Subaru

The flat engine of Impreza and Forester. As with all boxers, head gasket wear is typical - oil leaks are the first sign before ignition codes appear.

The legendary turbo boxer of the WRX and Legacy. Iconic but demanding - head gaskets and worn coils are classic issues, and ignoring misfires under boost gets expensive fast.

The EJ's successor in the WRX - more modern direct injection, but still sensitive to overboost and overheating under aggressive driving.