Third time’s a charm
After replacing a wheel bearing, diagnosing and fixing a bad wire to the knock sensor, another trouble code turned up... this time for a lean mixture. Half an hour of troubleshooting later, it turned out an inlet manifold gasket failed (see extra, green one is new, red one is old). So another parts order went out and another job completed on our little green runabout.
I hope this is it for the foreseeable future, I honestly don’t know what I did to the car to deserve such behaviour.
Luckily I don’t have to take it to a garage to have the work done, as it would have cost me much much more than just the few parts I threw at it now...