Lisle 12220 NOx Sensor Thread Chaser M20x1.5

The Lisle 12220 NOx Sensor Thread Chaser is a specialized tool designed to restore and clean damaged threads in M20x1.5 NOx sensor bung holes. This thread chaser is essential for preparing exhaust manifolds, downpipes, and catalytic converters for NOx sensor reinstallation after corrosion or cross-threading has occurred.

Key Features:

• Restores M20x1.5 metric threads for NOx sensor applications
• Cleans rust, carbon buildup, and debris from sensor holes
• Compatible with 13/16" hex socket or 3/8" square drive ratchet
• Prevents costly sensor damage during installation
• Durable construction for professional and DIY use

NOx sensors commonly fail or require replacement on diesel and modern gasoline engines equipped with selective catalytic reduction (SCR) systems. This thread chaser ensures proper thread engagement and prevents exhaust leaks by cleaning and reforming threads before sensor installation. The tool's dual-drive design provides versatility for different wrench and ratchet setups, making it convenient for tight engine bay access.