Vehicle Repair and Law Thread

Looking for advice on your car or motorcycle? Want to know if your modification or equipment is legal? Have a simple question but don’t want to start an entire thread (me neither, which is why I ironically created this thread)? Ask it here!

Considering that Taipei is so hot and humid, and the coldest days in January is T-shirt weather for someone that spent the winter in -30°F/-34°C “Minne-snow-ta”, are remote starters legal and commonplace in cars?

In the US, 8 out of 10 past rentals (I travel for work) and just about every new car has them (especially domestics), but Google’s search quality has gone way downhill and keeps redirecting me elsewhere, it was mentioned in passing in a few threads here but doesn’t mention legality, and car specs don’t seem to mention it. Thanks!