Available in the contiguous U.S. only. Must choose Next Day Shipping at Checkout after entering code.
On Orders Over $99
Fast Shipping
Free shipping over $99

We ship from multiple warehouses across the country, so you get your part as soon as possible.

Industry Leading Warranty
We've got your back

Free, one year (or more), unlimited mileage warranty. Covers everything; parts and shipping costs

Guaranteed Exact Fit
Easy Installation

We have reviewed over 1,000,000 fitments to guarantee an exact fit for your vehicle.

Easy Returns
We're Here To Help

Return for any reason within 60 days for a full refund

30 Years of Service
We Love What We Do

Experts in auto parts since 1989-We are rated 4.9/5 by over 400,000 of our customers.

Available in the contiguous U.S. only. Must choose Next Day Shipping at Checkout after entering code.

Select Your Vehicle

What Does a Knock Sensor Do?

Knock sensors are the units in vehicles that monitor the pinging in the motor and help control the timing of the engine. The computer uses the input from the knock sensor along with the O2 sensors and air fuel ratio sensor to adjust the timing and fuel mixture in the pistons.

The engine in a modern vehicle has to be kept in perfect timing to ensure the top of efficiency and performance. This is done by toeing the line between running perfect and detonation. The perfect ignition of the air / fuel mixture happens at the exact moment that the piston is about to reach the top of its stroke. The timing is set this way to ensure the pressure has time to begin pushing the piston back down. When the spark plug is fired with the incorrect ignition timing or fuel mixture the pressure waves move out from the flame wall faster than the explosion itself. When this happens they impact the side wall at the incorrect time and a sound wave is created and detected. The element in the knock sensor is designed to detect this sound and alert the computer to adjust the timing.

All sensors in a vehicle are extremely important and are generally overlooked on basic maintenance. During automotive check ups it is important to remember to check the smaller parts such as sensors and filters to ensure protection from future issues.

No Comments Yet.

Leave a comment