Law question - void warranty after modification

Hello, do you know name of the law that protects customers from manufacture voiding the when mechanical issue is not related to the car modification? Have timing cover oil leak and Toyota saying that warranty is voided because I changed suspension. Thank you!

 

https://www.findlaw.com/consumer/co...laws-and-the-magnuson-moss-warranty-act-.html

But isn't your '16 out of warranty anyway? Or do you have an extended one?

 

Thank you, that helps! Lon g story short - fighting with Toyota since 2018. The car was under the warranty when the problem was discovered.

 

Have you tried a different dealership? Sometimes helps if the service manager is willing to go to bat for you.

 

I get to the Toyota corp level, opened 3(!) cases, after 3 attempts dealer confirmed it was engine oil (before they were trying to sell some BS), and then just disappeared, not answering the phone, etc