Mazda 3 knock sensor

In order for the engine to run smoothly and instantly respond to a change in the number of revolutions by pressing the accelerator pedal, it is necessary to ensure the operability of all main and auxiliary elements.

The knock sensor of a Mazda 3 car is, at first glance, an insufficiently important element of the ignition system.

What is a knock sensor for?

Despite its small size, the knock sensor is a necessary element of the ignition system. The presence of this device prevents the explosive ignition of the fuel, thereby improving its dynamic characteristics.

Detonation not only negatively affects the throttle response of the engine, but also leads to increased wear of the main elements of the power unit. For this reason, this part must be kept in good condition at all times.

Symptoms of a malfunction

The operation of a car with a faulty knock sensor is undesirable, therefore, if there are deviations in the operation of the engine, it is necessary to check the ignition system as a whole and the condition of the element responsible for correcting the operation of the unit when explosive fuel is ignited, in particular. In order not to perform a large number of unnecessary actions, it is recommended that you familiarize yourself with the main symptoms of a malfunction. The presence of the following "symptoms" may indicate a malfunction of this part in the Mazda 3:

• Reduced engine power.
• Higher fuel consumption.

Also, if this part fails, the “Check Engine” may light up on the dashboard. Sometimes it only happens under heavy load.

How to replace

Replacing the knock sensor on a Mazda 3 car must begin with dismantling. In order not to accidentally remove another part, you need to know exactly where this element of the car's ignition system is located. To find the part, simply open the engine hood and look at the cylinder block. This part will be located between the second and third piston elements.

Work on replacing the knock sensor is carried out in the following sequence:

• Disconnect the negative battery terminal.
• Remove the intake manifold.
• Disconnect contact wires.
• Open the article.

Installing a new knock sensor is done in the reverse order of removal.

Timely replacement of this small element will prevent excessive fuel consumption, as well as excessive engine wear. Given the small weight and dimensions of this part, as well as the minimum time spent on replacing it, you can buy it in advance and always carry a new sensor in the trunk.