What are vacuum hose diagrams?

Vacuum hose diagrams are used to show the layout of the vacuum hoses in a vehicle's engine. On modern vehicles, the vacuum hose diagrams are commonly found on a sticker located on the underside of the hood.

Vacuum hoses tend to have important layouts within the engine that need to be maintained. This is where a vacuum hose diagram comes in handy. In order to replace, repair or troubleshoot any issues with a vehicle's vacuum hoses, access to an accurate diagram is important. If a vehicle does not have a vacuum hose diagram on the underside of its hood, it is possible to locate the information by contacting the dealer or manufacturer directly.