Webasto Thermo Pro 90 Water pump U4840 24v | 1317522A | 9021593B

Webasto Thermo Pro 90 Water Pump U4840 is a genuine Webasto replacement designed for reliable cooling in 24V heating systems. Compatible with Thermo 90 ST and Thermo PRO 90 24V heaters, this pump ensures steady flow and efficient operation. Replace part numbers 1300717A and 9010618A (U4846) with this U4840 unit to maintain optimal performance. Note that for Thermo 90 ST installations a water pump harness (1318928A) is required. Built for marine and automotive climates, the 24V design delivers consistent power and long service life. This authentic Webasto component helps preserve heater efficiency, fuel economy, and passenger comfort, reducing downtime and maintenance costs. Ideal for technicians and DIY enthusiasts seeking genuine parts from Butler Technik.