Reddit reviews PitVisit O2 Sensor Bung Plug M18 x 1.5 Oxygen Wideband Sensor Bung Plug with 22mm Hex Head fits Bosch Type Lambda Sensor and Standard Bung Universal Fit (1 Pack)

PERFECT SEAL - PitVisit's O2 sensor bung plug will seal any O2 sensor or wideband air/fuel O2 sensor bung that is not being used in the exhaust system.EASY INSTALL - Using the standard thread pitch (M18x1.5) and 22mm hex head, PitVisit's O2 sensor bung plugs make it simple to install onto your exhaust system.HEX HEAD - PitVisit's O2 sensor bung plug design includes a 22mm hex head that is more durable and easily accessible than Allen head type plugs.NO LEAKS - PitVisit's O2 sensor bung plugs create a tight seal to prevent any exhaust leaks.UNIVERSAL FITMENT - Fits M18 x 1.5 standard thread pitch for modern O2 sensors and wideband air/fuel O2 sensors. Designed to fit standard Bosch style Lambda sensors and will fit all M18 x 1.5 bungs.