Like in healthcare, specific automotive updates are urgent and may be critical. Delivering them by email entails a risk of the message not being read or landing in the spam folder. As mentioned above, this is not the case in text messaging.
Deliver updates on ongoing safety critical recall actions for faulty or dangerous components. This way the messages are more likely to be delivered and read. Straight from the texting app, you can allow the recipient to schedule an appointment with the service by responding with a preferred date and time for a visit at the dealer.
New car users, you can deliver occasional usage tips and let them ask follow-up questions to quickly dispel their concerns and provide ongoing support.