Have a failed or defective Audi A4, A5, or Q5 BCM and don't want to hunt down a compatible used replacement yourself?

With this service, simply mail us your original BCM. Lacorte Automotive will provide a compatible remanufactured replacement BCM, transfer the applicable vehicle-specific data from your original module, test the completed replacement, and ship it back to you.

We Provide the Replacement Module

Unlike our standard cloning service, you do NOT need to purchase or send us a donor BCM.

You send us your original module, and we provide the compatible remanufactured replacement.

Your replacement BCM includes a 3-Year Warranty for added peace of mind.

Common BCM Failure Symptoms

A failing BCM may cause symptoms such as:

• Vehicle will not start or intermittently will not start
• Key recognition/start authorization problems
• No response when attempting to start
• Intermittent electrical problems
• Multiple electrical systems malfunctioning
• BCM communication faults
• Module no longer communicates with diagnostic equipment
• Water or moisture damage
• Internal electronic failure
• Existing BCM requires replacement due to physical or electrical damage

Proper diagnosis is recommended before ordering, as wiring, battery, electrical, or other module faults can produce similar symptoms.

Supported Audi BCM Modules

This service currently covers:

Audi A4 / A5 / Q5

• BCM – D70F3380
• BCM – D70F3634

Not sure which version you have? Send us a clear picture of your BCM label before ordering and we'll help verify compatibility.

How It Works

1. Purchase the Service

Place your order through our website.

2. Mail Us Your Original BCM

You only need to send us your original BCM. No donor module is required.

3. We Provide a Remanufactured Replacement

We'll match your original module with an appropriate remanufactured replacement from our inventory.

4. Original Data Is Transferred

The applicable vehicle-specific data from your original BCM is transferred to the replacement module.

5. Tested & Verified

The completed replacement is bench checked and verified before leaving our facility.

6. We Ship It Back

Your completed remanufactured BCM is shipped back to you for installation.

Fast 1–2 Business Day Turnaround

We understand that a failed BCM can leave your Audi sitting instead of being driven.

That's why Lacorte Automotive pushes for a typical 1–2 business day turnaround after receiving your original module, subject to module condition and replacement availability.

Our goal is to get your Audi back on the road as quickly as possible.

3-Year Warranty Included

Your remanufactured replacement BCM is backed by a 3-Year Warranty covering defects in the supplied remanufactured unit and our workmanship, subject to our applicable warranty terms.

We stand behind the modules we supply and the work we perform.

What's Included

• Compatible remanufactured replacement BCM
• Transfer of applicable original vehicle data
• Professional bench service
• Testing and verification
• 3-Year Warranty
• Typical 1–2 business day turnaround after receipt

You Send Us:

Your original BCM

We Send You:

A remanufactured, cloned and tested replacement BCM

Proof of Ownership Required

Because these modules may contain vehicle security/start-authorization information, proof of vehicle ownership is required before service is performed.

Please provide:

• Government-issued photo ID
• Vehicle title or current registration
• VIN

Documentation must correspond with the vehicle being serviced.

Important — Please Read Before Ordering

This is a mail-in remanufactured replacement service.

Compatibility depends on the original module, processor, part number, hardware/software configuration, and vehicle application.

If your original module is severely damaged or its required data cannot be recovered, additional work or vehicle-side programming may be necessary. We will contact you if we determine that the standard service cannot be completed.

If you're unsure about compatibility, send us a picture of your original BCM label and your VIN before ordering.

Lacorte Automotive
Professional Automotive Electronics • Fast Turnaround • Quality Remanufactured Modules

Audi A4 / A5 / Q5 BCM Remanufactured Replacement

D70F3380 & D70F3634

You Send Your Original • We Provide the Replacement • 3-Year Warranty • Typical 1–2 Business Day Turnaround