What triggers a customer's rescission rights?

Rescission rights for customers are triggered when there are significant factors related to the vehicle that have not been disclosed, which could affect their decision to purchase. In this case, failure to disclose the vehicle's previous use as a taxi is a critical issue. Such information is essential because it can significantly impact the vehicle's value, reliability, and overall condition. If a buyer discovers that the vehicle was previously used as a taxi, they may feel misled, and this lack of transparency can lead to the buyer invoking their right to rescind the contract.

The other options, such as the change in color of the vehicle, the issuance of a new warranty, or the type of tires on the vehicle, do not carry the same implications for the buyer. A color change is typically a cosmetic issue and does not affect the fundamental nature or value of the vehicle. Similarly, offering a new warranty does not negate the initial terms of the contract but rather adds to the consumer's protection. Lastly, the type of tires does not impact the mechanics or history of a vehicle in a way that warrants rescission rights. Thus, the lack of disclosure about the vehicle's previous use is the most critical factor in this context.