold EngineFactory startup routine
→Custom OptionsSelect adjustment where available
→Quieter StartCompatible calibration applied
What the Option Changes
A Startup Calibration Setting.
Cold Start Adjustment targets supported cold-start behavior; it does not replace the complete warm-up strategy.
Selected Before Flashing
The option is chosen in the available Custom Options workflow for a supported OTS or custom map.
Stored in the Active Map
The selected behavior remains part of the active calibration until another compatible configuration is flashed.
Configuration Workflow
Choose It Before Flashing.
Cold Start Adjustment is configured through the normal MG Flasher map-flashing workflow.
Connect the Vehicle
Connect MG Flasher through a supported ENET setup and open the vehicle in the app.
Check Support
Confirm vehicle, ECU software, map and option availability before purchasing or flashing.
Select the Map
Choose the compatible OTS map or tuner-prepared Custom Flash calibration.
Open Custom Options
Select the available Cold Start adjustment or removal option for that calibration.
Flash the ECU
Complete the flash with stable vehicle voltage and an uninterrupted connection.
Important Distinction
Cold Start Is Not Startup Roar.
Both affect the startup experience, but they serve different calibration goals.
Cold Start Adjustment
Reduces or modifies the supported factory raised-idle routine for a quieter cold startup.
Quieter startupStartup Roar
Configures a louder, more aggressive startup effect with available duration and aggression settings.
More aggressive startupWarm-Up Strategies
Cold Start Adjustment does not remove the need for correct oil temperature, careful driving or other OEM protection logic.
Still required
Map Support
OTS Maps and Custom Flash.
The option may be available through both MG Flasher map workflows, depending on the exact platform and calibration.
OTS Maps
Cold Start Adjustment is listed among additional options available with compatible OTS Maps.
Explore OTS Maps →Custom Flash
Compatible custom calibrations can expose cold-start options during the Custom Options workflow.
Explore Custom Flash →
Important Notes
Understand What Changes.
The feature adjusts a calibration option; the final result depends on the complete vehicle and setup.
No Fixed Sound Reduction
Actual volume and tone depend on the engine, exhaust hardware, ambient conditions and map configuration.
Not an On-The-Fly Control
This setting is part of the flashed calibration and is not selected through Live Control or the Custom Code Menu.
Warm-Up Still Matters
A quieter startup does not mean the engine, fluids or drivetrain are ready for high-load operation.
Off-Road Use Notice
MG Flasher documentation marks cold-start adjustment or removal as an off-road-use-only option.
Compatibility
Check the Exact Calibration.
Feature availability can vary by model, engine, ECU software, map version and selected license.
Supported Vehicle
Start with the relevant Engine or Vehicle Page and confirm MG Flasher support.
ECU Software
The ECU software must be supported for the selected OTS or custom calibration.
Available Map Option
Cold Start Adjustment must appear in the Custom Options workflow for the chosen map.
Flashing Access
A valid Flashing License, supported connection and any required ECU unlock must be in place.
FAQ
Cold Start Adjustment FAQ.
Common questions about quieter startup behavior, map configuration and compatibility.
What does BMW Cold Start Adjustment do?
On supported MG Flasher calibrations, it modifies the factory cold-start behavior that temporarily raises idle RPM when the engine is cold, allowing a quieter startup.
Does it guarantee a specific sound level?
No. The final sound depends on the vehicle, engine, exhaust system, calibration and operating conditions.
Is Cold Start Adjustment the same as Startup Roar?
No. Cold Start Adjustment is intended to reduce or modify the raised-idle cold-start routine. Startup Roar creates a louder and more aggressive startup effect.
Can I change Cold Start On-The-Fly?
No. It is configured as part of the active map before flashing and is not controlled through CCM or Live Control.
Is it available with OTS Maps?
Cold Start Adjustment is listed as an additional option for compatible OTS Maps, but availability must be confirmed for the exact vehicle and map.
Can it be used with Custom Flash?
Compatible tuner-prepared calibrations can expose cold-start options during the Custom Options workflow.
Does a quieter cold start mean the engine is warm?
No. Engine oil, coolant, gearbox and drivetrain still require appropriate warm-up before high-load driving.
Is Cold Start Adjustment intended for road use?
MG Flasher documentation labels cold-start adjustment or removal as an off-road-use-only option. Users must follow applicable local laws and regulations.
Ready to Check Your Vehicle?
Configure a Quieter Cold Start.
Confirm support, choose the correct map and review available Custom Options before flashing.