I have a 2008 n53 525i that just had one injector replaced after it was "pissing" fuel according to the mechanic.
Its had a rough warm start idle for the last year or so and im now worried i may have damaged the engine.
Is there a way to find out wether the piston may have been damaged? The car drives fine and was using just 1 liter per 100km of fuel before and no oil in between oil services (8000km).