Same problem with my probe man. Read the packaging bosch will take them back i sent mine in and remarkably the ones they sent me back actually worked. They probably got tired of me hasseling so they made me a set worth a damn. For my alero i went and spent the extra money for the lifetime NGK Iridium Plugs
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3400 V6
MSD Coils - NGK Iridium Plugs - Taylor Wires - 62mm RSM Throttle Body - DHP PCM- 180 Stat - TPS Enhancer - Custom 3" CAI - Thunderbolt Spin Cat no resonator - Dynomax Dual exhaust w/ Borla Tips- Cleared Corners/Black Bezels
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