Oxygen Sensor Spacer Extender with Built-in Catalyst Filter

Tired of persistent check engine lights triggered by error codes P0420, P0430, P0421, P0431 caused by aging or clogged three-way catalytic converters? Our oxygen sensor spacer adapter provides an efficient solution. Simply install this adapter between your vehicle’s rear oxygen sensor and exhaust pipe to adjust the sensor sampling environment. The built-in miniature ceramic catalytic filter balances exhaust signal readings to clear catalytic efficiency fault codes without complicated exhaust system modifications. Key Features ✅ Built-in Mini Catalyst Filter Screen Upgraded design with integrated ceramic small three-way catalyst. It filters exhaust gas to optimize data received by the rear O2 sensor, effectively resolving common trouble codes P0420, P0430, P0422, P0433. ✅ Premium 304 Stainless Steel Construction Made of corrosion-resistant stainless steel, withstands high exhaust temperatures, anti-rust, durable for long-term use under harsh exhaust system conditions. ✅ Direct Bolt-On Installation Standard M18*1.5 universal thread, fits most vehicles with threaded oxygen sensors. No cutting, no welding required. Screw this extender onto the exhaust port, then attach the rear oxygen sensor. Quick installation for DIY mechanics and auto shops. ✅ Avoid Costly Catalytic Converter Replacement Skip expensive OEM catalytic converter repairs. This practical auxiliary adapter is an affordable temporary fix for catalyst efficiency faults, ideal for vehicle inspection preparation. ✅ Stable Signal Regulation Creates proper distance between the O2 sensor and exhaust stream. Prevents false low-efficiency readings, eliminates flickering check engine lights. Specifications Material: 304 Stainless Steel Thread Size: Standard M18×1.5 (Universal for most automotive oxygen sensors) Internal Structure: Embedded ceramic catalytic filter Fitment: Rear downstream oxygen sensor Applicable Fault Codes: P0420, P0430, P0421, P0431, P0422, P0433