Quick view VDO Kitas2+ RI Smart tachograph sensor - M18x1.5 - 23.8mm - Lead-free VDO 2171-20100315 Smart tachograph sensor: Kitas2+ Tachograph: DTCO 1381 - MTCO 1324 Application: See specifications Thread: M18x1.5 Sensor (L) = 23.8mm - Ring = 1.2mm ISO15170 Plug: 4-pin natural