Experiencing DME failure on your BMW N54 equipped with an MSD80?

Lacorte Automotive offers a complete mail-in MSD80 to MSD81 remanufactured DME replacement service. You send us your original MSD80 DME, original CAS module, and one working vehicle key. We provide a compatible remanufactured MSD81, perform the applicable vehicle-specific data transfer, bench test the completed replacement, and ship everything back to you.

YOU SEND YOUR MSD80 + CAS + KEY — WE PROVIDE THE MSD81

No donor DME required.

Every remanufactured MSD81 supplied with this service is backed by our 3-Year Warranty.

Why Replace an MSD80 With an MSD81?

If your original MSD80 has failed, you don't need to search for, purchase, or attempt to match your own replacement DME.

With this service, Lacorte Automotive supplies the remanufactured MSD81 for you.

We use your original MSD80, CAS, and key to perform the applicable vehicle-specific data transfer and prepare the replacement for your vehicle. The completed MSD81 is then bench tested and verified before being returned.

This gives you a complete mail-in replacement solution while retaining the applicable original vehicle configuration.

Common MSD80 / DME Failure Symptoms

A failing MSD80 or DME can potentially cause symptoms including:

• Crank but no start
• Intermittent no-start
• Engine unexpectedly stalling
• Rough running
• Engine misfires
• Injector-related faults
• Injector control problems
• Multiple cylinder faults
• DME communication faults
• No communication with the DME
• Diagnostic equipment unable to access the DME
• DME intermittently dropping offline
• Internal DME faults
• Power supply or control-related faults
• Reduced-power / limp mode
• Multiple engine-management fault codes
• Water or moisture damage
• Internal electronic failure

Proper diagnosis is strongly recommended before ordering. Injectors, ignition coils, wiring, grounds, power supplies, sensors, fuel-system problems, battery voltage, and other components can produce similar symptoms.

Applicable BMW N54 Vehicles

MSD80 and MSD81 DMEs are used in various BMW N54 applications, potentially including:

• BMW 135i — E82 / E88
• BMW 335i — E90 / E91 / E92 / E93
• BMW 335is — E92 / E93
• BMW 535i — E60 / E61
• BMW X6 xDrive35i — E71
• BMW Z4 sDrive35i — E89
• BMW Z4 sDrive35is — E89
• Additional compatible N54 applications

Exact compatibility depends on the original DME part number, hardware/software version, vehicle production date, and vehicle configuration.

If you're unsure whether your vehicle qualifies, send us a clear photo of your original MSD80 label and your VIN before ordering.

What You MUST Send Us

For this service, please mail us:

• Your original MSD80 DME
• Your original CAS module
• One working vehicle key
• Vehicle VIN
• Required proof of ownership

IMPORTANT

The original MSD80, CAS, and working key are required for this mail-in service.

Please DO NOT send only your DME.

You do not need to purchase or supply an MSD81 donor module. We provide the remanufactured MSD81.

How It Works

1. Purchase the Service

Place your order through our website.

2. Mail Us Your MSD80 + CAS + Key

Securely ship us:

Original MSD80 DME + Original CAS Module + One Working Key

Please package all components carefully to prevent shipping damage.

3. We Provide the Remanufactured MSD81

We select an appropriate remanufactured MSD81 DME for your supported application.

There is no need for you to source a replacement DME yourself.

4. We Transfer the Applicable Vehicle Data

We use your supplied components to perform the applicable vehicle-specific data transfer and prepare the replacement MSD81 for your vehicle.

5. Tested & Verified

The completed MSD81 is professionally bench tested and verified before leaving our facility.

6. We Ship Everything Back

Your completed remanufactured MSD81, CAS, key, and applicable original components are securely packaged and shipped back to you.

Typical 1–2 Business Day Turnaround

A failed DME can leave an N54 BMW completely unusable, so we understand the importance of getting your vehicle back on the road quickly.

That's why Lacorte Automotive pushes for a typical 1–2 business day turnaround after receiving your MSD80, CAS, and key, subject to the condition of the original components and replacement availability.

3-Year Warranty Included

Every remanufactured MSD81 supplied through this service includes our 3-Year Warranty against defects in the supplied remanufactured DME and our workmanship, subject to applicable warranty terms.

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

What's Included

• Compatible remanufactured MSD81 DME
• MSD80 → MSD81 replacement service
• Applicable original vehicle data transfer
• Applicable configuration transfer
• Professional bench service
• Testing & verification
• 3-Year Warranty
• Typical 1–2 business day turnaround after receipt

Simple Breakdown

YOU SEND:

Original MSD80 DME
Original CAS Module
One Working Vehicle Key

WE PROVIDE:

Compatible Remanufactured MSD81 DME

YOU RECEIVE:

A professionally prepared and tested MSD81 replacement backed by our 3-Year Warranty, along with your CAS, key, and applicable original components.

Proof of Ownership Required

Proof of vehicle ownership is required before this service is performed.

Please provide:

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

Documentation must correspond with the vehicle being serviced.

Important — Compatibility

This service is specifically intended for supported BMW N54 vehicles originally equipped with an MSD80 DME being replaced with an MSD81.

Compatibility depends on factors including:

• Original MSD80 part number
• DME hardware version
• DME software version
• Vehicle production date
• Vehicle configuration
• Condition of the original MSD80
• Condition of the CAS and key

Severe physical, electrical, water, or internal memory damage to the original components may prevent the standard service from being completed.

Not Sure If Your BMW Is Compatible?

Before ordering, send us:

• Clear photo of your original MSD80 label
• Vehicle year
• Vehicle model
• VIN

We'll help verify compatibility before you ship your components.

Lacorte Automotive

BMW N54 MSD80 → MSD81 Remanufactured DME Replacement

YOU SEND: MSD80 + CAS + KEY

WE PROVIDE: REMANUFACTURED MSD81

Data Transfer • Tested & Verified • 3-Year Warranty • Typical 1–2 Business Day Turnaround