L34M18881A / E6T56575H Mazda 3 BK SP23 Engine ECU 2003–2009 Genuine OEM Engine Control Unit.

Product Description

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.

OEM Part Numbers

Mazda: L34M-18-881A
Manufacturer: E6T56575H

Matching the part number with your existing ECU is required for correct fitment.

Compatibility Table

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.

Key Features

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

Key features

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

Compatibility Table

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.

Shipping, returns and warranty

Worldwide shipping with tracking
30-day returns on unused, uninstalled parts
90-day limited warranty against defects

Send us your VIN and we confirm fitment before shipping. See our shipping policy and return policy.

Mazda 3 SP23 BK 2003–2009

E6T56575H Mazda 3 BK SP23 Engine ECU L34M18881A Genuine OEM Engine Control Unit