Coolant Temperature Sensors

Precision Engineered to Champion the Independent Aftermarket

The VXPRO range of Coolant Temperature Sensors includes OE-matching references for a wide range of applications, ensuring accurate engine temperature monitoring and reliable ECU feedback. These vital components support engine performance, emissions control, and dashboard temperature displays. Built to withstand extreme thermal cycling and vibration, VXPRO sensors deliver confidence with every installation.

Backed by a 5-year warranty and supported by TechASSIST and StockASSIST, VXPRO Coolant Temperature Sensors give technicians and stockists the quality they demand and the margin they need to Champion the Aftermarket.

Coolant Temperature Sensor

StockASSIST: Our Most Popular Coolant Temperature Switches

Coolant Temperature Sensors are essential for modern engine management and a common replacement part. Our StockASSIST service uses real-time demand and car parc data to help stockists carry the right references for their market.

Here are 10 of our most in-demand CTS references:

Coolant Temperature Sensor

EV0003

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0002

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0001

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0031

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0004

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0009

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0008

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0005

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0289

VXPRO Coolant Temperature Sensor

Coolant Temperature Sensor

EV0007

VXPRO Coolant Temperature Sensor

TechASSIST: Product Support and Information

Coolant Temperature Sensors monitor the temperature of the engine's coolant and send that information to the ECU. This data is used to adjust fuel delivery, ignition timing, cooling fan activation, and cold-start enrichment, while also driving dashboard temperature displays and overheat warnings.

Why Do They Fail?

CTS failure can result from:

  • Corrosion or thermal stress on internal components

  • Connector or wiring damage, leading to intermittent signal

  • Sensor housing cracks from over-tightening or repeated heat cycles

  • Coolant contamination or air pockets in the system

What Are the Symptoms?

A faulty coolant temperature sensor may cause:

  • Poor cold starting or rough idle

  • Inaccurate temperature readings or no reading at all

  • Overheating due to fans not activating

  • Poor fuel economy or emissions due to incorrect mixture control

  • Check Engine Light (MIL) with fault codes related to temperature or sensor circuit

Fitting Tips

  • Always inspect the connector and harness for corrosion or cracked insulation

  • Apply non-conductive thermal paste if recommended by OE specifications

  • Do not over-tighten — many CTS units are plastic-bodied and torque-sensitive

  • Bleed the cooling system properly after replacement to prevent airlocks

  • After installation, clear fault codes and monitor live data to confirm correct function