The Rear Oxygen Sensor Spacer Extension Adapter is a must-have for vehicle owners who have modified their exhaust systems or are dealing with persistent “Check Engine” lights related to catalytic converter efficiency. This adapter acts as a buffer, extending the distance between the $O_2$ sensor and the exhaust stream to ensure stable readings and prevent error codes. Top Performance Features CEL Fix (Check Engine Light): Specifically engineered to eliminate P0420 and P0421 codes by “spacing” the sensor out of the direct blast of exhaust gases. Integrated Micro Catalyst: (For the model in your photos) Unlike hollow spacers, this version features a built-in miniature catalytic substrate that filters the air reaching the sensor for 99% accuracy. Heavy-Duty Construction: CNC-machined from high-grade 304 Stainless Steel to withstand extreme exhaust temperatures and prevent rust. Standard Threading: Features universal M18 x 1.5 threads, making it compatible with almost all modern passenger and light-commercial vehicles. Product Specifications Feature Specification Material T304 Stainless Steel Thread Type M18 x 1.5 Length ~45mm (Standard Extension) Internal Feature Built-in Micro Catalytic Converter Finish High-Polish Anti-Corrosion Why You Need This Adapter If you have recently installed a high-flow exhaust, a “downpipe,” or if your original catalytic converter is beginning to fail, your car’s ECU will likely trigger a warning light and may even reduce engine power (Limp Mode). This spacer provides a physical and chemical workaround that allows the sensor to report “clean” data to the computer, keeping your dashboard clear and your engine running smoothly. Installation & Maintenance Plug & Play: Simply unscrew your current rear $O_2$ sensor, screw the adapter into the exhaust bung, and then screw the sensor into the adapter. Pro Tip: Always apply a small amount of copper-based anti-seize to the threads before installation. This prevents the adapter from seizing due to the high heat cycles common in the Ugandan climate. Note: Designed for the Downstream (Rear) sensor only. This should not be used on the Upstream (Front) sensor, as that sensor is critical for managing your fuel-to-air ratio.
