Standard Ignition FLS-52 Engine Coolant Level Sensor

Engine Coolant Level Sensor Overview

Standard Ignition FLS-52 is an engine coolant level sensor built for direct service replacement in select GM vehicles. It uses a 12-volt, 3-terminal blade design with a female plug-in connector and male terminals for straightforward electrical integration.

Compatible With 1989-1993 Buick LeSabre, 1991-1993 Buick Park Avenue, 1991 Buick Century, 1989-1993 Oldsmobile 98, 1992-1993 Oldsmobile 88, 1991-1992 Oldsmobile Custom Cruiser, 1989-1991 Oldsmobile Delta 88, and 1989-1993 Pontiac Bonneville.

Key Features

• Standard Ignition FLS-52 engine coolant level sensor
• Female connector with plug-in style connection
• 3 blade terminals for secure electrical contact
• 12-volt electrical specification
• Built with copper alloy conductors for strong conductivity and reduced resistive loss
• 100% tested for mechanical switching and electrical switching performance

Detailed Description

The FLS-52 is engineered for coolant level monitoring in vehicles that rely on an electrical sensor to report low coolant conditions. Standard Ignition uses robust materials and copper alloy conductors to support stable signal transfer, while production testing verifies switching performance before the part is released. This makes the sensor a practical replacement for service work on Buick LeSabre, Buick Park Avenue, Oldsmobile 98, and Pontiac Bonneville applications where accurate coolant level input matters.

This part cross-references Standard Ignition service numbers such as FLS30 and FLS642 for the same application.

Common Problems This Part Can Address

• Coolant level warning light staying on
• Intermittent or inaccurate low-coolant indication
• Electrical signal loss at the coolant reservoir sensor
• Corrosion or wear at the sensor connector interface
• Failed switching response from the original coolant level sensor

Installation Notes and Tips

Confirm connector style, terminal count, and vehicle application before installation. Inspect the reservoir or mounting area for contamination, damaged terminals, or coolant residue that could affect sensor operation. Verify the electrical connection is fully seated and check the system after installation to confirm the warning circuit responds correctly.

Quality Assurance

Standard Ignition builds this sensor with service-grade materials and tests each unit for mechanical and electrical switching performance. The design reflects long-term research and development focused on technician requirements and dependable replacement fitment.