I've ben using this device for five years now and my car is still running normally.
FYI, I've already install in my sis in law's innova and the first different thing that we felt was the gear change was very fast and better acceleration. Fuel consumption, we'll know when they drive back to shah alam. Got power got savings.
---------- Post added at 02:11 PM ---------- Previous post was at 02:07 PM ----------
For under warranty cars, you can install the device but before sending for servicing it's better to remove it. The service man might be curious with the device and tamper with it.