New in the box Genuine Webasto 9004639A Diesel Bunk Cab Heater part. Blower Drive Motor kit for AIRTOP 2000 AT2000 Bunk Cab heaters. This is a very common bunk heater used with many common APU's.
Also used on its own without an APU. Replaces old part # 84841B. Common repair part for these Heaters. New Webasto part with an International tag # WEB9004639A.