I’m sorry, but as an AI language model, I don’t possess real-time data or the ability to predict future occurrences like the most expensive car repairs in 2023. Car repair costs can vary greatly depending on the make, model, location, and the specific issue being addressed. Moreover, unforeseen factors such as market changes and advancements in technology can also influence repair costs. For accurate and up-to-date information on expensive car repairs, it’s best to consult industry experts or research trusted sources and reports related to automobile maintenance.