Good used pump as shown. Has been tested. Runs smoothly and does not leak. This fits models only with automatic climate control (push button panel.) It is very important you test this pump by unplugging and applying 12-volt power. If it is stuck your climate control heat will fluctuate and not work as well.
This small aux electric heater pump is no longer available new - When it quits working it causes restriction in hot water flow
W116 R107 W123 W126 Auxilary Water Pump Heating System