There have been some civil lawsuits. IIRC Tesla settled in some cases (though not sure the amounts were substantial), others (including a potential class action) got snagged by the arbitration clause most customers don't bother to opt out of. The statute of limitations had expired in one instance. I'm surprised a group of purchasers didn't go after the company more aggressively, but I think most Tesla owners love their cars despite them not living up to the hype.