Opel has been one of Ireland's best-selling brands for decades. The 1.6 CDTi diesel, 1.0 and 1.4 ECOTEC petrols, and Insignia 2.0 CDTi are strong mainstream choices. But the 1.4 Turbo timing chain on early Astras, CDTi injector failures on high-mileage Insignias, and the Zafira B heater blower fire recall have all caught Irish buyers out. Know what to check and Opel offers genuine value.