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
Alieu Jallow (verified owner) –
“Euro clear headlights for my E36. Glass lenses and chrome delete. Huge improvement over US spec.”
Grace Adebayo (verified owner) –
“N62 with valve stem seals already fixed. No smoke on startup. Saved me $3k in labor. Best decision ever.”
Elena Kovacic (verified owner) –
“Euro clear headlights for my E36. Glass lenses and chrome delete. Huge improvement over US spec.”
Tomas Ribeiro (verified owner) –
“Euro smiley headlights for my E30. Glass lenses were flawless. H1 conversion works great. Huge upgrade.”
Aliou Diallo (verified owner) –
“Black line headlights for my F22 M235i. Aggressive and unique. Light output is excellent.”
Samba Bah (verified owner) –
Purchased BMW wheels and the finish is flawless. Balanced perfectly with no vibration at speed. Shipping protection was excellent. Very happy with this purchase overall.
Leila Mansouri (verified owner) –
“Blacked out headlights for my E82 135i. Aggressive look. Light output is still great. Highly recommend.”
Aleksandra Kaczmarek (verified owner) –
“M21 diesel from amgcarpartsforsale powered my E28 across Europe. Reliable and torquey. Great price too.”
Paulo Correia (verified owner) –
“Widebody fenders for my E30 are aggressive but fitment was spot on. Fiberglass quality is top notch. Will buy again.”
Victor Hugo Pereira (verified owner) –
“Carbon fiber fenders for my F82 M4 are lightweight and fit like a glove. Shipping was fast and well packed. Love the look.”
Omar Benali (verified owner) –
BMW wheels arrived well protected and clean. Perfect offset and sizing for my model. Driving feels smoother now. Excellent value purchase overall.
Moussa Gueye (verified owner) –
“Bumper package for E53 X5 facelift. Front and rear. Grilles and fog lights included. Huge improvement.”