Copying my comment from another com:

Ok, but real talk: they blame it on the "economy", but a lot of car forums I frequent actively tell people do not buy Bosch for things like spark plugs and O2 sensors because they're no good. Back in the 90s Bosch was the only thing to buy. If you lose your customer base because you're cutting corners, you can't blame it on the economy anymore. That's all on you, bud.