This immobilizer delete (IMMO OFF) service is designed for 1999–2002 Volkswagen Golf, Jetta, Beetle, and Cabrio models equipped with Bosch M3.8 or M5.9 ECUs. If your vehicle starts and then immediately shuts down due to an immobilizer fault, this service disables the immobilizer function inside the ECU, allowing the engine to run without immobilizer interference.

This service is commonly used when immobilizer synchronization has failed, keys are no longer recognized, or when replacing an ECU where immobilizer pairing is no longer possible.

What This IMMO Off Service Does

We modify the internal ECU software to bypass the immobilizer system. Once completed, the ECU will no longer require immobilizer authorization from the instrument cluster or key transponder in order to keep the engine running.

After installation, the vehicle will start and continue running normally without immobilizer-related shutdowns.

Important Service Requirements

For this service to work correctly, the following conditions must be met:

• The vehicle must start and then shut down due to an immobilizer fault

• This service will not fix a no-start condition where the engine does not crank or fire at all

• The immobilizer warning light may remain illuminated after the service

• All diagnostic trouble codes should be cleared before or after installation

If your vehicle does not meet these conditions, contact us with your ECU part number before shipping.

Supported Volkswagen Models (1999–2002)

This IMMO OFF service supports the following vehicles equipped with Bosch M3.8 or M5.9 ECUs:

• Volkswagen Golf / GTI (1999–2001, 2.0L)

• Volkswagen Jetta (1999–2001, 2.0L)

• Volkswagen Beetle (1999–2001, 2.0L)

• Volkswagen Cabrio (1999–2002, 2.0L)

Supported ECU Part Numbers

06A906018 Series

06A906018AD, 06A906018AQ, 06A906018BG, 06A906018BT, 06A906018CH, 06A906018CJ, 06A906018CR, 06A906018EF, 06A906018EN, 06A906018EQ, 06A906018ER, 06A906018FA, 06A906018FB, 06A906018FL, 06A906018HD, 06A906018JJ, 06A906018JM, 06A906018JQ, 06A906018R

037906018 Series

037906018A, 037906018AC, 037906018C, 037906018D, 037906018E, 037906018F, 037906018G, 037906018H, 037906018M, 037906018P, 037906018R

These part numbers are supported by this immobilizer delete service and must not be used as an interchange guide between different ECU variants.

Texas-Based Service With Nationwide Mail-In Support

We are located in Texas and provide Volkswagen immobilizer delete services for customers throughout Austin, San Antonio, Houston, Dallas–Fort Worth, and across Central Texas. Nationwide mail-in service is available for customers outside Texas.

How the Process Works

Purchase the IMMO OFF service and remove the ECU from your vehicle. Package the ECU securely in a padded box.

Include a printed note with the following information:

• First and last name

• Contact phone number

• Return shipping address

• Vehicle year, model, and VIN

Ship the package to:

ClusterFix Texas
16044 N Hwy 123
San Marcos, TX 78666

After shipping, send tracking information to info@clusterfixtexas.com or text (512) 792-1717.

What to Expect After Service

Once the ECU is returned and installed, the engine will start and continue running without immobilizer shutdown. No immobilizer matching or dealer programming is required. Clearing fault codes is recommended after installation.

FAQ

Will this fix a no-start condition?
No. This service only applies if the vehicle starts and then shuts down due to the immobilizer.

Will the immobilizer light stay on?
Yes. In many cases, the immobilizer warning light will remain illuminated.

Is additional programming required after installation?
No. The ECU will function independently of the immobilizer system.

Do you service customers outside Texas?
Yes. This is a nationwide mail-in service, though we are based in Texas.