URO 61311378320 Engine Coolant Level Sensor

BMW Coolant Level Sensor Replacement

This URO engine coolant level sensor is a direct-fit OE replacement for select BMW models with a 109mm sensor length. It is built to restore accurate coolant level monitoring in the reservoir tank and help eliminate false low-coolant warnings on BMW 325i, 535i, 740i, and related applications.

Part number 61311378320 is designed for plug-and-play installation and reliable electrical performance in the cooling system.

Key Features

• Direct-fit replacement for the coolant reservoir tank
• Helps correct false low coolant indicator warnings
• Helps restore warning function when coolant level is actually low
• Easy plug-and-play wiring connection
• High-quality polymer and corrosion-resistant metal construction
• Alloy conductors help maintain low electrical resistance for accurate operation
• Designed for long service life in high-heat cooling system environments
• 24 Month Unlimited Mileage Warranty

Detailed Description

URO part number 61311378320 is an engine coolant level sensor made for BMW cooling systems that use a 109mm sensor. It installs directly into the coolant reservoir tank and is engineered to provide dependable level detection without requiring modification. This replacement is a practical choice when the original sensor triggers a false warning or no longer alerts the driver to a low coolant condition.

Compatible With select BMW 325i, 325is, 325iX, M3, 535i, 540i, 740i, 740iL, 750iL, 735i, 735iL, 635CSi, M5, M6, 325e, and 325es applications. This part cross-references URO-003492 and 61 31 1 378 320 for the same application.

What It Helps Fix

• False low coolant warning light on the dash
• No warning when coolant level drops too low
• Intermittent coolant level sensor readings
• Electrical resistance issues affecting sensor accuracy
• Heat- and corrosion-related sensor wear in the reservoir tank

Installation Notes

Install this sensor in the coolant reservoir tank using the existing plug-and-play electrical connection. Verify the vehicle uses a 109mm sensor length before ordering. For best results, inspect the reservoir and connector condition during replacement and confirm the cooling system is properly filled after service.

Quality Assurance

URO manufactures this coolant level sensor using polymer and corrosion-resistant metal materials for use in demanding cooling system conditions. Part number 61311378320 is backed by a 24 Month Unlimited Mileage Warranty.