DOC #CERT-BADD-4112-91FB
08.09.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
08.09.2026
BMW 5 serie
E39 - 1995 - 2003 523i 170hp Petrol
Original
170HP
245 Nm
Stage 1
187HP
272 Nm
+17 HP / +10% +27 Nm / +11%
Estimated Power and Torque Curve
Customer
Chassis
Date
Signature
Stamp
NOTICE: This document represents estimated values based on database information. It is not valid as official certification without the original handwritten signature and physical stamp of the authorized technician. Performance values may vary based on vehicle condition, fuel quality and operating environment.