BMW 1 135i - N54 306hp N54B30 Stage 2 (306PS / 6) - Reviews | MSD81

BMW 1 135i - N54 306hp N54B30 Stage 2 (306PS / 6) - Reviews | MSD81
1-Series 135i N54B30 | MSD81 IFN3S Siemens | ECU Files
This is an all-inclusive Stage 2 tuning package for the legendary BMW 135i, powered by the twin-turbo N54B30 engine and managed by a Siemens MSD81 ECU. This package is designed for highly modified vehicles, providing ultimate flexibility with multiple file options for a full-feature track build.

The core of the package is a powerful Stage 2 tune calibrated for a decat exhaust, targeting an incredible 421 horsepower and 569 Nm of torque. It includes Vmax removal and an aggressive Pop & Bang map. Also included is a variation with added features like a cat heating раtсh and a TP (Torque Monitoring) раtсh for specific hardware or diagnostic needs. This is the ultimate software solution for a fully built N54 track car.

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New Tuning File Available: 1-Series 135i N54B30 | MSD81 IFN3S Siemens | ECU Files JE0SIFN3S - BMW Stage 2 Tuning Pack — SW: IFN3S — 0044CC0IJE0SIFN3S — A full-feature package for your 135i with a ~421Hp decat tune, Vmax off, and Pop & Bang options for track use.

💬 Discussion & Reviews: BMW 135i - N54 306hp (N54B30)​


Welcome to the official discussion thread for the BMW 135i - N54 306hp (N54B30) tuning package. This calibration is specifically developed for the MSD81 ECU and optimized to work seamlessly with the 6.

Target Performance: 306.0 PS / 225.1 kW.

👇 Share your experience!
Have you flashed this file? Drop your dyno graphs, 0-100 times, reviews, or ask any technical questions below!

All tuning files were acquired through official EVC.de resellers and verified on a professional dynamometer. Each calibration corresponds to the developer listed in the “Modified By” section — performance graphs may be available on their official website. These files are intended for motorsport or off-road use only. Ensure proper installation and do not operate the vehicle aggressively without first confirming mechanical condition. The seller accepts no responsibility for misuse or non-compliant road use.

Extended Product Information​

  • Calibrated for a target output of ~421Hp and 569Nm.
  • Requires a full decat exhaust, upgraded intercooler, and intake.
  • Vmax (top speed limiter) deactivated.
  • Aggressive Pop & Bang (overrun burble) enabled.
  • Optional version with Cat Heating removal and a TP (Torque Monitoring) раtсh.
  • DCT transmission logic optimized for faster shifts and higher torque.

➜ Download Tuning File / View Full Specs
 
Nicoletta said:
Hi, does the tune include the 3.5 bar mоd? Thanx
Click to expand...

Hi, based on the product description provided above, the 3.5 bar TMAP sensor scaling is not listed in the features.

The specified modifications are:
  • Stage 2 (~421Hp)
  • Vmax removal
  • Decat / Cat Heating removal
  • Pop & Bang
  • TP (Torque раtсh)

Usually, if a file is calibrated for the 3.5 bar (N20) sensor, it is explicitly mentioned as a requirement because the ECU scaling must match the hardware. Given that it is not listed, you should assume this is calibrated for the standard 2.5 bar sensor.
 
Nicoletta said:
Is there a tune file for a 3.5 bar TMAP sensor scaling?
Click to expand...

According to the file list provided in the description, there is no version specifically labeled for 3.5 bar TMAP scaling.

The available versions are:
  • Stage 2 + Vmax + Decat + Pop & Bang
  • Stage 2 + Vmax + Cat Heating + Decat + Pop & Bang + TP

If you have installed the N20 3.5 bar sensor, you cannot use these files as the voltage scaling will be incorrect for the ECU. These files are likely calibrated for the stock 2.5 bar sensor.
 
Nicoletta said:
Or is it too risky for the engine? or any reason you can think of?
Click to expand...

It is not that the 3.5 bar sensor itself is risky—in fact, it is safer if you are running very high boost—but there are likely practical reasons why it is not included in this specific file set:

  • Boost Limits: This Stage 2 tune targets ~421hp. On an N54, this is typically achieved with boost levels around 17–19 psi. The stock 2.5 bar TMAP sensor can read up to approximately 21.5 psi (1.5 bar boost). Since the target boost is within the range of the stock sensor, the upgrade is not strictly necessary.
  • Plug-and-Play: The 3.5 bar sensor (usually the N20 sensor) requires a physical adapter harness and hardware installation. Most standard "Stage 2" files are designed for the stock sensor setup to ensure ease of use for the majority of owners.
  • Calibration Mismatch: The real risk comes from mixing hardware. If you install a 3.5 bar sensor but use a file calibrated for the stock 2.5 bar sensor (like these appear to be), the ECU will misread the boost pressure. This will cause the car to run poorly, throw codes, or potentially run dangerously lean.

In short: For ~421hp, the stock sensor is sufficient. The 3.5 bar sensor is usually reserved for larger turbo upgrades or aggressive tunes pushing past 21+ psi.
 
Nicoletta said:
Can this file be used on a 335I N54B30?
Click to expand...

Technically, the engine (N54B30) is the same, but you cannot simply assume it will work. You must verify the ECU Hardware and Software Version of your 335i first.

Here is why you need to be careful:

  • ECU Type: This file is for MSD81. Many earlier 335i models (2006–2008) came with the MSD80 ECU. If your 335i has MSD80, this file is completely incompatible.
  • Software Version: The file is based on SW version IFN3S (related to the IJE0S ROM family). Even if you have an MSD81 ECU, your software version might be different (e.g., I8A0S).

Recommendation:
Read your 335i ECU ID first. If the HW and SW numbers do not match 0044CC0IJE0SIFN3S exactly, do not flash this file. Flashing a file with mismatched software versions can brick the ECU or cause the car not to start.
 

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