In short (TL;DR)
- What it is: ECU software for a BMW, adapted to modified hardware (exhaust, intake, intercooler, turbocharger, fuel system).
- What we do: the software work. We do not sell parts or do mechanical work.
- Price: Stage 2 – from €150, Stage 3 – up to €400. The final price depends on the engine and the hardware.
- For what: BMW with modified hardware for which Stage 1 software is no longer enough.
- Limits: the gearbox, clutch, turbocharger and fuel system must withstand higher torque. We discuss this before the work.
- Legal position: a power increase and hardware changes may not match the type approval and may affect insurance and warranty. We recommend informing your insurer.
BMW Stage 2 and Stage 3 is software created for the hardware that is actually installed. Many hardware combinations are popular for BMW engines (e.g. N54, N55, B58, S55 petrol and B47, B57 diesel), so a template file is not a suitable solution.
Stage 1, Stage 2 and Stage 3
| Level | Hardware | Note |
|---|---|---|
| Stage 1 | Factory hardware | The software is adapted to the factory hardware, with no mechanical changes |
| Stage 2 | Usually a modified exhaust system, intake, intercooler | The software is created for the installed hardware |
| Stage 3 | Usually a modified turbocharger, fuel system and other main parts | The most limits and risks |
The gearbox – the main limit
A BMW often has a ZF automatic gearbox (e.g. 8HP). It has torque limits set by the manufacturer, and higher torque also loads the clutch packs. Before the work we discuss whether the gearbox will withstand it and what software limits need to be set. More in the article ZF 8HP and DSG gearbox programming. If the gearbox needs a factory software update, see the EGS update.
What we do not promise
We do not promise a specific power or torque gain in advance: it depends on the engine, the hardware and the ambient conditions. Before the work we tell you what can reasonably be expected. We do not promise lower fuel consumption either.
Price
BMW Stage 2 costs from €150, Stage 3 – up to €400. The final price depends on the engine, the ECU type and the installed hardware; we give it after the discussion. For other makes see diesel and petrol turbo Stage 2–3.
Frequently asked questions
How does Stage 2 differ from Stage 1?
Stage 1 is adapted to factory hardware. Stage 2 is for when important parts have been changed (usually the exhaust, intake, intercooler) and the software is created for that. Stage 3 covers even larger changes, such as the turbocharger and fuel system.
Will my BMW’s gearbox withstand it?
This is one of the main questions. Before the work we assess the gearbox type and its limits and, if needed, limit the software or recommend strengthening the parts.
How much power will you add?
We do not promise a specific number. Before the work we tell you what gain can reasonably be expected in your engine with your hardware.
Can I order Stage 2 without hardware changes?
No. Stage 2 software makes no sense without suitable hardware. If the hardware is not there yet, we recommend starting with Stage 1.
Can the factory software be restored?
Yes. Before the work we save the original ECU software.
Do I need to inform my insurer?
Yes, we recommend it. A power increase and hardware changes are modifications that can affect insurance and warranty.
