2008 Mercedes-Benz S550 Engine Control Unit (ECU) Used OEM A2731532979

Headline & Summary

Restore the core intelligence of your vehicle’s powertrain with this genuine OEM Engine Control Unit (ECU/DME). Sourced from a 2008 Mercedes-Benz S550 (W221), this Bosch-manufactured module is the primary computer responsible for managing fuel injection, ignition timing, and emissions systems for the 5.5L V8 M273 engine. Using a genuine factory ECU ensures your vehicle maintains its original performance mapping and sophisticated diagnostic capabilities that generic or non-OE modules cannot replicate.

Key Details & Specifications

• Part Name: Engine Control Unit (ECU) / Motor Electronics (ME)

• Part Number (MPN): A2731532979 (Interchangeable with 273-153-29-79)

• Brand: Mercedes-Benz (Genuine Bosch OEM)

• Condition: Used, fully inspected. The unit's casing is intact with no signs of heat damage or moisture intrusion. Pins are straight and clean.

• Compatibility: 2007–2011 Mercedes-Benz S550 (W221), CL550 (W216), and other models equipped with the M273 5.5L V8 engine.

• Country of Manufacture: Germany

• Notes: This is a programmable electronic module. Because Mercedes-Benz uses a "Drive Authorization System" (DAS), this ECU will require professional programming/cloning or "marrying" to your vehicle’s VIN and immobilizer system by a qualified technician with the appropriate diagnostic tools (Xentry/DAS).

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[⚠️ Fitment Note: Please verify compatibility with your vehicle’s VIN (WDDNG71XX8A154474) before purchase.]

Always buy OEM! OEM parts are built to factory specifications, ensuring the right fit, performance, and safety compared to aftermarket alternatives. We sell parts pulled from vehicles. They are 100% compatible with original OEM part numbers. In case you are looking to substitute a part, please check with your car’s part number and catalog.