Original BMW E36 M3 S50B30 ECU (DME) with EWS – Part No. 1404735
Genuine BMW Spare Part — Complete Engine Management Unit for E36 M3 3.0L
This listing is for an original BMW Engine Control Unit (ECU/DME) removed from a BMW E36 M3 equipped with the S50B30 3.0L engine. The unit includes EWS compatibility and carries the BMW part number 1404735. Ideal for restoring factory engine management or replacing a faulty ECU on European-spec E36 M3 models.
The ECU is fully OEM, free from aftermarket tuning, and presents in used but working condition. No internal repairs or modifications are noted. Housing, connectors, and pin terminals remain clean and intact.
Specifications
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Part Type: Engine Control Unit (ECU / DME)
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Manufacturer: BMW
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OEM Part Number: 1404735
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Engine Compatibility: S50B30 (Euro-spec 3.0L M3)
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EWS: Equipped / Compatible
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Condition: Used – tested and functional
Fitment
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BMW E36 M3 (Euro-spec 3.0L S50B30)
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May fit other S50B30 applications requiring matching EWS pairing (module, key chip, & ring antenna may be needed depending on vehicle setup)
Features
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Genuine factory BMW control unit
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Supports original S50B30 engine mapping
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Direct plug-and-play replacement when paired with matching EWS components
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Ideal for restorations, drivetrain swaps, or OEM-correct repairs
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