MAZDA · RF8B ECU

MAZDA 3 RF8B tuning files

Here is what the catalog holds for the MAZDA 3 on the RF8B. The matched variants sit between 140 and 143 HP from the factory. 5 distinct variants are catalogued here. Stage 1 and Stage 2 are the safe starting points for this platform. Your file is built against the exact ECU software on the car, then operator-verified.

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Available solutions

Applicable work for the RF8B on this vehicle. The available set firms up once the exact engine and software are known.

Stage 1 Stage 2

Engine variants & ECU software

5 distinct variants for the MAZDA 3 on the RF8B ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 2000 143HP
Generation: 2003-05/2009
Matched gains engine: 2.0 MZR-CD 143
Controller brand: DENSO
ECU: RF8B
Stock power: 143 HP
Stage 1 power: 170 HP
Power increase: +27 HP (+19%)
Stock torque: 360 Nm
Stage 1 torque: 410 Nm
Torque increase: +50 Nm (+14%)

Variant 2

ECU

Catalog engine: 2000 143HP
Generation: 2003-05/2009
Matched gains engine: 2.0 MZR-CD 143
Controller brand: DENSO
ECU: RF8B
Stock power: 143 HP
Stage 1 power: 170 HP
Power increase: +27 HP (+19%)
Stock torque: 360 Nm
Stage 1 torque: 410 Nm
Torque increase: +50 Nm (+14%)
ECU HW: GE00R2AJT30B

Variant 3

ECU

Catalog engine: 2000 143HP
Generation: 2003-05/2009
Matched gains engine: 2.0 MZR-CD 143
Controller brand: DENSO
ECU: RF8B
Stock power: 143 HP
Stage 1 power: 170 HP
Power increase: +27 HP (+19%)
Stock torque: 360 Nm
Stage 1 torque: 410 Nm
Torque increase: +50 Nm (+14%)
ECU HW: GB0DRF8BT1DA

Variant 4

ECU

Catalog engine: 2000 143HP
Generation: 2003-05/2009
Matched gains engine: 2.0 MZR-CD 143
Controller brand: DENSO
ECU: RF8B
Stock power: 143 HP
Stage 1 power: 170 HP
Power increase: +27 HP (+19%)
Stock torque: 360 Nm
Stage 1 torque: 410 Nm
Torque increase: +50 Nm (+14%)
ECU HW: GE04R2AJT34A

Variant 5

ECU

Catalog engine: 2000 140HP
Controller brand: DENSO
ECU: RF8B
Stock power: 140 HP
ECU SW: 18881H
ECU HW: GB0ARF8BT1AA

Related vehicles

Other vehicles built on the RF8B controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the MAZDA 3 on the RF8B?

Stage 1, Stage 2. The exact set depends on the specific engine and software version.

Do you cover the RF8B ECU software on this model?

Yes — the MAZDA 3 on the RF8B ECU is part of the catalog. Upload your original file and it is matched to the right calibration before any work is done.

How is the file delivered?

Through the TuningBay workflow with operator validation and one safe, sensible result per job. Files we deliver, we stand behind.