Firstly, did you read the article, this isn't a replacement part, its a hack job, look at the pictures, read what they did, this isn't about 3rd party part, this is a service, and a poor one.
Additionally, the terms of your lease, dictate how maintenance is done, and if third party parts are allowed.
Magnuson-Moss act is likely what you are talking about, which wouldn't apply here, firstly because it only applies to warranty claims, and voiding warranties it wouldn't play a role here, additionally because Tesla owns the car, this person is just renting it it has no barring.
Oof, you'd have a heart attack if you knew what mechanics regularly do to "normal" cars.
But yeah, it's the lease contract dictating things. Read your contracts carefully kids, they're often designed to screw you over and (sadly) rarely negotiable.
Additionally, the terms of your lease, dictate how maintenance is done, and if third party parts are allowed.
Magnuson-Moss act is likely what you are talking about, which wouldn't apply here, firstly because it only applies to warranty claims, and voiding warranties it wouldn't play a role here, additionally because Tesla owns the car, this person is just renting it it has no barring.