O2 Sensor Spacer Check Engine Fix

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Eliminate the check engine light caused by catalytic converter-related oxygen sensor faults with this M18x1.5 O2 sensor adapter spacer. By repositioning the downstream oxygen sensor away from direct exhaust flow, it reduces the sensitivity of the sensor reading sufficiently to clear the fault code in vehicles where a catalytic converter inefficiency error is triggering the warning light.

Installation is straightforward for anyone comfortable with basic under-vehicle work — remove the existing downstream O2 sensor, thread the adapter into the bung, and reattach the sensor to the adapter. No cutting, rewiring, or specialist equipment required. The hardened steel construction withstands continuous exhaust temperatures without degradation.

Please note: this adapter is intended for off-road, motorsport, track day, or vehicle restoration use where catalytic converter regulations do not apply. It should not be used on road vehicles where emissions testing compliance is legally required. Always verify your local vehicle modification regulations before installation and consult a qualified mechanic if in doubt.

• M18x1.5 thread specification
• Hardened steel construction
• Heat and corrosion resistant
• Tool-free hand-thread installation
• For off-road and motorsport use only
• Verify local emissions regulations before use