A Car Key locks and unlocks the vehicle door and acts as the ignition device to start the engine. Today, however, many cars have “keyless” entry where the locks of the car operate with a remote control. Likewise, push button ignition is taking the place of key ignition.
A Kingpin refers to the main pivot in the steering mechanism of a car.
Kingpin Bushings fit into spindles in your car’s axel. The Kingpin fits into the bushings.
Engine “knocking” as the name suggests refers to “knocking” noises your car may make. Knocking can be caused by low quality, low octane gas, which tends to cause pre-ignition problems. Or it could be the result of deposits in your cylinder or dirty fuel injectors.