What is a Subframe?

[OLukas]

Subframe can be regarded as the skeleton of the front and rear axles, and it is a component of the front and rear axles. More details are as follows: 1. Definition: A subframe is not a complete frame, but a bracket that supports the front and rear axles and suspension, allowing the axles and suspension to connect to the "main frame" through it, hence the name "subframe"; 2. Function: The subframe serves to block vibrations and noise, reducing their direct entry into the cabin, which is why it is mostly found in luxury cars and off-road vehicles. Some cars also have subframes installed for the engine. Traditionally, vehicles without subframes have their suspension directly connected to the body panels; 3. Connection Method: Before the advent of subframes, the suspension linkage mechanisms of the front and rear axles were individual components, not assemblies. With the introduction of subframes, the front and rear suspensions can be assembled onto the subframe to form an axle assembly, which is then installed onto the vehicle body as a whole.