Personalisable in-vehicle interfaces offer a flexible way to tailor content and appearance of the interface to suit the driver and bridge a number of functional and emotional issues. A questionnaire based on the technology acceptance model (TAM) was handed out to 137 respondents to study whether personalisable vehicle human-machine interfaces (HMIs) would be accepted for use in vehicles and also to investigate whether the emotionally-associated construct product attachment affects the behavioural intention. The main findings indicate that personalisable systems were fairly well accepted for use in vehicles and a system comprised of personalisable modes displayed the highest behavioural intention. Moreover, as personalisation offers a closer, more emotional and personal connection to the product, a person's attachment to a product was shown to affect the intention to use the product.