I've got a 2011 BMW X5 diesel with 189k miles on it. The DPF went out at around 150k, which is roughly the expected lifetime from my understanding. The part alone is ~$4000. Regardless of living in CA, I'd have replaced it anyway because I think it's the right thing to do. (I didn't want a non-DPF diesel that was emitting lots of PM2.5s when I made my purchase).
That said, many people would prefer the money in their bank account. And if I had decided to sell it rather than fix, no doubt it would have gone to someone looking to delete the DPF.
That said, many people would prefer the money in their bank account. And if I had decided to sell it rather than fix, no doubt it would have gone to someone looking to delete the DPF.