Most 2017 Mégane diesels are the 1.5 dCi / 1.6 dCi units paired with a 5- or 6-speed manual; they are generally economical but like longer runs to keep the DPF happy. Expect a straightforward Renault parts and dealer network in Ireland, but watch for typical diesel items such as DPF/EGR carbon build-up and occasional electrical niggles on older infotainment modules. Manual clutches can last a long time if driven gently, but replacement is a common mid-life service item.

• DPF behaviour: look for frequent forced regens, persistent warning lights or excessive smoke after a run (shows city use/clogged DPF).
• EGR and turbo: check for sluggish response, oil smoke on cold start and any turbo shaft play or oil leaks.
• Clutch and gearbox: test for slipping, a grabby or late-engaging clutch and smooth gear selection through all ratios.
• Suspension and bushes: listen for knocks over bumps and check rear subframe/sill areas for corrosion or worn bushes.
• Electrics/infotainment: confirm touchscreen, reversing camera and door/window functions work reliably (known area for older Meganes).