Crankcase Pressure Sensor for Volvo VNL / Volvo D13. Manufacturer Part Number 21634017 21746206. Durable ZTech Crankcase Pressure Sensor: Designed specifically for Volvo VNL / Volvo D13 engines, this reliable sensor 21634017 ensures optimal and reliable performance. High-Quality Part Numbers 21634017 21746206: Trust in these genuine part numbers for easy ide...