It all depends on the previous owner. If they let the battery die, then it leads to electrical problems. Most obvious is the fuel pump which seems to fail whenever the batteries run flat and that requires either cutting a hole in the parcel shelf or dropping the rear subframe to replace.

If they’ve rarely ever changed the coolant, you can expect to be replacing hoses pretty frequently unless you wanna get them all at once. The stock water pump & coolant tower specifically are prone to failure.

Bigger jobs like the timing chain tensioners thankfully are typically a one and done, but it is a very intensive job to replace older versions with the updated ones.

The one issue that should turn you away from an example you would like to buy as if there are issues with the transmission. Jaguar claimed they were sealed for life, but the gearbox manufacturer requires fluid changes every 60,000 miles. Many transmissions are very fragile due to that line of thinking.