From 125 hp to about 135 hp: the Volkswagen Golf 1.8i 20v 125hp (Golf 4 – 1997 – 2003) becomes noticeably stronger and more responsive with Stage 1 software. Torque climbs from 170 Nm to about 185 Nm.

This is a petrol engine with a displacement of 1,781 cc and engine code AGN. The engine is controlled by the Bosch ME7.5.1 and Bosch M3.8.3 DAMOS 37R. The software file can be written with tools such as Alientech KESSv2.

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

Frequently asked questions

How much power and torque does a Volkswagen Golf 1.8i 20v 125hp gain with Stage 1?

About 10 hp and 15 Nm: from 125 hp / 170 Nm to roughly 135 hp / 185 Nm. The exact gain depends on engine condition and fuel quality.

Which ECU does a Volkswagen Golf 1.8i 20v 125hp use?

Bosch ME7.5.1 and Bosch M3.8.3 DAMOS 37R.

Which tools can read a Volkswagen Golf 1.8i 20v 125hp?

Alientech KESSv2.

Which extra options are available for a Volkswagen Golf 1.8i 20v 125hp?

Anti lag, DECAT, DTC Removal, START/STOP OFF, 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.