Spark plug Bosch or OEM Toyota

Bosch Spark plug

I have a shelf of new parts for a bunch of my VW’s. All the cap and rotor parts I can find are the same for either car. They’re brand new. The plugs are brand new as well. Gapped by the Bentley. The plugs were “black” from trying to fire but not.

Pros: new parts, gapped correctly
Cons: plugs were black
Vehicle: Volkswagen
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Bosch Spark plug
zenwren
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Rating 1.0

when I worked for a Chevy dealer we hated Bosch plugs. Chevy's just don't seem to like them, they were often the culprit in misfire diagnosis.

Cons: often culprit in misfire
Vehicle: Chevrolet
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