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BMW Z4 30i 258HP 3934

E85 - 2003 - 2008

258 Original HP
278 Modified HP
300 Original NM
320 Modified NM
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BMW Z4

BMW Z4 E85 - 2003 - 2008 30i 258HP 3934

Key Specifications

Generazione E85 - 2003 - 2008
Carburante Petrol
Codice motore 306S3
ECU Siemens/Continental MSD80 / Siemens/Continental MSV70
Rapporto compressione 10.7:1
Alesaggio x Corsa 85.0 X 88.0 mm
Power 258 → 278 hp +20 hp
Torque 300 → 320 Nm +20 Nm
Power
278 HP
+20 HP (+7.8%)
Original 258 HP
Stage 1 278 HP
Torque
320 NM
+20 NM (+6.7%)
Original 300 NM
Stage 1 320 NM

Power Graph

Original Power 258HP
Original Torque 300Nm
Power After Remap 278HP
Torque After Remap 320Nm

Discover Our Tuning Solutions

Frequently Asked Questions - BMW Z4

The cost of Stage 1 tuning for BMW Z4 30i 258HP 3934 varies depending on the ECU (Siemens/Continental MSD80 / Siemens/Continental MSV70) and specific requirements. Contact us for a free personalized quote.

Stage 1 tuning for BMW Z4 typically takes 1-2 hours of work. Time may vary depending on the ECU type.

Yes, our Stage 1 tunes are developed respecting the engine's safety margins. The power increase from 258 to 278 HP (+8%) is within safe parameters.

With Stage 1 tuning, BMW Z4 goes from 258 HP to 278 HP (+20 HP) and from 300 Nm to 320 Nm (+20 Nm).

Stage 1 remapping takes it from 258 HP to 278 HP (+20 HP, +8%) and torque from 300 Nm to 320 Nm (+20 Nm). These figures refer to the standard engine, with no hardware modifications.

A remap changes the factory calibration, so on a vehicle still under manufacturer warranty it may affect coverage on powertrain components. Performance tuning keeps all emission systems working; deactivating emission devices such as DPF, EGR or AdBlue is not road-legal in the EU and UK and is intended for off-road, motorsport or export use only.

With a normal driving style consumption usually stays the same or drops slightly: the extra torque at low rpm means less throttle for the same speed. Consumption goes up only if you actually use the additional power.

Yes. The original file is read and stored before any modification, so the vehicle can be returned to the factory calibration at any time.

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BMW
BMW Z4 30i 258HP 3934
+20 HP
278 HP