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A2661531491 Mercedes A Class A0034466040 ECU Engine Control Unit 5WK90990
- $175.00
- $175.00
- Unit price
- per
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Specifications
Item condition
Pre-owned
Type
Engine Control Unit (ECU)
Brand
Continental
Model
A-Class (W169, W176, etc.) 1.5 L / 1.7 L petrol
Product Name
A2661531491 / A0034466040 / 5WK90990 ECU Mercedes A-Class Engine Control Unit
Manufacturer Part Number
A2661531491, A0034466040, 5WK90990
OE/OEM Part Number
A2661531491, A0034466040, 5WK90990
Country of Manufacture
Germany
Manufacturer Warranty
30 Days
Reg. Year/Mont
2009 – 2012
Programming Required
true
A2661531491 / A0034466040 / 5WK90990 ECU Mercedes A-Class Engine Control Unit. Product DescriptionThe Engine Control Unit (ECU) with OEM...
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A2661531491 / A0034466040 / 5WK90990 ECU Mercedes A-Class Engine Control Unit.
Product Description
The Engine Control Unit (ECU) with OEM part numbers A2661531491, A0034466040, and 5WK90990 is a genuine Mercedes module used in various A-Class models. This ECU (also known under the SIM266 hardware architecture) governs essential engine functions such as fuel injection, ignition timing, throttle control, diagnostics, and emission regulation. When properly programmed with your vehicle’s VIN and immobilizer data, it delivers optimal engine performance and system integration.
This unit is typically offered in used, refurbished, or remanufactured condition. Before installation, confirm pinout, software version, and immobilizer compatibility. A skilled technician should handle reprogramming or cloning to ensure correct integration with your car’s systems.
Common failure symptoms include intermittent stalling, no-start conditions, error codes like P0605 or P0606, or loss of ECU communication. Many rebuilders offer variant or clone services to rematch your ECU.
Compatibility Table
| Vehicle Make | Model / Platform | Engine / Variant | Production Years | ECU Part Numbers / Comments |
|---|---|---|---|---|
| Mercedes-Benz | A-Class (W169, W176, etc.) | 1.5 L / 1.7 L petrol (SIM266 variants) | ~2009 – 2012 (and adjacent years) | A2661531491 / A0034466040 / 5WK90990 |
| Mercedes-Benz | Other small / compact models using SIM266 ECU hardware | (varies) | — | Cross reference may exist for models sharing SIM266 architecture |
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