Originally Posted by IanS100
If the tints exceed the legal max the police can stop and fine you or even impounded the car. If you're involved in an accident where it could be reasonably inferred that the tints were to blame your insurer could decide that your vehicle insurance is not valid. I'd also check with your insurer before installing tints as I've had insurance refused in the past purely because I had aftermarket tints!
edit: If your car already has factory tints on the front windows it's likely that they're already at the max allowed & any additional tint would put them well over.
It doesn't already have tints on but I rang the guy I was gonna get to do it and he said the glass is factory made with 75% of light to pass through it and that's the legal limit!