The Focus is Ford's compact that splits into two completely different ownership experiences depending on what's bolted to the engine. The 2012-2018 PowerShift dual-clutch automatic fails so reliably that owners budget for multiple $2,000 transmission replacements, and the 1.0L EcoBoost's wet timing belt sits in hot oil degrading toward catastrophic engine failure every 60-80k miles. Manual transmission models across all generations are a different story, scrappy, fun to drive, and genuinely durable, with the 2000-2011 cars earning particular loyalty for hitting 200k+ miles on basic maintenance. Buy a manual from any era and you'll likely be fine; buy a 2012-2018 automatic and you're inheriting someone else's repair bills.
The Sentra is Nissan's bet that you'll trade long-term confidence for $5,000 in your pocket today, and honestly, it's not a terrible wager if you know the terms. The current generation looks sharp, rides comfortably, and delivers 40+ mpg, but the CVT's catastrophic 2014-2019 failure history casts a long shadow even though the redesigned unit seems genuinely improved. The 149hp engine wheezes on highway merges, and oil changes require removing 28 belly-pan fasteners with no access door, turning routine maintenance into an expensive ordeal. Buy it if the price gap matters more than resale value and you'll commit to 30k-mile CVT fluid changes; walk if you need a car you can confidently drive past 100k miles without a transmission fund.