Mercedes Benz C-Class W204 E-Class W212 C207 SLK R172 M271 860 CGI Engine Control Unit ECU A 271 150 03 91 - Used Original Parts
RM 1,500
Condition: Used (Original)At a Glance
- Mercedes Benz C-Class W204 E-Class W212 C207 SLK R172 M271 860 CGI Engine Control Unit ECU A 271 150 03 91 - Used Original Parts
- Part number: A2711500391 / A0034468840
- Fits: Mercedes Benz W204 C-Class, Mercedes Benz W212 E-Class, Mercedes Benz R172 SLC-Class · confirm by chassis number before ordering
- Used Original · tested working
- RM 1,500 · final quote via WhatsApp
- M.S. Motor · Kuala Lumpur, Malaysia · ready stock
Diagnosis and Common Symptoms
The M271.860 CGI engine utilizes a sophisticated Siemens/Continental SIM271DE management system that is susceptible to specific failure modes. A primary cause of failure for the A 271 150 03 91 unit is oil capillary action, where oil from leaking camshaft adjusters travels through the wiring harness and enters the ECU connector, causing internal shorts. Common fault codes include P0606 (ECM/PCM Processor Fault), P0607 (Control Module Performance), and various communication errors via CAN bus (U-codes). Physical symptoms manifest as a "No Start" condition, the radiator fan running at maximum speed immediately upon ignition, or the vehicle entering a permanent Limp Home Mode with "ESP Inoperative" displayed on the instrument cluster. If your vehicle fails to communicate with a diagnostic scanner or shows intermittent ignition circuit faults, the ECU hardware is the likely culprit.
Introduction
At M.S. Motor, we specialize in the high-level electronics that govern German engineering, ensuring every component meets factory operating parameters. This Engine Control Unit is a Genuine Mercedes-Benz part, salvaged from a running donor vehicle and subjected to a comprehensive diagnostic health check to confirm processor stability. By opting for a Genuine used unit, you are ensuring that the internal architecture and thermal resistance match the exact requirements of the M271 turbocharged engine. Each unit is inspected for pin corrosion and oil intrusion to guarantee a reliable foundation for your vehicle's management system.
Product Details
- Brand: Mercedes-Benz
- Model Compatibility: W204 C200/C250, W212 E200/E250, C207 E-Class Coupe, R172 SLK200/SLK250
- Part Name: Engine Control Unit (ECU / DME)
- Part Number: A 271 150 03 91
- Engine Type: M271.860 (Turbocharged CGI)
- Condition: Genuine Used (Tested Working)
- Notes: Unit is sold as a "locked" donor. It requires professional synchronization or cloning to your vehicle’s Immobilizer (EIS/EZS) and keys.
Frequently Asked Questions
What symptoms indicate failure?
Common indicators include a crank-no-start condition, "Display Fault" messages on the dashboard, the cooling fan running at full speed without the engine being hot, and internal processor fault codes that cannot be cleared.
Does this require coding?
Yes. As this is a security-related component (Drive Authorization System), it cannot be "plug-and-play." You must have a qualified technician clone your original ECU data onto this unit or perform a "renew" and "personalize" procedure using specialized Mercedes-Benz diagnostic software.
Is this original?
Yes, this is a Genuine Mercedes-Benz factory-installed component. We do not stock aftermarket or third-party engine management hardware.
Part price does not include installation. Our workshop can install for you, labour is charged separately and confirmed with you before any work starts.
We cannot diagnose your car over WhatsApp or photos. Not sure this part will solve your problem? Come for a workshop check, diagnosis fee RM180. If you proceed with the repair using our parts, the RM180 is offset into the labour charge. If you decide not to repair, only the RM180 applies.
All parts are tested and guaranteed to work. Whether a part solves your car's problem can only be confirmed by diagnosis.
Shipping: from Kuala Lumpur, West Malaysia ~RM50, East Malaysia ~RM80 (estimate, confirm via WhatsApp). Delivery 1-2 working days in secure anti-static packaging.
Warranty: 30-day exchange for control units, engines, gearboxes and other major parts; 14 days for small parts. Claims require proof of installation by a qualified workshop. No warranty for items opened, modified, or damaged by wrong installation.
Prices vary with stock and part condition. Final price via WhatsApp.
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