Your Vehicle
BMW Z1 2.5i 170hp
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Stage 1: file 100 € online + installation 700 € at the workshop (on the bench) Book now
Power HP
Torque Nm
Buy the Stage 1 file, pay the installation at the workshop
100 € VAT included: the file developed for your engine, paid online
Installation: 700 € network price, the workshop may charge less, paid at the chosen workshop (on the bench) · terms
Power Graph
BMW Z1 2.5i 170hp: da 170 a 185HP
Remapping BMW Z1
MasterTuning develops remapping for BMW. La BMW Z1 2.5i 170hp può passare da 170 HP a 185 HP con un incremento di 15 HP.
The development of each remap is customized by MasterTuning.
- 100% customised files with lifetime warranty
- Reference values for Stage 1: the file is developed on your vehicle and checked in the workshop
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details BMW Z1 2.5i 170hp
The BMW Z1 2.5i 170hp is equipped with a petrol engine that produces 170 HP and 222 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this BMW can achieve 185 HP (+9%) and 240 Nm (+8%).
Our Stage 1 tuning for the Z1 All delivers an impressive gain of +15 HP and +18 Nm, optimizing the petrol engine's performance while maintaining reliability and staying within safe parameters.
The engine code 256K1 identifies this specific powerplant configuration. The Siemens/Continental MS42 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
The Z1's petrol engine benefits significantly from professional ECU calibration. The result is a more responsive, enjoyable driving experience with improved power delivery throughout the rev range.
Technical Specifications — BMW Z1 2.5i 170hp
Factory technical data for the BMW Z1 2.5i 170hp (All), used by MasterTuning engineers to develop a remap tailored to this specific powerplant. Figures shown are reference values for Stage 1; the file is developed on your vehicle and checked in the workshop.
| Engine code | 256K1 |
|---|---|
| ECU / Control unit | Siemens/Continental MS42 |
| Fuel | Petrol |
| Compression ratio | 8.8 |
| Bore × stroke | 84.0 X 75.0 mm |
| Stock power | 170 HP · 222 Nm |
| Remapped power (Stage 1) | 185 HP (+15) · 240 Nm (+18) |
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your BMW Z1.
Frequently Asked Questions - BMW Z1
How much power can I gain from remapping my BMW Z1?
With MasterTuning Stage 1, your BMW Z1 2.5i 170hp can gain +15 HP (from 170 to 185 HP) and +18 Nm of torque. This represents a 9% increase in power.
Which ECU does the BMW Z1 2.5i 170hp use?
The BMW Z1 2.5i 170hp uses the Siemens/Continental MS42 engine control unit. MasterTuning recalibrates this ECU for Stage 1 and Stage 2.
What is the engine code of the BMW Z1 2.5i 170hp?
The engine code of the BMW Z1 2.5i 170hp is 256K1. You can find it in the vehicle documents or on the engine plate.
Is ECU remapping safe for the BMW Z1 engine?
Yes, MasterTuning's remapping for the BMW Z1 2.5i 170hp is developed within safe parameters. Each file is developed on your vehicle, checked in the workshop and stays within the mechanical limits of the 256K1 engine.
Is the BMW ECU remapping reversible?
Absolutely. The original factory calibration of your BMW Z1 is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my BMW warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
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Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
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