Toyota Yaris 1.5 111 HP (2018) + GS2 Chip – small car, big character

The Toyota Yaris with the 1.5-liter 111 HP engine is a typical city car that does exactly what you expect from it in daily traffic: it is economical, reliable, and surprisingly agile for its class. But anyone who has ever pressed the accelerator to the floor knows one thing – the Yaris could use a bit more “breathing room”, especially when overtaking.

And this is exactly where the GS2 chip tuning box comes into play.

What does the GS2 chip do in the Yaris 1.5?

The GS2 is an external tuning module that connects to the engine wiring harness. It does not require any modification to the ECU, allowing the vehicle to be restored to factory settings within seconds.

The most important effects the driver will notice:

✔ Better throttle response

The car reacts faster and feels noticeably livelier. The sense of “sluggishness” that may be noticeable in the stock setup disappears.

✔ Pleasant increase in power and torque

You can realistically expect around a 10–15% improvement in performance – and this is clearly noticeable in a city car. The Yaris does not become a hot-hatch, but it drives more confidently and energetically.

✔ Greater flexibility at low RPM

Especially useful in the city and during quick maneuvers where immediate response is important.

✔ Optionally lower fuel consumption

With calm driving, fuel consumption may slightly decrease – although this depends largely on the driver’s style.

Why is the GS2 a perfect match for the Yaris 1.5?

The 1.5 VVT-iE engine operates very cleanly and efficiently, but the factory mapping is conservative. Toyota has played it safe for years, leaving significant software reserves.
The GS2 uses exactly these reserves to improve the engine’s response across different RPM ranges.

The biggest advantage?
Installation takes only a few minutes, leaves no permanent traces, and can be removed easily before a service visit.

Is it safe?

As always, everything depends on the quality of the device and proper installation.
The GS2 is a plug-and-play system that:

• does not permanently modify the ECU,

• does not interfere with Toyota’s safety systems,

• operates within safe parameters.

If the vehicle is well-maintained and regularly serviced, the chip poses no risk.

GS2 or remap – which should you choose?

• GS2 chip – ideal for those who want quick results, easy installation, and the ability to revert to stock settings.

• Professional remapping – offers greater potential but is more expensive and requires ECU intervention.

For the Toyota Yaris used mainly in the city, the GS2 is usually more than sufficient and improves performance exactly where it is needed most.

Conclusion

If you want your Toyota Yaris 1.5 111 HP to gain more vigor, respond faster to throttle input, and drive more “obediently”, the GS2 chip is one of the simplest and most cost-effective ways to improve its performance.