Skip to main content
English €
Wishlist
Cart

Your cart is empty

A6421502877 0281013977 VIRGIN ECU ENGINE CONTROLLER MERCEDES 3.0 CR4.12

MAGNETI MARELLI

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.

Go to full description
Fast delivery of ECU engine unit – within 1–2 working days
Ask about the product
English €
with VAT without VAT
Price €329.54

Shipping costs are not included in the price.

Shipping from €42.37 - UPS express delivery around world (Afghanistan)

express delivery 3-6 days
pcs
Availability:
available

Product code: D4A1-9530A_20250925125519

info

Information

CAR MODEL MERCEDES SPRINTER VIANO VITO
ENGINE 3.0 CDI
OEM: A6421502877
PART NUMBER BOSCH 0281013977 CR4.12
VARIANT CLEAR - ready for programming
WARRANTY 6 MONTH
TESTED Second hand product
PAYMENT: Credit Card , Bank Transfer , PayPal
DELIVERY European Union 2-3 working days
DELIVERY Worldwide 4-7 working days

description

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.

Reviews

Number of ratings: 0
Rate and review

Blog:
enter

  • Basic Information 09-11-2025

    Official launch of the EcuSale fanpage – ECU guides, engine control unit repairs, offers and discount codes

    New EcuSale Fanpage – tips, repairs, diagnostics and promotions in one place


    Here you will learn what type of content we publish on our EcuSale fanpage: detailed technical guides, programming tips, explanations of the differences between VIRGIN / CLEAR / Plug&Play versions, rules for ECU cloning, as well as real examples of failures encountered in workshops. It is practical knowledge based on everyday work with automotive electronics.

    You will also find current promotions, discount codes and special offers available exclusively to followers. If you want to stay updated on new ECUs, programming services and price deals – this article is the perfect place to start.

    Read more
  • Repaire 19-10-2025

    AdBlue System in Cars – Operation, Failures, and Effective Repair Methods

    The AdBlue System in Modern Vehicles

    The AdBlue system has become a standard feature in modern diesel vehicles – from passenger cars and vans to trucks, buses, and agricultural machinery. Its main purpose is to reduce harmful exhaust emissions so that vehicles comply with Euro 5 and Euro 6 standards.

    In this article, we explain how the SCR system works, the role of the AdBlue pump and the engine control unit (ECU), and why regular maintenance of the system is so important. We describe the most common failures – from pump and NOx sensor malfunctions, through ECU software errors, to situations where disabling AdBlue in the ECU may be necessary in order to reach a workshop and carry out repairs.

    We also advise when it is worth repairing the controller and when a replacement Plug&Play module may be the better solution. If you want to know where to buy an AdBlue pump, how to recognize the symptoms of a failure, and how to avoid costly repairs – this guide will answer all your questions.

    Read more
    Płatności Shoper