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Product safety

Manufacturer

Marelli Europe S.p.A.

Viale Aldo Borletti 61/63

20011 Corbetta (MI), Italy

+39 02 97227111 customercare@marelli.com

Responsible person in the EU

AUTO-ELEKTRONIKA DAMIAN SOSNOWSKI

Lelowska 20

42-235 Biała Wielka, Poland

+48888638546 sale@ecusale.com Report a product safety issue

Importer

AUTO-ELEKTRONIKA DAMIAN SOSNOWSKI

20 Lelowska

42-235 Biała Wielka, Poland

+48888638546 sale@ecusale.com

A6421502877 0281013977 VIRGIN ECU ENGINE CONTROLLER MERCEDES 3.0 CR4.12

Manufacturer: MAGNETI MARELLI (go to products)
English €
with VAT without VAT
Price €324.34

Shipping costs are not included in the price.

Availability:
available
Shipping from €41.70 - UPS express delivery around world (Afghanistan)

express delivery 3-6 days
Shipping time: 48 hours

A6421502877 / 0281013977 – Virgin Engine ECU Mercedes 3.0 CR4.12

Engine control unit (ECU) in Virgin (reset) mode, prepared for quick adaptation in Mercedes 3.0 CR4.12 vehicles. Part numbers: A6421502877, 0281013977.

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🚚 UPS Shipping Across Europe

Delivery within the European Union typically takes 1–3 business days.

🌍 Worldwide UPS Shipping

Worldwide delivery usually takes 4–7 business days.

Technical specifications

  • Vehicle Make and Model MERCEDES SPRINTER VIANO VITO
  • Engine type 3.0 CDI
  • OEM Part Number A6421502877
  • Manufacturer Part Number BOSCH 0281013977 CR4.12
  • Module Version CLEAR - ready for programming
  • Condition Second hand product
  • Warranty 6 MONTH
  • Payment Methods Credit Card , Bank Transfer , PayPal
  • Express Delivery within the EU European Union 2-3 working days
  • International Delivery Outside the EU Worldwide 4-7 working days

A6421502877 / 0281013977 – Virgin Engine ECU Mercedes 3.0 CR4.12

The engine ECU A6421502877 / 0281013977 is an original unit used in Mercedes vehicles with the 3.0 CDI engine. It has been prepared in Virgin (reset) mode, which means it can be quickly and easily programmed after installation using the PIN code and OEM diagnostic tools.

Application and Compatibility

This ECU fits the following models:

  • Mercedes E-Class W211 / W212 – 3.0 CDI (2006–2011)
  • Mercedes ML W164 – 3.0 CDI (2006–2011)
  • Mercedes GL X164 – 3.0 CDI (2006–2012)
  • Mercedes S-Class W221 – 3.0 CDI (2006–2013)
  • Mercedes CLS W219 – 3.0 CDI (2006–2010)
  • Mercedes R-Class W251 – 3.0 CDI (2006–2012)

Engine type: OM642 3.0 CDI CR4.12

Virgin Mode Programming

A Virgin ECU contains no stored immobilizer data, allowing adaptation without cloning the old unit. After installation:

  1. Connect the ECU to the wiring harness.
  2. Enter the PIN code using the OEM diagnostic tool (e.g. Mercedes Star Diagnosis).
  3. Perform the ECU adaptation procedure.

The entire process takes just a few minutes and ensures full integration with the vehicle’s immobilizer and electronics.

Main Features

  • Part numbers: A6421502877, 0281013977
  • Version: Virgin (reset) – ready for adaptation
  • Compatible with Mercedes models using the OM642 3.0 CDI engine
  • No cloning required
  • Full integration after adaptation procedure

Q&A – Frequently Asked Questions

Q: Does ECU A6421502877 / 0281013977 fit my car?
A: Yes, if you have a Mercedes 3.0 CDI OM642 engine in E, ML, GL, S, CLS or R models from 2006–2013, this ECU is compatible. Always compare part numbers with your original unit.

Q: Do I need to clone the old ECU?
A: No. The Virgin version requires no cloning – just adaptation using the PIN code and OEM diagnostic tools.

Q: How long does adaptation take?
A: The adaptation procedure with Mercedes Star Diagnosis usually takes only a few minutes, after which the car can start normally.

Q: Is this ECU Plug & Play?
A: It requires Virgin adaptation. Once the procedure is complete, the ECU becomes fully compatible with your vehicle.

Q: What are the alternative part numbers?
A: The most common numbers are A6421502877 and 0281013977. If either appears on your old ECU, this part will fit.

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        FAQ – Frequently Asked Questions

        1. Are the products tested before shipping?

        Yes, every ECU engine controller, BSI module, BCM module, ABS module, transmission control unit, and other automotive electronic module is electronically tested before shipment. Each unit is checked for proper communication and correct operation to ensure you receive a fully tested product ready for installation.

        2. Does the ECU engine controller require programming or coding after installation?

        Whether programming or coding is required depends on the version of the product. We offer VIRGIN, IMMO OFF, and Plug & Play ECU engine controllers. Information about any required programming or coding is always clearly stated in the product description. In many cases, the unit can be installed and used without any additional coding or adaptation.

        3. How do I choose the correct part for my vehicle?

        The most important step is to compare the part numbers found on your original unit. Pay special attention to the Bosch, Siemens, Magneti Marelli, Continental, or vehicle manufacturer's OEM part number. If you are unsure, simply send us a photo of your existing module or provide your vehicle's VIN, and our specialists will help you identify the correct part.

        4. Are the products covered by a warranty?

        Yes, all ECU engine controllers, ABS modules, BCM modules, BSI modules, transmission control units, and other automotive electronic modules offered in our store are covered by a warranty. Every product is carefully tested and prepared before shipment. If you experience any issues, our technical support team is available to assist with diagnostics and help resolve the problem quickly and efficiently.

        5. What payment methods are available in the store?

        We offer secure online payments processed through Stripe and PayPal. Customers can pay using a credit or debit card, Apple Pay, Google Pay, Klarna, online banking payments, or a traditional bank transfer. After placing an order, you will receive a secure payment link to complete your purchase safely and conveniently.

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