I want a used car that avoids direct injection, CVTs, and turbos for simplicity and long-term reliability. Which models still use port injection, traditional automatics, and naturally aspirated engines?

The Toyota Corolla is your best bet. Owner data shows it uses port injection, a traditional automatic transmission, and a naturally aspirated engine across many model years, especially from 2005 through the early 2020s. This combination avoids the direct injection, CVT, and turbocharging you want to skip. The Kia Sportage and Mazda 3 don't match your requirements based on the data.

The Kia Sportage from 2016-2026 typically uses direct injection and turbocharged engines, especially on higher trims. Owner reports don't mention port injection or naturally aspirated options that fit your needs. The median price is around $29,365, which is higher than the Corolla and doesn't align with your simplicity goal.

The Mazda 3 has no owner data available for this analysis. Without reports on its injection type, transmission, or engine, it can't be recommended. You'd need to check specific model years yourself, but the data here doesn't support it.

The Toyota Corolla is the clear winner. Owner data from 2005-2026 models shows consistent use of port injection and a traditional automatic transmission, with naturally aspirated engines. Common issues reported include occasional AC problems and minor electrical glitches, but nothing related to direct injection or CVT failures. The median price is around $20,284, making it affordable. It suits buyers who want a simple, reliable car without modern complexity.

For your situation, stick with the Toyota Corolla. It directly meets your criteria for port injection, a traditional automatic, and a naturally aspirated engine. Avoid the Kia Sportage and skip the Mazda 3 until you can verify its specs from other sources. The Corolla gives you the long-term reliability you're after.