Alpina B3 S - ECU Remap Stage 1

About the Alpina B3 S

The Alpina B3 and B3 S is considered a series of high performance compact executive cars manufactured by German automobile manufacturer Alpina from 1999 to 2006 based on the BMW 3 Series . The B3 used to be available in coupé, saloon, convertible and station wagon body styles. The more powerful B3 S used to be introduced at the 2002 Paris Motor Show.

Why Stage 1 for the 3.5i 400hp

Our Stage 1 calibration is designed for a completely stock vehicle — no hardware changes required. In practice this delivers a safe and reversible improvement in drivability.

Typical gains on healthy examples are from around 400 HP to 450 HP and from 540 Nm to 600 Nm (indicative; varies by condition).

What we do

• Initial diagnostics and a full backup of the original ECU file
• Calibration of timing/fuelling, torque limiters and boost strategies
• Throttle response and power delivery refinement with a focus on smoothness
• Road testing and post-map parameter checks

Safety and Warranty

We follow a conservative approach, maintaining thermal and mechanical margins to protect longevity.

The process is fully reversible (factory file can be restored) and requires no physical modifications.

Summary

A Stage 1 remap turns the Alpina B3 S 3.5i 400hp into a more responsive daily driver while keeping stock-like manners.

Contact us for a free quote and eligibility check.