MAZDA · SH725X ECU

MAZDA 2 SH725X tuning files

Here is what the catalog holds for the MAZDA 2 on the SH725X. The matched variants sit between 105 and 120 HP from the factory. 13 distinct variants are catalogued here. We start conservative here — Stage 1 and Stage 2 are the dependable baseline. Your file is built against the exact ECU software on the car, then operator-verified.

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Available solutions

What we can run on the SH725X for this vehicle — the precise options narrow down by engine and software version.

Stage 1 Stage 2

Engine variants & ECU software

13 distinct variants for the MAZDA 2 on the SH725X ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 1500 120HP
Controller brand: DENSO
ECU: SH725X
Stock power: 120 HP
ECU SW: S51C-18881-
SW upgrade: S51C-188K2-T
Calibration: S51C-18881-_S51C-188K2-T

Variant 2

ECU

Catalog engine: 1500 120HP
Controller brand: DENSO
ECU: SH725X
Stock power: 120 HP
ECU SW: S51X-18881-D
SW upgrade: S51X-188K2-D
Calibration: S51X-18881-D_S51X-188K2-D

Variant 3

ECU

Catalog engine: 1500 116HP
Controller brand: DENSO
ECU: SH725X
Stock power: 116 HP
ECU SW: P55W-18881-
SW upgrade: P5CS-188K2-C
Calibration: P55W-18881-_P5CS-188K2-C

Variant 4

ECU

Catalog engine: 1500 116HP
Controller brand: DENSO
ECU: SH725X
Stock power: 116 HP
ECU SW: P5DL-18881-E
SW upgrade: P5DL-188K2-E
Calibration: P5DL-18881-E_P5DL-188K2-E

Variant 5

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S51K-18881-H
SW upgrade: S51K-188K2-H
Calibration: S51K-18881-H_S51K-188K2-H

Variant 6

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S57K-18881-B
SW upgrade: S57K-188K2-B
Calibration: S57K-18881-B_S57K-188K2-B

Variant 7

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S55W-18881-B
SW upgrade: S55W-188K2-B
Calibration: S55W-18881-B_S55W-188K2-B

Variant 8

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S51C-18881-P
SW upgrade: S51C-188K2-P
Calibration: S51C-18881-P_S51C-188K2-P

Variant 9

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S55W-18881-C
SW upgrade: S55W-188K2-C
Calibration: S55W-18881-C_S55W-188K2-C

Variant 10

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S51K-18881-F
SW upgrade: S51K-188K2-F
Calibration: S51K-18881-F_S51K-188K2-F

Variant 11

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S58K-18881-
SW upgrade: S58K-188K2-
Calibration: S58K-18881-_S58K-188K2-

Variant 12

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S553-18881-
SW upgrade: S51F-188K2-D
Calibration: S553-18881-_S51F-188K2-D

Variant 13

ECU

Catalog engine: 1500 105HP
Generation: 2014-2017
Matched gains engine: 1.5 Skyactiv-D 105
Controller brand: DENSO
ECU: SH725X
Stock power: 105 HP
Stage 1 power: 130 HP
Power increase: +25 HP (+24%)
Stock torque: 220 Nm
Stage 1 torque: 260 Nm
Torque increase: +40 Nm (+18%)
ECU SW: S57M-18881-A
SW upgrade: S57M-188K2-A
Calibration: S57M-18881-A_S57M-188K2-A

Related vehicles

Other vehicles built on the SH725X controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the MAZDA 2 on the SH725X?

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

Do you cover the SH725X ECU software on this model?

Yes — the MAZDA 2 on the SH725X 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.