Instead of buying new and having to suffer a great loss of initial depreciation, you really should consider buying used. There are many fine vehicles that come off a two or three year lease that are well maintained and have significant life left with a 40% discount from new. The advantage you have is you can watch the market closely until the right off lease or used vehicle is available.
Your existing vehicle, as already posted, is getting "long in the tooth" and you can expect to replace some items along the way. What can happen, however, is that you can face a failure that disables the vehicle and repair cost approaches the vehicle's value. Without the repair, the vehicle is worth its scrap value, and with the repair, you have invested a lot of money without any return. That is a difficult position to be in.
If I were in your position, I would buy the right used vehicle.
