Standard Ignition FLS-171 Engine Coolant Level Sensor

Engine Coolant Level Sensor for BMW Applications

The Standard Ignition FLS-171 engine coolant level sensor monitors coolant level in the reservoir and helps alert the driver when the system is low. It is a direct-fit electrical sensor with a plug-in connector and OE-style pin terminals for select BMW models.

• Engine coolant level sensor for BMW cooling system service
• Female connector with 1 plug-in connection
• 2 male pin terminals for straightforward electrical hookup
• Direct replacement style for reservoir-level monitoring
• Standard Ignition FLS-171 for select BMW 525i, 530i, 528i, 540i, 740i, 740iL, and 750iL applications

Fitment and Cross Reference

Compatible with 2001-2002 BMW 525i, 2001-2002 BMW 530i, 1998-2000 BMW 528i, 1997-2002 BMW 540i, 1995 BMW 540i, 1997-2001 BMW 740i, 1995 BMW 740i, 1995-2001 BMW 740iL, 1999-2001 BMW 750iL, and 1995 BMW 750iL. This part cross-references OE and aftermarket numbers such as 61311392204 and SU13189 for the same application. The Standard Ignition FLS-171 is a fitment-based replacement for BMW coolant level sensor service on these vehicles.

What It Helps Address

• Low coolant warning concerns
• Inaccurate coolant level readings
• Faulty reservoir sensor signal
• Cooling system warning light complaints
• Replacement needs during BMW cooling system repair

Installation Notes and Tips

Verify connector style, terminal layout, and reservoir application before installation. Inspect the coolant tank and electrical connector for corrosion, damaged pins, or cracked plastic that could affect sensor operation. Confirm the sensor seats fully and the cooling system is filled and bled according to the vehicle service procedure after replacement.

Quality Assurance

Standard Ignition supplies replacement electrical and engine management components built to match OE-style fit and function expectations for service work. The FLS-171 is a practical choice for BMW coolant level sensor replacement when the original sensor has failed or is sending an incorrect level signal.