Dental Crown (PFM) chip, does it need to replaced? (Photos)

Hi I have a PFM crown on a back molar which is probably 12 years old and I am hesitant to replace it as I don't have a problem with it even with the chip. The dentist recommends I replace, the x-ray looked fine - it does not have a root canal done. I've posted some picture I took and wanted to get a idea if I can leave the existing PFM without any issue. I don't want to go through the experience of replacing it but if I do have to replace it what crown should be placed to avoid this problem. Thanks