Delphi TS10278 Engine Coolant Temperature Sensor - Rear

Engine Coolant Temperature Sensor Overview

Delphi TS10278 is an engine coolant temperature sensor built for accurate coolant temperature monitoring in a wide range of Audi, Volkswagen, and Porsche applications. It uses a blade terminal design with a female oval connector and push-on mounting for OE-style service replacement.

Backed by Delphi’s OE heritage and decades of supplier experience with major automakers, this coolant temperature sensor is built with the fit and electrical interface needed for direct replacement service. The TS10278 is a practical choice for vehicles such as the Audi A3, Volkswagen GTI, and Porsche Cayenne when the original sensor needs replacement.

Key Features

• Delphi engine coolant temperature sensor, part number TS10278
• Blade terminal type with 2 terminals
• 1 female oval connector
• Push-on mounting style
• Wiring harness not included
• Package contents: engine coolant temperature sensor and instruction sheet
• Rear position application listed for select vehicles

Detailed Description

The Delphi TS10278 monitors engine coolant temperature so the vehicle’s control system can manage fuel delivery, cooling fan operation, and temperature-related engine strategy. Delphi builds aftermarket parts using OE experience and knowledge developed through long-term work with top automakers, helping support consistent electrical performance and proper fitment. This part cross-references Beck/Arnley 158-0784 and Standard Ignition TS-608 for the same application.

Compatible With select Audi, Volkswagen, and Porsche models across 2002-2023, including applications such as Audi A4, Audi Q7, Volkswagen Tiguan, Volkswagen Passat, and Porsche Macan. The TS10278 part number is also referenced in multiple OE and aftermarket catalogs for related coolant temperature sensor applications.

What It Helps Address

• Incorrect coolant temperature readings on the dash or scan tool
• Hard starting or rough running caused by faulty temperature input
• Cooling fan operation that does not match engine temperature
• Check engine light concerns tied to coolant temperature sensor faults
• Driveability issues related to inaccurate engine temperature data

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. This sensor uses a female oval connector, 2 male blade terminals, and push-on mounting, so matching the OE connector and location is important. Fitment includes rear-position applications on select vehicles, and some listings note locations such as the water inlet, lower radiator hose, or exhaust pipe depending on the vehicle.

Always confirm the exact engine and sensor location for your Audi, Volkswagen, or Porsche application before replacement. The TS10278 is listed for many model years, including 2002-2023 coverage across multiple platforms.

Quality Assurance

Delphi draws on 100 years of OE experience and supplier knowledge built into its aftermarket parts. That OE-based engineering approach supports dependable replacement quality for service work on coolant temperature sensor applications.