Enter .

The M54 engine is known for being responsive to timing advance, provided high-octane fuel is used. OpenMS41 allows users to adjust ignition timing tables to extract more horsepower from the engine, or conversely, pull timing to prevent knock (detonation) in hotter climates or with lower-quality fuel.

For deep dives, technical documentation, and the latest definition files, the OpenMS41 Wiki serves as the central hub for the community.

docker pull openms/openms:4.1.0

However, developers sometimes tag internal builds as openms41 in CI pipelines (e.g., Jenkins build #41 for a feature branch named feature/openms4.1 ). If you saw this in a .docker or .sif container name, it is likely .

for a 4.1‑like feature

Notice: . The next major increment (4.0) is still on the roadmap. Therefore, “openms41” would require 4.0 → then 4.1, which is at least 1–2 years away.

is widely considered the gold standard for DIY tuning of the BMW Siemens MS41 ECU, commonly found in E36, E38, and E39 models from the late '90s. It isn't a single software package, but rather a community-driven repository of definitions and tools that allow you to use to tune your BMW. The Verdict: Is it Worth It?