Delphi TS10251 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Audi and Volkswagen

The Delphi TS10251 engine coolant temperature sensor provides a direct-fit replacement for select Audi and Volkswagen applications with a 2-pin white sensor design. Built from Delphi’s OE heritage and aftermarket engineering knowledge, it is made for accurate coolant temperature signal delivery to the engine management system.

Key Features

• Engine coolant temperature sensor for select Audi A6, A6 Quattro, Cabriolet, 100, 100 Quattro, 90, 90 Quattro, 80, 4000, Coupe, and Volkswagen Fox, Golf, Jetta, and Passat applications
• Delphi part number TS10251
• Blade terminal design with 2 terminals
• 1 female rectangle connector
• Threaded nut mounting type for secure installation
• Package includes the engine coolant temperature sensor and instruction sheet
• No wiring harness included

Detailed Description

The Delphi TS10251 is an engine coolant temperature sensor engineered for vehicles that rely on precise coolant temperature input for fuel control, idle strategy, and temperature-related engine management functions. It features a blade terminal layout, a single female rectangle connector, and a threaded nut mounting style for a straightforward replacement on the listed Audi and Volkswagen models. This part cross-references Standard Ignition TX55 for the same application.

Delphi draws on more than a century of OE experience, and that background is reflected in the design and application coverage of TS10251. If you are servicing a 1990-1993 Volkswagen Golf, a 1995-1998 Audi A6 Quattro, or another listed fitment, this sensor is built to match the original style used on those vehicles. The Delphi TS10251 is also referenced by part number TS10251 for ordering and catalog lookup.

What It Helps Address

• Incorrect coolant temperature signal to the engine control system
• Hard starting when the engine is cold
• Rough idle caused by inaccurate temperature input
• Fuel mixture issues related to coolant temperature reporting
• Temperature gauge or engine management warning concerns tied to sensor failure

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. This sensor uses a threaded nut mount and a 2-pin configuration, so confirm the original part matches those details on your Audi or Volkswagen application. The included instruction sheet should be reviewed before installation, and the wiring harness is not included.

Compatible With 1995-1998 Audi A6 Quattro, 1994-1998 Audi Cabriolet, 1995-1997 Audi A6, 1993-1995 Audi 90 and 90 Quattro, 1992-1994 Audi 100 and 100 Quattro, 1990-1993 Volkswagen Fox and Passat, 1990-1992 Volkswagen Golf and Jetta, 1990 Audi 80, 1988-1989 Audi 80, 1987-1989 Volkswagen Fox, 1985-1989 Volkswagen Golf and Jetta, 1988 Audi 90, 1985-1987 Audi 4000 and Coupe.

Quality Assurance

Delphi builds aftermarket parts using OE experience and application knowledge developed through long-term supplier relationships with major automakers. That OE-based approach supports consistent fit and function for the listed Audi and Volkswagen vehicles.