@MikeInWimbledon in addition to raspy's post it would also be useful to look at eKatie's post on this thread #5960. While prices may vary greatly from country to country, she was quoted 14-15k for the battery to be replaced in Finland.
It would be worth getting a capacity test on the battery before purchase for piece of mind.
The other side of this is that battery failures (as opposed to gradual degrading) appear to be very rare. After 6,000 posts on this forum you would think we would have a good idea of the amount of work involved in and the cost of a battery replacement in the UK or Ireland. The fact that we don't is a positive imo.
It would be worth getting a capacity test on the battery before purchase for piece of mind.
The other side of this is that battery failures (as opposed to gradual degrading) appear to be very rare. After 6,000 posts on this forum you would think we would have a good idea of the amount of work involved in and the cost of a battery replacement in the UK or Ireland. The fact that we don't is a positive imo.