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Bosch ECU security access service

Bosch MG1 & MD1 ECU Unlock Service

Professional Nationwide Mail-In MG1 / MD1 Unlock

We provide a professional mail-in unlock service for supported Bosch MG1 and MD1 engine control units. Each ECU is reviewed by its complete Bosch and OEM part numbers, hardware and software identification, vehicle application, and current condition before service approval.

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Supported Service Scope

  • Bosch MG1 gasoline engine control units where supported
  • Bosch MD1 diesel engine control units where supported
  • Bench service with module-specific access procedures
  • Original ECU data backup when readable and applicable
  • Post-service communication and identification verification
  • Support for independent repair shops, dealers, and calibration professionals

When an MG1 / MD1 Unlock May Be Required

  • A supported calibration tool requires the ECU to be unlocked first
  • Normal diagnostic access is available but calibration writing is restricted
  • The ECU protection level requires a professional bench procedure
  • A tuning or repair professional needs supported read and write access
  • The ECU was updated and its current access state must be reviewed again

Compatibility Information We Need

  • Vehicle year, make, model, engine, and VIN
  • Clear photos of all Bosch and manufacturer labels
  • Complete Bosch and OEM part numbers
  • Hardware and software identification when available
  • Current ECU condition and any previous programming attempts
  • The read/write tool or downstream workflow you plan to use

Our Mail-In Unlock Process

  • Review the submitted ECU and vehicle identification
  • Confirm support before the module is shipped
  • Inspect the ECU after arrival and verify communication
  • Create a backup where the module and process support it
  • Complete the applicable unlock procedure
  • Verify identification and communication before return shipping
Before you ship

Frequently Asked Questions

Confirm the module details with us before shipping if the part number, condition, or required service is uncertain.

What is a Bosch MG1 or MD1 ECU unlock?

An unlock prepares a supported Bosch MG1 or MD1 engine control unit for compatible calibration read and write access. The exact method and available access depend on the ECU family, hardware, software, and protection version.

Does the unlock include a performance tune?

No. This page covers the ECU unlock service. Custom tuning, calibration changes, emissions-related requests, and tool-specific file services are separate and must be reviewed independently.

Can every MG1 or MD1 ECU be unlocked?

No. Support varies by the exact ECU family, Bosch and OEM part numbers, hardware version, software version, and previous programming history. Send clear label photos and identification before shipping.

What information is required before I ship the ECU?

Provide the vehicle year, make, model and VIN; clear photos of every ECU label; complete Bosch and OEM part numbers; HW and SW identification when available; and the tool or workflow that will be used after the ECU is returned.

Do I need to mail in the ECU?

For this service, the supported ECU normally needs to be removed from the vehicle and shipped to us. Do not ship until compatibility and the order details have been confirmed.

Can later dealer programming change the unlock state?

A dealer or OEM software update may replace ECU software or change its access state. Contact us before applying an update if continued aftermarket access is required.

Nationwide mail-in service

How Your Module Moves Through the Process

Submit the module details first so the requested service and shipment stay connected to the correct order.

1. Submit details

Provide the vehicle, module, part number and requested work.

2. Ship securely

Package the electronics carefully and include the order reference.

3. Review and service

We verify the submitted information and complete the approved work.

4. Return shipment

Track order progress and the return shipment through your account.

Read the complete mail-in process →
Ready to get started?

Send us your module information today.

Typical service is completed within 1–2 business days after the ECU arrives and compatibility is confirmed.

Start a MG1/MD1 Unlock Order