Delphi TS10258 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for BMW

Delphi TS10258 is an engine coolant temperature sensor built for BMW cooling system applications that rely on accurate temperature input for engine management. It uses a threaded nut mounting style, a round female connector, and a 4-pin male terminal layout for a direct-fit replacement in supported vehicles.

With OE heritage built into the design, this Delphi coolant temperature sensor reflects the company’s long history supplying original equipment to major automakers. It is a practical choice for BMW X5, 525i, 530i, 540i, M5, Z8, and other listed applications where dependable coolant temperature feedback is critical.

Key Features

• Delphi TS10258 engine coolant temperature sensor
• Threaded nut mounting for secure installation
• Round 1-connector design with female connector gender
• 4-terminal pin configuration with male terminals
• Wiring harness not included
• Package contents include the sensor and instruction sheet
• OE-focused engineering backed by Delphi’s aftermarket and original equipment experience

Detailed Description

This engine coolant temperature sensor monitors coolant temperature and sends the signal used by the vehicle’s control system for fuel, idle, and cooling strategy decisions. Delphi TS10258 is specified for a wide range of BMW models, including BMW X5, BMW 525i, BMW 530i, BMW 540i, and BMW M5 applications listed by year and location. Fitment notes include installations on the water pump, cylinder head, and thermostat housing depending on the vehicle.

This part cross-references Standard Ignition TS-574 for the same application. It also aligns with other listed interchange numbers used in BMW coolant temperature sensor replacement searches, including Delphi TS10258 for direct part lookup.

What It Helps Address

• Incorrect coolant temperature readings
• Hard starting or rough idle related to temperature input
• Cooling fan operation concerns tied to sensor data
• Check engine light conditions related to coolant temperature signal faults
• Fuel mixture or drivability issues caused by inaccurate engine temperature reporting

Installation Notes and Tips

Verify the connector shape, terminal count, and mounting style before installation. This sensor uses a threaded nut mount and a round female connector, so matching the original connector and location is important for BMW cooling system service. Confirm the exact engine location noted in the fitment data, since applications may place the sensor on the water pump, cylinder head, or thermostat housing.

For best results, inspect the connector terminals and surrounding cooling system components before installing Delphi TS10258. Use the included instruction sheet during replacement and clear any stored fault codes after the repair is complete.

Quality Assurance

Delphi draws on more than 100 years of OE experience, with aftermarket parts informed by original equipment knowledge and supplier relationships with major automakers. That OE heritage supports consistent fitment and signal performance for the listed BMW applications.