Recently by Eric Peters: The Next Step
When does it no longer make economic sense to pay for new repairs to an old car? When is it time, in other words, to throw it in the woods or just sell/trade the thing?
Here are some guidelines:
You cant depend on it anymore
Is it realistic to expect that the car will be reliable again after whatevers wrong is fixed? Or will you merely have fixed the latest thing to go wrong?
Some cars start out better-built than others and so last longer than other cars. But eventually, all cars reach a point where problems due to age and the wear and tear associated with long use become general in the same way that as we age, isolated, individual problems that resolve on their own or which can be treated effectively become chronic and systemic and theres nothing you can do about them except crutch them with pain meds or other palliatives. The aging body cant really be fixed anymore.
An aging car can be fixed, of course if money (and time) is no object. Even a complete basket case car can be restored to as-new condition if your wallets deep enough. But thats neither here nor there when were talking about cars as appliances as a means of getting from A to B. And when money and time and hassle are the deciding factors.
Like our physical bodies, cars are really multiple different systems operating in concert. When its just one thing thats gone wrong and once that one things fixed the car can be counted on to run reliably for some time to come, doing the repairs makes sense. But when the entire car is getting obviously tired and several systems are on the verge of collapse, its probably time to say your goodbyes.
Its no longer safe
Rust is the major factor here. Not cosmetic rust structural rust. The frame (and critical mounting points on the frame). Structural damage to the frame/mounting points due to corrosion takes longer to manifest nowadays because cars built since the late 80s are much better protected (and have better body integrity) than vehicles built before that time when it was common to see cars only a few years old with significant rust problems. But that doesnt mean your later model car is impervious to rust. If you keep it long enough especially if you live near the sea or drive in an area where road salt is used in the winter youll have to deal with rust problems.
Any car that is more than 10 years old that has ever been driven in an area where it was subjected to road salt or sea spray should be inspected on the underside very thoroughly at least once a year by someone who knows how to spot potential safety issues related to structural rust-through. The inspection should also include a close look at (usually) steel brake, clutch master cylinder and fuel lines. Rust-weakened lines can easily break and can be expensive to replace.
If structural rust is found, its time for Last Rites. The only way to fix this sort of problem is by cutting out the bad section(s) with a torch and welding in new metal which is neither easy nor inexpensive. And then youve only fixed one cancerous area. If youve got one, odds are youve got more.
Its becoming hard to find essential parts
My father-in-law had (until recently) an otherwise nice early 90s-era Cadillac. The car still ran well but when the AC stopped working he found out that the part he needed is no longer being made by GM. Eventually he found a good condition used part from a salvage yard but scrounging junkyards is not something many people want to deal with. Even if you succeed in finding the part you need, itll be a used part that comes with no guarantee it will work any better than the one youve got. Or it might only last for a few weeks/months. Theres no way to know and no alternative.
As a general rule, if the car is more than 20 years old especially if its a modern car with electronics, such as a digital dashboard or electronic climate-controlled AC some critical parts may be unavailable new and hard to find used. They will probably also be expensive, too which leads to the biggest consideration of all:
You are putting more money into the car than the value of the car
Heres the Catch-22 you dont want to find yourself facing: The transmission in your 16-year-old car fails and a new/rebuilt replacement will cost you $2,000. But the car itself is only worth about that much much. If you spend the $2k on the new transmission, the car will not be worth $2k more. It will be worth about the same as it was worth before the old transmission failed.
On the other hand, if you dont put the $2k new transmission in, the car (not-drivable and needing a major repairs) will be worth nothing. Or almost nothing. You might get a few hundred bucks for it as a parts/scrap car. Maybe.
You cant win.
Even if youre thinking: Well, Ill spend the $2k on the new transmission and then just drive the car for another couple of years. The problem is that if something else goes wrong and it probably will go wrong youll be throwing more money down the well and facing the same Catch-22 all over again.
This is your cue: Its time to cut your losses and throw it in the woods.