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BMW 5 serie 523i 170hp
Technical Specifications
Power hp
Torque Nm
Power Graph
BMW 5 serie 523i 170hp: da 170 a 187HP
Remapping BMW 5 serie
MasterTuning is a leader in developing remapping for BMW. La BMW 5 serie 523i 170hp può passare da 170 HP a 187 HP con un incremento di 17 HP.
The development of each remap is customized by MasterTuning.
- 100% tested and customized files guarantee
- Tested and developed on a 4x4 dyno
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details BMW 5 serie 523i 170hp
The BMW 5 serie 523i 170hp is equipped with a petrol engine that produces 170 HP and 245 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this BMW can achieve 187 HP (+10%) and 272 Nm (+11%).
Our Stage 1 tuning for the 5 serie E39 - 1995 - 2003 delivers an impressive gain of +17 HP and +27 Nm, optimizing the petrol engine's performance while maintaining reliability and staying within safe parameters.
The engine code 256S3 identifies this specific powerplant configuration. The Siemens/Continental MS43 / Siemens/Continental MS41 / Siemens/Continental MS42 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
The 5 serie'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 5 serie 523i 170hp
Factory technical data for the BMW 5 serie 523i 170hp (E39 - 1995 - 2003), used by MasterTuning engineers to develop a tailored, dyno-tested remap for this specific powerplant.
| Engine code | 256S3 |
|---|---|
| ECU / Control unit | Siemens/Continental MS43 / Siemens/Continental MS41 / Siemens/Continental MS42 |
| Fuel | Benzina |
| Compression ratio | 10.5 |
| Bore × stroke | 84.0 X 75.0 mm |
| Stock power | 170 HP · 245 Nm |
| Remapped power (Stage 1) | 187 HP (+17) · 272 Nm (+27) |
Frequently Asked Questions - BMW 5 serie
How much power can I gain from remapping my BMW 5 serie?
With MasterTuning Stage 1, your BMW 5 serie 523i 170hp can gain +17 HP (from 170 to 187 HP) and +27 Nm of torque. This represents a 10% increase in power.
Is ECU remapping safe for the BMW 5 serie engine?
Yes, MasterTuning's remapping for the BMW 5 serie 523i 170hp is developed within safe parameters. All calibrations are tested on our 4x4 dyno and stay within the mechanical limits of the 256S3 engine.
Is the BMW ECU remapping reversible?
Absolutely. The original factory calibration of your BMW 5 serie 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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