The Astra K (badged Vauxhall in the UK and Opel in the rest of Europe) represents the last generation developed under the General Motors era (D2XX platform) before the takeover by PSA/Stellantis. Voted 2016 European Car of the Year, it stands out for a drastic weight loss program (up to 200 kg lighter than the heavy Astra J), significantly improving its handling and efficiency. The 2019 facelift introduced new 3-cylinder engines (petrol and diesel) still sourced from GM, and not from the PSA parts bin. It is a well-rounded compact car, but its mechanical reliability depends heavily on the chosen engine and the maintenance history (especially the type of oil used).
The Astra K is a compact car full of dynamic qualities, but it requires great vigilance when buying. Avoid the 1.6 CDTi at all costs if the timing chain has not been replaced, as well as the 1.4 Turbo petrol if the service book does not prove the exclusive use of Dexos 1 Gen 2 oil (risk of engine failure due to LSPI). On the other hand, the 1.0 Turbo (105 hp) and 1.6 Turbo (200 hp) versions are excellent choices, reliable and economical. The facelifted models (post-2019) with the 1.2 Turbo GM engines are also good alternatives. Negotiate firmly if the history is unclear.