Coolant Level Sensor - E34 525i and E36 M50/M52/S50 (1989-3/1996)
Coolant Level Sensor for expansion tank - controls 'Low Coolant' warning
This part is listed by BMW as BMW part number 11510393338 (11-51-0-393-338) and is described as Coolant Level Sensor (95mm Length) for E36 325i, 325is, 328i, 328is, and M3 (1992, 1993, 1994, 1995, up to 3/1996), as well as E34 525i (1989, 1990, 1991, 1992, 1993, 1994, 1995).
This coolant level sensor is located in the bottom of the coolant expansion tank, and can cause false 'Low Coolant' warnings if the switch is faulty.
This part is manufactured by an aftermarket supplier of European auto parts, including many cooling system components. While not carrying OEM status, this part follows the design of the original very closely and uses similar materials. An aftermarket part may even have the same TUV approval as its OEM counterpart. The brand may even be OEM to another manufacturer besides BMW. This aftermarket brand has a two year warranty - the same as Genuine BMW and OEM brands.
E36 (92-99) > 325i
E36 (92-99) > 325ic
E36 (92-99) > 325is
E36 (92-99) > 328i
E36 (92-99) > 328ic
E36 (92-99) > 328is
E36 (92-99) > M3 (1995)
E34 (89-95) > 525i M20
E34 (89-95) > 525i M50