Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Coolant Temperature Sensor Replacement

Model: Mazda 3 BK, MK 1 - Years: 2003, 2004, 2005, 2006, 2007, 2008, 2009
Part: Engine coolant temperature sensor

See other generations:
Video tutorial

It is advisable to perform this maintenance with the engine cold to avoid unpleasant burns; the coolant temperature sensor is located at the rear right of the engine (when viewed from the front), behind the fourth cylinder. Once the connector is disconnected, use a 19 mm deep socket spanner due to the shape of the sensor; then unscrew the old sensor and install the new one by first hand-tightening it and then securing it with the spanner; finally, reconnect the connector, reset any error with a diagnostic tool, and start the engine to check its operation.


Updated on 11 February 2026 by ScegliAuto


Related tutorials

How to Replace the Coolant Temperature Sensor in a Mazda 3?
How to Replace the Coolant Temperature Sensor in a Mazda 3?
Mazda 3 (2003-2009 / BK, MK 1) Replacing the coolant temperature sensor in a Mazda 3, as shown in this tutorial, is an extremely simple and quick task. Before proceeding, wait for …
How to Replace the Temperature Sensor on a Mazda 3 2.3L
How to Replace the Temperature Sensor on a Mazda 3 2.3L
Mazda 3 (2009-2013 / BL, MK 2) Today, you will see the main instructions that will allow you to remove and replace the temperature sensor on the Mazda 3 2.3L by following these sim…
How to Remove the Outside Temperature Sensor on a Mazda 3
How to Remove the Outside Temperature Sensor on a Mazda 3
Mazda 3 (2003-2009 / BK, MK 1) In this guide, remove the outside temperature sensor on a Mazda 3. Lift the car on a column lift and remove the wheel. To access the temperature sens…

How to Open the Fuel Filler Flap in the Hyundai i30?

In this tutorial, you will learn how to open the fuel filler flap in the Hyundai i30, a very simple operation that follows the typical procedure of most vehicles. First, unlock the locks using the designated button on the remote, then open the driver's door, locate the release lever on the left side of the seat, and operate it. Next, move to the fuel filler flap, open it completely, unscrew the cap, and refuel as needed. To close the flap, simply press it gently.

Watch the video!


by ScegliAuto

More videos