The Mueller-Kueps NOX Sensor Thread Restorer Kit, No. 506 021, is designed to allow technicians to professionally restore the NOX sensor hole thread without damaging the exhaust system. The kit is universal for light- and heavy-duty diesel engines. It features an alignment guide at the front of the restorer to ensure proper angle and is extra short, enabling it to be used with a socket or ratchet spanner for narrow spaces. The time-saving tool can also be used for the diesel particulate filter as well as any exhaust sensor, even those located in a catalytic convertor. Available in sizes M20 x 1.5 and M22 x 1.5.
