2021 Stonic petrol manuals are typically offered with Kia’s small naturally aspirated 1.2 or the 1.0 T‑GDi three‑cylinder turbo; the turbo is peppy for the size but benefits from regular oil changes. Kia sold the Stonic with a long manufacturer warranty originally (check whether any of the 7‑year warranty remains transferable), and the simple manual gearbox is cheap to run compared with automatics but you should expect clutch wear on high-mileage urban cars.

• Clutch engagement and pedal feel for slip or judder (manual cars used in town often need a clutch replacement by 100–150k km).
• Signs of turbo issues on 1.0T examples: blue smoke under hard acceleration, excessive oil consumption or loud turbo noises.
• Evidence of thumped suspension or worn bushes: knocks over bumps, uneven tyre wear or poor wheel alignment from city pothole damage.
• Condition of engine mounts and vibration at idle — 3‑cylinder engines can show worn mounts after heavy urban use.
• Infotainment, reversing camera and parking sensors operation (common trim items to fail) and check for any water ingress around door seals or boot leading edges.