No, but any car dealer with a scrap of intelligence would either make *sure* that the cambelt had been changed, or if it was due, sell the car with a new one fitted, or advise the customer to get it done ASAP. A lot don't, but it'd be within their interests, as the cambelt *could* snap within as little as a few days after the customer buys the car, and that would be very highly likely to show the car as unsuitable for the purpose.