From 400 hp to about 430 hp: the BMW M5 5.0 V8 400hp (E39 – 1995 – 2003) becomes noticeably stronger and more responsive with Stage 1 software. Torque climbs from 500 Nm to about 535 Nm.

This is a petrol engine with a displacement of 4,941 cc and engine code 508S1. The engine is controlled by the Siemens/Continental MSS52. The software file can be written with tools such as Alientech KESS3, Alientech KESSv2, CMD CMDFlash and Dimsport New Genius.

Besides Stage 1, the following options are available for this vehicle: DECAT, DTC Removal, FLAPS, Pop & Bang Crackle map and Vmax.

Frequently asked questions

How much power and torque does a BMW M5 5.0 V8 400hp gain with Stage 1?

About 30 hp and 35 Nm: from 400 hp / 500 Nm to roughly 430 hp / 535 Nm. The exact gain depends on engine condition and fuel quality.

Which ECU does a BMW M5 5.0 V8 400hp use?

Siemens/Continental MSS52.

Which tools can read a BMW M5 5.0 V8 400hp?

Alientech KESS3, Alientech KESSv2, CMD CMDFlash and Dimsport New Genius.

Which extra options are available for a BMW M5 5.0 V8 400hp?

DECAT, DTC Removal, FLAPS, Pop & Bang Crackle map and Vmax.

Figures are indicative and vehicle specific. Check the regulations that apply in your country before modifying engine software.