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L34M18881A / E6T56575H Mazda 3 BK SP23 Engine ECU 2003–2009 Genuine OEM Engine Control Unit.
This listing is for a Genuine Mazda 3 BK SP23 Engine Control Unit (ECU), suitable for model years 2003 to 2009.
Part number L34M-18-881A with manufacturer reference E6T56575H is the correct ECU used in select Mazda 3 BK and SP23 models during this production range.
The ECU manages essential engine operations such as fuel injection, ignition timing, air–fuel ratio, idle control, and emissions regulation.
This OEM unit has been tested and confirmed fully functional, making it an ideal replacement for vehicles experiencing rough idle, no-start conditions, check-engine light, misfires, or poor performance caused by a faulty ECU.
Mazda: L34M-18-881A
Manufacturer: E6T56575H
Matching the part number with your existing ECU is required for correct fitment.
| Make | Model | Variant | Chassis | Year Range | Notes |
|---|---|---|---|---|---|
| Mazda | Mazda 3 | SP23 | BK | 2003–2009 | Direct fit when part numbers match |
| Mazda | Mazda 3 | 2.0 / 2.3 Petrol (market dependent) | BK | 2003–2009 | May require immobilizer pairing |
Compatibility is strictly based on part number.
Genuine OEM Mazda ECU
Compatible with Mazda 3 BK / SP23 models
Fully tested and in perfect working condition
Restores proper engine performance and fuel efficiency
Direct replacement for L34M-18-881A / E6T56575H
Professional programming or key coding may be required
Mazda 3 BK ECU L34M-18-881A
Mazda SP23 engine control unit
E6T56575H Mazda 3 ECU
Mazda 3 2003 2004 2005 2006 2007 2008 2009 ECU
Mazda BK engine computer OEM
Mazda ECM ECU replacement
Mazda 3 BK SP23 engine control module
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