Product Type: Parking Heater Preheating Plug OE Number: 91370B Material: Silicon nitride, ceramic Current (A): 5-6.9A Power (W): 42-55W Applicable Models: Webasto Air Top 3500 12V and Webasto Air Top 5000 12V 1. Installation: This parking heater preheating plug can replace Webasto Air Top 3500 12V and Webasto Air Top 5000 12V. 2. Function: Used to preheat the engine and passenger compartment in low-temperature winter environments, completely eliminating wear caused by cold starts. 3. Precision Manufacturing: Made with silicon nitride ceramic as the matrix and tungsten wire as the heating source, through hot pressing, sintering, grinding, and welding. 4. High Performance: Long service life, light weight, energy saving, fast heating, high temperature resistance, fast heating speed, and good low-temperature starting performance. 5. Practical: The parking heater preheating pin can quickly carburize, ignite, and burn fuel, and its high power of 4255 W can be quickly increased to keep the engine warm for a short time after starting.