Mid century bathrooms, original toilets included.
Every toilet problem announces itself, the trick is taking the announcement seriously while it's still cheap. La Mesa's households hear the classics daily. The phantom flush, the tank refilling on its own in a quiet house, which is water escaping past a worn flapper and padding every bill. The run that never quits after flushing, a fill mechanism past its prime. The subtle rock when you sit, mounting bolts loosening, and beneath them a wax seal that's next in line, and when that seal gives, the toilet's problem becomes the floor's problem, and in older La Mesa homes the floor has enough going on already.
The good news runs against instinct, most toilet problems are repairs, not replacements. The working parts inside a tank swap out piece by piece, and a solid unit can serve decades on occasional maintenance. Replacement earns the conversation in specific cases, porcelain that's cracked, repair bills stacking on a unit that's done, or the upgrade path, modern toilets flush better on less water, and bidet installs have gone from novelty to normal, worth folding in whenever a replacement's happening anyway. The honest read on repair versus replace comes from the toilet's actual condition, not from what's on the truck.
One distinction saves confusion, a toilet that backs up usually isn't a toilet problem, it's a drain problem wearing a toilet costume, and the drain side has its own service and its own page. Everything that's genuinely the toilet, the running, the rocking, the leaking, the replacing, gets handled here, plainly explained, properly done, sealed and set so it stays put. Your decision throughout, at your pace. That's how it works.
"Sixty years of hard water turns a flush into a suggestion."