Working on this new stuff is miserable, not only using CRS unplated bolts in aluminum, but you have all those way over priced sensors, either vacuum or electrical, one tiny slip of the wrench, will break the tops off. With steel in aluminum, get electrolysis, trying to remove these bolts, the head will break off.
One reason why I hate buying a used vehicle, but don't have much choice with kids in college, and the cost of insurance is more than what you paid for the vehicle. Never paid more than trade in value, rare for any dealer to give you trade in value. Ha, my neighbor tries to trade in his Ford 350, book said $15,700.00 for it, was only offered $7,000 for it, he owed $15,000.00 on it.
Two vehicles come to mind, a 98 Ford Escort, coudn't check every bolt in this thing, water pump was new with four bolts, two were broken off and a ton of RTV was added, did last a couple of month, but rather than remove the engine, removed the strut assembly, drilled holes in the wheel well, patched those when done. And rather than using cheap CRS bolts retapped for English using grade 8 bolts, they don't break off. But was an all day job.
Another was on a 93 Bravada kid wanted, instead of using a cast iron case, cheap sheet metal, large hole was rusted through. Only way to properly shim this things is with a wire gauge for 0.020 clearance, if not, will tear up the ring gear. Torx screws were used for the flywheel cover, even pounding the correct bit in, little torque on the wrench rounded the inside out. Another all day job, all that four wheel drive stuff had to be removed to get access to these bolts. Another case where English grade 8 hex bolts were used. Hate Torx with a passion, but production sure loves these things, are tappered to fit on a bit and stick there to save a couple of seconds, but after this, misery for the guy who has to work on this crap.
Can repair a brass radiator or condenser, aluminum and plastic are throwaway for only $$$$$$$$. R-134a is really miserable, only correct way to work on these things is a complete flush with this stupid PAG oil. If not done these way, even the slightest bit of moisture forms an acid that will eat these things for the inside out. R-12 never had this problem.
Many new problems that were never problems before.