Take your BMW’s performance to the next level with the CTZ Flasher Method — the easiest and most flexible way to tune your vehicle from anywhere in the world.
 

We support multiple flashing options including CTZ Flasher, MHD, and BOOTMOD3, giving you the freedom to choose the method that best fits your car and setup.
 

How It Works

• Place your order and provide your vehicle details at checkout.

• Select your flashing method (CTZ Flasher, MHD, or BOOTMOD3).

• We’ll confirm if your ECU requires an unlock before tuning.
   

Unlock Requirements

• 2019 BMW models:
  Require an in-house ECU unlock performed by Custom Tunez before tuning.

• 2020+ BMW models (manufactured June 2020 and newer):
  Require a FEMTO unlock or processing through our third-party unlock partner.
  We’ll provide a prepaid shipping label for you to send your ECU for unlocking.

Once your ECU is unlocked and returned, you’ll be able to flash your tune directly from your phone using your preferred platform — no laptop or remote desktop required.
 

After the Unlock

Once your ECU is ready:

• You can flash your car directly from your phone using CTZ Flasher, MHD, or BOOTMOD3.

• Our team will remotely assist you through the entire flashing process.

• No downtime, no shipping back and forth, and no complicated setup — just plug in and flash.
   

Why Choose Custom Tunez

• Support for BMW models from 2012–2024

• Full unlock and tuning service for all ECUs (MG1, MD1, MEVD, etc.)

• Flash directly from your phone — no laptop needed

• Backed by expert support from the Custom Tunez team
   

Important Note

If your BMW requires an unlock (2019+ models), we’ll contact you after checkout to confirm the correct unlock method and provide shipping instructions.

After the unlock is completed, you’ll be able to manage all tuning directly from your smartphone with full Custom Tunez support.